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WO/2008/058839A2 |
A process for the multistage polymerization of olefins comprising a gas-phase polymerization carried out in at least two serially connected gas-phase reactors, the continuous discharge of polymer and gas reaction mixture from an upstream...
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WO/2008/059065A1 |
The invention relates to a coordination compound of an element of the boron group, the production of said compound, and the use thereof as an additive, stabilizer, catalyst, co-catalyst, activator for catalyst systems, conductivity impro...
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WO/2008/052992A1 |
The present invention concerns alternative feedstocks for ethene/a-olefin copolymerization.
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WO/2008/052943A1 |
The present invention relates to a process for improving the devolatilization of polymer slurry produced in an olefin polymerization reactor. The process is characterized in that it involves an adjustment of the temperature of the interi...
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WO/2008/054117A1 |
Disclosed herein is a group IV transition metal catalyst for producing an ethylene homopolymer or an ethylene-olefin copolymers, having high catalytic activity, which includes a cyclopentadiene derivative and one or more anionic ligands ...
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WO/2008/049551A1 |
The sagging problem in the manufacture of thick walled pipes is solved using a polyethylene molding composition having a multimodal molecular mass distribution and comprising from 45 to 55 % by weight of a first low molecular weight ethy...
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WO/2008/047957A1 |
Disclosed is an arylphenoxy catalyst system for producing an ethylene homopolymer or copolymers of ethylene and α-olefins, and a method of producing an ethylene homopolymer or copolymers of ethylene and α-olefins having a high molecula...
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WO/2008/047860A1 |
Disclosed is a highly pure, terminal-unsaturated olefin polymer which is produced by the homopolymerization of an α-olefin having 3 to 28 carbon atoms, the copolymerization of two or more α-olefins each having 3 to 28 carbon atoms, or ...
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WO/2008/047173A1 |
The invention relates to a catalyst for the heterogeneous phase polymerisation of conjugated dienes and olefins, comprising a pre-catalyst consisting of a mixture of metallocene hydride-aluminohydride compounds: (CpRx)Ty(CpR'z)MHAIH4 (I)...
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WO/2008/043388A1 |
Use of a catalyst composition treated with a surface modifier in the polymerization of olefins for lowering the gel content in the resulting polyolefin, wherein the surface modifier has a polar residue capable of interacting with the sur...
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WO/2008/042037A1 |
Disclosed herein is an in-reactor produced multi-component copolymer comprises a semi- crystalline component having a crystallinity of 20% or more, and an amorphous component having a crystallinity of 5% or less. The copolymer comprises ...
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WO/2008/038173A2 |
According to the present invention there is provided a process for producing a polymenc (including oligomenc) product by the polymerisation (including oligomeπsation) of at least one olefinic compound, by contacting the at least one ole...
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WO/2008/037630A1 |
Catalyst precursors comprising Mg, Ti, OMe and OR groups that are in molar ratios defined by the formula MgTin(OMe)(p)(OR)x in which n is from 0.1 to 1, p is ≥(2+4n), x is from 0 to 1 and R is C2- C15 hydrocarbon groups can be easily t...
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WO/2008/036591A2 |
A composition useful for activating catalysts for olefin polymerization is provided. The composition is derived from at least; carrier containing water; organoaluminum compound; N.N-dimethylaniline and pentaflurophenol in amounts such th...
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WO/2008/036594A2 |
Compositions useful for activating catalysts for olefin polymerization are provided. The compositions are derived from at least carrier having at least two hydrogen bonded hydroxyl groups, organoaluminum compound, Lewis base, and Bronste...
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WO/2008/031890A1 |
This invention relates to fluorinated alkoxy-imino metallic complexes and their use in catalyst systems for the polymerisation or oligomerisation of ethylene and alpha-olefins. The metallic complex results from the metallation reaction o...
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WO/2008/031894A1 |
This invention relates to the fluorinated dialkoxy-diimine metal complexes prepared by reacting MX4 (M is a metal of group 4 and X: halogen, alkyl or benzyl) with a ligand defined by the general formula: 1. A fluorinated dialcohol-diimin...
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WO/2008/030294A1 |
In some embodiments, a method including the steps of: during a polymerization reaction producing a polymer resin in a fluid bed reactor, measuring reaction parameters including at least reactor temperature, at least one property of the r...
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WO/2008/026635A1 |
Disclosed is catalytic cracking by using a fluid catalytic cracking apparatus having a reaction zone, a separation zone, a stripping zone and a reproduction zone. In the reaction zone, a feed oil comprising a hydrocarbon separated from a...
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WO/2008/025212A1 |
A process for preparing butyl rubber involves that the mixture of iso-monoolefin, conjugated diene and diluent together with the mixture of initiator and diluent is fed into the hypergravity reactor in a specific proportion to carry out ...
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WO/2008/026681A1 |
Disclosed is catalytic cracking by using a fluid catalytic cracking apparatus having a reaction zone, a separation zone, a stripping zone and a reproduction zone. A synthetic product produced by a FT synthesis method is separated into a ...
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WO/2008/027116A1 |
A process for polymerizing propylene is provided. The process comprises contacting propylene and optionally one or more monomers with a catalyst system comprising a bis-indenyl Group 4 metallocene compound supported on silica, the silica...
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WO/2008/022900A1 |
A method for preparing a catalytic composition for the olefin polymerization in the form of a dispersion of catalyst particles in a semi-fluid matrix, characterized in that it comprises the steps of: a) forming a suspension of catalyst p...
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WO/2008/022430A1 |
A magnesium titanium olefin polymerization procatalyst is prepared by A) reacting a diorganomagnesium compound with a source of active chlorine, (with the proviso that the amount of chlorine is insufficient to completely convert the dior...
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WO/2008/019802A1 |
The instant invention relates to a process for preparing a catalyst component for the polymerization of olefins. Catalysts prepared with this catalyst component provide a high mileage for the production of polyolefin with a high bulk den...
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WO/2008/018976A1 |
This invention relates to a process for maintaining heat transfer capacity of a cycle cooler while polymerizing olefin(s) in the presence of catalyst and a carboxylate metal salt by controlling the amount of carboxylate metal salt presen...
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WO/2008/015160A1 |
The present invention discloses metallic complexes based on oxime-ether ligand and their use in oligomerisation and in polymerisation of ethylene and alpha-olefins.
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WO/2008/015228A2 |
A process to perform the finishing of polyolefins produced by gas-phase catalytic polymerization of one or more α-olefms in the presence of a polymerization diluent selected from a C3-C5 alkane, wherein the polyolefm granules discharged...
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WO/2008/016174A1 |
The invention relates to a polyolefin composition. The polyolefin composition can be in the form of a multi-layer, microporous polyolefin membrane comprising a first microporous layer containing 7% or less by mass of ultra-high-molecular...
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WO2006052232A9 |
This invention relates to the field of olefin polymerization catalyst compositions, and methods for the polymerization and copolymerization of olefins, including polymerization methods using a supported catalyst composition. In one aspec...
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WO/2008/016478A2 |
A method for controlling sheeting in a gas phase reactor that includes producing a polyolefin with at least one metallocene catalyst and at least one static control agent in at least one gas phase reactor, measuring entrainment static us...
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WO/2008/012144A1 |
Propylene polymers having specific values of total comonomer content and melting temperature, articles obtained therefrom, in particular extrusion blow molded articles, and gas-phase process for obtaining said propylene polymers.
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WO/2008/013144A1 |
Disclosed is an ethylene polymer particle which can be obtained by a solid phase process such as solid phase drawing, and is suitable for producing a molded article having high strength. Specifically disclosed is an ethylene polymer part...
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WO/2008/010862A1 |
The invention is directed to a process for producing polyolefins by one or more homogeneous or colloidal polymerization catalyst wherein residual catalyst is removed by using a solid sorbent.
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WO/2008/011269A2 |
A composition useful for activating catalysts for olefin polymerization Is provided. The composition is derived from at least: carrier; treated organoaluminoxy compound: and ionic compound having at feast one active proton.
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WO/2008/010911A1 |
A process and apparatus for gas phase polymerization of olefins in a fluidized bed reactor are disclosed. The process and apparatus employ a vertically oriented fines ejector in order to reduce fouling and reactor downtime.
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WO/2008/010459A1 |
A solid titanium catalyst ingredient comprising magnesium, titanium, a halogen, and a specific ester compound; a catalyst for olefin polymerization which comprises the solid titanium catalyst ingredient and an organometallic compound cat...
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WO/2008/011267A2 |
A composition useful for activating catalysts for olefin polymerization is provided. The composition is derived from at least: carrier; organoaluminoxy compound; N,N- dimethylaniline and pentaflurophenol in amounts such that them are at ...
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WO2007107189B1 |
This invention relates to the field of impact copolymers and their preparation in a single reactor.
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WO/2008/008111A1 |
Provided are a propylene polymer compositions comprising a propylene copolymer and a propylene homopolymer polymerized in the presence of the propylene copolymer. The propylene polymer compositions exhibit properties such as broad molecu...
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WO/2008/006609A2 |
The present invention relates to a Ziegler-Natta catalyst comprising a solid, ligand-modified catalyst component formed at least from (a) a compound of Group 1 to 3 of the Periodic Table (IUPAC), (b) a transition metal compound of Group ...
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WO/2008/006530A1 |
Short-chain-branched polypropylene having xylene solubles of at least 0.5 wt.-%.
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WO/2008/004628A1 |
Disclosed is a rare earth metal complex represented by the following formula (1). (1) (In the formula, A represents a group 14 element of the periodic table; Cp represent a substituted or unsubstituted group having a cyclopentadienyl typ...
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WO/2008/000808A1 |
The present invention relates to a catalytic chemical reaction process, wherein the chemical reaction process is performed in a process stream comprising at least 50 wt% organic compounds, a homogeneous catalyst based upon cobalt, nickel...
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WO/2008/001772A1 |
[PROBLEMS] To provide a stretch-molded ultra-high-molecular-weight polyolefin sheet having excellent transparency and mechanical properties while being relatively thick, and others. [MEANS FOR SOLVING PROBLEMS] It becomes possible to pro...
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WO/2007/147740A1 |
Catalyst component for the polymerization of olefins comprising Mg, Ti, halogen and an electron donor is obtained by a batch process comprising: (A) A first step comprising reacting an adduct of formula MgCl2(ROH)n, where R is a C1-C10 a...
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WO/2007/149262A2 |
A process for polymerizing ethylene is disclosed. The process comprises polymerizing ethylene in the presence of a catalyst system which comprises a bridged indenoindolyl transition metal complex on a support material, an alkylalumoxane,...
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WO/2007/147715A1 |
Catalyst components for the polymerization of olefins comprising Mg, Ti, halogen and 1,3- diethers as internal donors having an improved balance of properties in terms of activity and morphological stability are obtained by a process com...
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WO/2007/147714A1 |
Catalyst precursors comprising Mg, Cl, Ti, and OR groups that are in molar ratios defined by the formula MgClnTip(OR)(2-n ) +4p in which n is from 0.3 to less than 1.7, p is lower than 0.6, the molar ratio (OR)/Cl is lower than 4 and R i...
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WO/2007/147864A2 |
The present invention relates to a process for the production of propylene polymers in the presence of a blend of a first Ziegler-Natta catalyst, which comprises a titanium compound having at least one titanium-halogen bond and a diether...
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