CROSS REFERENCE TO RELATED APPLICATIONS This application claims priority to U.S. Patent Application Serial No. 10/876,891 entitled "POLYMERIZATION CATALYSTS FOR PRODUCING POLYMERS WITH LOW LEVELS OF LONG CHAIN BRANCHING" which is incorporated herein. in its entirety..

TECHNICAL FIELD OF THE INVENTION This invention relates to the field of organometal compositions, olefin polymerization catalyst compositions, methods for the polymerization and copolymerization of olefins using a catalyst composition, and polyolefins.

BACKGROUND OF THE INVENTION It is known that mono- 1 -olefins (α-olefins), including ethylene, can be polymerized with catalyst compositions employing titanium, zirconium, vanadium, chromium, or other metals, pften combined with a solid oxide and in the presence of cocatalysts. These/catalyst compositions may be useful for both homopolymerization of ethylene, as well as copolymerization of ethylene with comonomers such as propylene, 1-butene, 1-hexene, or other higher α- olefϊns. Therefore, there exists a constant search to develop new olefin polymerization catalysts, catalyst activation processes, and methods of making and using catalysts that will provide enhanced catalytic activities and polymeric materials tailored to specific end uses. Polyethylene (PE) produced by any number of methods generally contains small to moderate amounts of long chain branched molecules. In some instances, long chain branching (LCB) is desired to improve bubble stability during film blowing or ;to, . enhance the processibility of resins prepared with metallocene catalysts. However for many uses, the presence of LCB is considered undesirable due to the increased elasticity that it typically imparts to the resins. Therefore, the ability to control the LCB level in polyethylene using metallocene-based catalysts is a desirable goal. One example of this need is , seen in the use of bridged or ansa- metallocene catalysts, which are desirable catalysts for some purposes, but which may tend to produce. polymer with LCB levels that are detrimental to film performance. Therefore, new catalyst compositions and methods that allow better control of LCB levels within a desired specification range is a desirable goal.

SUMMARY OF THE INVENTION This invention encompasses catalyst compositions, methods for preparing catalyst compositions, methods for polymerizing olefins, and ethylene polymers and copolymers. In the course of examining metallocene- based olefin polymerization catalysts, ϊi was discovered that the LCB content of PE resins made with such catalysts, was related to the type of metallocene catalyst employed, and also related, to the particular solid oxide activator, or "activator-support" which constitutes one component of the catalyst composition. In one aspect, the present, " invention encompasses a catalyst composition comprising a tightly-bridged αnsα-metallocene compound containing a pendant unsaturated moiety attached to the bridge, a solid oxide activator-support, and an organoaluminum compound. The pendant unsaturated moiety attached to the bridge of the αnsα-metallocene compound may be a pendant olefin. In another aspect, this invention comprises the contact product of a tightly-bridged α/j-fα-metallocene compound containing a pendant unsaturated moiety attached to the bridge, a solid oxide, activator- support, and an organoaluminum compound. In one aspect, the catalyst composition of this invention can comprise the contact product of at least one αrcsα-metallocene, at least one organoaluminum compound, and at least one activator-support, wherein: a) the αnsβ-metalloceήe - .comprises a compound having the formula: (X1)(X2)(X3)(X4)M1, wherein M1 is titanium, zirconium, or hafnium; (X1) and (X2) are independently a cyclopentadienyl, an indenyl, a fluorenyl, or a substituted analog thereof;. (X1) and (X2) are connected by a substituted bridging group comprising one atom bonded to both (X1) and (X2) comprising carbon, silicon, germanium, or tin; wherein one substituent of the substituted bridging group comprises an unsaturated group comprising an alkenyl group, an alkynyl group, an alkadienyl group, or a , substituted analog thereof, any of which having from 1 to 20 carbon atoms; and : any additional substituent on the substituted bridging group; any substituent on the substituted alkenyl, substituted alkynyl, or substituted alkadienyl group bonded to the bridging group; any substituent on (X1) and (X2); and (X3) and (X4) are independently an aliphatic group, an aromatic group, a cyclic group, a combination of aliphatic and cyclic groups, an oxygen group, a sulfur group, a nitrogen group, a phosphorus group, an arsenic group, a carbon group, a silicon group, a germanium group, a tin group, a lead group, a boron group, an aluminum group, an inorganic group, an organometallic group, or a substituted derivative thereof, any of which having from 1 to 20 carbon atoms; a halide; or hydrogen; b) the organoaluminum compound comprises a compound with the formula: Al(X5)n(X6)3-n, wherein (X5) is a hydrocarbyl having from 1 to 20 carbon atoms; (X6) is an alkoxide or aryloxide. any of which having from 1 to 20 carbon atoms, a halide, or a; hydride; and n is a number from 1 to 3, inclusive; and ■• ■ '• ' ■ • • ■ c) the activator-support comprises: a solid oxide treated with an electron- withdrawing anion; a layered mineral, . an ion-exchangeable activator-support, or any combination thereof, In this aspect, the catalyst composition of this invention can comprise at least one α«5fl-metallocene, at least one organoaluminum compound, and at least one activator-support. In a further aspect of this invention, the activator-support can comprise a solid oxide treated with an electron-withdrawing anion, wherein the solid oxide comprises silica, . alumina, silica-alumina, aluminum phosphate, heteropolytungstates, titania, zirconia, magnesia, boria, zinc oxide, mixed oxides thereof, or mixtures thereof. In this aspect, the electron- withdrawing anion can comprise fluoride, chloride, bromide, iodide, phosphate, triflate, bisulfate, sulfate, fluoroborate, fluorbsulfate, trifluoroacetate, phosphate, fluorophosphate, fluorozircoήate, flύorpsilicate, fluorotitanate, permanganate, substituted sulfonate, unsubstituted sulfonate, or any combination thereof. In addition, the activator-support can further comprises a metal or metal ion such as zinc, nickel, vanadium, tungsten, molybdenum, silver, tin, or any combination thereof. ' . \ ; In a further aspect of this invention, the activator-support can comprise a layered mineral, . an ion-exchangeable activator-support, or any combination thereof. In this aspect, the activator-support can comprise a clay mineral, a pillared clay, an exfoliated clay, an exfoliated clay gelled into another oxide matrix, a layered silicate mineral,- a non-layered silicate mineral, a layered aluminosilicate mineral, a non-layered aluminosilicate mineral, or any combination thereof. . ■ In another aspect, this invention further provides a process for producing a polymerization catalyst composition comprising contacting at least one ατ«<2-metallocene compound, at least one organoaluminum compound, and at least one treated solid oxide compound to produce the composition, wherein the at least, one αwsα-metallocene, the at least, one organoaluminum compound,, and the at least one activator-support are defined as herein. In still another aspect, this invention affords a method of polymerizing olefins, comprising: contacting ethylene and an optional α-olefm comonomer with a catalyst composition under polymerization conditions to form a polymer or copolymer; wherein the catalyst composition comprises the contact product of at least, one ansa-metallocene, at least one organoaluminum compound, and at least one activator-support, and wherein the at least one α/wα-metallocene, the at least one organoaluminum compound, and the at least one activator-support are defined as herein. In a further aspect, the present invention provides ethylene polymers and copolymers, and articles made .therefrom, produced by contacting ethylene and an optional α-olefin comonomer with a catalyst composition under polymerization conditions to form a polymer or copolymer; wherein the catalyst composition comprises the contact product of at least one ansa- metallocene, at least one organoaluminum compound, and at least one activator-support, and wherein the at least one αnsα-metallocene, the at least one organoaluminum compound, and the at least one activator-support are defined as herein. In another aspect of this invention, the ansa-metallocene of the catalyst composition can be selected from a compound I with the following formula:

wherein E comprises carbon, silicon, germanium, or tin; R1 is H or a hydrocarbyl group having from.1 to .12 carbon atoms; R2 is an alkenyl group having from 3 to 12 carbon atoms;. and R3 is H or a hydrocarbyl group having from 1 to 12 carbon atoms. In still another aspect of this invention, the α/wα-metallocene of the catalyst composition can be a compound I with the following formula:

wherein E is carbon R2 is 3-butenyl (CH2CH2CH=CH2), 4-pentenyl (CH2CH2CH2CH=CH2), 5-hexenyl (CH2CH2CH2CH2CH=CH2), 6-heptenyl (CH2CH2CH2CH2CH2CH=CH2), 7- octenyl (CH2CH2CH2CH2CH2CH2CH=CH2), 3-methyl-3-butenyl (eH2CH2C(CH3)=CH2), or 4-methyl-3-pentenyl (CH2CH2CH=C(CH3)2); and R3 is H or f-butyl. ■ '■;' .•' : ' 5 022849

In another aspect of this invention^, the αrøα-metallocene of the catalyst composition can be a compound II with the following formula:

wherein R1 is methyl or phenyl; R2 is 3-butenyl (CH2CH2CH=CH2) or A- pentenyl (CH2CH2CH2CH-CH2); and R3 is H or t-butyl. In yet another e of the catalyst composition c a:

wherein R1 is methyl or phenyl; and R2 is 3-butenyl (CH2CH2CH=CH2), A- pentenyl .(CH2CH2CH2CH=CH2), 5-hexenyl (CH2CH2CH2CH2CH=CH2), 6- heptenyl (CH2CH2CH2CH2CH2CH=CH2), or 7-octenyl (CH2CH2CH2CH2CH2CH2CH=CHi), In another aspect of this invention, the activator-support can comprise: a solid oxide treated. with an electron- withdrawing anion (also termed a chemically- treated solid oxide); a layered mineral; . an ion-exchangeable activator-support; or any combination thereof.: .. In this aspect, the chemically-treated solid oxide comprising a solid oxide treated with an electron-withdrawing anion; wherein: the solid oxide can be selected from silica, alumina, silica- alumina, aluminum phosphate, . heteropolytungstates, titania, zirconia, magnesia, boria, zinc oxide, mixed oxides thereof, or mixtures thereof; and the electron-withdrawing anion can be fluoride, chloride, bromide, iodide, phosphate, . triflate, bisulfate, sulfate, fluoroborate, fluorosulfate, trifluoroacetate, phosphate, fluorophosphate, fluorozirconate, fluorosilicate, fluorotitanate, permanganate, substituted sulfonate, unsubstituted sulfonate, or any combination thereof. Also in this aspect, the activator-support can comprise a clay mineral, a pillared clay, an exfoliated clay, an exfoliated clay gelled into1 another oxide matrix, a layered silicate mineral, a non-layered silicate mineral, a layered aluminosilicate mineral, a non-layered aluminosilicate mineral, or any combination thereof. In a further aspect, the activator-support can further comprise a metal or metal ion such as zinc, nickel, vanadium, tungsten, molybdenum, silver, tin, or any combination thereof. • " Examples of the solid oxide .activator-support include, but are not limited to, chlorided alumina, fluorided alumina, sulfated alumina, fluorided silica-alumina, a pillared clay, or a combination thereof. In another apect, for examples, the activator-support can be a sulfated solid oxide, and in another aspect, sulfated alumina, ' ' ' .. " In another aspect of the inyerition^ the organoaluminum compound comprises a compound of the formula Al(X5)n(X6)3-n, wherein (X5) is a hydrocarbyl having from 1 to 20 carbon atoms; (X6) is an alkoxide or aryloxide, any of which having from 1 to 20 carbon atoms, halide, or hydride; and n is a number from 1 to 3, inclusive. In another aspect, the organoaluminum compound may;- be;. selected, from trimethylaluminum, triethylaluminum, tripropylalύminum, tributylaluminum, triisobutylaluminum, trihexylaluminum, triisohexylaluminum, trioctylaluminum, diethylaluminum ethoxide, diisobutylaluminum hydride, diethylaluminum chloride, or any

■ ■ ' '' • ■ "• -.' - S -. combination thereof. Examples of the organoalurninum compound include, but are not limited to, triethylaluminum (TEA) or triisobutylaluminum (TIBAL). In one aspect of this invention, the activity of the catalyst compositions of this invention may be enhanced by precoήtacting some of the polymerization reaction components to form a first mixture, for a first period of time, before this mixture is then contacted with the remaining polymerization reaction components, forming a second mixture, for a second period of time. For example, the άnsα-metallocene compound can be precontacted with some other polymerization reaction components, including, but not limited to, for example, an α-olefm monomer and an organoaluminum cocatalyst, for some period of time before this mixture is contacted with the remaining polymerization reaction components, including, but not limited to, a solid oxide activator-support. The first mixture is typically termed the "precontacted" mixture and comprises precontacted components, and the second mixture is typically termed the "postcontacted" mixture and comprises postcontacted components. For example, the mixture of at least one metallocene, olefin monomer, and organoaluminum cocatalyst compound, before it is contacted with the activator-support, is one type of "precontacted" mixture. The mixture of metalloceήe, monomer, organoaluminum cocatalyst, and acidic activator-support, formed from, contacting the precontacted mixture with the acidic activator-support, is thus termed the "postcontacted" mixture. This terminology is used regardless of what type of reaction occurs between components of the mixtures. For example, according to this description, it is possible for the precontacted prganoalurhinum .compound, once it is admixed with the metallocene or metallocenes and the olefin monomer, to have a different chemical formulation and structure from the distinct organoaluminum compound used to prepare the precontacted mixture.

/.' .9: This invention also comprises methods of making catalyst compositions that utilize at least one αnsα-metallocene catalyst, at least one organoaluminum compound as cocatalysts, and a solid oxide activator-support. The methods of this invention include precontacting the metallocene catalyst and an organoaluminum cocatalyst with an olefin, typically but not necessarily, a monomer to be polymerized or copolymerized, prior to contacting this precontacted mixture with the solid oxide activator-support. The present invention further comprises new catalyst compositions, methods for preparing catalyst compositions,1 and methods for polymerizing olefins that result in improved productivity. In one aspect, these methods can be carried out without the need for using large excess concentrations of the expensive cocatalyst methyl aluminoxane (MAO), or the catalyst composition can be substantially free of MAO. . However, this invention also provides a catalyst composition comprising an , cins<3-metallocene compound and an aluminoxane. In this aspect, the catalyst composition is not required to comprise either an acidic activator-support wherein the activator-support comprises a chemically-treated solid, oxide, and the catalyst composition is also not required to comprise an organoaluminum compound. Additionally, this invention-.- encompasses a process comprising contacting at least one monomer and the catalyst composition under polymerization conditions to produce the polymer. Thus, this invention comprises methods for polymerizing olefins using the catalyst compositions prepared as described herein.. . The present invention also encompasses new polyolefins. This invention also comprises an article that comprises the polymer produced with the catalyst composition of. this invention. These and other features, aspects, embodiments, and advantages of the present invention will become apparent after a review of the following. detailed description of the disclosed features, , . 49

The following patent applications, filed contemporaneously with the present application, are incorporated by reference herein in their entireties: U.S.PATENT APPLICATION SEKIAL NUMBERS 10/876,930, 10/877,039, 10/876,948, and 10/877021.

BRIEF DESCRIPTION OF THE FIGURES FIGURE 1 illustrates the specific structures of the metallocenes used in the Examples and Tables. . ' .■ ••:•' . FIGURE 2 provides comparison gel permeation chromatograms (GPCs) for ethylene homopolymer of Examples 5-9, indicated as E.5 through E.9 in Figure 2. FIGURE 3 illustrates one diagram obtained from SEC-MALS analysis of the ethylene homopolymer prodμced in Examples 5-9 (plot of Rg versus Mw). FIGURE 4 shows a diagram obtained from SEC-MALS data and compares the LCB concentrations of the two PE samples made according to Examples 10 and 11. FIGURE 5 provides a plot of log η(0) versus log (Mw) for polymers prepared according to Examples 18-23 and Table 3.

DETAILED DESCRIPTION OF THE INVENTION The present invention provides new catalyst compositions, methods for preparing catalyst compositions, methods for using. the catalyst compositions to polymerize olefins, olefin polymers and articles prepared therefrom. In one aspect, this invention encompasses a catalyst composition comprising a tightly-bridged αrøsα-metallocene compound containing an olefin functionality pendant to the bridge, a solid oxide activator-support, and an organoaluminum compound. In another aspect, this invention. comprises methods for making and using the catalyst composition. • ' • '

Catalyst Composition and Components The Metallocene Compound in one aspect, the present invention provides a catalyst composition comprising a bridged or αnsα-metallocene compound containing a pendant unsaturated moiety attached to the. bridge, along with a solid oxide activator- support and an organoaluminum compound further disclosed herein. As used herein, the term αnsα-metallocene refers simply to a metallocene compound in which the. two η5-cycloalkadienyl-type ligands in the molecule are linked by a bridging moiety. . Useful αrarø-metallocenes are typically "tightly-bridged", meaning that the two η5-cycloalkadienyl-type ligands are connected by a bridging group wherein the shortest link of the bridging moiety between the η5-cycloalkadienyl-type ligands is a single atom. Thus, the length of the bridge or -, the chain between the two η5- cycloalkadienyl-type ligands is one atom, although this bridging atom is substituted. The metallocenes of this invention are therefore bridged bis(η5- cycloalkadienyl)-type compounds, wherein the η5-cycloalkadienyl portions include cyclopentadienyl ligands, indenyl ligands, fluorenyl ligands, and the like, including substituted analogs of any of these. Further, the bridge that . connects the two η5-cycloalkadienyl-type ligands is substituted with a pendant unsaturated group. That is, one substituent of the substituted bridging group comprises an unsaturated group comprising an alkenyl group, an alkynyl group, an alkadienyl group, or a substituted analog thereof. In one aspect of the invention, one substituent of the substituted bridging group, comprises an alkenyl group, in which case the αrøα-metallocenes may be described as containing a chain with a pendant olefin attached to the bridge. In one aspect, the ansa-meiallocene of this invention comprises a compound having the formula: ■ (X1XX2XX3XX4'^1, wherein M1 is titanium, zircpniurri/ or hafnium; (X1) and (X2) are. independently a cyclopentadienyl, an indenyl, a fhiorenyl, or a substituted analog thereof; (X1) and (X2) are connected by a substituted bridging group comprising one atom bonded to both (X1) and (X2) comprising carbon, silicon, germanium, or tin; wherein one substituent of .the substituted bridging group comprises an unsaturated group comprising an alkenyl group, an alkynyl group, an alkadienyl group, or a substituted analog thereof, any of which having from 1 to 20 carbon atoms; and any additional substituent on the substituted bridging group; any substituent on the substituted alkenyl, substituted alkynyl, or substituted alkadienyl group bonded to the bridging group; any substituent on (X1) and (X2); and (X3) and (X4) are independently an aliphatic group, an aromatic group, a cyclic group, a combination of aliphatic and cyclic groups, an oxygen group, a sulfur group, a nitrogen group, a phosphorus group, an arsenic group, a carbon group, a silicon group., a germanium group, a tin group, a lead group, a boron group, an aluminum group, ah inorganic group, an organometallic group, or a substituted derivative thereof any of which having from 1 to 20 carbon atoms; a halide; or hydrogen. The linkage that connects (X1:) and (X2), that is, the shortest link of the bridging moiety, is a single atom comprising a carbon, silicon, germanium, or tin atom. In one aspect, the bridging atom is a carbon or silicon atom, in which case the bridge comprises a substituted methylene (or methylidene) group or a substituted silylene group: In another aspect, one substituent of the substituted bridging group comprises an unsaturated group comprising an alkenyl group, an alkynyl group, an alkadienyl group, or a substituted analog thereof, any of which has from 1 to 20 carbon, atoms. In yet another aspect, this substituent of the substituted bridging group comprises an alkenyl group or a substituted alkenyl group. Examples of alkenyl groups include, but are not limited to, butenyl, pentenyl, hexenyl, heptenyl, or octenyl. In another aspect, the alkenyl group is 3 -butenyl or 4-pentenyl. Thus, in one aspect, the pendant unsaturated group can contain the carbon-carbon double bond from 3 to 7 carbon atoms removed from the bridging atom itself!;, and in another aspect, from 3 to 4 carbon atoms removed from.the bridging atom itself. In addition to an alkenyl, . alkynyl, or alkadienyl group, any other substituent on the bridging atom, when present, is independently an aliphatic group, an aromatic group, a cyclic group, a combination of aliphatic and cyclic groups, an oxygen group, a sulfur .■group, a nitrogen group, a phosphorus group, an arsenic group, a carbon group, a silicon group, a germanium group, a tin group, a lead group, a boron group, an aluminum group, an inorganic group, an organometallic group, or a substituted derivative thereof, any of which having from 1 to 20 carbon atoms; a halide; or hydrogen. Further, this description of other substituents on the bridging atom can include substituted, unsubstituted, branched, linear, or' heteroatorή-substituted analogs of these moieties. Further, it is not necessary that the bridging atom be substituted, other than by one unsaturated group such as an alkenyl, alkynyl, or alkadienyl group. For example, if the bridge connecting (X1) and (X2) comprises a substituted methylene (or methylide'ne) group, the methylidene carbon could be substituted with, for example, a 3-butenyl ' group, while the methylidene carbon can also contain a hydrogen atom bonded to it, rather than a hydrocarbyl group. Examples of unsaturated groups that can. be bonded to the bridging group include, but are not limited to, 3-butenyl (CH2CH2CH=CH2), 4-pentenyl (CH2CH2CH2CH=CH2), 5-hexenyl . (CH2CH2CH2CH2CH=CH2), 6-heptenyl (CH2CH2CH2CH2CH2CH=CH2), . 7-octenyl (CH2CH2CH2CH2CH2CH2- CH=CH2), 3-methyl-3-butenyl (GH2CH2C(CH3)=CH2), 4-methyl-3-pentenyl (CH2CH2CH=C(CH3)2), or a substituted analog thereof. In one aspect, the unsaturated group bonded to the bridging group can be 3-butenyl (CH2CH2CH=CH2), 4-pentenyl (CHiCHiCH2CH=CH2), or a substituted analog thereof. Thus, examples of bridging groups between (X1) and (X2) include, but are not limited . to: methyl-3-butenylmethylidene (μ- CCH3(CH2CH2CH=CH2)); methyl-4-pentenylmethylidene (μ- CCH3(CH2CH2CH2CH=CH2)); phenyl-3-butenylmethylidene (μ- C(C6H5)(CH2CH2CH=CH2)); . phenyl-4-peritenylmethylidene (μ- C(C6H5)(CH2CH2CH2CH=CH2));. and the like. . In addition to containing a bridging group, (X1) and (X2) may also have other substituents. Further, the alkenyl, alkynyl, or alkadienyl group bonded to the bridging group may also have substituents. In either case, these substituents are selected from the .same chemical groups or moieties that can serve as the (X3) and (X4) ligands of the αrøβ-metallocenes. Thus, any additional substituent on the substituted bridging group; any substituent on the substituted alkenyl, . substituted alkynyl, or substituted alkadienyl group bonded to the bridging group; any substituent on (X1) and (X2); and (X3) and (X4) are. independently an aliphatic group, an aromatic group, a cyclic group, a combination of aliphatic and cyclic groups, an oxygen group, a sulfur group, a nitrogen group, a phosphorus group, an arsenic group, a carbon group, a silicon group, a germanium group, a tin group, a lead group, a boron group, an aluminum group, an inorganic group, an organometallic group, or a substituted derivative thereof, any of which having from 1 to 20 carbon atoms; a halide; or hydrogen; as long as these groups do not terminate the activity of the catalyst composition. Further, this list includes substituents that may be characterized in more than one of these categories such as benzyl. This list also includes hydrogen, therefore the notion of a substituted indenyl and substituted fluorenyl includes partially saturated indenyls and fluorenyls including, but not limited to, tetrahydroindenyls, tetrahydrofluorenyls, and octahydrofluorenyls. • Examples of each of these"., substituent groups include, but are not limited to, the following groups. In each example presented below, unless otherwise specified, R is independently an aliphatic group; an aromatic group; a cyclic group; any combination thereof; any substituted derivative thereof, including but not limited to, a halidβ;, an alkoxide-, or an amide-substituted derivative thereof; any of which has from 1 to 20 carbon atoms; or hydrogen. Also included in these groups are any unsubstituted, branched, or linear analogs thereof. Examples of aliphatic groups, in each instance, include, but are not limited to, an alkyl group, a cycloalkyl group, an alkenyl group, a cycloalkenyl group, an alkynyl group, an alkadieriyl. group, a cyclic group, and the like, and includes all substituted, unsubstjtuted, branched, and linear analogs or derivatives thereof, in each instance. having from one to 20 carbon atoms. Thus, aliphatic groups include, but are not limited to, hydrocarbyls such as paraffins and alkenyls. For example, aliphatic groups as used herein include methyl, ethyl, propyl, n-butyl, tert-butyϊ, secrbutyl, isobutyl, amyl, isoamyl, hexyl, cyclohexyl, heptyl, octyl, nonyl,;decyl, dodecyl, 2-ethylhexyl, pentenyl, butenyl, and the like. Examples of aromatic groups, in each instance, include, but are not limited to, phenyl, naphthyl, anthracenyl, and the like, including substituted derivatives thereof, in each instance having from 6 to 25 carbons. Substituted derivatives of aromatic compounds include, but are not limited to, tolyl, xylyl, mesityl, and the like, including any heteroatom substituted derivative thereof. Examples of cyclic groups, in each instance, include, but are not limited to, cycloparaffms, cycloolefins, cycloacetylenes, arenes such as phenyl, bicyclic groups and the like, including substituted derivatives thereof, in each instance having from 3 to 20 carbon atoms. Thus heteroatom- substituted cyclic groups such as fbranyl. are included herein. In each instance, aliphatic and cyclic groups are groups comprising an aliphatic portion and a cyclic portion, examples of which include, but are not limited to, groups such as: -(CH2)mC6HqR5-q wherein m is an integer from 1 to 10, and q is an integer from 1 to 5, inclusive; -(CH2)H1C6HqR11-q wherein m is an integer from 1 to 10, and q is ail integer from 1 to 11, inclusive; or - (CH2)mC5HqR9_q wherein m is an integer from 1 to 10, and q is an integer from 1 to 9, inclusive. In each instance and as defined above, R is independently : an aliphatic group; an aromatic group; a cyclic group; any combination thereof; . any substituted derivative thereof,, including but not limited to, a halide-, an alkoxide-, or an amide-substituted derivative thereof; any of which has from 1 to 20 carbon atoms; or hydrogen. /In one aspect, aliphatic and cyclic groups include, but are not limited to: -CH2C6H5; -CH2C6H4F;- CH2C6H4Cl; -CH2C6H4Br; -CH2C6H4Ij-CH2C6H4OMe; -CH2C6H4OEt; - CH2C6H4NH2; -CH2C6H4NMe2; -CH2C6H4NEt2; -CH2CH2C6H5; - CH2CzH2C6H4I1; -CH2CH2C6H4Cl; . -CzH2CzH2C6H4Br; -CH2CzH2C6H4I; CH2CH2C6H4OMe; -CH2CH2C6H4OEt; -CH2CH2C6H4NH2; CH2CH2C6H4NMe2; -CH2CH2C6H4NEt2; any regioisomer thereof, and any substituted derivative thereof. . . Examples of halides, in each instance, include fluoride, chloride, bromide, and iodide. ■ " In each instance, oxygen - groups are oxygen-containing groups, examples of which include, but are not limited to, alkoxy or aryloxy groups (- OR), -OC(O)R, -OC(O)H, -OSiR3, -OPR2, -OAlR2, and the like* including substituted derivatives thereof, wherein R in each instance is alkyl, cycloalkyl, aryl, aralkyl, substituted alkyl, substituted aryl, or substituted aralkyl having from 1 to 20 carbon atoms. Examples of alkoxy or aryloxy groups (-OR) groups include, but are not limited to, methoxy, ethoxy, propoxy, butoxy, phenoxy , substituted phenoxy, and the like. In each instance, sulfur groups are sulfur-containing groups, examples of which include, but are not limited to, -SR, - OSO2R, -OSO2OR, -SCN, - SO2R, and the like, including substituted derivatives thereof, wherein R in each instance is alkyl, cycloalkyl, aryl, aralkyl, substituted alkyl, substituted aryl, or substituted aralkyl having from 1 to 20 carbon atoms. In each instance, nitrogen groups1 are nitrogen-containing groups, which include, but are not limited to, -NH2, -NHR, -NR2, -NO2, -N3, and the like, including substituted derivatives thereof, wherein R in each instance is alkyl, cycloalkyl, aryl, aralkyl, substituted alkyl, substituted aryl, or substituted aralkyl having from 1 to 20 carbon atoms. In each instance, phosphorus, groups are phosphorus-containing groups, which include, but are not limited to, -PH2, -PHR, -PR2, -P(O)R2, -P(OR)2, - P(O)(OR)2, and the like, including substituted derivatives thereof, wherein R in each instance is alkyl, cycloalkyl, aryl, aralkyl, substituted alkyl, substituted aryl, or substituted aralkyl.having from 1 to 20 carbon atoms. In each instance, arsenic grόupsV.are arsenic-containing groups, which include, but are not limited to,; -AsHR, -AsR2, -As(O)R2, -As(OR)2, - As(O)(OR)2, and the like, including substituted derivatives thereof, wherein R in each instance is alkyl, cycloalkyl, aryl, aralkyl, substituted alkyl, substituted aryl, or substituted aralkyl haying from 1 to 20 carbon atoms. In each instance, carbon groKps,;are carbon-containing groups, which include, but are not limited' to, alkyl halide groups that comprise halide- substituted alkyl groups with 1 to. 20 carbon atoms, aralkyl groups with 1 to 20 carbon atoms, -C(O)H, -C(O)R5 -G(O)OR5 cyano, -C(NR)H, -C(NR)R3 - C(NR)OR5 and the like, including substituted derivatives thereof, wherein R in each instance is alkyl, cycloalkyl, aryl, aralkyl, substituted alkyl, substituted aryl, or substituted aralkyl having from 1 to 20 carbon atoms. In each instance, silicon groups are silicon-containing groups, which include, but are not limited to, silyl groups such alkylsilyl groups, arylsilyl groups, arylalkylsilyl groups, siloxy groups, and- the like, which in each instance have from 1 to 20 carbon atoms. For example, silicon groups include trimethylsilyl and phenyloctylsilyl groups. In each instance, germanium groups are germanium-containing groups, which include, but are not limited1 to,, germyl groups such alkylgermyl groups, arylgermyl groups, arylalkylgermyl groups, germyloxy groups, and the like, which in each instance have from 1 to 20 carbon atoms. In each instance, tin groups are tin-containing groups, which include, but are not limited to, stannyl groups such alkylstannyl groups, arylstannyl groups, arylalkylstannyl groups, stariήoxy (or "stannyloxy") groups, and the like, which in each instance have from 1 to 20 carbon atoms. Thus, tin groups include, but are not limited to, stannoxy groups. In each instance, lead groups are lead-containing groups, which include, but are not limited to, alkyϊlead groups, aryllead groups, arylalkyllead groups, and the like, which in each instance, have from 1 to 20 carbon atoms. In each instance, boron groups are boron-containing groups, which include, but are not limited to, -BR2, -BX2, -BRX, wherein X is a monoanionic group such as halide, hydride, alkpxide, alkyl thiolate, and the like, and wherein R in each instance is alkyl, cyjcloalkyl, aryl, aralkyl, substituted alkyl, substituted aryl, or substituted aralkyl. having. from 1 to 20 carbon atoms. In each instance, aluminum groups are aluminum-containing groups, which include, but are not limited to, -AlR2, -AlX2, -AlRX, wherein X is a monoanionic group such as halide, hydride, alkoxide, alkyl thiolate, and the like, and wherein R in each instance is alkyl, cycloalkyl, aryl, aralkyl, substituted alkyl, substituted aryl, or substituted aralkyl having from 1 to 20 carbon atoms. . Examples of inorganic groups, that may be used as substituents for substituted cyclopentadienyls, substituted indenyls, substituted fluorenyls, and substituted boratabenzenes, in each, instance, include, but are not limited to, - SO2X, -OAlX2, -OSiX3, -OPX25 -SX5 - OSO2X, -AsX2, -As(O)X 2, -PX2, and the like, wherein X is a monoanionic group such as halide, hydride, amide, alkoxide, alkyl thiolate, and the like, and wherein any alkyl, cycloalkyl, aryl, aralkyl, substituted alkyl, substituted aryl, or substituted aralkyl group or substituent on these ligands has from 1 to 20 carbon atoms. Examples of organometallic groups that may be used as substituents for substituted cyclopentadienyls, substituted indenyls, and substituted fluorenyls, in each instance, include,, but are not limited , to, organoboron groups, organoaluminum groups, organogallium groups, organosilicon groups, organogermanium groups, όrganotin groups, organolead groups, organo- transition metal groups, and the like, having from 1 to 20 carbon atoms. In another aspect of this invention, (X3) and (X4) are independently an aliphatic group, a cyclic group, a combination of an aliphatic group and a cyclic group, an amido group, a phosphϊdo group, an alkyloxide group, an aryloxide group, an organometallic group, or a substituted derivative thereof, any of which having from 1 to 20 carbon atoms; or a halide. In another aspect, (X3) and (X4) are independently a hydrocarbyl having from 1 to 10 carbon atoms, or a halide. In another aspect, (X3) and (X4) are independently fluoride, chloride, bromide, or, iodide.. In yet another aspect, (X3) and (X4) are chloride. . • . Numerous processes to prepare nietallocene compounds that can be employed in this invention have been reported. For example, U.S. Patent Nos. 4,939,217, 5,191,132, 5,210,352, 5,347,026, 5,399,636, 5,401,817, 5,420,320, 5,436,305, 5,451,649, 5,496,781, 5,498,581, 5,541,272, 5,554,795, 5,563,284, 5,565,592, 5,571,880, 5,594,078, 5,631,203, 5,631,335, 5,654,454, 5,668,230, 5,705,578, 5,705,579, 6,187,880, and.6,509,427 describe such methods, each of which is incorporated by reference herein, in its entirety. Other processes to prepare metallocene compounds that can.be employed in this invention have been reported in references such as: Kδppl, A. Alt, H, G. J. MoI. Catal A. 2001, 165, 23; Kajigaeshi, S.; Kadowaki, T.; Nishida, A.; Fujisaki, S. The Chemical Society of Japan, 1986, 59, 97; Alt, H. G.; Jung, M.; Kehr, G. J. Organomet. Chein. 1998, .562, 153-181; and Alt, H. G.; Jung, M. J. Organomet. Chem. 1998, 568, 87-112; each of which is incorporated by reference herein, in its entirety. The following treatises also describe such methods: Wailes, P. C; Courts, R. S. P.; Weigold, H. in Organometallic Chemistry of Titanium, Zironium, arid Hafnium, Academic; New York, 1974. ; Cardin, D. J.; Lappert, M. F.; and JRaston, C. L.; Chemistry of Organo- Zirconium and -Hafnium Compounds; Halstead Press; New York, 1986. In yet another aspect of this invention, examples of the ansa- metallocene that are useful in the catalyst composition of this invention include a compound with

wherein E is carbon, silicon, germanium, or tin; R1 is H or a hydrocarbyl group having from 1 to 12 carbon atoms; R2 is an alkenyl group having from 3 to 12 carbon atoms; and R3 is H or a hydrocarbyl group having from 1 to 12 carbon atoms. • • ' ■ • • In another aspect, examples of the αrcsα-metallocene that are useful in the catalyst composition of this invention include a compound with the formula I:

wherein E is carbon or silicon; R1 is methyl or phenyl; R2 is 3-butenyl (CH2CH2CH=CH2), 4-pentenyl . (CH2CH2CH2CH=CH2), 5-hexenyl (CH2CH2CH2CH2CH=CH2), 6-heptenyl (CH2CH2CH2CH2CH2CH=CH2), 7- octenyl (CH2CH2CH2CH2CH2CH2CH=CH2), 3-methyl-3-butenyl (CH2CH2C(CHs)=CH2), or 4-methyl-3-ρentenyl (CH2CH2CH=C(CH3)2); and R3 is H or t-butyl. In still another aspect of this invention, the αnsα-metallocene of the catalyst composition is a compound with formula II:

CH=CH2) or 4-

In another aspect, the αnsα-metallocene of the catalyst composition is a compound with formula III: wherein R1 is methyl or phenyl; and: R2 is 3-butenyl (CH2CH2CH=CH2), 4- pentenyl (CH2CH2CH2CH=CH2), 5-hexenyl (CH2CH2CH2CH2CH=CH2), 6- heptenyl (CH2CH2CH2CH2CH2CH=CH2), or 7-octenyl (CH2CH2CH2CH2CH2CH2CH=CH2)! In another aspect of this invention, the α/zsα-metallocene of this invention may be : : - methyl-3-butenylmethylidene(η5-cyclopentadienyl)(η5-9-fluo renyl)- zirconium dichloride; • methyl-3-butenylmethylidene(η5-cyclopentadienyl)(η5-2,7-di -f-butyl-9- fluorenyl)zirconium dichloride; methyl-4-ρentenylmethylidene(ή5-cyclopentadienyl)(η5-9-fl uorenyl)- zirconium dichloride; " V -." methyl-4-pentenylmethylidene(η5-cyclopentadienyl)(η5-2,7-d i-t-butyl- 9-fluorenyl)zirconium dichloride; methyl-5-hexenylmethylidene(η5-cyclopentadienyl)(η5-9-fluo renyl)- zirconium dichloride; methyl-5-hexenylmethyliden:.e(ή:5-cycloperitadienyl)(η5-2, 7-di-t-butyl- 9-fluorenyl)zirconium dichloride; phenyl-3-butenylmethylidene(η5-cycloρentadienyl)(η5-9-flu orenyl)- zirconium dichloride;

fluorenyl)zirconium dichloride; phenyl-4-ρentenylmethylidene(ή5-cyclopentadienyl)(η5-9-fl uorenyl)- zirconium dichloride; phenyl-4-pentenylmethylidene(η5-cyclopentadienyl)(η5-2,7-d i-t-butyl- 9-fluorenyl)zirconium dichloride; phenyl-5-hexenylmethylidene(η5-cyclopentadienyl)(η5-9-fluo renyl)- zirconium dichloride; , ' . phenyl-5-hexenylmethylidene(η5-cyclopentadienyl)(η5-2,7-di -r-butyl- 9-fluorenyl)zirconium dichloride; methyl-3-butenylsilylbis(η5-fluoren-9-yl)zirconium(IV) dichloride; methyl-4-pentenylsilylbis(η 5-flμoren-9-yl)zirconium(IV) dichloride; methyl-5-hexenylsilylbis(η5-fluoren-9-yl)zirconium(IV) dichloride; methyl-6-heptenylsilylbis(η5-fluoren-9-yl)zirconium(IV) dichloride; methyl-7-octenylsilylbis(η5-fluoren-9-yl)zirconium(IV) dichloride; or any combination thereof. In a further aspect of the present invention, the ansa-metallocene can comprise: . . • ••,'

The Organoaluminum Compound In one aspect, the present, invention provides a catalyst composition comprising an απsα-metallocene compound containing a pendant unsaturated moiety attached to the bridge, a solid oxide activator-support, and an organoaluminum compound. Organoaluminum compounds that can be used in this invention include, but are not limited to compound with the formula:

:yl5 Al(X5)n(X6)3-n, wherein (X5) is a hydrocarbyl having from 1 to 20 carbon atoms; (X6) is alkoxide or aryloxide, any of which, having from 1 to 20 carbon atoms, halide, or hydride; and n is a number from 1 to 3, inclusive. In one aspect, (X5) is an alkyl having from 1 to 10 carbon atoms. Examples of (X5) moieties include, but are not limited to, methyl, ethyl, propyl, butyl, hexyl, heptyl, octyl, and the like. In another aspect, examples of (X5) moieties include, but are not limited to, methyl, ethyl, isopropyl, n-propyl, n-butyl, sec-butyl, isobutyl, 1 -hexyl, 2-hexyl, 3 τhexyl, Isqhexyl, . heptyl, octyl, and the like. In another aspect, (X6) may be independently fluoride, chloride, bromide, methoxide, ethoxide, or hydride. In yet another aspect, (X6) may be chloride. In the formula Al(X5)n(X6)3-n, n is a number from 1 to 3 inclusive, and typically, n is 3. The value of n is not restricted to be an integer, therefore this formula includes sesquihalide compounds or other organoaluminum cluster compounds. . Generally, examples of organoaluminum compounds that can be used in this invention include, but are not limited to, trialkylaluminum compounds, dialkylaluminium halide compounds, dialkylaluminum alkoxide compounds, dialkylaluminum hydride compounds,, and combinations thereof. Examples of organoaluminum compounds that are useful in this invention include, but are not limited to: trimethylalumirium., triethylaluminum, tripropylaluminum, tributylaluminum, . triisόbutylaluminum, trihexylaluminum, triisohexylaluminum, trioctylaluminum, diethylaluminum ethoxide, diisobutylaluminum hydride, diethylaluminum chloride, or any combination thereof. ■ '. ' • "• ■ '"' ■ '■ ' In one aspect, the present invention comprises precontacting the ansa- metallocene with at least one organoaluminum compound and an olefin monomer to form a precontacted mixture, prior to contact this precontacted mixture with the solid oxide activatorfsupport to form the active catalyst. When the catalyst composition is prepared in this manner, typically, though not necessarily, a portion of the organoaluminum compound is added to the precontacted mixture and another portion of the organoaluminum compound is added to the postcoritacted mixture prepared when the precontacted mixture is contacted with the solid oxide activator. However, all of the organoaluminum compound may be used to prepare the. catalyst in either the precontacting or postcontacting step. Alternatively, all the catalyst components may be contacted in a single step. . . ., V. Further, more than, one organoaluminum compounds may be used, in either the precontacting or the postcontacting step. When an organoaluminum compound is added in multiple . steps, the amounts of organoaluminum compound disclosed herein include the total amount of organoaluminum compound used in both the. precontacted. and postcontacted mixtures, and any additional organoaluminum compound added to the polymerization reactor. Therefore, total amounts of organoaluminum compounds are disclosed, regardless of whether a single organoaluminum compound is used, or more than one organoaluminum compound. In another, aspect, triethylaluminum (TEA) or triisobutylaluminum are typical organoaluminum compounds used in this invention. . ' •.' .• ■'■ . . The Activator-Support In one aspect, the present invention encompasses catalyst compositions comprising an acidic activator-support, which can comprise a chemically- treated solid oxide, and which is.'.typically used in combination with an organoaluminum compound. In another aspect, the activator-support comprises at least one solid oxide treated with at least one electron- withdrawing anion; wherein the solid oxide can be silica, alumina, silica- alumina, aluminum phosphate, heterqpolytungstates, titania, zirconia, magnesia, boria, zinc oxide, mixed oxides thereof, or mixtures thereof; and wherein the electron- withdrawing anion- can be fluoride, chloride, bromide, phosphate, triflate, bisulfate, ...sulfate, fluoroborate, fluorosulfate, trifluoroacetate, fluorophosphates, fluorozirconate, fluorosilicate, fluorotitanate, permanganate, substituted sulfonate, unsubstituted sulfonate, or any combination thereof. The activator-support includes the contact product of at least one solid oxide compound and at least one electron-withdrawing anion source. In one aspect, the solid oxide compound comprises an inorganic oxide. The solid oxide can be optionally calcined prior to contacting the electron- withdrawing anion source. The contact product, may also be calcined either during or after the solid oxide compound is contacted with the electron-withdrawing anion source. In this aspect, the solid, oxide compound may be calcined or uncalcined. In another aspect, the activator-support may comprise the contact product of at least one calcined solid oxide compound and at least one electron- withdrawing anion source. The. activator-support exhibits enhanced activity as compared to the corresponding untreated solid oxide ..compound. The activator-support also functions as a catalyst activator as compared to the corresponding untreated solid oxide. While not intending to be bound by theory, it is believed that the activator-support may function as an ionizing solid oxide compound by weakening the metal-ligand bond between an anionic ligand and the metal in the' metallocene. However, the activator-support is an activator regardless of whether it is ionizes the metallocene,.. abstracts an anionic ligand to form an ion pair, weakens the metal-ligand bond in the metallocene, simply coordinates to an anionic ligand when it contacts the activator-support, or any other mechanisms by which activation may occur. While the activator-support activates the metallocene in. the absence of cocatalysts, it is not necessary to eliminate cocatalysts from the catalyst composition. The activation function of the activator-support is evident in the enhanced activity of catalyst composition as a whole, as compared to a catalyst composition containing the corresponding untreated solid oxide! However, it is believed that the activator-support can function as an activator, even in the absence of an organoaluminum compound, aluminoxanes, organoboron compounds, or ionizing ionic compounds. • , In one aspect, the activator-support of this invention comprises a solid inorganic oxide material, a mixed oxide material, or a. combination of inorganic oxide materials, that is chemically-treated with an electron- withdrawing component, and optionally treated with a metal. Thus, the solid oxide of this invention encompasses oxide materials such as alumina, "mixed oxide" compounds thereof such as - silica-alumina, and combinations and mixtures thereof. The mixed oxide compounds such as silica-alumina single chemical phases with more than one metal combined with oxygen to form a solid oxide compound, and are encompassed by this invention. In one aspect of this invention, the activator-support further comprises a metal or metal ion comprising zinc, nickel, vanadium, silver, copper, gallium, tin, tungsten, molybdenum, or any combination thereof. Examples of activator-supports that further comprise a metal or metal ion include, but are not limited to, zinc-impregnated . chlorided alumina, zinc-impregnated fluorided alumina, zinc-impregnated chlorided silica-alumina, zinc- impregnated fluorided silica-alumina^ zinc-impregnated sulfated alumina, or any combination thereof. . .. . In another aspect, the . activator-support of this invention comprises a solid oxide of relatively high porosity, which exhibits Lewis acidic or Brønsted acidic behavior. . The solid oxide is chemically-treated with an electron-withdrawing component, typically an electron-withdrawing anion, to form a activator-support. While not intending to.be bound by the following statement, it is believed that treatment of the inorganic oxide with an electron- withdrawing component augments or enhances the acidity of the oxide. Thus, the activator-support exhibits Lewis, or Brønsted acidity which is typically greater than the Lewis or Brønsted acidity of the untreated solid oxide. One method to quantify the acidity of the chemically-treated and untreated solid oxide materials is by comparing the polymerization activities of the treated and untreated oxides under acid catalyzed reactions. In one aspect, the chemically-treated solid oxide comprises a solid inorganic oxide comprising oxygen and at least one element comprising Group 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, or 15 of the periodic table, or comprising oxygen and at least one element comprising the lanthanide or actinide elements. (See: Hawley's Condensed Chemical Dictionary, 11th Ed., John Wiley & Sons .1995; Cotton, ''F. A.; Wilkinson, G.; Murillo; C. A.; and Bochmann; M. Advanced Inorganic Chemistry, 6th Ed., Wiley-Interscience, 1999.) Usually, the inorganic oxide comprises oxygen and at least one element comprising Al, B, Be, Bi, Cd, Co, Cr, Cu, Fe, Ga, La, Mn, Mo, Ni, Sb, Si, Sn, Sr, Th, Ti, V, W, P, Y, Zn or Zr. Suitable examples of. solid <kide materials or compounds that can be used in the chemically-treated solid oxide of the present invention include, but are not limited to, Al2O3, B2O3, BeO, Bi2O3, CdO, Co3O4, Cr2O3, CuO5 Fe2O3, Ga2O3, La2O3, Mn2O3, MoO3, ISIiO5 P2O5, Sb2O5, SiO2, SnO2, SrO, ThO2, TiO2, V2O5, WO3, Y2O3, ZnO, ZrO2, arid the like, including mixed oxides thereof, and combinations thereof. Example^ of: mixed oxides that can be used in the activator-support of the present invention include, but are not limited to, mixed oxides of any combination of Al, B, Be, Bi, Cd, Co, Cr, Cu, Fe, Ga, La, Mn, Mo, Ni, P, Sb, Si, Sn, Sr, Th, Ti, V5 W, Y, Zn, Zr, and the like. Examples of mixed oxides that can be used in the, activator-support of the present invention also include, but are. not limited to,. silica^alumina, silica-titania, silica- zirconia, zeolites, many clay minerals, pillared clays, alumina-titania, alumina- zirconia, and the like. . '

•■• :30: 2005/022849

In one aspect of this invention, the solid oxide material is chemically- treated by contacting it with at least one electron-withdrawing component, typically an electron-withdrawing anion source. Further, the solid oxide material is optionally chemically-treated with a metal ion, then calcining to form a metal-containing or metal-impregnated chemically-treated solid oxide. Alternatively, a solid oxide material and an electron-withdrawing anion source are contacted and calcined simultaneously. The method by which the oxide is contacted with an electron-withdrawing component, typically a salt or an acid of an electron-withdrawing anion,, includes, but is not limited to, gelling, co- gelling, impregnation of. one compound onto another, and the like. Typically, following any contacting method, the contacted mixture of oxide compound, electron- withdrawing anion, and optionally the metal ion is calcined. The electron-withdrawing component used to treat the oxide is any component that increases the Lewis of Brønsted acidity of the solid oxide upon treatment. In one aspect, the electronr.withdrawing component is an electron- withdrawing anion derived from a salt, an acid, or other compound such as a volatile organic compound that may serve as a source or precursor for that anion. Examples of electron-withdrawing anions include, but are not limited to, fluoride, chloride, bromide, iodide, 'phosphate, triflate, bisulfate, sulfate, fluoroborate, fluorosulfate, trifluόroacetate, ' phosphate, fluorophosphate, fluorozirconate, fluorosilicate, fluorotitanate, permanganate, substituted sulfonate, unsubstituted sulfonate, and the like, including any mixtures and combinations thereof, hi addition, other ionic or non-ionic compounds that serve as sources for these electron-withdrawing anions may also be employed in the present invention; In- one aspect, the chemically-treated solid oxide comprises a sulfated solid oxide, and. in another aspect, the chemically- treated oxide comprises sulfated alumina. • When the electron-withdrawing component comprises a salt of an electron-withdrawing anion, the counterion or cation of that salt may be any cation that allows the salt to revert, or decompose back to the acid during calcining. Factors that dictate the suitability of the particular salt to serve as a source for the electron-withdrawing, anion include, but are not limited to, the solubility of the salt in the. desired solvent, the lack of adverse reactivity of the cation, ion-pairing effects between, the cation and anion, hygroscopic properties imparted to the salt by the cation, and the like, and thermal stability of the anion. Examples of suitable, cations, in the salt of the electron- withdrawing anion include, but are. not limited to, ammonium, trialkyl ammonium, tetraalkyl ammonium, tetfaalkyl phosphonium, H+, [H(OEt2)2]+, and the like. Further, combinations of one. or more different electron withdrawing anions,, in varying proportions, can be. used to tailor the specific acidity of the activator-support to the desired level.. Combinations of electron withdrawing components may be contacted with the oxide material simultaneously or individually, and any order that affords the desired activator-support acidity. For example', one aspect of this invention is employing two or more electron- withdrawing anion source compounds in two or more separate contacting steps. Thus, one example of such a process by which an activator-support is prepared is as follows: a selected soiid oxide' compound, or combination of oxide compounds, is contacted with a first electron- withdrawing anion source compound to form a first mixture,, this first mixture is then calcined, the calcined first mixture is then contacted with a second electron-withdrawing anion source, compound to form a second mixture, followed by calcining said second mixture to form a treated solid oxide compound. In such a process, the first and second electron-withdrawing anion source compounds are typically different compounds, although they may be the same compound. In one aspect of the invention, the solid oxide activator-support is produced by a process comprising: ■ . 1) contacting a solid oxide compound with at least one electron- withdrawing anion source compound to. form a first mixture; and 2) calcining the first mixture to form the solid oxide activator-support. In another aspect of this invention, the solid oxide activator-support is produced by a process comprising: 1) contacting at least one solid oxide compound with a first electron- withdrawing anion source compourid to form a first mixture; and 2) calcining the first mixture to produce a calcined first mixture; 3) contacting the calcine.d first mixture with a second electron- withdrawing anion source compound to form a second mixture; and 4) calcining the second mixture to form the solid oxide activator- support. Thus, the solid oxide activator-support is sometimes referred to simply as a treated solid oxide compound. Another aspect of this invention producing or forming the solid oxide activator-support by contacting at. least one solid oxide with at least one electron-withdrawing anion source compound, wherein the at least one solid oxide compound is calcined before, during or after contacting the electron- withdrawing anion source, and wherein there is a substantial absence of aluminoxanes and organoborates. In one aspect of this invention, once the solid oxide has been treated and dried, may be subsequently calcined. Calcining of the treated solid oxide is generally conducted in an ambient atmosphere, typically in a dry ambient atmosphere, at a temperature from' 2000C to 9000C, and for a time of 1 minute to 100 hours. In another aspect, calcining is conducted at a temperature from 3000C to 8000C and in another aspect, calcining is conducted at a temperature from 40O0C to 7000C. In yet another aspect, calcining is conducted from 1 hour to . 50 hours, and in another aspect calcining is conducted, from 3 hours' to 20 hours. In still another aspect, calcining may be carried out from 1 to 10 hours at a temperature from 35O0C to 5500C. • ; '; : Further, any type of suitable ambient can be used during calcining. Generally, calcining is conducted in an oxidizing atmosphere, such as air. Alternatively, an inert atmosphere, such as nitrogen or argon, or a reducing atmosphere such as hydrogen or carbon monoxide, may be used. In another aspect of the invention, the solid oxide component used to prepare the chemically-treated solid oxide has a pore volume greater than 0.1 cc/g. In another aspect, the solid oxide component has a pore volume greater than 0.5 cc/g, and in yet another aspect, greater than 1.0 cc/g. In still another • 2 aspect, the solid oxide component has a. surface area from 100 to 1000 m Ig. In another aspect, solid oxide component has a surface area from 200 to 800 m /g, and in still another aspect, from 250 to 600 m /g. The solid oxide material may be treated with a source of halide ion or sulfate ion, or a combination of anions, and optionally treated with a metal ion, then calcined to provide the activator-support in the form of a particulate solid. In one aspect, the solid oxide material is treated with a source of sulfate, termed a sulfating agent, a source of chloride ion, termed a chloriding agent, a source of fluoride ion, termed a fluoriding agent, or a combination thereof, and calcined to provide the solid oxide activator. In another aspect, useful acidic activator-supports include, but are . not limited to: bromided alumina; chlorided alumina; fluorided. alumina; . sulfated alumina; bromided silica- alumina, chlorided silica-alumina; . fluorided silica-alumina; sulfated silica- alumina; bromided silica-zirconia, chlorided silica-zirconia; fluorided silica- zirconia; sulfated silica-zirconia; a pillared clay such as a pillared rήontmorillonite, optionally treated with fluoride, chloride, or sulfate; phosphated alumina, or other, alurninόphosphates, optionally treated with US2005/022849

sulfate, fluoride, or chloride; or any combination thereof. Further, any of the activator-supports may optionally be treated with a metal ion. In one aspect of this invention, the treated oxide activator-support comprises a fluorided solid oxide in the form of a particulate solid, thus a source of fluoride ion is added to. the' oxide by treatment with a fluoriding agent. In still another aspect, fluoride ion may be added to the oxide by forming a slurry of the oxide in a suitable solvent such as alcohol or water, including, but are not limited to, the, one to three carbon alcohols because of their volatility and low surface tension. Examples of fluoriding agents that can be used in this invention include, but .are not limited to, hydrofluoric acid (HF), ammonium fluoride (KH4F)J : ammonium bifluoride (NH4HF2), ammonium tetrafluoroborate (NH4BF4), ammonium silicofluoride (hexafluorosilicate) ((NH4)2SiF6), ammonium hexafluorophosphate (NH4PF6), analogs thereof, and combinations thereof. For example, ammonium bifluoride NH4HF2 may be used as the. fluoriding agent, due to its ease of use and ready availability. . . .. .■•• In another aspect of the present invention, the solid oxide can be treated with a fluoriding agent during the calcining step. Any fluoriding agent capable of thoroughly contacting the solid oxide, during the calcining step can be used. For example, in additipn. to those fluoriding agents described previously, volatile organic fluoriding . agents, may be used. Examples of volatile organic fluoriding agents useful in this aspect of the invention include, but are not limited to, frecins, perfluorohexane, perfluorobenzene, fluoromethane, trifluoroethahol, and combinations thereof. Gaseous hydrogen fluoride or fluorine itself can also be used with the solid oxide is fluorided during calcining. One convenient rnethod of contacting the solid oxide with the fluoriding agent is to vaporize a fluoriding agent into a gas stream used to fluidize the solid oxide during calcination.- Similarly, in another aspect of this invention, the chemically-treated solid oxide comprises a chlorided solid oxide in the form of a particulate solid, thus a source of chloride ion is added to the oxide by treatment with a chloriding agent. The chloride ion may be added to the oxide by forming a slurry of the oxide in a suitable solvent In ' another aspect of the present invention, the solid oxide can be treated with a chloriding agent during the calcining step. Any chloriding agent capable of serving as a source of chloride and thoroughly contacting the oxide during the calcining step can be used. For example, volatile organic chloriding agents may be used. Examples of volatile organic chloriding agents useful in this aspect of the invention include, but are not limited to, certain freons, perchlorobenzene, chloromethane, dichloromethane, chloroform, carbon tetrachloride, trichloroethanol, or any combination thereof. Gaseous hydrogen chloride or chlorine itself can also be used with the solid oxide during, calcining. One convenient method of contacting the oxide with the chloriding agent is to vaporize a chloriding agent into a gas stream used to fluidize the solid oxide during calcination. When the activator-support comprises a chemically-treated solid oxide comprising a solid oxide treated with an electron-withdrawing anion, the electron withdrawing anion can .be typically added to the solid oxide in an amount greater than 1% by. weight, of ;the.. solid oxide. In another aspect the electron withdrawing anion can be added to the solid oxide in an amount greater than 2% by weight of the solid oxide, greater than 3% by weight of the solid oxide, greater than 5% by weight of the solid oxide, or greater than 7% by weight of the solid, oxide. . In one aspect, the amount of electron-withdrawing ion, for example fluoride or chloride ion, present before calcining the solid oxide is generally from 2 to 50% by weight, where the. weight percents are based on the weight of the solid oxide, for example silica-alumina, before calcining. In another aspect, the amount of of electron-withdrawing ion, for example fluoride or chloride ion, present before calcining the solid oxide is from 3 to 25% by weight, and in another aspect, from 4. to 20% by weight. When halide ion is used as the electron-withdrawing anion, it. is used in an amount sufficient to deposit, after calcining, from 0.1% to- 50% by weight halide ion relative to the weight of the solid oxide. In another, aspect, halide is used in an amount sufficient to deposit, after calcining, from 0.5% to 40% by weight halide ion relative to the weight of the solid oxide, or from 1% to 30% by weight halide ion relative to the weight of. the solid oxide. If the fluoride or chloride ion is added during calcining, such as when calcined in the presence of CCl4, there is typically no, or only trace levels, of fluoride or chloride ion in the solid oxide before calcining. Once impregnated with halide, the halided oxide may be dried by any method known in the art including, but not limited to, suction filtration followed by evaporation,. drying under vacuum, spray drying, and the like, although it is also possible to initiate, the calcining step immediately without drying the impregnated, solid oxide. The silica-alumina used to prepare the treated silica-alumina can have a pore volume greater than 0.5 cc/g. In one aspect, the pore volume may be greater than .0.8 cc/g, and in another, aspect, the pore volume may be greater than 1.0 cc/g. Further, the silica-alumina may have a surface area greater than 100 m2/g. In one aspect, the surface area is greater than 250 m2/g, and in another aspect, the surface area may be greater than 350 m2/g. Generally, the silica-alumina of this invention has :an. alumina content from 5 to 95%. In one aspect, the alumina content of. the. silica-alumina may be from 5 to 50%, and in another aspect, the alumina content of the silica-alumina may be from 8% to 30% alumina by. weight The sulfated solid oxide comprises sulfate and a solid oxide component such as alumina or silica-alumina, in the form of a particulate solid. Optionally, the sulfated oxide is further treated with a metal ion such that the calcined sulfated oxide comprises a metal. In one aspect, the sulfated solid oxide comprises sulfate and. alumina. In one aspect of this invention, the sulfated alumina is formed by a process wherein the alumina is treated with a sulfate source,- for example , but- not limited to, sulfuric acid or a sulfate salt such as ammonium sulfate, zinc sulfate, aluminum sulfate, nickel sulfate or copper sulfate. In one aspect, this process may be performed by forming a slurry of the alumina in a suitable solvent such as alcohol or water, in which the desired concentration of the sulfating agent has been added. Suitable organic solvents include, but are 3JOt. limited to, the one to three carbon alcohols because of their volatility and low surface tension. In this aspect, the amount of sulfate ion present before calcining is generally from 1% to 50% by weight, from 2% to 30 % by weight, of from 5% to 25% by weight, where the weight percents are based on the weight of the solid oxide before calcining. Once, impregnated with sulfate, the sulfated oxide may be dried by any method known in the art including, but not limited to, suction filtration followed by evaporation, drying under vacuum, spray drying, and the like, although it is also possible to initiate the calcining step immeditately. . . . In addition to being treated with an electron-withdrawing component such as halide or sulfate ion, the solid inorganic oxide of this invention may optionally be treated with a metal source, including metal salts or metal- containing compounds. In. one aspect of the invention, these compounds may be added to or impregnated onto the solid oxide in solution form, and subsequently converted into the supported metal upon calcining. Accordingly, the solid inorganic oxide can further comprise a metal comprising zinc, nickel, vanadium, silver, copper, gallium, tin, tungsten, molybdenum, or a combination thereof. For example, zinc may be used to impregnate the solid oxide because it provides good catalyst activity and low cost. The solid oxide may be treated with metal salts or metal-containing compounds before, after, or at the same time that the solid oxide is treated with the electron- withdrawing anion. ■ . Further, any method of impregnating the solid oxide material with a metal may be used. The method by which the oxide is contacted with a metal source, typically a salt or metal-containing compound, includes, but is not limited to, gelling, co-gelling, impregnation of one compound onto another, and the like. Following any contacting method,, the contacted mixture of oxide compound, electron-withdrawing anion, and the metal ion is typically calcined. Alternatively, a solid oxide material, an electron-withdrawing anion source, and the metal salt or metal-containing compound are contacted and calcined simultaneously; . . In another aspect, the βnsα-metalloeene compound may be contacted with an olefin monomer and an organoaluminum cocatalyst for a first period of time prior to contacting this mixture with the acidic activator-support. Once the precontacted mixture of metallocene, monomer, organoaluminum cocatalyst is contacted with the . acidic activator-support, the composition further comprising the aeidic activator-su.pp.ort is termed the "postcontacted" mixture. The postcontacted. mixture may be allowed to remain in further contact for a second period of time prior to being charged into the reactor in which the polymerization process will be carried out. Various processes to prepare solid oxide activator-supports that can be employed in this invention have been reported. For example, U.S. Patent Nos. 6,107,230, 6,165,929, 6,294,494, 6;300,271, 6,316,553, 6,355,594, 6,376,415, 6,391,816, 6,395,666, 6,524,987, and 6,548,441, describe such methods, each ' of which is incorporated by reference herein, in its entirety.' Ion-Exchangeable Activator-Supports ' and Layered Mineral Activator- Supports In one aspect of this invention, the activator-support used in preparing the catalyst compositions of this invention can comprise an ion-exchangeable activator-support, including but not limited to silicate and aluminosilicate compounds or minerals, either with layered or non-layered structures, and any combination thereof; In another aspect of this invention, ion-exchangeable, layered aluminosilicates such as pillared clays may be used as activator- supports. When the acidic activator-support comprises an ion-exchangeable activator-support, it can optionally be . treated with at least one electron- withdrawing anion such as those disclosed herein, though typically the ion- exchangeable activator-support is not treated with an electron-withdrawing anion. In one aspect, the activator-support of this invention can comprise clay minerals having exchangeable cations and layers capable of expanding. Typical clay mineral activator-suppprts include, but are not limited to, ion- exchangeable, layered aluminosilicates such as pillared clays. Although the term "support" is used, it is not meant to be construed as an inert component of the catalyst composition,, but rather is to be considered an active part of the catalyst composition, because of its. intimate association with the ansa- metallocene and organoalμminum catalyst components. While not intending to be bound by theory, it is believed that the ion exchangeable activator- support serves as an insoluble reactant that reacts with the αnsα-metallocene and organoaluminum components to form a catalyst composition used to produce polymer. In one aspect, the clay materials of this invention encompass materials either in their natural state or that , have been treated with various ions by wetting, ion exchange, or. pillaring. Typically, the clay material activator- support of this invention comprises clays that have been ion exchanged with large cations, including polynuclear, highly charged metal complex cations. However, the clay material, activator-supports of this invention also encompass clays that have been ion exchanged, with simple salts, including, but not limited to, salts of Al(III), Fe(II), Fe(III) and Zn(II) with ligands such as halide, acetate, sulfate, nitrate, or nitrite:.; In one aspect, the. clay activator-support of this invention comprises pillared clays. The term pillared clays is used to refer to clay materials that have been ion exchanged with large, typically polynuclear, highly charged metal complex cations. Examples of such ions include, but are not limited to, Keggin ions which may have charges 'such as 1+,. various polyoxometallates, and other large ions. Thus, the term pillaring refers to a simple exchange reaction in which the exchangeable cations of a clay material are replaced with large, highly charged ions, such as Keggin ions. These polymeric cations are then immobilized within the interlayers of the clay and when calcined are coverted to metal oxide "pillars," -effectively supporting the clay layers as column-like structures. Thus, once the clay is dried and calcined to produce the supporting pillars between clay layers, the expanded lattice structure is maintained and the porosity is enhanced. The resulting pores may vary in shape and size as a . function of the pillaring material and the parent clay material used. Examples of pillaring and pillared clays are found in: T.J. Pinnavaia, Science 220 (4595), 365-371 (1983); J.M. Thomas, Intercalation Chemistry, (S. Whittington and A. Jacobson, eds.) Ch. 3, pp. 55-99, Academic Press, Inc., (1972); U.S. Patent No. 4,452,910; U.S. Patent No. 5,376,611; and U.S. Patent No. 4,060,480; each of which.is incorporated herein in its entirety. The pillaring process utilizes play minerals having exchangeable cations and .layers capable of expanding. Any pillared clay that can enhance the polymerization of. olefins in the catalyst composition of the present invention can be used. Therefore, suitable clay minerals for pillaring include, but are not limited to: allophanes;- smectites, both dioctahedral (Al) and tri- octahedral (Mg) and derivatives thereof such as montmorillonites (bentonites), nontronites, hectorites, or laponites; halloysites; vermiculites; micas; fluoromicas; chlorites; mixed-layer clays; the fiberous. clays including bμt not limited to sepiolites, attapulgites, and. paly gorskites; a serpentine clay; illite; laponite; saponite; or any combination thereof. In one aspect, the pillared clay activator-support comprises bentonite or montmorillonite. The principal component of bentonite is montmorillonite. The pillared clay may be . pretreated in the present invention. For example, in one embodiment,, a pillared bentonite was pretreated by drying at 300°C under an inert atmosphere, typically dry nitrogen, for 3 hours, before being added to the polymerization reactor. This example of a pretreament is not limiting, because preheating steps such as this many be carried out at many other temperatures and times, including a combination of temperature and time steps, all of which are encompassed.by, this invention. The ion-exchangeable activator-rsupports such as pillared clays used to prepare the catalyst compositions of this invention can be combined with other inorganic support materials, including, but are not limited to, zeolites, inorganic oxides, phosphated inorganic oxides, and the like. In one aspect, typical support materials that can be used in this regard include, but are not limited to, silica, silica-alumina, aluriϋna, titaήia, zirconia, magnesia, boria, fluorided alumina, silated alumina, thoria, aluminophosphate, aluminum phosphate, phosphated silica, phosphated alumina, silica-titania, coprecipitated silica/titania, fluorided/silated alumina, and any combination or mixture

in relation to the ion- exchangable activator-support used to prepare the catalyst composition of this invention is typically from 0.1 wt% to 15 wt% αnsα-metallocene complex, based on the weight of the activator-support component (not based on the final metallocene-clay mixture). It was also found that from 1 wt% to 10 wt% ατM<z-metallocene works well to .afford a catalyst that operates at desired activities. ■ ■ . The mixture of απsα-metallocene and clay activator-support can be contacted and mixed for any length of time to allow thorough contact between the αrøα-metallocene and activatorrsupport. Sufficient deposition of the metallocene component, on the clay r may be achieved without heating a mixture of clay and metallocene complex. For example, the αnsα-metallocene compound and the clay material are simply mixed from room temperature to 93.3°C (2000F) in order to achieve the depositition of the ansa-metallocene on the clay activator-support. In another aspect, the <msα-metallocene. compound and the clay material are mixed from 37.80C (1000F) to. 82.20C (18O0F) in order to achieve the depositition of the ansa-metallocGne on the clay activator- support. In another aspect, the present invention encompasses catalyst compositions comprising an acidic activator-support, which can comprise a layered mineral. The term "layered . mineral" is used herein to describe materials such as clay minerals, pillared clays, ion-exchanged clays, exfoliated clays, exfoliated clays gelled into another oxide matrix, layered minerals mixed or diluted with other materials, and the like, or any combination thereof. When the acidic activator-support, comprises a layered mineral, it can optionally be treated with at least one electron- withdrawing anion such as those disclosed herein, though typically the layered mineral is not treated with an electron-withdrawing anion. Forexample, at least one clay mineral can be used as the activator-support. Clay minerals generally include the large group of finely-crystalline, sheet-like layered minerals that are found in nature in fine-grained sediments, sedimentary rocks, and the like, and which constitute a class of hydrous silicate and aluminosilicate minerals with sheet-like structures and very high surface areas. This term is also used -to describe hydrous magnesium silicates with a phyllosilicate structure; Examples of clay minerals that can be used in this invention include, but are not limited to, allophanes; smectites, both dioctahedral (Al) and tri-octahedral (Mg) and derivatives thereof such as montmorillonites (bentonites), nontronites, hectoriteSj or laponites; halloysites; vermiculites; micas; fluoromicas; chlorites; mixed-layer clays; the fiberous clays including but not limited to sepiolites, attapulgites, and palygorskites; a serpentine clay; illite; laponite; saponite;. or any combination thereof. Many common clay minerals belong to the kaolinite, montmorillonite, or illite groups of clays. Pillared clays can also be used as the activator-support of this invention, as disclosed herein. Pillared claims comprise clay minerals, typically of the of the smectite group . and other phylosilicates in addition to sepiolites and palygorskites, that have been ion exchanged with large, typically polynuclear, highly charged metal complex cations. In one aspect of this invention, when layered minerals are used as activator-supports or metallocene activators, the layered minerals are typically calcined prior to their use as activators. Typical, calcination temperatures can range from 1000C to 7000C, from 15O0C to 5000C, or from 2000C to 4000C. .

Non-Limiting Examples of the Catalyst Composition Examples of the catalyst composition of this invention include, but are not limited to the following. In. one aspect, the catalyst composition can comprise, or can comprise the contact product of, at least one ansa- metallocene, at least one qrganoaluminum compound, and at least one activator-support, wherein: .; • a) the αrcsά^metallocene comprises: ■.

thereof; . ■ . b) the organoaluminum comprises triethylaluminum, triisobutylaluminum, or a combination thereof; and c) the activator-support comprises a sulfated solid oxide. In another aspect,, this invention provides a catalyst composition comprising the contact product of at least one αrøα-metallocene, at least one organoaluminum compound, and at least one activator-support, wherein: a) the αnsα-metallocene comprises: b) the organoaluminum - comprises triethylaluminurn, triisobutylaluminum, or a combination thereof; and c) the activator-support comprises sulfated alumina. In a further aspect, this invention provides a catalyst composition comprising at least one precontacted metallocene, at least one precontacted organoaluminum compound, at least one. precontacted olefin, and at least one postcontacted acidic activator-support,- wherein:, the precontacted metallocene has the general formula I:

wherein E is carbon, silicon, germanium,, or tin; R1 is phenyl or methyl; R2 is 3-butenyl (CH2CH2CH=CH2), 4-pentenyl (CH2CH2CH2CH=CH2), or 5- hexenyl (CH2CH2CH2CH2CH=CH2); and R3 is independently H or t-butyl; the precontacted organoaluminum compound is triisobutyl aluminum or triethyl aluminum; ' ., the precontacted olefin is ethylene or 1-hexene; and the postcontacted acidic activator-support comprises alumina which has been treated with sulfate ion, chloride ion, or fluoride ion; silica-alumina which has been treated with fluoride ion, or any combination thereof.

TJie Optional Aluminoxane Cocatalyst In one aspect, the present invention provides a catalyst composition comprising an αrcsα-metallocene compound containing a pendant unsaturated moiety, an activator-support, and an organoaluminum compound, as disclosed herein. In another aspect, the present invention provides a catalyst composition comprising an optional aluminoxane cocatalyst in addition to these other components. In still another aspect, the present invention provides a catalyst composition comprising ah αrøα-metallocene compound containing a pendant unsaturated moiety, an aluminoxane cocatalyst, an optional activator-support, and an optional organoaluminum compound. In another aspect, the.present.invention provides a catalyst composition comprising an αnsα-metallocene compound and an aluminoxane. In this aspect, the catalyst composition is not required to comprise either an acidic activator-support wherein the activator-support comprises a chemically-treated solid oxide, and the catalyst composition is also not .required to comprise an organoaluminum compound,. ThiiSj any αnsα-metallocene compounds disclosed herein can be combined with any of the aluminoxanes (poly(hydrocarbyl aluminum oxides)) disclosed herein, or any combination of aluminoxanes disclosed herein, to form a catalyst composition of this invention. . . . Aluminoxanes are also referred to: as poly(hydrocarbyl aluminum oxides) or organoaluminoxanes. The other catalyst components are typically contacted with the aluminoxane in a. saturated hydrocarbon compound solvent, though any solvent which is substantially inert to the reactants, intermediates, and products of the activation step can be used, The catalyst composition formed in this manner may be collected by methods known to those of skill in the art, including but not limited to filtration, or the catalyst composition. may be introduced into the polymerization reactor without being isolated. The aluminoxane compound of this invention is an oligomeric aluminum compound, wherein the. aluminoxane compound can comprise linear structures, cyclic, or cage structures, or typically mixtures of all three. Cyclic aluminoxane compounds having the formula:

R is a linear or branched alkyl having from 1 to 10 carbon atoms, and n is an integer from 3 to 10 are encompassed by this invention. The (AlRO)n moiety shown here also constitutes the repeating unit in a linear aluminoxane. Thus, linear aluminoxanes having the formula:

R is a linear or branched alkyl having from 1 to .10 carbon atoms, and n is an integer from 1 to 50, are also encompassed by this invention.. Further, aluminoxanes may also have cage structures of the formula Rt5/«+αRbm-αAl4wO3w, wherein m is. 3 or 4 and α is = nA1(3) - n0{2) + n0(4y, wherein /ϊAi(3) is the number of three coordinate aluminum atoms, nO(2) is the number of two coordinate oxygen atoms, «p(4) is the number of 4 coordinate oxygen atoms, R1 represents a terminal alkyl group, and Rb represents a bridging alkyl group; wherein R is a linear or branched alkyl having from 1 to 10 carbon atoms. Thus, aluminoxanes that can . serve as optional cocatalysts in this invention are generally represented .by. formulas such as (R-Al-O)n, R(R-Al- O)nAlR2, and the like, wherein the R group is typically a linear or branched C1- C6 alkyl such as methyl, ethyl, propyl, butyl, pentyl, or hexyl wherein n typically represents an integer from 1 to 50. In one embodiment, the aluminoxane compounds of this invention include, but are not limited to, methylaluminoxane, ethylaluminoxane, n-propylaluminoxane, iso-propyl- aluminoxane, n-butylaluminoxane, t-butylaluminoxane, sec-butylaluminoxane, iso-butylaluminoxane, 1-pentylalumiiioxane, 2-pentylaluminoxane, 3-penryl- aluminoxane, iso-pentylalumiήoxane, .neopentylaluminoxane, or combinations thereof. While organoaluminoxanes with different types of R groups are encompassed by the present invention, methyl aluminoxane (MAO), ethyl aluminoxane, or isobutyl aluminoxane are typical optional cocatalysts used in the catalyst compositions of this invention. These aluminoxanes are prepared from trimethylaluminum, triethylaluminum, or triisobutylaluminum, respectively, and are sometimes referred to as poly(methyl aluminum oxide), poly(ethyl aluminum oxide), and poly(isobutyl aluminum oxide), respectively. It is also within the scope of the invention to use an aluminoxane in combination with a trialkylalurmnύmj such as disclosed in U.S. Patent No. 4,794,096, which is herein incorporated by reference in its entirety. The present invention contemplates many values of n in the aluminoxane formulas (R-Al-O)n and R(R-Al-O)nAlR2, and typically n is at least 3. However, depending upon, how the organoaluminoxane is prepared, stored, and used, the value of n may. ;.be variable within . a single sample of aluminoxane, and such a combination of organoaluminoxanes are comprised in the methods and compositions of the present invention. In preparing the catalyst composition of this invention comprising an optional aluminoxane, the molar ratio of the aluminum in the alumixoane to the metallocene in. the composition is usually from 1:10 to 100,000:1. In one another aspect, the molar ratio- of the aluminum in the alumixoane to the metallocene in the composition is usually from 5:1 to 15,000:1. The amount of optional aluminoxane added to a polymerization zone is an amount within a range of 0.01 mg/L to 1000 mg/L, from 0.1 mg/L to 100 mg/L, or from 1 mg/L to 50 mg/L. Organoaluminoxanes can be prepared by various procedures which are well known in the art! Examples of organoalumϊnoxane preparations are disclosed in U.S. Patent Nos. 3,242,099 and; 4,808,561, each of which is incorporated by reference herein, in its entirety. One example of how an aluminoxane may be prepared is as follows. Water, which is dissolved in an inert organic solvent, may be reacted with an aluminum alkyl compound such as AlR3 to form the desired organoaluminoxane compound. While not intending to be bound by this stalerήent, it is believed that this synthetic method can afford a mixture of both linear and cyclic (R-Al-O)n aluminoxane species, both of which are encompassed by this invention. Alternatively, organoaluminoxanes may be prepared by . reacting an aluminum alkyl compound such as AlR3 with a hydrated salt, such as hydrated copper sulfate, in an inert organic solvent. .

The Optional Organoboron Cocatalyst In one aspect, the present invention provides a catalyst composition comprising an αnsα-metallocene compound containing a pendant unsaturated moiety, an activator-support, and an orgiffloaluminum compound, as disclosed herein. In another aspect, the present invention provides a catalyst composition comprising an. optional organoboron cocatalyst in addition to these other components. In still another aspect, the present invention provides a catalyst composition comprising an.αnsα-metallocene compound containing a pendant unsaturated moiety, an 'organoboron cocatalyst, an optional activator-support, and an optional orgarioaluminum compound. In another aspect, the present invention provides a catalyst composition comprising an αzwα-metallocene compound and an organoboron cocatalyst. In this aspect, the catalyst composition is not required to comprise either an acidic activator-support wherein the activator-support comprises a chemically- treated solid oxide, and the catalyst, composition is also not required to comprise an organoaluminum compound. Thus, any αnsfl-metallocene compounds disclosed herein can be combined with any of the organoboron cocatalysts disclosed herein, or any combination of organoboron cocatalysts disclosed herein, to form a catalyst composition of this invention. In one aspect, the organoboron, compound comprises neutral boron compounds, borate . salts, or combiiiations .thereof. For example, the organoboron compounds of this invention can comprise a fluoroorgano boron compound, a fluoroorgano borate compound, or a combination thereof. Any fluoroorgano boron or fluoroorgano. borate compound known in the art can be utilized. The term fluoroorgano boron compounds has its usual meaning to refer to neutral compounds of the form BY3. The term fluoroorgano borate compound also has its usual meaning to refer to the monoanionic salts of a fluoroorgano boron compound of the form [cation]+[BY4]', where Y represents a fluorinated organic group. For convenience, fluoroorgano boron and fluoroorgano borate compounds are • typically referred to collectively by organoboron compounds, Or by either .name as the context requires. Examples- of fluoroorgano ■ borate compounds that can be used as cocatalysts in the present invention include, but are not limited to, fluorinated aryl borates such as, N,N-dimethylaηilinium tetrakis(pentafluorophenyl)borate, triphenylcarbenium tetrakis(pentafluorophenyl)borate, . lithium tetrakis- (pentafluorophenyl)borate? N,N-dimethylanilinium tetrakis[3,5-bis(trifluoro- methyl)phenyl]borate, triphenylcarbenium tetrakisβ ,5-bis(trifluoromethyl)- phenyljborate, and the like, including mixtures thereof. Examples of fluoroorgano boron compounds that can be used as cocatalysts in the present invention include, but are not limited to, tris(pentafluorophenyl)boron, tris[3,5- bis(trifluoromethyl)phenyl]boron, and the like, including mixtures thereof. Although not intending to be bound by the following theory, these examples of fluoroorgano borate and fluoroorgano boron compounds, and 5 related compounds, are thought to form ''weakly-coordinating" anions when combined with organometal compounds, as disclosed in U.S. Patent 5,919,983, which is incorporated herein by reference in its entirety. Generally, any amount of organoboron compound can be utilized in this invention. In one aspect, the molar ratio of the organoboron compound to 10 the metallocene compound in the composition is from 0.1:1 to 10:1. Typically, the amount of the fluoroorgano boron or fluoroorgano borate compound used as a cocatalyst for the metallocene is in a range of from 0.5 mole to 10 moles of boron compound per mole of metallocene compound. In one aspect, the amount of fluoroorgano boron or fluoroorgano borate 15 compound used as a cocatalyst for -the, metallocene is. in a range of from Θ.8 mole to 5 moles of boron compound per mole of metallocene compound.

The Optional Ionizing Ionic Compound Cocatalyst In one aspect, the present invention provides a catalyst composition 20 comprising an αnsα-metallocene compound containing a pendant unsaturated moiety, an activator-support, and an otganoalurninum compound, as disclosed herein. In another aspect, the present invention provides a catalyst composition comprising an. optional ionizing ionic compound cocatalyst in addition to these other components. In still another aspect, the present 25 invention provides a catalyst composition comprising an <ms<z-metallocene compound containing a pendant, unsaturated moiety, an ionizing ionic compound cocatalyst, an optional activator-support, and an optional organoaluminum compound. Examples of ionizing ionic compound are

■ " ■ . ■ . . • ■ '■ -.;-:52' '- ' • disclosed in U.S. Patent Numbers 5,576,259 and 5,807,938, each of which is incorporated herein by reference, in its entirety. An ionizing ionic compound is an ionic compound which can function to enhance activity of the catalyst composition. While not bound by theory, it is believed that the ionizing ionic compound may be capable of reacting with the metallocene compound and converting the metallocene into a cationic metallocene compound. Again, while not intending to be bound by theory, it is believed that the ionizing ionic, compound may function as an ionizing compound by completely or partially extracting an anionic ligand, possibly a non-η5-alkadienyl ligand such as (X3) or (X4), from the metallocene. However, the ionizing ionic compound is an activator regardless of whether it is ionizes the metallocene, abstracts an (X3) or (X4) ligand in a fashion as to form an ion pair, weakens the metal-(X3) or metal-(X4) bond in the metallocene, simply coordinates tip : an (X3) ,or (X4) ligand, or any other mechanisms by which activation may occur. Further, it is not necessary that the ionizing ionic compound activate the metallocene only. The activation function of the ionizing ionic compound is evident in the enhanced activity of catalyst composition as a, whole, as compared to a catalyst composition containing catalyst composition that- does not comprise any ionizing ionic compound. Examples of. ionizing ionic compounds include, but are not limited to, the following compounds: tri(n-buryl)ammonium tetrakis(p-toryl)borate, tri(n- butyl) ammonium tetrakis(m-tolyl)borate, tri(n-butyl)ammonium tetrakis(2,4- dimethyl)borate, tri(n-butyl)ammonium tetrakis(3,5-dimethylphenyl)borate, tri(n-butyl)ammonium tetrakis[3,5-bis(trifluoromethyl)phenyl]borate, tri(n- butyl) ammonium tetrakis(pentafluorophenyl)borate, N,N-dimethylanilinium tetrakis(p-tolyl)borate, N,N-dimemylanilinium tetrakis(m-tolyl)borate, N,N- dimethylanilinium tetralds(2,4-dimethylphenyl)borate,.N,N-dimethylanilinium T/US2005/022849

tetrakis(3,5-dimethylphenyl)borate, N,N-dimethylanilinium tetrakis[3,5- bis(trifluoromemyl)phenyl]borate, . N,N-dimethylanilinium tetrakis(pentafluorophenyl)borate, triphenylcarbenium tetrakis(p-tolyl)borate, triphenylcarbenium tetrakis(m-toly/l)bόrate, triphenylcarbenium tetrakis(2,4- dimethylphenyl)borate, triphenylcarbenium tetrakis(3,5- dimethylρhenyl)borate, triphenylcarbenium tetrakis[3 ,5-bis(trifluoro- methyl)phenyl]borate, triphenylcarbenium tetrakis(pentafluorophenyl)borate, tropylium tetrakis(p-tolyl)borate, tropylium tetrakis(m-tolyl)borate, tropylium tetralάs(2,4-dimethylρhenyl)borate, •■■■ tropylium tetrakis(3,5- dimethylρhenyl)borate, tropylium tetrakis[3,5-bis(trifluoromethyl)phenyl]borate, tropylium tetrakis(pentafluorophenyl)borate, lithium tetrakis(pentafluorophenyl)borate, lithium tetrakis(phenyl)bprate, lithium tetrakis(p-tolyl)borate, lithium tetrakis(m-tolyl)borate, lithium. tetrakis(2,4-dimethylphenyl)borate, lithium tetrakis(3,5-dimethylphenyl)borate, lithium tetrafluoroborate, sodium tetrakis(pentafluorophenyl)borate, sodium tetrakis(phenyl). borate, sodium tetralds(p-tolyl)borate, sodium tetrakis(m-tolyl)borate, sodium tetrakis(2,4- dimethylphenyl)borate, sodium tetrakis(3,5-dimethylphenyl)borate, sodium tetrafluoroborate, potassium tetraldis(pentaflύorophenyl)borate, potassium tetrakis(phenyl)borate, potassium tetrakis(p-tolyl)borate, potassium tetrakis(m- tolyl)borate, potassium tetrakis(2,4-dimethylphenyl)borate, potassium tetrakis(3,5-dimethylρhenyl)borate, potassium tetrafluoroborate, tri(n- butyl)ammonium tetrakis(p-tolyl)aluminate, tri(n-butyl)ammonium tetrakis(m- tolyl)aluminate, tri(n-butyl)ammonium! tetrakis(2,4-dimethyl)aluminate, tri(n- butyl)ammonium tetrakis(3,5-dimethylphenyl)aluminate, tri(n- butyl)ammonium tetrakis(pentafluorophenyl)aluminate, N5N- dimethylanilinium tetrakis(p-tolyl)aluminate, N,N-dimethylanilinium tetrakis(m-tolyl)aluminate, . N,N-dimethylanilinium tetrakis(2,4- dimethylphenyl)aluminate, . N,N-dirnethylaήilinium tetrakis(3,5-dimethyl- 2005/022849

phenyl)aluminate, N,N-dimethylanilinium tetrakis (pentafluorophenyl)aluminate, triphehylcarbenium tetrakis(p-tolyl)aluminate, triphenylcarbenium tetrakis(m-tolyl)aluminate, triphenylcarbenium tetralάs(2,4-dimemylρhenyl)aluminate, ' triphenylcarbenium tetrakis(3,5- dimethylphenyl)aluminate, triphenylcarbenium tetrakis- (pentafluorophenyl)aluminate, tropyliufn tetrakis(p-tolyl)aluminate, tropylium tetrakis(m-tolyl)aluminate, tropylium tetrakis(2,4-dimethylphenyl)aluminate, tropylium tetrakis(3j5-dimethylphenyl)aluminate, tropylium tetrakis(pentafluorophenyl)aluminate, . . lithium tetrakis(ρentafluorophenyl)alύminate, lithium tetrakis(phenyl)aluminate, lithium tetrakis(p-tolyl)aluminate, lithium tetrakis(m-tolyl)aluminate, lithium tetrakis(2,4-dimethylphenyl)aluminate, lithium tetrakis(3,5- dimethylphenyl)aluminate, lithium tetrafluoroaluminate, sodium tetrakis(pentafluorophenyl)aluminate, sodium tetrakis(phenyl)aluminate, sodium tetrakis(p-tolyl)aluminate, sodium tetrakis(m-tolyl)aluminate, sodium tetrakis(2,4-dimethylphenyl)aluminate,. sodium tetrakis(3,5- dimethylphenyl)aluminate, sodium. tetrafluoroaluminate, potassium tetrakis(pentafluorophenyl)aluminate,. - potassium tetrakis(phenyl)aluminate5 potassium tetrakis(p-tolyl)aluminate, potassium tetrakis(m-tolyl)aluminate, potassium tetrakis(2,4-dimethylphenyl)aluminate, potassium tetrakis (3,5- dimethylphenyl)aluminate, potassium tetrafluoroaluminate, However, the ionizing ionic compound is not limited thereto in the present invention.

The Olefin Monomer ' ■ • In one aspect, the present invention encompasses a polymerization catalyst composition comprising a tightly-bridged αnsα-metallocene compound containing a chain with a pendant olefin attached to the bridge, a solid oxide activator-support, and.an ofganoaluminum compound. Unsaturated reactants. that are tjseful in the polymerization processes with catalyst compositions and processes of this invention include olefin compounds having from 2 to 30' carbon atoms per molecule and having at least one olefmic double bond. This invention encompasses homopolymerization processes using a single olefin such as ethylene or propylene, as well as copolymerization reactions with at least one different olefmic compound. In one aspect. of a copolymerization reaction of ethylene, copolymers of ethylene comprise a major amount of ethylene (>50 mole percent) and a minor amount of comonomer <50 mole percent), though this is not a requirement. The comonomers that can be copolymerized with ethylene should have from three to 20 carbon, atoms in their molecular chain. Acyclic, cyclic, polycyclic, terminal (α), internal, linear, branched, substituted, unsubstituted, functionalized, and non-functionalized olefins may be employed in this invention. For example, typical unsaturated compounds that may be polymerized with the. catalysts of this invention include, but are not limited to, propylene, 1-butene, -2rbutene, 3 -methyl- 1-butene, isobutylene, 1-ρentene, 2-pentene, 3 -^methyl- 1-pentene, 4-methyl-l-pentene, 1-hexene, 2- hexene, 3-hexene, 3-ethyl-l-hexene, 1-heptene, 2-heptene, 3-heptene, the four normal octenes, the four normal nonenes, the five normal decenes, and mixtures of any two or more thereof. . Cyclic and bicyclic olefins, including but not limited to, cyclopentene, c.yclohexene, norbornylene, norbornadiene, and the like, may also be polymerized as described above. In one aspect, when a copolymer is desired, the monomer ethylene may be copolymerized with a comonomer. In another aspect, examples of the comonomer include, but are not limited to, propylene, 1-butene, 2-butene, 3- methyl- 1-butene, isobutylene, 1-peritene, 2-pentene, 3-methyl-l-pentene, 4- methyl-1-pentene, 1-hexene, 2-hexenέj '3 -hexerie, 3-ethyl-l-hexene, 1-heptene, 2-heptene, 3-heptene, the four normal octenes, the four normal nonenes, or the five normal decenes. In another aspect, the comonomer may be 1-butene, 1- pentene, 1-hexene, 1-octene, 1-decene, or styrene. In one aspect, the amount of comonomer introduced into a reactor zone to produce the copolymer is generally from 0.01 to 10 weight percent comonomer based on the total weight, of the monomer and comonomer. In another aspect, the amount of comonomer introduced into a reactor zone is from 0.01 to 5 weight percent comonomer, and in still another aspect, from 0.1 to 4 weight percent comonomer based on the total weight of the monomer and comonomer. Alternatively, an amount sufficient to give the above described concentrations by weight, in the copolymer produced can be used. While not intending to be bound by this theory, in the event that branched, substituted, or functionalized olefins are used as reactants, it is believed that steric hindrance may impede and/or slow the polymerization process. Thus, branched and/or, cyclic portion(s) of the olefin removed somewhat from the carbon-carbon double bond would not be expected to hinder the reaction in the way that. the same olefin substituents situated more proximate to the carbon-carbon double bond might. In one aspect, at least one reactant for the catalyst compositions of this invention is ethylene, so the polymerizations are either homopolymerizations or copolymerizations with a different acyclic, cyclic, terminal, . internal, linear, branched, substituted, or unsubstituted olefin. In addition, the. catalyst compositions of this invention may be used in polymerization of diolefin compounds, including but are not limited to, 1,3-butadiene, isoprene, 1,4-pentadiene, and 1,5-hexadiene.

Preparation of the Catalyst Composition This invention encompasses • a catalyst composition and method comprising the contact product of an αrcsα-metallocene, a solid oxide activator-support, and an organoaluminum compound. In one aspect of this invention, the α/wα-metallocene is precontacted with an olefmic monomer, not necessarily the olefin monomer to be polymerized, and an organoaluminum cocatalyst for a first period of time prior to contacting this precontacted mixture with the solid oxide activator-support. In one aspect, the first period of time for contact, the precontact time, between the α/wα-metallocene, the olefinic monomer, and the organoaluminum cocatalyst typically range from time 1 minute . to 24 hours, and from 0.1 to 1 hour is typical. Precontact times from 10 minutes to 30 minutes are also typical. Once the precontacted mixture of αnsα-metallocene, olefin monomer, and organoaluminum cocatalyst is contacted with the solid oxide activator, this composition (further comprising the ' solid oxide activator) is termed the postcontacted mixture. Typically, the postcontacted mixture may be allowed to remain in contact for a second period of time, the postcontact time, prior to being initiating the polymerization process. In one aspect, postcontact times between the solid oxide activator-support and the precontacted mixture typically range from time 1. minute, to 24 hours, and from 0.1 to 1 hour is typical. Postcontact times from 10 minutes to 30 minutes are also typical. In another aspect of this invention, the various catalyst components (for example, ansa-metallocene, activator-support, organoaluminum cocatalyst, and optionally an unsaturated hydrocarbon) can be contacted in the polymerization reactor simultaneously;:, while, the polymerization reaction is proceeding. Alternatively, any two or more of these catalyst, components may be "precontacted" in a vessel or tube prior to their entering the reaction zone. This precontacting step can be continuous process, in which the precontacted product is fed continuously to the reactor, or it can be a stepwise or batchwise process in which a batch of precontacted product can be added to make a catalyst composition. This precontacting step can be carried out over a time period that can range from a few seconds to as much as several days, or longer. In this aspect, the continuous precontacting step can last typically from 1 second to 1 hour. Also in this aspect, the continuous precontacting step can last typically from 10 seconds to 45 minutes, or from 1 minute to 30 minutes. Alternatively the precontacting, process can be carried out in multiple steps, rather than a single step, in; which multiple mixtures are prepared, each comprising a different set of catalyst components. For example, at least two catalyst components can be contacted, forming a first mixture, followed by contacting the first mixture with at least one other catalyst component forming a second mixture, and so forth. ' '. V - Multiple precontacting steps can be carried out in a single vessel or in multiple vessels. Further, multiple precontacting steps can be carried out in series (sequentially), in parallel, or a combination thereof. For example, a first mixture of two catalyst components, can be formed in a first vessel, a second mixture comprising the first mixture plus one additional catalyst component can be formed in the first vessel or in a second vessel, which is typically placed downstream of the first vessel In another aspect, one or more of the catalyst components may be split and used in different precontacting treatments. For. example, part of a catalyst component can be fed into a first precontacting vessel for precontacting with at least one other catalyst component, while the remainder of that same catalyst component can be fed into a second precontacting vessel for precontacting with at least one other catalyst component, or can be fed directly into the reactor, or a combination thereof The precontacting may be carried out in any suitable equipment, such as tanks,, stirred mix tanks, various static mixing devices, a tube, a flask, a vessel of any type, or any combination thereof. In one aspect, for example, a catalyst composition of this invention is prepared by contacting 1-hexene, triethylaluminum, and a zirconium ansa- metallocene such as phenyl-4-pentenylmethylidene(η5-cyclopentadienyl)(η5- 9-fluorenyl)zirconium dichloride for at least 30 minutes, followed by contacting this precontacted mixture with a sulfated alumina activator-support for at least 10 minutes up to one hour to, form the active catalyst. The precontacting step typically increases the productivity of the polymer as compared to the same catalyst composition that is prepared without this precontacting step. The enhanced activity catalyst composition of this invention can be used for homopolymerization of an α-olefϊn monomer such as ethylene or copolymerization of an. α-όlefin and a comonomer. However, neither a precontacting step nor a postcontactirig step are required for this invention. . . The postcontacted mixture may be heated at a temperature and for a duration sufficient to allow adsorption, impregnation, or interaction of precontacted mixture and the solid oxide activator-support, such that a portion of the components of the precontacted mixture is immobilized, adsorbed, or deposited thereon. For example,, the postcontacted mixture may be heated from between -17.8°C (O0F) to 65.5°C (15O0F). Temperatures between 4.4°C (400F) to 35°C (95°F) are typical if the mixture is heated at all. . In one aspect, the molar ratio of the ansa-metalϊocene compound to the organoaluminum compound may be from 1 :1 to 1 :10,000. In another aspect, the molar ratio of the ansa-metallocene compound to the organoaluminum compound may be from 1:1 to 1:1,000, and in another aspect, from 1 :1 to 1 :100. These molar ratios reflect the. ratio of αwsα-metallocene compound to the total amount of organoalumitiύm, compound in both the precontacted mixture and the postcontacted mixture combined. When a precontacting step is used, generally, the molar ratio of olefin monomer to αrcsα-metallocene compound in the precontacted mixture may be from l rlO to 100,000:1, or from 10:1 to 1,000:1. In another aspect of this invention, the weight ratio of the solid oxide activator to the organoaluminum compound may range from 1:5 to 1,000:1. In another aspect, the weight ratio of the solid oxide activator to the organoaluminum compound may be from 1:3 to 100:1, and in yet another aspect, from 1:1 to 50:1. In a further aspect of this invention, the weight ratio of the ansa- metallocene to solid oxide activator-support may be from 1:1 to 1 :1,000,000. Yet another aspect of this invention iis the weight ratio of the αrasα-metallocene to solid oxide activator-support which may be from 1 : 10 to 1:100,000, and in another aspect, from 1:20 to 1:1000. One aspect of this invention is that aluminoxane is not required to form the catalyst composition disclosed herein, a feature that allows lower polymer production costs. Accordingly, in one aspect, the present invention can use AlR3-type organoaluminum compounds and' an activator-support in the absence of aluminoxanes. While not intending to be bound by theory, it is believed that the organoaluminum compounds likely do not activate the metallocene catalyst in the same manner as an organoaluminoxane. Additionally, no expensive borate compounds or MgCl2 are required to form the catalyst composition of this, invention, although aluminoxane, borate compounds, MgCl2, or any combination thereof can optionally be used in the catalyst composition of this invention.. Further, in one aspect, cocatalysts such as aluminoxanes, organoboron compounds, ionizing ionic compounds, or any combination thereof may be used as cocatalysts with the αnsα-metallocene, either in the presence or in the absence; of the activator-support, and either in the presence or in the absence of the organoaluminum compounds. Thus, in one aspect, this invention provides a process to produce a catalyst composition, comprising: • :. contacting an αnsα-metallocene, an olefin, and an organoaluminum compound for a first period of time to form a precontacted mixture comprising a precontaeted <msα-metallocene, a precontacted organoaluminum compound, and a precontacted olefin; and contacting the precontacted mixture with an activator-support and optionally additional organoaluminum compound for a second period of time to form a postcontacted mixture comprising a postcontacted ansa- metallocene, a postcontacted organoaluminum compound, a postcontacted olefin, and a postcontacted activator-support. In this aspect, the precontacted αrcsα-metallocene can comprise a compound with the formula: (X'XX^XX^M1, wherein M1 is titanium, zirconium, or hafnium; (X1) and (X2) are independently a cyclopentadienyl, an indenyl, a fluorenyl, or a substituted analog thereof; ' (X1) and (X2) are ..connected by a substituted bridging group comprising one atom bonded to both (X1) and (X2) carbon, silicon, germanium, or tin; wherein one substituent of the substituted bridging group comprises an unsaturated group comprising an alkenyl group, an alkynyl group, an alkadienyl group, or a substituted analog thereof, any of which having from 1 to 20 carbon atoms;, and- . . • any additional substituent on the substituted bridging group; any substituent on the substituted alkenyl, substituted alkynyl, or substituted alkadienyl group bonded to the bridging group; any substituent on (X1) and (X2); and (X3) and (X4) are independently an aliphatic group, an aromatic group, a cyclic group, a combination .of aliphatic and cyclic groups, an oxygen group, a sulfur group, a nitrogen group, a phosphorus group, an arsenic group, a carbon group, a silicon group, a germanium group, a tin group, a lead group, a boron group, an aluminum group, an inorganic group, an organometallic group, or a substituted derivative thereof, any of which having from 1 to 20 carbon atoms; ahalide; or hydrogen. : In one aspect, the catalyst activity of the catalyst of this invention is typically greater than or equal to 100 grams polyethylene per gram of chemically treated solid oxide per hour (abbreviated gP/(gCTSOhr)). In another aspect, the catalyst of this invention may be characterized by an activity of greater than or equal to 250 gP/(gCTSO-hr), and in another aspect, an activity of greater than or equal to 500 gP/(gCTSO-hr). In still another aspect, the catalyst of this invention .may be. characterized by an activity of greater than or equal to 1000 gP/(gCTSO-rir), and in another aspect, an activity of greater than or equal to 2000 gP/(gCTSO-hr). This activity is measured under slurry polymerization conditions, using isobutane as the diluent, and with a polymerization temperature of 90 0C, and an ethylene pressure of 37.9 bar (550 psig). The reactor should have substantially no indication of any wall scale, coating oϊ other forms of fouling upon making these measurements.

Utility of the Catalyst Composition in Polymerization Processes Polymerizations using the catalysts of this invention can be carried out in any manner known in the art. Such polymerization processes include, but are not limited to slurry polymerizations, gas phase polymerizations, solution polymerizations, and the like, including multi-reactor combinations thereof. Thus, any polymerization zone known in the art to produce ethylene- containing polymers, can be utilized... For example, a stirred reactor can be utilized for a batch process, or the reaction can be carried out continuously in a loop reactor or in a continuous stirred reactor. After catalyst activation, a catalyst composition is used to homopolymerize ethylene, or copolymerize ethylene with a comonomer. In one aspect, a typical polymerization method is a slurry polymerization process (also known as the particle form process), which is well known in the art and is disclosed, for example in U.S. Patent No. 3,248,179, which is incorporated by reference herein, in its entirety! Other polymerization methods of the present invention for slurry processes are those employing a loop reactor of the

: v.6a type disclosed in U.S. Patent No. 3,248,179, and those utilized in a plurality of stirred reactors either in series, parallel, or combinations thereof, wherein the reaction conditions are different in the different reactors, which is also incorporated by reference herein, in. its entirety. ' In one aspect, polymerization temperature for this invention may range from 600C to 28O0C, and in another aspect, polymerization reaction temperature may range from 7O0C to 11O0C. The polymerization reaction, typically occurs in an inert atmosphere, that is, in atmosphere substantial . free of oxygen and under substantially anhydrous conditions, thus, in the absence of water as the reaction begins. Therefore a dry, inert atmosphere, for example, dry nitrogen or dry argon, is typically employed in the polymerization reactor. The polymerization reaction pressure can be any pressure that does not terminate the polymerization reaction,; and it typically conducted at a pressure higher than the pretreatment. pressures. In one aspect, polymerization pressures may be from atmospheric pressure to 68.95 bar (1000 psig). In another aspect, polymerization pressures may be from 3.45 bar (50 psig) to 55.16 bar (800 psig). Further, hydrogen can be used in the polymerization process of this invention to control p.olyrjtier molecular weight. Polymerizations using the catalysts of this invention can be carried out in any manner known in the art. Such processes that can polymerize monomers into polymers include, but are not limited to slurry polymerizations, gas phase polymerizations, solution . polymerizations, and multi-reactor combinations thereof; Thus, any polymerization zone known in the art to produce olefin-containing polymers can be utilized. For example, a stirred reactor can be utilized for a batch process, or the reaction can be carried out continuously in a loop reactor or in, a continuous stirred reactor. Typically, the polymerizations disclosed- herein are carried out using a slurry polymerization process in a loop reaction zone. . Suitable diluents used in slurry polymerization are well known in the art and include hydrocarbons which are liquid under reaction conditions. The term "diluent" as'used in this disclosure does not necessarily mean an inert material, as this term is meant to include compounds and compositions that may contribute to polymerization process. Examples of hydrocarbons that can be used as diluents include, but are not limited to, cyclohexane, isobutane, n-butane, propane, n-pentane, isopentane, neopentane, and n-hexane. Typically-: : isobutane is used as the diluent in a slurry polymerization. Examples of this technology are found in U.S. Patent Nos. 4,424,341; 4,501,885; 4,613,484; 4,737,280; and 5,597,892; each of which is incorporated by reference herein, in its entirety. For purposes of the invention, the term polymerization reactor includes any polymerization reactor or polymerization, reactor system known in the art that is capable of polymerizing olefin monomers to produce homopolymers or copolymers of the present invention. Such reactors can comprise slurry reactors, gas-phase reactors, solution reactors, or any combination thereof. Gas phase reactors can comprise . fluidized bed reactors or tubular reactors. Slurry reactors can comprise vertical loops or . horizontal loops. Solution reactors can comprise stirred tank or autoclave reactors. Polymerization reactors suitable for the present invention can comprise at least one raw material feed system, at least one feed. system for catalyst or catalyst components, at least one reactor system, at least one polymer recovery system or any suitable combination thereof. Suitable reactors for the present invention can further comprise any, or combination of, a catalyst storage system, an extrusion system, a cooling system, a diluent recycling system, or a control system. Such reactors can comprise continuous take-off and direct recycling of catalyst, diluent, and polymer. Generally, continuous processes can comprise the continuous introduction of a monomer, . a catalyst, and a diluent into a polymerization reactor and the continuous removal from this reactor of a suspension comprising polymer particles and the diluent; Polymerization reactor systems of the present invention can comprise one type of reactor per system or multiple reactor systems comprising two or more types of reactors operated in parallel or in series. Multiple reactor systems can comprise reactors connected together to perform polymerization, or reactors that are not connected. The polymer can be polymerized in one reactor under one set of conditions, and then the polymer can be transferred to a second reactor for polymerization under a different set of conditions. In one aspect of the invention, the polymerization reactor system can comprise at least one loop slurry reactor. Such reactors are known in the art and can comprise vertical or horizontal, loops. Such loops can comprise a single loop or a series of loops. Multiple loop reactors can comprise both vertical and horizontal loops. The. slurry. polymerization can be performed in an organic solvent that can disperse the catalyst and polymer. Examples of suitable solvents include butane, hexane, cyclohexane, octane, and isobutane. Monomer, solvent, catalyst and. any cόmonomer are continuously fed to a loop reactor where polymerization occurs; ' Polymerization can occur at low temperatures and pressures. Reactor effluent can be flashed to remove the solid resin. ; In yet another aspect of this invention, the polymerization reactor can comprise at least one gas. phase reactor. Such systems can employ a continuous recycle stream containing, one or more monomers continuously cycled through the fluidized bed in the presence of the catalyst under polymerization conditions. The recycle stream can be withdrawn from the fluidized bed and recycled back into the reactor. Simultaneously, polymer product can be withdrawn from the reactor and new or fresh monomer can be added to replace the polymerized . monomer. Such gas phase reactors can comprise a process for multi-step gas-phase polymerization of olefins, in which olefins are polymerized in the -gaseous phase in at least two independent gas-phase polymerization zones while feeding a catalyst-containing polymer formed in a first polymerization zone to a second polymerization zone. In still another aspect of the invention, the polymerization reactor can comprise a tubular reactor. Tubular reactors can make polymers by free radical initiation, or by employing the catalysts typically used for coordination polymerization. Tubular reactors can have several zones where fresh monomer, initiators, or catalysts are added. Monomer can be entrained in an inert gaseous stream and introduced . at one zone of the reactor. Initiators, catalysts, and/or catalyst, components can be entrained in a gaseous stream and introduced at another zone of the reactor. The gas streams are intermixed for polymerization. Heat and pressure can be employed appropriately to obtain optimal polymerization reaction conditions. In another aspect of the invention, the polymerization reactor can comprise a solution polymerization reactor. During solution polymerization, the monomer is contacted with the catalyst composition by suitable stirring or other means. A carrier comprising an inert organic diluent or excess monomer can be employed. If desired, the monomer can be brought in the vapor phase into contact with the catalytic reaction product, in the presence or absence of liquid material. The polymerization zone is maintained at temperatures and pressμres that will result in the formation ..of a solution of the polymer in a reaction medium. Agitation can be employed during polymerization to obtain better temperature control and to maintain uniform polymerization mixtures throughout the polymerization zone. Adequate means are utilized for dissipating the exothermic heat of polymerization. The polymerization can be effected in a batch manner, or in. a. continuous .manner. The reactor can comprise a series of at least one separator that employs high pressure and low pressure to separate the desired polymer. In a further aspect of the invention, the polymerization reactor system can comprise the combination of two or more reactors. Production of polymers in multiple reactors can include several stages in at least two separate polymerization reactors interconnected by a transfer device making it possible to transfer the polymers resulting from the first polymerization reactor into the second reactor. The desired polymerization conditions in one of the reactors can be different from the operating conditions of the other reactors. Alternatively, polymerization in multiple reactors can include the manual transfer of polymer from one reactor to subsequent reactors for continued polymerization. Such reactors can include any combination including, but not limited to, multiple loop reactors, multiple gas reactors, a combination of loop and gas reactors, a combination of autoclave reactors or solution reactors with gas or loop reactors, multiple solution reactors, or multiple autoclave reactors. After the polymers are produced, they can be formed into various articles, including but not limited to* household containers, utensils, film products, drums, fuel tanks, pipes, geomembranes, and liners. Various processes can form these articles. Usually, additives and modifiers are added to the polymer in order to provide desired effects. By using the invention described herein, articles can likely .be produced at a lower cost, while maintaining most or all of the unique, properties of polymers produced with metallocene catalysts. .: ; .

Ethylene Polymers Prepared According to this Invention In one aspect, . the ethylene, polymer produced using the catalyst composition of this invention may be characterized by lower levels of long chain branching (LCB) than are typically Observed when using ansa- metallocene catalysts without a pendant unsaturated moiety attached to the bridge, or when using supports other than the solid oxide activator-supports of this invention. Figures 2 through 4 illustrate various aspects of olefin homopolymer produced according to this invention. Figure 2 demonstrates a comparison of gel-permeation chromatography (GPC) runs for the polymers produced according to Examples 5-9, indicated as E.5 through E.9 in Figure 2, of this invention. This Figure demonstrates that the polymer's molecular weight distribution (Mw/Mn) can be decreased using the catalysts and methods of this invention. These data suggest that the presence of a pendant olefin on the metallocene structure (contrast Examples 5, 8, and 9 with Example 6 and Example 7) and the solid-oxide type (contrast Example 6 with Example 7; contrast Examples 5 and 9 with Example 8) affect LCB reduction. As demonstrated in Figure 2, the lowest level of LCB was obtained when an αnsα-metallocene was used in combination with a sulfated solid oxide activator-support, as in Example 6 in Figure 2. When the ansa-metailocene contained no pendant olefin and. the. fluorided solid oxide activator-support was used, the highest level of LCB was produced, as in Example 8 in Figure 2. This LCB manifested itself in some broadening of the molecular weight distribution (MWD) profile, as seen in Figure 2. The combination of size . exclusion chromatography (SEC) and multiangle light scattering . (MALS) V - detection was used to detect and characterize polymer branching, As illustrated in Figure 3, a diagram obtained from SEC-MALS analysis plotting the radius of gyration (Rg), one measurement of molecular size, versus Mw, of the ethylene homopolymer produced in Examples 5-9,. demonstrates one aspect of the invention's utility in reducing LCB. Deviation of the radius of gyration (Rg) from a known linear control (in this instance, HΪD9640) indicates branching. For the Examples shown in Table 1, the branching is . predominantly LCB since all these PE samples were homopolymers, and because any in-situ short-chain branching was determined by 13C NMR spectroscopy to be at too low a concentration to

'69 ' ■ • • • account for Rg deviations as large as that shown in Figure 3. The most compact and highly branched molecules, characterized by small Rg, were obtained by the combination of an αnsα-metallocene lacking a pendant olefin and a fluorided solid oxide activator-support. This observation is consistent with Example 8 in Figure 2, where the highest level of LCB was produced when the α/wα-metallocene contained no pendant olefin and the fluorided solid oxide activator- support was employed. In Figure 3, the less pronounced differences in the other Examples were more difficult to discern. Figure 4 illustrates how LCB Varies with Mw using SEC-MALS data, by comparing the LCB concentrations of the. two PE samples made in Examples 10 and 11 demonstrating how LCB is decreased when sulfated alumina is used as the solid oxide activator-support in place of fluorided silica- alumina activator-support. This plot also distinguished certain features of the LCB which may not .be evident from Figure 3, that is, even when the ansa- metallocene contained a pendant olefin, small amounts of LCB were produced. However, the lowest levels of LCB were produced when using the sulfated solid oxide activator-support (Example 11), as opposed to the fluorided solid oxide activator-support. (Example 10), Further, Figure 4 illusrates how the number of long chain branches/1000 carbon atoms increased with increasing molecular weight, which further amplifies the effect of the long chain branches on the rheological properties of the resin.' Figure 5 plots versus log (Mw) for polymers prepared according to Examples 18-23 and Table 3, and further illustrates how reduced LCB levels are manifested. Linear polyethylene polymers are observed to follow a power law relationship between their, zero' shear viscosity, 770 , and their weight average molecular weight, Mw, with a power very close to 3.4. This relationship is shown by a straight line with a slope of 3.4 when the logarithm of 770 is plotted versus the logarithm, of Mw. Deviations from this linear polymer line are generally accepted as being caused by the presence of long- chain branching (LCB). Janzen and Colby presented a model that predicts the expected deviation from the linear φlot of log(^0) vs. log(Mw) for given frequencies of LCB as a function of the weight average molecular weight of the polymer. See:. ["Diagnosing long-chain branching in polyethylenes," J. MoI. Struct. 485-486, 569-584 (1999)], which is incorporated herein by reference, in its entirety. Figure 5 shows lines for the expected behavior for linear polymers and for the expected increases in zero shear viscosity for the frequencies of 1 LCB/106 carbons, 1 LCB/105 carbons, and 1 LCB/104 carbons as a function of Mw. The points correspond to the zero shear viscosities as obtained from fits of the melt viscosity data to the CarreaurYasuda equation as a function of Mw obtained from size-exclusion chromatography measurements for the polymers prepared according to this invention and to their comparative examples. The reduction in the amount of deviation of the zero shear viscosities from the linear polymer line for the polymers according to this invention compared to their comparative examples indicates the lower levels of LCB for these polymers. Thus, Examples 18 and 22- exhibit the highest level of LCB of those shown in Figure 5. . ■ ". - ■ ' ■ [ - ■ Definitions In order to more clearly define the terms used herein, the following definitions are provided. Tp the extent that any definition or usage provided by any document incorporated herein by reference conflicts with the definition or usage provided herein, the definition or usage provided herein controls. The term "polymer" is used herein to mean homopolymers comprising ethylene and/or copolymers of ethylene and another olefmic comonomer. "Polymer" is also used herein to.mean.homoporymers and copolymers of any other polymerizable monomer disclosed herein. The term "cocatalyst" is generally used herein to refer to the organoaluminum compounds that may constitute one component of the catalyst composition, but also refers to the optional components of the catalyst composition including, but not limited to, aluminoxanes, organoboron compounds, or ionizing ionic compounds, as disclosed herein. In one aspect, cocatalysts may be organoaluminum compounds of the formula Al(X5)n(X6)3-n, wherein (X5) is a hydrocarbyl having from 1 to 20 carbon atoms; (X6) is alkoxide or aryloxide, any of which having from 1 to 20 carbon atoms, halide, or hydride; and n is a number from 1 to 3, inclusive. The term cocatalyst may be used regardless of the actual function of the compound or any chemical mechanism by which the compound may operate. The term "precoήtacted" mixture is used herein to describe a first mixture of catalyst components that are contacted for a first period of time prior to the first mixture being used to form a "postcontacted" or second mixture of catalyst components that are contacted for a second period of time. Typically, the precontacted inixture describes a, mixture of metallocene, olefin monomer, and organoaluminum compound, before this mixture is contacted with the acidic activator-support and optionally an organoaluminum compound. Thus, "precontacted" describes components that are used to contact each other, but prior to contacting the components in the second, postcontacted mixture. Accordingly, this invention may occasionally distinguish between a component used to prepare the precontacted mixture and that component after the mixture has been prepared. For example, according to this description, it is possible for the precontacted organoaluminum compound, once it is contacted with the metallocene and the olefin monomer, to have reacted to form at least one different chemical compound, formulation, or structure from the distinct organoaluminum compound used to prepare the precontacted mixture. In this case,- the precontacted organoaluminum compound or component is . described as comprising an organoaluminum compound that was used to prepare the precontacted mixture. Similarly, the term "postcoritacted" mixture is used herein to describe a second mixture of catalyst components that are contacted for a second period of time, and one constituent of which, is .the "precontacted" or first mixture of catalyst components that were contacted for a first period of time. Typically, the term "postcontacted" mixture is used herein to describe the mixture of metallocene, olefin monomer, organoaluminum compound, and acidic activator-support, formed from contacting the ' precontacted mixture of a portion of these components with the any additional components added to make up the postcontacted mixture. .Generally;, the additional component added to make up the postcontacted mixture is the solid oxide activator, and optionally may include an organoaluminum compound the same or different from the organoaluminum. compound used to prepare the precontacted mixture, as described herein. Accordingly, this invention may also occasionally distinguish between \. a . component used to prepare the postcontacted mixture and that component after the mixture has been prepared. The term αnsα-metallcene. tightly-bridged metallocene describes a metallocene compound in which the two η5-cycloalkadienyl-type ligands in the molecule are linked by a bridging moiety, wherein the shortest link of the bridging moiety comprises . one atom.... Thus, the length of the bridge or the chain between the two cyclopentadienyl-type ligands is a single atom, although this bridging atom is substituted. Thus, the metallocenes of this invention are bridged bis(η5-cycloalkadienyl)-type compounds, wherein the η5-cycloalkadienyl portions include cyclop.entadienyl ligands, indenyl. ligands, fluorenyl ligands, and the like, including substituted derivatives or analogs of any of these. Possible substituents . on these ligands include hydrogen, therefore the description "substituted derivatives thereof in this invention comprises partially saturated , iigands such as tetrahydroindenyl, tetrahydrofluorenyl, octahydrofluorenyl, partially saturated indenyl, partially saturated fluorenyl, substituted partially saturated indenyl, substituted partially saturated fluorenyl, and the like. In some contexts, the metallocene is referred to simply as the "catalyst", in much the same way the term "cocatalyst" is used herein to refer to the organoaluminum compound. The terms "catalyst composition," "catalyst mixture," and the like do not depend upon the actual product of the reaction of the components of the mixtures, the nature of the active catalytic site, or the fate of the aluminum cocatalyst,. αnsα-metallocene, any olefin monomer used to prepare a precontacted mixture, or the solid. ■_.. oxide activator after combining these components. Therefore, the terms catalyst composition, catalyst mixture, and the like include both heterogeneous compositions and homogenous compositions. The term "hydrocarbyl" is used to specify a hydrocarbon radical group that includes, but is not limited iό aryl; alkyl, cycloalkyl, alkenyl, cycloalkenyl, cycloalkadienyl, alkynyl, aralkyl, aralkenyl, aralkynyl, and the like, and includes all substituted, unsubstituted, branched, linear, heteroatom substituted derivatives thereof. The terms solid oxide activator-support, acidic activator-support, activator-support, treated solid oxide compound, or simply "activator," and the like are used herein to indicate a treated, solid, inorganic oxide of relatively high porosity, which exhibits Lewis acidic or Brønsted acidic behavior, and which has been treated with an electron- withdrawing component, typically an anion, and which is calcined. The . electron- withdrawing component is typically an electron-withdrawing anion source compound. Thus, the treated solid oxide compound comprises the .calcined contact product of at least one solid oxide compound with at least one electron-withdrawing anion source compound. Typically, the activator-support or "treated solid oxide compound" comprises at least one ionizing, acidic solid oxide compound. The terms support or activator-support are not used to imply these components are inert, and this component should not be construed as an inert component of the catalyst composition. The term "clay" is used herein to refer to that component of the catalyst composition, a substantial portion of which constitutes a clay mineral or a mixture of clay minerals that have been pretreated by either exchanging cations, pillaring or simply wetting, that may be used as a activator-support in the catalyst composition described herein.- The transition metal compound and organometal cocatalyst are reacted; with. the clay activator-support to form the active catalyst. While not intending to be bound by the following statement, the clay component of the catalyst composition of this invention probably functions as a activator-support for the transition metal compound, as well as a cocatalyst from the standpoint that it is in intimate physical chemical contact with the transition metal component. • /:■ ' As used herein, the collective term "clay mineral" is used herein to describe the large group of finely-crystalline, sheet like clay minerals that are found in nature in fine-grained sediments, sedimentary rocks, and the like. Clay minerals are a class of .hydrous silicate and aluminosilicate minerals with sheet-like structures and very high' surface areas. This term is also used to describe hydrous magnesium silicates with a phyllosilicate structure. Many common clay minerals belong to the kaolinite, montmorillonite, or illite groups of clays. Thus,, the term "clay mineral" is not used herein to refer to the fine-grained soil consisting of mineral particles, not necessarily clay minerals, that are less than 0.002 rntn in size. The term "pillared clay" is used herein to refer to a component of the catalyst composition comprising day minerals, typically of the of the smectite group and other phylosilicat.es in addition to sepiolites and palygorskites, that have been ion exchanged with large, typically polynuclear, highly charged metal complex cations. Examples of such ions include, but are not limited to, Keggin ions which may have charges such as 7+, various polyoxometallates, and other large ions. Thus, the term pillaring refers to a simple exchange reaction in which the exchangeable cations of a clay material are replaced with large, highly charged ions, such as. Keggin ions. These polymeric cations are then immobilized within the interlayers of the clay and when calcined are coverted to metal oxide "pillars," effectively supporting the clay layers as column-like structures. Examples of pillaring and pillared clays are found in: TJ. Pinnavaia, Science 220 (4595), . 365-371 (1983); J.M. Thomas, Intercalation Chemistry, (S. Whittingtόή and A. Jacobson, eds.) Ch. 3, pp. 55- 99, Academic Press, Inc., (1972); U.S. Patent No. 4,452,910; U.S. Patent No. 5,376,611; and U.S. Patent No. .4,060,480; each of which is incorporated herein in its entirety. . Although any methods, devices, and materials similar or equivalent to those described herein can. be used in the practice or testing of the invention, the typical methods, devices and materials are herein described. AU publications and patents mentioned herein are incorporated herein by reference for the purpose of . describing and disclosing, for example, the constructs and methodologies that are described in the publications, which might be used in connection with '.the presently described invention. The publications discussed above and throughout the text are provided solely for their disclosure prior to the filing date of the present application. Nothing herein is to be construed as an admission that the inventors are not entitled to antedate such disclosure by virtue of prior invention. For any particular .compound .disclosed herein, any general structure presented also encompasses all conformational isomers, regioisomers, and stereoisomers that may arise from a particular set of substitutents. The general structure also encompasses all enantiomers, diastereomers, and other optical

■ . ■■.. ■.7.6 " .- ' ' isomers whether in enantiomeric or racemic forms, as well as mixtures of stereoisomers, as the context requires. The present invention is further, illustrated by the following examples, which are not to be construed in any. way as imposing limitations upon the scope thereof. On the contrary, it is to be clearly understood that resort may be had to various other aspects, embodiments, modifications, and equivalents thereof which, after reading the description herein, may suggest themselves to one of ordinary skill in the art without departing from the spirit of the present invention or the scope of the appended claims. In the following examples, unless otherwise specified, the syntheses and preparations described herein were carried out under an inert atmosphere such as nitrogen and/or argon. Solvents were purchased from commercial sources and were typically dried over activated alumina prior to use. Unless otherwise specified, re from commercial sources.

EXAMPLE 1 General Testing Procedures Melt index (MI, g/10 min) was determined in accordance with ASTM D 1238 condition F at 19O0C with a 2, 160 gram weight. High load melt index. (HLMIv g/10 fniri) was determined in accordance with ASTM D 1238 condition E at 19O0C with a 21 ,600 gram weight. Polymer density was determined in grams per cubic centimeter (g/cc) on a compression molded sample, cooled at 150C per hour, and conditioned for 40 hours at room temperature in .accordance with ASTM Dl 505 and ASTM D1928, procedure C. • ;V . . Molecular weight and molecular weight distributions were obtained using a PL-GPC 220 (Polymer Labs, UK) system equipped with a differential refractive index detector and three- 7.5 mm x 300 mm 20 um Mixed A-LS columns (Polymer Labs) running, at 145 0C. The flow rate of the mobile

■ • , V 77 " ' ■ • . phase, 1,2,4-trichlorobenzene (TCB) containing 0.5 g/L 2,6-di-t-butyl-4- methylphenol (BHT), was set at 1 rruVmin and the concentration of polymer solutions was generally kept in the range of 1.0-1.5 mg/rnL, depending on the molecular weights. Sample preparation was conducted at 150 0C for 4 h with occasional and gentle agitation before the solutions being transferred to sample vials for injection. In order to minimize unbalanced solvent peak, solvent with the same composition as the mobile. phase was used for solution preparation. The integral calibration method was employed to deduce molecular weights and molecular weight distributions, .using a Chevron Phillips Chemicals Company's broad linear polyethylene, Marlex BHB5003, as the broad standard. The integral table of the broad standard was pre-determined in a separate experiment with SEC-MALS.

Melt viscosity measurements to determine shear viscosity characteristics Small-strain oscillatory shear measurements were performed on an ARES oscillatory rheometer using parallel-plate geometry (TA Instruments, formerly Rheometrics Inc.). Data were typically obtained over an angular frequency range of 0.03 to 100 rad/s at a temperature of 190 0C. Fluff samples were stabilized.; with 0.1 wt% BHT dispersed in acetone and then vacuum dried before molding." Samples were compression molded at 184 0C for a total of three minutes. The samples were allowed to melt at a relatively low pressure for one minute and then subjected to a high molding pressure for an additional two minutes. The molded samples were then quenched in a cold (room temperature) press. .2 mm x 25.4 mm diameter disks were stamped out of the molded slabs for rheological characterization. The test chamber of the rheometer was blanketed in nitrogen in order to minimize polymer degradation. The ■ rheometer was preheated to the initial temperature of the study. Upon' sample loading and after oven thermal equilibration, the specimens were squeezed between the plates to a 1.6 mm thickness and the excess was trimmed. Strains were generally maintained at a single value throughout a frequency sweep but larger strain values were used for low viscosity samples to maintain a measurable torque. Smaller strain values were used for high viscosity samples to avoid overloading the torque transducer and to keep within the linear viscoelastic limits of the sample. The instrument automatically, reduces the strain at high frequencies if necessary to keep from overloading the torque transducer. ., ' . ' Viscosity data were fit with a modified Carreau-Yasuda model [R. Byron Bird, Robert C. Armstrong, and Ole Hassager, Dynamics of Polymeric Liquids, Volume 1, Fluid Mechanics, (John Wiley & Sons, New York, 1987), p 171-172], which is incorporated by. reference herein to obtain estimates of the zero shear viscosity, viscous relaxation time, and a breadth parameter, as indicated below.

|77*| = /7o/[l + (^η) fl] ((M/Λ),

wherein: ) 77*] = magnitude of the complex' viscosity in Pa- s ω = angular frequency in rad/s 770 = zero shear viscosity in Pa- s rη = viscous relaxation time in s α = breadth parameter n = power law parameter ; :fixed at 0.1818 ■ ■ Absolute Molecular Weight as Determined by Light Scattering Molecular weight data were determined using SEC-MALS, which combines the methods of size exclusion chromatography (SEC) with multi- angle light scattering (MALS) detection. A DAWN EOS 18-angle light scattering photometer (Wyatt Technology, Santa Barbara, CA) was attached to a PL-210 SEC system (Polymer Labs, UK) or ,a. Waters 150 CV Plus system (Milford, MA) through a hot transfer line, thermally controlled at the same temperature as the SEC columns and its differential refractive index (DRI) detector (145 0C). At a flow rate setting of 0.7 mL/min, the mobile phase, 1,,2,4-trichIorobenzene (TCB), was eluted through three, 7.5 mm x 300 mm, 20 μm Mixed A-LS columns (Polymer- Labs). Polyethylene (PE) solutions with concentrations of ~1.2 mg/mL, depending on samples, were prepared at 150 0C for 4 h before being transferred to the SEC injection vials sitting in a carousel heated at 145 0C. For polymers of higher molecular weight, longer heating times were necessary in order to obtain true homogeneous solutions. In addition to acquiring . a concentration chromatogram, seventeen light- scattering chromatograms at different angles were also acquired for each injection using Wyatt's Astra® software. At each chromatographic slice, both the absolute molecular weight (M) and root mean square (RMS) radius, also known as radius of gyration (i?g) were obtained from a Debye plot's intercept and slope, respectively. Methods for this process are detailed in Wyatt, P. J., Anal. CMm. Acta, 272, 1 (1993), which is hereby incorporated herein by reference in its entirety. The linear PE control employed was a linear, high- density broad MWD polyethylene sample (Chevron Phillips Chemical Co.). The weight average molecular weight (Mw), number average molecular weight (Mn), z-average molecular weight (M2)- and molecular weight distribution (MJMn) were computed from this data, and are presented in various Tables. The Zimm-Stoclαnayer approach was used to determine the amount of LCB in ethylene polymers. Since SEC-MALS measures M and Rg at each slice of a chromatogram simultaneously, the branching indices, gu, as a function of M could be determined a.t. each slice directly by determining the ratio of the mean square Rg of branched molecules to that of linear ones, at the same M, as shown in equation 1 :

where the subscripts br and Hn represent branched and linear polymers, respectively. ; ..• ■. . ■ At a given ' gu, the weight-aver-aged number of LCB per molecule (B3w) was computed using Zimm-Stockmayer's equation, shown in equation 2, where the branches were assumed to be trifunctional, or Y-shaped.

6 J 1 ( 2 + 53* In '(I + B3JA + (B3JA' SM = - 1 (2) B3w 2 1 B '3- w (2 + B3JA -(B3JA

LCB frequency (LCBM. ), the number ; of LCB per 1 000 C, of the ith slice was then computed straightforwardly using equation 3: LCBMi = 1 000*14*B3w/Mi (3) where Mj is the MW of the /th slice. The LCB distribution across the molecular weight distribution (MWD), (LCBp); . was thus be established for a full polymer. A "Quantachrome Autosorb-6 Nitrogen Pore Size Distribution Instrument" was used to determined specific surface area ("surface area") and specific pore volume ("pore volume"). This instrument was acquired from the Quantachrome Corporation, Syosset, N. Y. V'- ' EXAMPLE 2 Preparation of a Fluorided Silica-Alumina Activator-Support The silica-alumina used to prepare the fluorided silica-alumina acidic activator-support in this Example 'was typically Davison silica-alumina obtained from W.R. Grace as Grade- MS 13-110, containing 13% alumina, having a pore volume of 1.2 cc/g and a surface area of 400 m2/g. This material was fluorided by impregnation to incipient wetness with a solution containing ammonium bifluoride in an amount sufficient to equal 10 wt % of the weight of the silica-alumina. This impregnated material was then dried in a vacuum oven for 8 hours at 100°C. The thus-fluorided silica- alumina samples were then calcined as follows. ■ 10 grams of the alumina were placed in a 1.75-inch quartz tube fitted with . a sintered quartz disk at the bottom. While the silica was supported on the disk, dry air was blown up through the disk at the linear rate of 0.045 to 0.051 cubic meter per hour (1.6 to 1.8 standard cubic feet per hour). An electric furnace around the quartz tube was used to increase the temperature of the tube at the rate of 4000C per hour to a final temperature of 5000C. At . this temperature, the silica-alumina was allowed to fluidize for three hours in the dry air. Afterward, the silica- alumina was collected and stored under dry nitrogen, and was used without exposure to the atmosphere.

EXAMPLE 3 Preparation of a Sulfated Alumina Activator-Support Generally, sulfated alumina- was formed by a process wherein alumina was chemically-treated with a sulfate or bisulfate source, typically , but not limited to, . sulfuric acid, ammonium, sulfate, or ammonium bisulfate. One example follows. . ■ . .. A commercial alumina sold as W.R. Grace Alumina A was sulfated by impregnation with an aqueous solution . containing 15-2.0% (NH4)2SO4 or H2SO4. This sulfated alumina was calcined at 550 0C in air (240 °C/h ramp rate), with a 3 h hold period at this temperature. Afterward, the alumina was collected and stored under dry nitrogen., and was used without exposure to the atmosphere. ■ .. . EXAMPLE 4 Metallocene Preparations All manipulations involving air-sensitive reagents and materials were performed under nitrogen . by using standard Schlenk line or dry box techniques. The solvent THE was. distilled from potassium, while anhydrous diethyl ether, methylene chloride, pentane, and toluene (Fisher Scientific Company) were stored over activated alumina. All solvents were degassed and stored under nitrogen. Zirconium(IV) chloride (99.5%) and n- butyllithium were purchased from Aldrich Chemical Company and were used as received. Products were analyzed, by 1H NMR (300 MHz, CDCl3, referenced against residual CHCl3 ρea]c: at 7.24 ppm) or 13C NMR (75 MHz, CDCl3, referenced against central line Of CDCl3 at 77.00 ppm).

(MethyI)(n~butyl)methylidene(η5-cycIopentadienyl)(ηs-9- fluorenyl)- zirconium dichloride (A). _ ό-fMemviyό-fa-butvDfulvene. "Cyclopentadiene (16.5 g, 0.25 mol) was added to 2-hexanone (20 g, 0.2 mol) in methanol (100 mL), followed by the addition of pyrrolidine (21.3 g, 0.3 mol) at 0 0C; This mixture was stirred for 1 h at 0 0C, then stirred for an additional 1.5 h at room temperature. The reaction was then quenched with acetic acid (20 mL), and this mixture was extracted with Et2O. The resulting. Organic layer was washed with water and then dried over anhydrous Na2SO4: Removal of the solvent gave the product as a yellow liquid (23.7 g, 96% pure, GC), which was used in the ligand synthesis without further purification. 1H NMR (300 MHz, CDCl3): δ 6.52- 6.62 (m, 4H)5 2.60 (t, J = 7,8 Hz, 2H), 2.27 (s, 3H), 1.56-1.68 (m, 2H), 1.37- 1.50 (m, 2H), 1.01 (VJ= 7.5 Hz, 3H);. *?C NMR (75 MHz, CDCl3): δ 154.28, 142.54, 130.69, 130.46, 120.68, 120.37, 36.62, 31.33, 22.77, 20.88, 13.95.' 1 -(Methyl)- 1 -( n-butyl)- 1 -(cyclopentadienvD- 1 -f fluorenyltoethane. BuLi (8 mL, 10 M in hexanes, 80 mmol) was added dropwise to fluorene (13.3 g, 80 mmol) dissolved in Et2O (200 mL) at 0 0C. The resulting mixture was warmed to room temperature and stirred for 2 h, giving rise to a dark red solution of FIuLi. The 6-(Methyl)-6-(ή-butyl)fulvene (11.85 g, 80 mmol) was added to the FIuLi solution dropwise at 0 °C. The resulting mixture was stirred at room temperature for 3 hours, then this reaction was quenched with water, and the resulting mixture was extracted with Et2O. The organic layer was washed with water and then dried over anhydrous Na2SO4. Removal of the solvent gave the crude product as a- viscous yellow material. The crude product was purified by column, chromatography on silica gel with 5-10% CH2Cl2 in heptane. The pure product (14.6 g, 58.1% yield) was obtained as a pale yellow solid as a mixture of the isomers. (Methyl)(n-butyl)methylidene(η5-cyclopentadienyl)rη5-9-flu orenyl)- zirconium dichloride (Compound A); The ligand (3.14 g, 10 mmol) was dissolved in 30 mL of anhydrous Et2O. and cooled to 0 °C under nitrogen, n- BuLi (8 mL, 2.5 M in hexanes, 20 mmol) was added dropwise to the ligand solution. The resulting mixture was warmed to room temperature and stirred for an additional 7 hours, giving rise to a red solution. This solution was added dropwise to ZrCl4 (2.5 g, 10.7. mmol) suspended in a mixture of pentane (30 mL) and Et2O (10 mL) at 0 0G, and- the. resulting mixture was warmed to room temperature and stirred overnight, giving rise to an orange suspension. The solid was collected by filtration, washed with Et2O (10 mL) and extracted with 180 mL of CH2Cl2. Removal of the solvent from the CH2Cl2 extract gave the product as an orange solid (3.8. g, .80.2% yield). 1H NMR (300 MHz, CDCl3) δ 8.14-8.18 (m, 2H), 7.85..(d, J= 9.0 Hz, IH), 7.67 (d, J= 9.0 Hz, IH), 7.56-7.62 (m, 2H), 7.26-7.37 (m, 2H), 6.35(t, J = 2.4 Hz, 2H), 5.75-5.83 (m, 2H), 3.05-3.18 (m, IH), 2.41 (s, 3H), 2.15-2.28 (m, IH), 1.75-1.90 (m, 2H), 1.55-1.69 (m, 2H), 1.05 (t, J = 7.5. Hz, 3H). 13C NMR (75 MHz5 CDCl3) δ 129.35, 129.16, 125.09, 125.03, .124.93, 124.88, 123.45, 123.40, 123.31, 122.99, 122.18, 119.76, 118.72, 115.08, 102.60, 101.68, 78.95, 44.46, 40.35, 26.62, 25.71, 23.25, 14.23. ■ Methyl-3-butenylmethylidene(η5-cyclopentadienyI)(η5-9-fluo renyl)- zirconium dichloride (B) was prepared as described in U.S. Patent No. 5,498,581. The following compounds can be prepared according to a procedure analogous to that described in U.S. Patent No. 5,498,581, using the appropriate precursors: . . • methyl-3-butenylmethylidene(ή/-cyclopentadienyl)(η5-2,7-di -t-butyl-9- fluorenyl)zirconium dichloride; methyl-4-ρentenylmethylidene(η5-cyclopentadienyl)(η5-9- fluorenyl)zirconium dichloride; methyl-4-pentenylmethylidene(ή5-cyclopentadienyl)(η5-2,7-d i-f-butyl- 9-fluorenyl)zirconium dichloride; methyl-5-hexenylmethylidene(η5-cyclopentadienyl)(η5-9- fluorenyl)zirconium dichloride; and methyl-5-hexenylmethylidene(η5-cyclopentadienyl)(η5-2,7-di -t-butyl- 9-fluorenyl)zirconium dichloride, ■' .- :•'

Phenyl-4-pentenyImethyIidene(η5-cyclopentadienyl)(η5-9- fluorenyl)- zirconium dichloride (C). Scheme 1 illustrates the preparative procedure for this metallocene and the ligands used to prepare this metallocene. . 6-Phenyl-6-(4-pentenyl)fulvene. A sample of pentenylphenone was prepared by the same procedure as that for butenylphenone as described by Kδppl and Alt, J. MoI Catal. A: Chemical, 2001, 165, 23, but using 4-bromo- 1-butene instead of allylbromide. A 1 L round bottomed flask was charged with pentenylphenone (50 g, 287 rnmol), THF (100 mL), a stir bar and cooled to 0 0C. Cyclopentadienyl magnesium chloride (325 mL of an approximately 1.1 M solution in THF, 345 mmol) was added dropwise via an addition funnel while maintaining the temperature at 00C. The resulting mixture was slowly warmed to room temperature, refluxed for 3 h, then cooled to room temperature. This reaction was neutralized with 2 M HCl, and extracted with pentane. The pentane extracts were dried with sodium sulfate, filtered, and evaporated to dryness to afford 67 g of a red oil. Elution of this oil through silica using heptane afforded 33. g. (52%) of the product 6-phenyl-6-(4- pentenyl)ralvene as a red oil. 1H NMR (CDCl3, 3O0C): δ 7.38 (m, 5H, C6H5); 6.63 (m, IH), 6.58 (m, IH), 6.49 (m, IH), 6.11 (m, IH, fulvene CH); 5.75 (m, 1Η, alkenyl CH); 4.97 (m, 2Η, alkenyl CH2); 2.94 (t, 2Η), 2.07 (dd, 2H, CH2); 1.53 (t, 2H5 CH3). 1 -(Phenyl)- 1 -(4-pentenyl)- 1 -(cyclopentadienyl)- 1 -(fluorenyPmethane. A l L round bottomed flask was charged with fluorene (23.2 g, 139.6 mmol), TΗF (400 mL), and a stir bar, and was cooled to -78 0C as n-butyllithium (165 mmol) was slowly added. The mixture was warmed to room temperature, stirred overnight, cooled to 0 0C, and 6-phenyl-6-(5-pentenyl)fύlvene (38 g, 171 mmol), dissolved in TΗF, added via cannula. After stirring for two days at room temperature the reaction was quenched with saturated NH4Cl solution, the organic material extracted with diethyl ether, and the extracts dried over anhydrous Na2SO4. Upon solvent removal 69.1 g of yellow oil was isolated. Chromotograhy of this oil through, silica- using heptane afforded 31.7 g (58%) of the desired ligand that was used without further purification. Phenyl-4-pentenylmethyliderieTη5-cyclopentadienyl)(η5-9-fl uorenylV zirconium dichloride (Compound C). A . round bottomed flask was charged with ligand (1 -(Phenyl)- l-(4-pentenyl)-l -(cyclopentadienyl)- 1-

■ ' :- v 86 ■■ ■' ■ • (fluorenyl)methane) (7.20 g, 18.6 mmol), ether (250 mL), stir bar and cooled to -78 0C as n-butyllithium (40 mmol) was slowly added. The mixture was warmed to room temperature, stirred overnight, and then added via cannula to ZrCl4 (4.3 g, 18.5 mmol) stirring in pentane (250 mL) at 0 0C. The orange mixture was warmed to room temperature, stirred overnight, centrifuged, and the supernatant decanted. The remaining solid was extracted with methylene chloride. The extract was centrifuged, supernatant decanted, and subsequently evacuated to dryness affording a reddish solid (7.1 g, 70%). 1H NMR (CDCl3, 3O0C): δ 8.19 (m, 2H), 7.87 (m, 2H),/7,63 (m, 3H), 7.48 (m, 4H), 6.94 (t, IH), 6.21 (d, IH, ArCH); 6.47 (m, IH), 6.34 (m, IH), 5.95 (m, IH), 5.78 (m, IH, CpH); 5.84 (m, 1Η pentenyl-CH), 5.09 (m, 2Η, pentenyl-CH2), 2.96 (m, 2Η), 2.22 (m, 2H), 1.63 (m, 2H). 13C NMR (CDCl3, 3O0C): δ 142.77, 138.19, 129.99, 129.88, 128.82, 128.67,. Ϊ27.81, 127.57, 127.26, 125.35, 125.29, 125.23, 124.55, 124.07, 123.87,. røS3, 123.42, 122.77, 121.29, 120.23, 117.88, 115.57, 112.49, 103.62, 103.20, 79.10, 54.04, 39.98, 33.85, 23.38. Scheme 1 STEP l - ketone

The following compounds can- be prepared according to a procedure

analogous to that described herein for phenyl-4-pentenylmethylidene(η5-

cyclopentadienyl)(η5-9-fluorenyl)zircoήium dichloride (Compound C), using

the appropriate precursors:

phenyl-3-butenylmethylidene(ή5-cyclopentadienyl)(η5-9-

fluorenyl)zirconium dichloride;

phenyl-3-butenylmethylidene:(ή5-cyclopentadienyl)(η5-2, 7-di-t-butyl-9-

fluorenyl)zirconium dichloride; plienyl-4-pentenylmethylidene(η5-cyclopentadienyl)(η5-9- ~fluorenyl)zirconium dichloride; .. phenyl-4-pentenylmethylidene(η5-cyclopentadienyl)(η5-2,7-d i-t-butyl- 9-fluorenyl)zirconium dichloride; phenyl-5-hexenylmethylidene(η5-cyclopentadienyi)(η5-9- fluorenyl)zirconium dichloride; and ' . phenyl-5-hexenylmethylidene(tl5-cyclopentadienyl)(η5-2,7-di -t-butyl- 9-fluorenyl)zirconium dichloride.

MethyIoctylsilylbis(η5-fluoren-9-yl)zirconium(IV) dichloride (D). Difluoren-9-yl(methyi)octy.lsilane. A portion of n-BuLi (40 mL, 10 M in hexanes, 400 mmol) was added, dropwise to fluorene (66.4 g, 400 mmol) dissolved in THF (500 mL) at -780C. The resulting mixture was warmed to room temperature slowly and stirred overnight, giving rise to a dark red solution. This solution was added dropwise to methyloctyldichlorosilane (45.4 g, 200 mmol) in THF (50 mL) at room temperature over a period of 4 hours. The resulting mixture was stirred at room temperature overnight, quenched with water and extracted with Et2O (800 mL). The organic layers were combined, washed with water and then dried over anhydrous Na2SO4. Removal of the solvent afforded a reddish oil. The oil was purified by column chromatography on silica gel with .5-10% (v/v) CH2Cl2 in heptane. Pure product (46 g, 47% yield) was obtained as a yellow solid. 1H NMR (300 MHz, CDCl3) δ 7.88 (d, J = 7.8 Hz, 4H), 7.22 -7.48 (m, 12H), 4.14 (s, 2H), 0.84-1.35 (m, 13H), 0.55-0.65 (m, 2H)3 0.22-0.33 (m, 2H), -0.36 (s, 3H). 13C NMR (75 MHz, CDCl3) δ 145.10, 145.06, 140.79, 140.75, 126.18, 126.14, 125.55, 125.52, 124.34, 124.25, 120.Q8 (2C), 39.70, 33.24, 31.80, 28.90, 28.77, 23.14, 22.63, 14:10, 11:63, -7vl2, - ■ Methyloctylsilylbis(η5-fluoren-9-yDzirconiimiriV') dichloride (Compound D). A sample of difluqren-9-yl(methyl)octylsilane (4.25 g, 8.7 mmol) was dissolved in 50 mL of anhydrous Et2O and cooled to -78°C under nitrogen. A portion of ra-BuLi (7 mL, 2.5 M in hexanes, 17.5 mmol) was added dropwise to the ligand solution. The resulting mixture was warmed to room temperature and stirred overnight,' giving rise to dark red solution. This solution was added to ZrCl4 (2.03 g, 8.7 mmol) suspended in 50 mL of pentane at 0° C over approximately 20 min. The resulting mixture was warmed to room temperature and stirred overnight, giving rise to a purple suspension. The solid was collected by filtration, washed with pentane and extracted with 200 mL of CH2Cl2. Removal of the solvent from the CH2Cl2 extract gave a purple solid (4.8 g, 84.9% yield). 1H NMR (300 MHz, CDCl3) δ 7.75-7.9 (m, 8H), 7.35 (t, J= 7.6 Hz, 4H), 7.01-7.11 (m, 4H), 2.10-2.20 (m, 2H), 1.97-2.10 (m, 2H), 1.76 (quintet, J = 7.2 Hz, 2H), 1.65 (s, 3H), 1.30-1.58 (m, 8H), 0.92 6.4 Hz, 3H). 13C NMR (75 MHz, CDCl3) δ 130.59, 130,34, 128.24, 128.13, 127.75, 127.66, 126.02, 125:99, 125.43, 125.36, 124.61 (unresolved 2C), 64.77, 33.65, 31.89, 29.43, 29.19, 22.95, 22.65, 18.26, 14.08, 0.31.

MethyloctenylsiIylbis(η5-fluoren-9-yl)zirconium(IV) dichloride (E) was prepared as disclosed in J. Organomet. Chem. 1998, 562, 153-181. The following compounds can be prepared according to a procedure analogous to that described in J. Organomet. Chem. 1998, 562, 153-181, using the appropriate precursors: methyl-3-butenylsilylbis(η5-fluoren-9-yl)zirconium(IV) dichloride; methyl-4-pentenylsilylbis(η5-fluoren-9-yl)zirconium(IV) dichloride; methyl-5-hexenylsiiylbis(η5-fluόren-9-yl)zircortium(IV) dichloride; and methyl-6-heptenylsilylbis(η5-fluoren-9-yl)zirconium(IV) dichloride. Dimethylmethylidene(η5-cyclopentadienyl)(ηs-9-fluorenyl)zi rconium dichloride (F) was purchased from Boulder Scientific Company, (Mead, Colorado). /. .

EXAlviPLES 5-ll Comparative Catalytic Runs Varying the Metallocene, Activator-Support, and Pendent Alkene of the Metallocene Examples 5-11 iii Table 1 illustrate ethylene polymerization runs performed in a one-gallon autoclave reactor at 1000C5 with two liters of isobutane diluent and triisobutylaluminum or triethylaluminum cocatalyst. No hydrogen or comonomer was added. Ethylene was fed on demand to maintain the specified pressure for the specified length of the polymerization run (Table 1). ^nsα-Metallocene solutions were usually prepared by dissolving 20-25 mg of metallocene in a mixture of 0-5: ml, of 1-hexene, 0-5 niL of 1 M TIBA (Aldrich) or TEA .(Akzo), and 15-25 mL of heptane. In Examples 5-9, the metallocene solution was prepared by dissolving 22 mg of metallocene in a mixture of 5 mL of 1-hexene, 5 mL of 1 M TEA, and 12 mL of heptane and sonicating the mixture for 40 minutes. • For Examples 5-9, the reactor was charged with TIBA, an aliquot -of ; the metallocene solution, and the solid oxide. All materials were . added , through a charge port while venting isobutane. One method of charging catalyst to the reactor was to charge TIBA, solid-oxide, and an aliquot of the metallocene solution through a charge port while venting isobutane. For Examples 10 and 11 in Table 1 the metallpcenes were precontacted with, hexene and AlR3 for at least 16 hours. Alternatively, an aliquot of the' precontacted metallocene solution was contacted with the solid-oxide by addition via syringe to a mixture of solid- oxide in heptane, and this postcontacted solution was subsequently used for the polymerization runs. After the allotted polymerization.' time, the ethylene flow was stopped, and the reactor slowly depressurized and opened to recover a granular polymer. In all cases, the reactor was clean with no indication of any wall scale, coating or other forms of fouling. The polymer was then removed and weighed. Activity was specified as grams of polymer produced per gram of solid oxide compound charged per hour.((g/g)/hr). For the examples in Table 1, the branching is predominantly: LCB since all these PE samples were homopolymers and any in-situ. short-chain branching was determined by 13C NMR to be at too low a concentration to account for Rg deviations as large as shown in Figure 3. 21051 OPCT

Table 1. Polymerization data for polymerizations performed in autoclave reactor.

A. Type of απsα-metallocene used as shown in Figure 1. 5 /B. Weight in grams : of metallocene used. . . • • . ' •'• • C... Type of orgaήoaiummύm cocatalyst used.. TEA — triemylalummum;.TIBA = triisobύtylalurrμhum. ' p.' Amount of organoafuminum cocatalyst uSe^ . E. Reactor pressure dύrfflg polymerization run in psi, 37.9 bar (550psig), 24.13 bar (350 psig) ' ■ • . F. Reactor temperature maintained throughout the polymerization run, in degrees Celsius. . 10 G. Polymerization run length in minutes. H. Weight in grams ofhexene comonomer added to the polymerization run. I. Type of solid-oxide used. F-SA is fluorided Davison silica-alumina calcined at 5000C; SO4-A is 15-20% (NH4)2SO4 or H2SO4 on Grace Alumina A, calcined at 55O0C in air (240°C/hour ramp rate), 3 hour hold. Stored under N2. 15 J. Weight in grams of solid-oxide activator-support used. K. Polymer yield in grams. L. Polymerization activity in (grams PE/grams metallocene/hour) divided by 106. M Polymerization activity in (grams PE/gram solid-oxide/hour) divided by 103. EXAMPLES 12*17 Preparation of Various Precontacted and Postcontacted Catalyst Compositions and Comparison of the Polymerization Activity of These Compositions : The Experiments presented iii Table 2 provide a comparison of catalyst compositions comprising the metallocene catalyst, [η5-cyclopentadienyl-η5-(9- fluorenyl) hex-1-ene] zirconium dichloride, CH2=CHCH2CH2C(CH3)(Cp)(9- FIu)ZrCl2, triethylaluminum (TEA), monomer (ethylene) and comonomer (1- hexene), and fluorided silica-alumina activator-sμpport, both with and without the precontacting step of the metallocene, TEA, and 1 -hexene. Example 12 represents a standard catalytic run, that was obtained as follows. Under a nitrogen atmosphere, 2 mL of 1 -hexene, 2 mL of a solution of catalyst solution prepared from [η5-cyclopentadienyl-η5-(9-fluorenyl) hex- 1-ene] zirconium dichloride, CH2?CHCH2CH2C(CH3)(Cp)(9-Flu)ZrCl2, in toluene (2 mg/mL), and 1 mL of 15 wt% triethylaluminum in heptane solution were added to a Diels- Alder tube. This solution was immediately added to 250 mg of activator-support and and the mixture was immediately charged to the reactor. Thus, Example 12 of Table 2 represents polymerization data obtained from the near simultaneous contacting of CH2=CHCH2CH2C(CH3)(Cp)(9-Flu)ZrCl2, TEA, 1 -hexene, and fluorided silica-alumina activator-support, without precontacting the αwsα-metallocene, triethylaluminum (TEA), and 1 -hexene, and therefore provides a baseline for comparison with Examples 13 and 14. Example 13 represents a catalytic run obtained in the same manner as the standard run of Example 12, except that Example 13 included a precontacting step of 0-25 . hours for the metallocene CH2=CHCH2CH2C(CH3)(Cp)(9-Flu)ZrGl2, TEA, and 1-hexene, prior to contacting this mixture with the fluorided silica-alumina activator-support. Example 14 represents a catalytic run obtained in the same manner as the standard run of Example 12, except that Example 14 included no precontacting of the metallocene, TEA, and 1-hexene, but instead included a "postcontacted" step (according to.-the.- definitions herein) of 0.50 hours in which all components, namely the metallocene CH2=CHCH2CH2C(CH3)(Cp)(9-Flu)ZrCl2, TEA, 1-hexene, and the fluorided silica-alumina activator-support were contacted prior to adding this postcontacted mixture to the reactor. This example demonstrates that an increase in activity is obtained by precontacting the metallocene, TEA and 1- hexene, as compared to initiating polymerizations in the presence of all the reactants without precontacted. Example 15 was prepared as follows. The metallocene catalyst CH2=CHCH2CH2C(CH3)(Cp)(^FIu)ZrCl2 (24 mg) was placed in a Diels- Alder tube and maintained in the dark by covering the tube with aluminum foil. A 12-mL sample of dry heptane (but no hexene) was added and this mixture was stirred while 2 mL of 15 wt% triethylaluminum in heptane was added. This slurry was stirred in.the.dark at room temperature for 17 hours, to provide a light yellow solution. This sample was maintained in the dark until use. Example 15 included a "postcontacting" step of 0.25 hours for 2 mLs of this precontacted solution, 1 mL of.15 wt% TEA, and the fluorided silica- alumina activator-support prior to adding to the reactor. Example 15 provides a baseline for comparison of Examples.16 and 17. Example 16 was prepared as follows. The metallocene catalyst CH2=CHCH2CH2C(CH3χCpX9-Flu)ZrCi2. (24 mg) was placed in a Diels- Alder tube and maintained in the . dark by covering the tube with aluminum foil, A 12-mL sample of 1-hexene was added and this mixture was stirred while 2 mL of 15 wt% triethylaluminum in heptane was added. This slurry was stirred in the dark at room temperature for 17 hours, to provide a dark yellow solution in which all the catalyst had dissolved. This sample was maintained in the dark until use. This Example included a "postcontacting" step of 0.25 hours for 2 mLs of this solution, 1 mL of 15 wt% TEA, and the fiuorided silica-alumina activator-support prior to adding to the reactor. Example 17 was prepared as follows. The CH2=CHCH2CH2C(CH3)(Cρ)(9-Flu)ZrCl2 metallocene catalyst (10 mg) was placed in a Diels- Alder tube, to which 20 mL of 1-hexene and 2 mL of 15 wt% triethylaluminum in heptane were added. This mixture was maintained in the dark and the Diels- Alder tube was put. in an ultra sonic bath and sonicated for 10 minutes. A dark yellow solution was obtained in which all the catalyst had dissolved. This sample was maintained in the dark until use. This Example included a "postcontacting" step of 0.25 hours for.4 mLs of this solution, 1 mL of 15 wt% TEA, and the fiuorided silica-alumina activator-support prior to adding to the reactor. Examples 16 and 17 show that a large increase in activity is obtained by precontacting the metallocene, TEA and 1-hexene compared to Example 15, where 1-hexene was excluded. Polymerization reactions were carried out as follows. Following any precontact and postcontact steps for a particular sample, a catalyst slurry (comprising metallocene, organoaluminum, olefin, and activator-support) was added to a 1 -gallon autoclave under an isobutane purge. The autoclave was sealed, 2 liters of isobutane were - added, and stirring was initiated and maintained at 700 rpm. The reactor was quickly heated to 80°C over a period of 2 minutes. A 25-g sample of 1-hexene was. forced into the reactor > and the total pressure was brought to 31.03 bar. (450 psig) with ethylene. Ethylene was fed to the reactor on demand to, maintain the pressure at 31.03 bar (450 psig) for 1 hour. The stirrer and heating were then stopped and the reactor was rapidly depressurized. The autoclave was then opened and the solid

polyethylene was physically removed.

Table 2. Polymerization Data Related ito Components and Conditions

1 Precontact Time is defined as the contact time of the α«.?α-metallcene CH2=CHCH2CH2C(CH3)(Cp)(9-Flu)ZrCl2, triethylaluminum (TEA), and 1-hexene, which forms the precontacted mixture.

2 Postcontact Time is defined as the contact time between all four components, the ansa- metallocene CH2=CHCH2CH2C(CH3)(Cp)(9-Flu)ZrCl2, triethylaluminum (TEA), 1- hexene, and fluorided silica-alumina activator-support. This also represents the contact time between precontacted mixture and the fluorided silica-alumina activator-support.

3 Because the polymerization rate was decreasing at the end of the 49 minute run, the activity (g/g/hr) extrapolated to a per hour basis constitutes an overestimate of the activity. .

4 Neither the precontacted nor the postcontacted mixture contained any olefin monomer. Thus, the precontacted mixture contains the ύrøα-metallcene CH2=CHCH2CH2C(CH3)- (Cp)(9-Flu)ZrCl2, triethylaluminum (TEA), and heptane, but no 1-hexene. The postcontacted mixture contains the precontacted mixture, additional triethylaluminum (TEA), and fluorided silica-alumina, '

5 Precontacted mixture maintained in the dark.

6 Precontacted mixture sonicated while maintaining in the dark. In Table 2, Productivity is .the g of polymer/g of catalyst produced during that run, Catalyst Activity is the g of polymer/g of catalyst/unit time, and is a better comparison among runs, and Activator-Support Activity is the g of polymer/g of activator-support/unit time.

EXAMPLES 18-23 Comparative Catalytic Runs Varying the Metallocene, Comonomer, and Pendent Alkene of the Metallocene . - "- ' Examples 18-23 in Table 3 illustrate ethylene polymerization runs performed in a one-gallon autoclave reactor at 90-1000C, with two liters of isobutane diluent and triethylaluminum cocatalyst, as well . as the characterization data of the polymer resulting therefrom. Comonomer 1- hexene was added as indicated in this Table. Ethylene was fed on demand to maintain the specified pressure for the specified length of the polymerization run (Table 3). The specific details of each run are provided below.

EXAMPLE 18 . A stock solution of (CH3)2;C(9-Flύ)(Cp)ZrCl2 metallocene was prepared under a nitrogen atmosphere by charging 20 mg of (CH3)2C(9- FIu)(Cp)ZrCl2 to a dry, stir bar equipped glass vial, followed by 16 mL of dry, degassed heptane and 4 mL of 15 wt% triethylaluminum (TEA) in heptane. A rubber septum was placed- oh the vial, followed by a metal crimped cap. The stock solution was then stirred overnight. The polymerization reaction was carried out in a 1 -gallon autoclave as follows. Under an isobutane purge, 1 mL of 15 wt% triethylaluminum (TEA). in heptane and 200 mg of activator- support, immediately followed by 0.5 mL of the metallocene stock solution, were charged to the autoclave. The autoclave was sealed, and 2 liters of isobutane were added along with 40 g of 1-hexene. Stirring was initiated and maintained at 700 rpm as the reactor was heated to 900C over a period of 5 minutes. The total pressure was brought to 37.9 bar (550 psig) with ethylene. Ethylene was fed to the reactor on demand to maintain the pressure at 37.9 bar (550 psig). After 30 minutes, the stirrer and heating were then stopped and the reactor was rapidly depressurized. The autoclave was then opened and the solid polyethylene was physically removed.

EXAMPLE 19 A stock solution of CH2=CH(CH2)2C(CH3)(Cp)(9-Flu)ZrCl2 metallocene was prepared under a nitrogen atmosphere by charging 20 mg of CH2=CH(CH2)2C(CH3)(Cρ)(9-Flu)ZrCl2 /to a dry, stir bar equipped glass vial, followed by 16 mL of dry, degassed heptane and 4 mL of 15 wt% triethylaluminum (TEA) in heptane.. A rubber septum was placed on the vial, followed by a metal crimped cap. The stock solution was then stirred overnight. The polymerization reaction was carried out in a 1 -gallon autoclave as follows. Under an isobutane purge, 1 mL of 15 wt% triethylaluminum (TEA) in heptane and 200 mg of activator-support, immediately followed by 0.5 mL of the metallocene stock solution, was charged to the autoclave. The autoclave was sealed, and 2 liters of isobutane were added along with 40 g of 1-hexene. Stirring was initiated and maintained at 700 rpm as the reactor was heated to 9O0C over a period of 5 minutes, The total pressure was brought to 37.9 bar (550 psig) with ethylene. Ethylene was fed to the reactor on demand to maintain the pressure at 37.9 bar (550 psig). After 30 minutes, the stirrer and heating were then stopped and the reactor was rapidly depressurized. The autoclave was then opened and the solid polyethylene was physically removed. ••'■ ; . EXAMPXE .20 A stock solution of CH3(CH2)3C(CH3)(Cp)(9-Flu)ZrCl2 metallocene was prepared under a nitrogen atmosphere by dissolving 20 mg of CH3(CH2)3C(CH3)(Cp)(9-Flu)ZrCl2 in 20 mL of dry, degassed toluene. The polymerization reaction was carried out in a 1 -gallon autoclave as follows. Under an isobutane purge, 1 mL of ..'.15 wt% triethylaluminum (TEA) in heptane and 200 mg of activator-support, immediately followed by 1.0 mL of the metallocene stock solution, were charged to the autoclave. The autoclave was sealed and 2 liters of isobutane were added. Stirring was initiated and maintained at 700 rpm as. the reactor, was heated to 1000C over a period of 8 minutes. The total pressure was bf ought to 31.03 bar (450 psig) with ethylene. Ethylene was fed to the reactor on demand to maintain the pressure at 31.03 bar (450 psig). After 60 minutes, the stirrer and heating were then stopped and the reactor was rapidly depressurized. The autoclave was then opened and the solid polyethylene was physically removed.

EXAMPLE 21

A stock solution of CH2=CH(CH2)2C(CH3)(Cp)(9-Flu)ZrCl2 metallocene was prepared under a nitrogen atmosphere by dissolving 20 mg of CH2=CH(CH2)2C(CH3)(Cp)(9-Flu)Zr:Cl2. in 20 mL of dry, degassed toluene. The polymerization reaction was carried out in a 1-gallon autoclave as follows. Under an isobutane purge, 1 mL of 15 wt% triethylaluminum (TEA) in heptane and 200 mg of activator-support, immediately followed by 1.0 mL of the metallocene stock solution, were' charged to the autoclave. The autoclave was sealed and 2 liters of isobutane were added. Stirring was initiated and maintained at 700 rpm as the reactor, was. heated to 100°C over a period of 8 minutes. The total pressure was brought to 31.03 bar (450 psig) with ethylene. Ethylene was fed to the reactor on demand to maintain the pressure at 31.03 bar (450 psig). After 60 minutes, the, stirrer and heating were then stopped and the reactor was rapidly depressurized. The autoclave was then opened and the solid polyethylene was physically removed.

EXAMPLE 22 A stock solution of CH3(CH^)7(CH3)Si(FIu)2ZrCl2 metallocene was prepared under a nitrogen atmosphere by charging 30 mg of (Methyl)(n- octyl)Si(Flu)2ZrCl2 to a dry, stir bar equipped glass vial, followed by 4 mL of 15 wt% triethylaluminum (TEA) in heptane, 4 mL of dry, degassed 1-hexene, and 7 mL of dry-degassed heptane." A rubber septum was placed on the vial, followed by a metal crimp cap. The stock' solution was then stirred overnight in a dry box. The polymerization reaction was carried out in a 1 -gallon autoclave as follows. Under an isobutane purge, to the autoclave was charged 1 mL of 15 wt% triethylaluminum (TEA) in heptane immediately followed by 800 mg of the activator-support and.2.5 mL of the metallocene stock solution. The autoclave was sealed and 1.8 liters, of isobutane were added. Stirring was initiated and maintained at 900 rpm as the reactor was heated to 950C over a period of 15 minutes. The total pressure was brought to 20.68 bar (300 psig) with ethylene. Ethylene was fed to the reactor on demand to maintain the pressure at 20.68 bar (300 psig). After 2 hr, the stirrer and heating were then stopped and the reactor was rapidly depressurized. The autoclave was then opened and the solid polyethylene was physically removed.

EXAMPLE 23 A stock solution of GH2=CH (CH2)6(CH3)Si(Flu)2ZrCl2 metallocene was prepared under a nitrogen atmosphere by charging 30 mg of CH2=CH (CH2)6(CH3)Si(Flu)2ZrCl2 to a dry, stϊf bar equipped glass vial, followed by 4 mL of 15 wt% triethylaluminum (TEA) in heptane, 4 mL of dry, degassed 1- hexene and 7 mL of dry-degassed heptane. A rubber septum was placed on the vial, followed by a metal, crimp cap. The stock solution was then stirred overnight in a dry box. The polymerization reaction was carried out in a 1- gallon autoclave as follows. Under an isobutane purge, to the autoclave was charged 1 mL of 15 wt% triethylaluminum (TEA) in heptane immediately followed by 800 mg of the activator-support- and 2.5 mL of the metallocene stock solution. The autoclave was sealed, 1.8 liters of isobutane were added. Stirring was initiated and maintained at 900 rpm as the reactor was heated to 950C over a period of 15 minutes. .The total pressure was brought to 20.68 bar (300 psig) with ethylene. • Ethylene was fed to the reactor on demand to maintain the pressure at 20.68 bar (300 psig). After 2 hr, the stirrer and heating were then stopped and the reactor was rapidly depressurized. The autoclave was then opened and the solid polyethylene was physically removed, ■ Consistent with the Carreau-Yasuda a parameters in (Table 3) and a plot of zero shear viscosity vs. weight average molecular weight (Figure 5), comparative examples 18, 20 and 22, containing no tethered olefmic moiety in the metallocene structure, contain more LCB than inventive examples 19, 21, and 23, respectively, that contain tethered olefin moieties. ■ . . ■ . ' . ■ ■ ■ ■ £ ."

■ iQ2 Table 3 Polymerization data for polymerizations performed in autoclave reactor and characterization data of the resulting polymer.

A. Example number and type, O 5 B. Type of αrøα-metalloccnc used as shown in Figure 1. C. Weight of metallocene charged to reactor (mg) D. Type of organoahrmvnum cocatalyst used; TEA = tnethyklumrnum; I mL of 15 wt% triethylaluminum (TEA) in heptane used in each case. E Activator-support charge (mg); type of solid-oxide used was fluorided Davison sflica-alurnina (F-SA) calcined at 5000C. F Reactor run pressure (psig) , 37.9 bar (550 psig ), 31.03 bar (450 psig), 20.68 bar (300 psig). 10 G. Reactor run temp ("C). H. Reactor run time (minutes). I. 1-Hexene charged to reactor after isobutene (grams) L Polymer yield (grams) K. Mw/1000 15 L Mn/1000. M. MwMn, polydispersiry index. N. Log (Mw). O. η(0); standard exponential notation, for example, 2.51E+05 = 2.5 Ix 105 P. log (η(0)). 20 Q Carreau-Yasuda a parameter