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7390861 |
Cationic group-3 catalyst system
A cationic Group 3 or Lanthanide metal complex for coordination polymerization of olefins is disclosed. The precursor metal complex is stabilized by an anionic multidentate ancillary ligand and two...
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7387980 |
Methods of using heterocycle-amine ligands, compositions, complexes, and catalysts
Ligands, compositions, and metal-ligand complexes that incorporate heterocycle-amine compounds are disclosed that are useful in the catalysis of transformations such as the polymerization of...
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7388062 |
Group IIIb metal complexes with “constrained geometry” fluorenyl based ligands
The present invention discloses a metallocene catalyst component based on a Group IIIb metal of the periodic Table and a bridged heteroatom-fluorenyl ligand. It also discloses its method of...
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7384886 |
Methods of preparation of an olefin oligomerization catalyst
A method of making a catalyst for use in oligomerizing an olefin comprising a chromium-containing compound, a pyrrole-containing compound, a metal alkyl, a halide-containing compound, and...
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7378474 |
Olefin polymerization catalyst
The present invention provides an olefin polymerization catalyst composed of a late transition metal complex exhibiting high olefin polymerization activity and also provides a method for producing...
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7371803 |
Catalyst composition II
This invention relates to a transition metal catalyst compound represented by the formula: LMX 2 or (LMX 2 ) 2 wherein each M is independently a Group 7 to 11 metal, preferably a Group 7, 8, 9,...
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7365039 |
Morphology controlled olefin polymerization process
A catalyst composition, method of formation and process of use in the polymerization of olefin monomers, said composition comprising a catalyst compound, an activator capable of converting said...
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7365140 |
Transition metal carbene complexes containing a cationic substituent as catalysts of olefin metathesis reactions
Organometallic complexes suitable as olefin metathesis catalysts are provided. The complexes are Group 8 transition metal carbenes bearing a cationic substituent and having the general structure...
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7358209 |
Polymerisation catalysts
A transition metal complex having the following Formula (A): wherein the monovalent groups R 1 and R 2 are —R a , —OR b , —NR c R d , and —NHR e : the monovalent groups R a , R b , R c ,...
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RE40234 |
Process for producing crystalline poly-α-olefins with a monocyclopentadienyl transition metal catalyst system
The invention is a catalytic process using a Group IV B transition metal component and an alumoxane component to polymerize α-olefins to produce high crystallinity and high molecular weight...
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7351845 |
Transition metal polymerization catalysts, their synthesis and use in olefin polymerization
A transition metal ligand complex has the following formula:
wherein R 1 and R 2 (each occurrence) independently represent an aryl, alkyl, or cycloalkyl group having up to 20 carbon atoms; R...
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7345127 |
Living radical polymerization of halogen-containing and acrylic monomers and the formation of block copolymers therefrom
Acrylic polymers are made by the living radical polymerization of acrylic monomers utilizing organo halide initiators with either metal-free or metal catalysts. Moreover, block copolymers of vinyl...
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7335716 |
Ethylene (co)polymers and uses thereof
An ethylene (co)polymer of the present invention is a (co)polymer with excellent moldability and mechanical properties and either an ethylene homopolymer or a copolymer of ethylene and an α-olefin...
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7332550 |
Stabilization of transition metal complexes for catalysis in diverse environments
This present invention is directed towards the identification or design, preparation, and use of suitable transition metal complexes for use as catalysts. The transition metal complexes may...
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7329758 |
Imidazolidine-based metal carbene metathesis catalysts
The present invention relates to novel metathesis catalysts with an imidazolidine-based ligand and to methods for making and using the same. The inventive catalysts are of the formula
wherein:
...
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7326756 |
High temperature bulk polymerization of branched crystalline polypropylene
Branched crystalline polypropylene compositions and methods for the preparation of branched crystalline polypropylene compositions are provided. For example, described herein is a process of...
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7319083 |
Polymerized catalyst composition
A composition is provided that includes a product of combining, in the presence of a free radical initiator a catalyst precursor and at least one monomer wherein the monomer and the catalyst...
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7312285 |
Method for preparing norbornene based addition polymer containing ester or acetyl functional group
The present invention relates to a method for preparing a cyclic olefin polymer by addition polymerization, and more particularly to a method for preparing a norbornene-based addition polymer,...
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7312284 |
Process for producing polar olefin copolymer and polar olefin copolymer obtained thereby
A process for producing a polar olefin copolymer comprises copolymerizing a non-polar olefin and a polar olefin in the presence of a transition metal compound selected from Groups 4, 5, 6 and 11 of...
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7300901 |
Hollow beads of polyethylene
The present invention discloses a method for preparing hollow beads of polyethylene of controlled morphology and size.
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7300990 |
Zwitterionic polymers
Polymers may be made from zwitterionic monomers having controlled architectures and molecular weights, using living polymerisations such as group or atom transfer radical polymerisation. For...
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7300903 |
Olefin polymerization catalysts, transition metal compounds, processes for olefin polymerization, and α-olefin/conjugated diene copolymers
The invention provides a process using olefin polymerization catalysts exhibiting excellent polymerization activities. The olefin polymerization catalysts of the invention contain a transition...
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7297806 |
Manufacture of alpha-olefins
Alpha-olefin are manufactured in high yield and with very high selectivity by contacting ethylene with an iron complex of a selected 2,6-pyridinedicarboxaldehyde bisimine or a selected...
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7285607 |
Polymerisation of olefinic compounds
This invention relates to a process for producing a polymeric product by the polymerisation of at least one olefinic compound in the form of an olefin or a compound including an olefinic moiety by...
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7273914 |
Olefin polymerization methods
Methods for making polyolefins are disclosed. One method comprises polymerizing an olefin in the presence of a catalyst system comprising a single-site complex, an agglomerated metal oxide/clay...
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7271231 |
Polymerization of olefins
Disclosed herein are processes for polymerizing ethylene, acyclic olefins, and/or selected cyclic olefins, and optionally selected olefinic esters or carboxylic acids, and other monomers. The...
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7268243 |
Bis(salicylaldiminato)titanium complex catalysts, highly syndiotactic polypropylene by a chain-end control mechanism, block copolymer containing this
Bis(salicylaldiminato)titanium complex with optionally substituted phenyl or cyclohexyl on nitrogen catalyzes highly syndiospecific polymerization of propylene. Syndiotactic polypropylene with...
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7262258 |
Process for producing copolymer
There are provided (I) a process for producing a copolymer of ethylene, an α-olefin having from 3 to 20 carbon atoms and optionally a polyene, which comprises the step of copolymerizing those...
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7259214 |
Metal catalyst for olefin polymerization and co-polymerization with functional monomers
A catalyst is disclosed for the polymerization and co-polymerization of olefins with functionalized monomers. The catalyst is formed from a combination of two neutral metal complexes, L( i Pr 2...
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7253133 |
Catalyst for polymerization or copolymerization of olefins, preparation and use of the same
Catalysts and catalyst systems useful for the olefin polymerization and copolymerization, and their synthesis procedure and usage are disclosed. These catalyst are a kind of novel complexes formed...
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7247687 |
Late transition metal catalysts for olefin polymerization and oligomerization
This invention relates to a transition metal compound represented by the formula LMX wherein M is a Group 3 to 11 metal L is a bulky bidentate or tridentate neutral ligand that is bonded to M by...
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7241715 |
Bridged bi-aromatic ligands, catalysts, processes for polymerizing and polymers therefrom
New ligands and compositions with bridged bis-aromatic ligands are disclosed that catalyze the polymerization of monomers into polymers. These catalysts with metal centers have high performance...
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7238756 |
Polymerization process and control of polymer composition properties
Methods of controlling the flow index and/or molecular weight split of a polymer composition are disclosed. The method of producing a polymer composition in one embodiment comprises incorporating a...
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7229943 |
Polymerisation and oligomerisation catalysts
A polymerisation catalyst comprising (1) a transition metal compound of Formula A,
and optionally (2) an activating quantity of a Lewis acid activator. Z is a five-membered heterocyclic group...
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7230056 |
Catalyst preparation method
A two-step catalyst preparation method is disclosed. First, a support is combined with an indenoindolyl Group 3-10 metal complex and a first activator comprising an alkyl alumoxane to give a...
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7220805 |
Process for producing contact product; catalyst component for addition polymerization; process for producing catalyst for addition polymerization; and process for producing addition polymer
There are provided (1) a process for producing a contact product, which comprises the step of contacting at least a phthalocyanine complex, a porphyrin complex, or their combination with a...
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7214747 |
Phosphorus substituted metallocene compounds for olefin polymerization
This invention relates to a metallocene compounds represented by formula:
wherein
M is a group 3, 4, 5 or 6 transition metal atom, or a lanthanide metal atom, or actinide metal atom; E is an...
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7214748 |
Process for the production of an azo-catalyst for the polymerization of olefins
The present invention relates to a process for the production of a catalyst by reacting metal compounds with azo ligands, the catalyst, the use of this catalyst as a polymerization catalyst, a...
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7214749 |
Catalyst system for high activity and stereoselectivity in the homopolymerization and copolymerization of olefins
The present invention is directed to a novel composition, and to a method of making the composition, the composition being useful in catalyst systems for the homopolymerization and/or...
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7214746 |
Phosphorus bridged metallocene compounds for olefin polymerization
This invention relates to metallocene compounds represented by formula:
wherein
M is a group 3, 4, 5 or 6 transition metal atom, or a lanthanide metal atom, or actinide metal atom; E is a...
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7214755 |
Crystalline polymer of higher α-olefin and process for producing the same
A crystalline higher α-olefin polymer which is obtained from a C 10 or more α-olefin and satisfies either (1) the melting point (Tm) as measured with a differential scanning calorimeter (DSC) is...
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7205364 |
Olefin polymerization catalysts
The invention is a catalyst system including a Group IV B transition metal component and an alumoxane component which may be employed to polymerize olefins to produce a high molecular weight polymer.
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7202315 |
Process for the preparation of ethylene polymers
A process for polymerizing ethylene comprising contacting under polymerization condition ethylene and optionally one or more olefins with a catalyst system obtainable by contacting: a bis amido...
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7196148 |
Cationic catalyst system
A 3+ metal complex for coordination polymerization of olefins is disclosed. The precursor metal complex is stabilized by a anionic multidentate ligand and at least two monoanionic ligands. The...
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7196032 |
Fluoroalcohol leaving group for non-metallocene olefin polymerization catalysts
A catalyst composition and method for olefin polymerization are provided. In one aspect, the catalyst composition is represented by the formula α a β b γ g MX n wherein M is a metal; X is a...
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7196147 |
Olefin polymerization process with improved operability and polymer properties
Ethylene and optional comonomers are polymerized in the presence of an organozinc compound and a catalyst system to produce an ethylene polymer. The catalyst system comprises a bridged...
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7193024 |
Alpha-Olefin based branched polymer
A polymer comprising units ( 1 ) derived from an alpha-olefin having at least 3 carbon atoms ( 1′ ), units ( 2 ) derived from divinylbenzene or C 1-10 hydrocarbyl substituted derivatives thereof...
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7172986 |
Catalytic composition and its preparation and use for preparing polymers from ethylenically unsaturated monomers
A catalytic composition, including a cationic metal-pair complex, is disclosed, along with a method for its preparation. A method for the polymerization of ethylenically unsaturated monomers using...
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7169729 |
Use of zinc derivatives as cyclic ester polymerization catalysts
The invention concerns the use of zinc derivatives of general formula (I) wherein: L 1 represents a group of formula: —E 14 (R 14 )(R′ 14 )(R″ 14 ), —E 15 (R 15 ) (R′ 15 ) or —E 16 (R...
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7169863 |
Salts of lewis acid/acid adducts and catalyst activators therefrom
A compound useful as a cocatalyst or cocatalyst component, especially for use as an addition polymerization catalyst compound, corresponding to the formula: (A* +a ) b (Z*J* j ) −c d , wherein:
...
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