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6946531 |
Low molecular weight ethylene interpolymers and polymerization process
Low molecular weight olefin polymers are prepared by a polymerization process employing titanium complexes comprising a 3-aryl-substituted cyclopentadienyl ring or substituted derivatives thereof...
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6943133 |
Diene functionalized catalyst supports and supported catalyst compositions
The present invention relates to functionalized catalyst supports that are useful in the formation of supported polymerization catalysts, supported catalysts derived from such functionalized...
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6943224 |
Process for preparing supported transition metal catalyst systems and catalyst systems prepared thereby
A process for forming a coordination catalyst system comprising sequentially or substantially simultaneously contacting: (I) pre-catalyst reactants comprising (a) at least one first...
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6943225 |
Multinuclear metallocene catalyst
The present invention relates to a multinuclear metallocene catalyst for olefin polymerization and a process for olefin polymerization using the same, in which the multinuclear metallocene catalyst...
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6943227 |
Catalyst for olefin polymerization and method of polymerization of olefin
The present invention provides a catalyst for olefin polymerization having high olefin polymerization activity without being accompanied by generation of an adhered polymer on the wall of a...
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6939929 |
Alpha-olefin-aromatic vinyl copolymer
The α-olefin-aromatic vinyl compound copolymer of the present invention is obtained by using a transition metal compound represented by the following Formula (1) and a promoter component to carry...
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6939928 |
Metallocene compound, process for producing metallocene compound, olefin polymerization catalyst, process for producing polyolefin, and polyolefin
The metallocene compound according to the invention and the olefin polymerization catalyst containing the compound are intended to produce a catalyst capable of preparing an isotactic polymer with...
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6936667 |
Polymerization catalyst compositions and processes to produce polymers and bimodal polymers
A process to produce a first catalyst composition is provided. The process comprises contacting at least one first organometal compound and at least one activator to produce the first catalyst...
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6930156 |
Polymer bound single-site catalysts
A single-site catalyst is disclosed. The catalyst comprises a transition metal complex, an activator, and an allylic alcohol-containing polymer. The catalyst has high activity and great capability...
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6930157 |
Catalyst composition for preparing olefin polymers
A catalyst composition for preparing olefin polymers. The catalyst composition includes a metallocene compound and an activating cocatalyst. In the metallocene compound, two cyclopentadienyl groups...
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6930158 |
Substituted polycyclic cyclopentadienes and method for their preparation
New polycyclic cyclopentadiene compounds having the formula (II) wherein the various substituents and symbols R1, R2, R3, R4, R5, R6, R7, Z1 and Z2 and “n” have the meaning specified in the...
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6924248 |
Catalyst system for carrying out olefin polymerization comprising a calcined hydro-talcite serving as a supporting material
Catalyst system for olefin polymerization comprising
A) at least one calcined hydrotalcite, B) at least one organic transition metal compound, C) optionally one or more cation-forming compounds...
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6919412 |
Monocyclopentadienyl complexes of chromium, molybdenum or tungsten with a donor bridge
Substituted monocyclopentadienyl, monoindenyl, monofluorenyl or heterocyclopentadienyl complexes of chromium, molybdenum or tungsten, wherein at least one of the substituents of the...
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6919414 |
Copolymers and films thereof
Novel copolymers comprise ethylene and alpha olefins having from 3 to 10 carbon atoms and which have
(a) a density in the range 0.900 to 0.940 (b) Mw/Mn of 2-3.4 (c) I 21 /I 2 from 16 to 24...
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6914108 |
Catalyst component for addition polymerization, catalyst for addition polymerization, and process for producing addition polymer
An electron-withdrawing group-containing metal compound (I) of an atom of the Group III to the Group XII or lanthanide series of the Periodic Table of the Elements, a catalyst component for...
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6911516 |
Copolymers of ethylene with c3-c12 α-olefins
Copolymers of ethylene with C 3 -C 12 α-olefin have a polydispersity Mw/Mn of ≦10, a density of from 0.85 to 0.95 g/cm 3 , a proportion of from 1 to 40% by weight of comonomer and a molar mass...
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6911508 |
Class of metallocenes and method of producing polyethylene
The invention provides a catalyst system and a method of making polyethylene using the catalyst system, the method comprising combining ethylene; an activator; and a metallocene catalyst compound;...
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6908968 |
Narrow MWD, compositionally optimized ethylene interpolymer composition, process for making the same and article made therefrom
A polymer composition comprises at least two polymer components, the first component having an ATREF peak temperature, T peak1 , and a viscosity average molecular weight, M v1 , and the second...
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6908972 |
Method for making polyolefins
A method for making ethylene polymers and copolymers is disclosed. The method uses a catalyst system comprising a low level of an aluminum-containing activator, a bridged indenoindolyl transition...
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6908974 |
Catalyst composition and a process for preparing linear, isotactic polymers
The invention concerns a metallocene catalyst composition for preparing linear isotactic polymers, wherein said catalyst composition contains a metal complex and an activator. The invention also...
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6908973 |
Single-site catalysts for olefin polymerization
A method for making single-site catalysts useful for olefin polymerization is disclosed. A nitrogen-functional heterocycle is first deprotonated with an alkyllithium compound, followed by reaction...
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6908876 |
Supported metallocene catalyst system for olefin polymerization, method for making and using the same
The present invention relates to a supported catalyst system for olefin polymerization which comprises at least one metallocene component and a support of an inorganic oxide of silica, aluminum or...
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6903170 |
Olefin polymerization process using triisobutylaluminum as a scavenger
Ethylene and optional comonomers are polymerized using a supported metallocene catalyst, an alumoxane activator, and triisobutylaluminum (TIBAL). A silica support is first pretreated with a silane...
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6900343 |
Method for the purification of metallocenes
A process for purifying metallocenes in which a sparingly soluble metallocene halide is converted into a readily soluble and readily crystallizable metallocene by replacement of at least one halide...
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6894131 |
Polymerization process using a metallocene catalyst system
Provided is a process for polymerizing olefins in the presence of a metallocene catalyst compound having at least one fluoride or fluorine containing leaving group. More particularly, the present...
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6894129 |
Multinuclear half metallocene catalyst and preparation of styrene polymer using the same
The present invention relates to a catalyst for preparing vinyl aromatic polymer and styrene polymerization using the same, and particularly to a transition metal half metallocene catalyst with a...
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6891006 |
Yttrium-based ethylene polymerization catalysts with bulky amidinate ancillary ligands
A cationic Group 3 or Lanthanide metal complex for coordination polymerization of olefins is disclosed. The precursor metal complex is stabilized by an anionic amidinate ancillary ligand. Upon...
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6891004 |
Transition metal catalyst component for polymerization, and method for producing a polymer by means thereof
A transition metal catalyst component for polymerization, composed of a metal complex comprising specific ligands and a specific substituted boron group and having a bridging group, which exhibits...
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6887958 |
Method for polymerizing olefins
Ethylene or propylene are copolymerized with one another or with other olefinically unsaturated compounds in the presence of a catalyst system comprising the following components:
A) a complex of...
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6887818 |
Supported titanium catalyst system
A supported titanium catalyst system comprising a titanium catalyst bound via at least one heteroatom, a functionalized support, said heteroatom being connected to said support via an organic group.
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6887819 |
Compositions that can produce polymers
This invention provides compositions that are useful for polymerizing at least one monomer into at least one polymer.
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6884857 |
Olefin polymerization process using supported constrained geometry catalysts
Metal complexes having constrained geometry and a process for preparation thereof, addition polymerization catalysts formed therefrom, processes for preparation of such addition polymerization...
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6884749 |
Supported catalysts which reduce sheeting in olefin polymerization, process for the preparation and the use thereof
Olefin polymerization in the presence of heterogeneous supported catalysts is improved by incorporating into the supported catalyst a unifunctional hydrophobic tether comprising a hydrophobic...
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6881695 |
Olefin polymerization catalyst and method for producing modified methylaluminoxane for use as olefin polymerization catalyst
An olefin polymerization catalyst is provided which makes use of a modified methylaluminoxane and thus stably exhibits an activity equivalent to, or higher than, the activity achieved by...
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6878779 |
Cross-copolymerized olefin/aromatic vinyl compound/diene copolymer and process for its production
A highly uniform vinyl compound polymer-cross-copolymerized olefin/styrene/diene copolymer excellent in processability, mechanical properties, high temperature properties, compatibility and...
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6878786 |
Process for the polymerization of olefins
Process for the polymerization of olefins comprising contacting olefins under polymerization conditions in the presence of a catalyst system comprising the product obtained by contacting:
...
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6875829 |
Single-site catalysts containing chelating N-oxide ligands
A single-site olefin polymerization catalyst and method of making it are disclosed. The catalyst comprises an activator and an organometallic complex. The complex comprises a Group 3 to 10...
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6875879 |
Olefin polymerization catalysts containing triquinane ligands
A catalyst system useful for polymerizing olefins is disclosed. The catalyst system comprises an activator and an organometallic complex that incorporates a Group 3 to 10 transition metal and at...
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6872844 |
Metal complexes containing acetylenic ligands, polymerization catalysts and addition polymerization process
A complex of a Group 3-10 metal, said complex comprising a cyclic group containing delocalized electrons, a bridging group connecting he metal with the cyclic group, and acetylene or a derivative...
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6872791 |
Polyolefin nano-composite
Disclosed herein is a polyolefin nanocomposite prepared by polymerizing an olefin monomer in a catalyst system comprising (1) a supported catalyst consisting of a polymer, a silicate clay mineral,...
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6872790 |
Alpha olefin polymer products and catalyst systems
The present invention provides a method for varying the melting points and molecular weights of polyolefins by changing the structure of the catalyst used in the polymerization. The catalysts that...
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6870016 |
Polymerization process and polymer composition
Olefin polymerization processes using catalyst systems based on metallocenes and olefin, in particular, propylene polymers obtainable thereby. The metallocenes may be represented by the formula:
...
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6870017 |
Transition metal compound, catalyst for addition polymerization, and process for producing addition polymer
A catalyst for addition polymerization obtained by bringing the following (A) into contact with (B) a specific organic aluminum compound and/or aluminoxane, and (C) a specific boron compound, and a...
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6870015 |
Catalyst component for addition polymerization, process for producing catalyst for addition polymerization and process for producing addition polymer
There are provided: (I) a catalyst component for addition polymerization comprising: (i) a transition metal compound having (a) two cyclopentadiene type anion skeleton-carrying groups, which are...
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6867276 |
Vinylaromatic polymers having high melt flow
A process for preparing syndiotactic polymers of vinylaromatic monomers having improved melt flowability comprising contacting one or more vinylaromatic monomers with a catalyst system comprising a...
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6864332 |
Process for the gas phase polymerization and copolymerization of olefin monomers
A process for polymerizing monomers in the gas phase, in fluidized bed reactors is described, where unsaturated, gas phase monomers are fed into the reactors in the presence of a mixture of inert...
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6861384 |
Process for preparation of a salt-like chemical compound and its use in catalyst systems for preparing polyolefins
A process for preparing salt-like compounds of the formula (1),
(C 6 R 1 15 ) 3 MR 2 (I)
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6861543 |
Process for the preparation of ep(d)m elastomeric copolymers and terpolymers
A process is described for the preparation of elastomeric EP(D)M copolymers and terpolymers, characterized in that it is carried out in the presence of metallocene compounds of general formula (I)...
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6861487 |
Catalyst precursor for the polymerization of olefins and polymerization process using the same
The present invention relates to a catalyst precursor for homo- or copolymerization of olefins comprising a metallocene compound, a magnesium containing compound and a thermoplastic polymer...
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6858765 |
Polyolefin wax for coating materials and printing ink composition
A polyolefin wax for a coating material which includes an ethylene (co)polymer having a number-average molecular weight within the range of from 400 to 5000 as measured by gel permeation...
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