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Matches 651 - 700 out of 5,686

Document Document Title
WO/1999/009077A1
This invention relates to the controlled molecular weight production of macromonomers and polymers with terminal conjugated double bonds from starting monomers including, but not limited to, substituted butadienes. The terminal diene end...  
WO/1999/007745A1
There is provided a process for producing polydienes, such as polybutadiene and polyisoprene, in a gas phase fluidized bed reactor using a pre-activated nickel catalyst which is highly active for cost effective production of these dienes...  
WO/1999/006448A1
The invention concerns a catalyst system based on fulvene metal complexes (metallocene), which have been activated with a Lewis acid free from aluminoxan and boron, and its use for polymerising unsaturated compounds, in particular for po...  
WO/1999/003901A1
A process is provided for low bed level polymerization, using sound waves to prevent reactor fouling and/or sheeting. The process is useful during reactor start-up, polymer product transitioning, and for polymer residence time control in...  
WO/1998/058972A1
A novel series of copolymers and terpolymers, useful as base oils for synthetic lubricants, are produced by polymerization of ethylene, an alpha-olefin, and optionally a third monomer comprising an alpha-olefin of 3 to 20 carbon atoms, i...  
WO/1998/056836A2
The invention relates to electrets produced on the basis of cycloolefin copolymers (COC) and characterized by long-term stability of the charges applied thereto, even at high temperatures and high relative air humidity. Cycloolefin copol...  
WO/1998/055517A1
The invention relates to a process for making functionalized polymers, comprising the steps of: initiating polymerization of one or more unsaturated monomers with an initiator having structure (1), wherein R?1�, R?2� and R?3� are i...  
WO/1998/052984A1
The invention relates to a method for anionic polymerisation of dienes or of dienes and vinyl aromatic monomers in a vinyl aromatic monomer or mixture of monomers to form homopolydienes or copolymers or mixed homopolydienes and copolymer...  
WO/1998/051714A1
A new shortstopping agent for use in stopping free radical polymerizations is N-ethylhydroxylamine or salts thereof (EHA). It is as effective as related hydroxylamines, but is much less volatile so that it tends to remain with the polyme...  
WO1998039369A3  
WO/1998/048913A1
The present invention describes a chromatographic method for separating polynucleotides with improved separation and efficiency. The method uses nonporous polymeric beads having a non-reactive, non-polar surface, and made from a variety ...  
WO/1998/039283A1
A process for producing solid, powdery carboxylates of Rare Earths (RE) elements, among them mainly Nd, La, Pr and Ce, where the ligands coordinated to the metal are long-chain, branched carboxylic acids is provided. Preferably, the carb...  
WO/1998/039369A2
The invention relates to half-sandwich metallocene catalysts of formula (I) and their use for stereospecific polymerization or copolymerization of an olefin of the formula R?a�CH=CHR?b� wherein R?a� and R?b� can be hydrogen, an u...  
WO/1998/036004A1
The present invention relates to a novel catalyst system, the use thereof in the polymerization of dienes in a solution, suspension and vapour phase, and the use of diene rubbers produced therewith, exhibiting a high cis content, an aver...  
WO1998030587A3  
WO/1998/033830A1
$g(a)-olefin-cycloolefin copolymers which (1) consist essentially of 0-31 % by mole of an $g(a)-olefin component represented by formula (A) wherein R?1� is a hydrogen atom or a saturated aliphatic hydrocarbon group of 1-16 carbon atoms...  
WO/1998/031739A1
A process for preparation of a microgel comprising reacting an alkoxyamine with an unsaturated monomer composition comprising a cross-linking agent comprising at least two double bonds and optionally one or more further monomers selected...  
WO1998007765A3
A continuous anionic polymerisation or copolymerisation process of styrene or diene monomers with alkali metal alkyl as polymerisation initiator is carried out in the presence of a metal alkyl or aryl of an at least bivalent element as r...  
WO/1998/030587A2
Supported metal halides and metal halide solid acids are used as catalysts for the polymerization of a feed stream containing at least one of pure monomer, C5 monomers, and C9 monomers to produce hydrocarbon resins. Freely-associated wat...  
WO/1998/030520A1
Metal oxide solid acids are used as catalysts for the polymerization of a feed stream containing at least one of pure monomer (e.g., styrene based monomers), C5 monomers, and C9 monomers to produce hydrocarbon resins. Freely-associated w...  
WO/1998/030519A1
Solid acids are used as catalysts for the polymerization of a feed stream containing at least one of pure monomer, C5 monomers, and C9 monomers to produce hydrocarbon resins. Freely-associated water may be removed from the solid acid cat...  
WO/1998/030521A1
Fluorinated solid acids and supported fluorinated solid acids are used as catalysts for the polymerization of a feed stream containing at least one of pure monomoer, C5 monomers, and C9 monomers to produce hydrocarbon resins. Freely-asso...  
WO/1998/020049A1
There is provided a method for terminating a gas phase polymerization of a compound selected from the group consisting of a conjugated diene, a vinyl-substituted aromatic compound, and mixtures thereof, in a polymerization vessel in the ...  
WO/1998/007766A1
A process is disclosed for anionically polymerising dienes or for copolymerising dienes and vinyl aromatic monomers in a vinyl aromatic monomer or monomer mixture into homopolydienes or copolymers or mixed homopolydienes and copolymers i...  
WO/1998/007765A2
A continuous anionic polymerisation or copolymerisation process of styrene or diene monomers with alkali metal alkyl as polymerisation initiator is carried out in the presence of a metal alkyl or aryl of an at least bivalent element as r...  
WO/1998/002465A1
Protected, functionalized heterotelechelic polymers, hydrogenated and/or deprotected analogues thereof, and processes to prepare these polymers. Monomers are polymerized using a protected funtionalized initiator to form a living polymer,...  
WO/1998/001483A1
Cycloolefin copolymers for use in optical data memories can be produced by (co)polymerising monomers from the group of cyclic olefins, of $g(a)-olefins with 2 or more C atoms and optionally conjugated or unconjugated diolefins, wherein m...  
WO/1998/001487A1
Elastomers can be produced by (co)polymerising monomers from the group of C�2?-C�8?-$g(a)-olefins, C�4?-C�15?-diolefins and other monomers in the solid phase, in solution, as a slurry or in gas phase where metallocene compounds o...  
WO/1998/001485A1
High melting-point polyolefins can be produced as such, in solution, suspension or gas phase, metallocene compounds of formula (I) or $g(p)-complex compounds of formulas (I) or (XIII) being used as catalysts. In said formulas: CpI and Cp...  
WO/1998/001484A1
Cycloolefin copolymers for technical applications except for using in optical data storage devices can be produced by (co)polymerising monomers from the group of cyclic olefins, of $g(a)-olefins with 2 or more C atoms and conjugated or u...  
WO/1998/001486A1
Thermoplastic elastomers can be produced by (co)polymerising monomers from the group of C�2?-C�8?-$g(a)-olefins, C�4?-C�15?-dioledins and other monomers in the solid phase, in solution, as slurry or in the gas phase where metallo...  
WO/1997/048731A1
Protected, functionalized telechelic polymers, hydrogenated and/or deprotected analogues thereof, and processes to prepare these polymers are disclosed. In the invention, a lithium initiator is added to a compound having at least two ind...  
WO/1997/047630A1
The invention relates to a process for preparing triorganylstannyl lithium compounds from bis-triorganylstannyl oxides R3Sn-O-SnR3, and use of said triorganylstannyl lithium compounds. According to said process, the bis-triorganylstannyl...  
WO/1997/046599A1
The present invention teaches the use of particular soluble metallocene catalysts to produce stereoregular polymers in gas phase polymerizations wherein the catalysts are fed into a particle lean zone in the reactor. The metallocenes cat...  
WO/1997/046593A1
The invention features a method for preparing telechelic 1,3-diene oligomers that consists in effecting the free radical polymerization of at least one 1,3-diene with a heat sensitive polymerization initiator such as hydrogen peroxide in...  
WO/1997/042017A1
A process for producing dip-coated articles in which a heated moulding with an electrolyte adsorbing surface is dipped into an aqueous latex preparation, the latex of which is stabilised substantially by emulsifiers with anionic sulphona...  
WO/1997/036944A1
The present invention is a free radical bulk polymerization process for producing a rubber modified polymer from a vinyl aromatic monomer comprising: polymerizing the vinyl aromatic monomer in the presence of a diene rubber having at lea...  
WO/1997/036894A1
The present invention is a compound of formula (I) wherein T is a group which will either 1) react with a polydienyl lithium such that the polydiene will be terminated with the compound of formula (I), or 2) be displaced by a polydienyl ...  
WO/1997/033923A1
A process for the preparation of vinylic polymers, which comprises conducting an anionic polymerization wherein the metal of the cation counter to the carb-anion of the propagation terminal is Mg or Mg/M1 (wherein M1 is at least one alka...  
WO/1997/031028A1
A diene rubber comprising a conjugated diene polymer or a conjugated diene/aromatic vinyl copolymer having a quaternary ammonium group bearing four carbon atoms bonded to the nitrogen atom at least one end of the polymer chain which has ...  
WO/1997/026282A1
The present invention relates to macromonomer compounds having the formula (I) where R1 is hydrogen, halogen, and optionally substituted alkyl, aryl, alkylaryl or arylalkyl radical; R2 and R3, which can be similar or different, are hydro...  
WO/1997/026239A1
Vinyl monomers having polyenic side chains derived from highly unsaturated fatty acids represented by general formula: R1COOH (wherein R1 is a C9-C25 hydrocarbyl having 3 to 6 unsaturated bonds) and derivatives thereof. Such a vinyl mono...  
WO/1997/025299A1
Free radical reaction of unsaturated material, dissolved in a polar, water immiscible organic solvent, and perfluoroalkyl iodide in the presence of buffer or means for adjusting pH of aqueous phase.  
WO/1997/023520A1
A process for the preparation of hydrocarbon solutions of monofunctional ether initiators of the following general structure: M-Qn-Z-O-[A(R1R2R3)] wherein M is an alkali metal selected from the goup consisting of lithium, sodium and pota...  
WO/1997/023521A1
The process of this invention can be utilized to synthesize polymers having a high trans microstructure. The polymers which can be prepared utilizing the procedure of this invention include high trans-1,4-polybutadiene, styrene-isoprene-...  
WO/1997/016465A1
This invention concerns novel, unsymmetrically protected, telechelically functionalized linear and star or multi-arm polymers, their optionally hydrogenated analogues, the polymers produced by selective removal of the protecting groups, ...  
WO/1997/015603A1
An emulsion polymer is disclosed by the present invention. In particular, the emulsion polymer comprises a protective colloid and a functionalized silane component which is formula (I) wherein R'' is C1-C5 alkyl, R' is C1-C5, R is SH, CH...  
WO/1997/008211A1
By utilizing the vapor phase polymerisation techniques of the present invention, numerous distinct and highly beneficial advantages are realized. For instance, cis-1,4-polybutadiene and high cis-1,4-polybutadiene rubber having a consiste...  
WO/1997/005174A1
Hetero-telechelic polymers having the formula (I): FG-(Q)d-Z-J-[A(R1R2R3)]x wherein FG is a protected or non-protected functional group; Q is a saturated or unsaturated hydrocarbyl group derived by incorporation of a compound selected fr...  
WO/1997/005179A1
The present invention provides novel, multi-arm or star-shaped polymers having mixed protected functional and non-functional ends, their optionally hydrogenated analogues, and the polymers produced by removal of the protecting groups. Th...  

Matches 651 - 700 out of 5,686