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6670434 |
Catalytic complexes and their use for polymerizing alpha-olefins
A complex of a transition metal complying with the general formula (I) in which M is a transition metal of groups 6 to 12, T is the oxidation state of M, each A, which may be identical with or...
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6667386 |
Water-soluble transition metal complexes
Water-soluble transition metal complexes of the formula (I) where R 1 to R 4 are linear or branched C 2 - to C 28 -alkyl, C 3 - to C 14 -cycloalkyl or alkylaryl where the alkyl moiety is of 1...
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6664350 |
Supported polymerisation catalyst
The invention relates to supported ligands and catalysts for use in the polymerization of olefinically unsaturated monomers such as vinylic monomers, comprising the use of a compound attached to...
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6653424 |
Norbornene open-ring polymers, products of hydrogenation thereof and processes for the production of both
Using a polymerization catalyst comprising as a main ingredient a metal compound containing a transition metal of group 6 of the periodic table and having at least one imide group and at least...
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6653413 |
Process for the production of stereoregular polymers and elastomers of alpha-olefins and certain novel catalysts therefor
A process for the polymerization of one or more alpha-olefins having at least 3 carbon atoms, which comprises contacting the monomer or monomers in a polar or non-polar solvent under polymerization...
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6649558 |
Bis-phosphinimine catalyst
Organometallic complexes having two phosphinimine ligands and at least one activatable ligand are catalyst components for olefin polymerization. Preferred polymerization systems are prepared by...
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6646107 |
Process for producing polymer
The object of the present invention is to produce a polymer, which is free from the troubles of the coloration and the decrease in the mechanical properties of molded articles (films, etc.),...
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6646071 |
Metal complexes containing bridging heteroatom for olefin-polymerization-process
Metal complexes comprising an oxygen, sulfur, or nitrogen containing bridging group which are useful as catalyst components for the polymerization of olefins.
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6642327 |
Late transition metal complexes, their use as catalysts and polymers therefrom
The invention provides a novel metal complex which, when used with an activating cocatalyst, provides a novel catalyst composition. The invention also provides a polymerization method which...
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6635733 |
Elastomeric polypropylene
An elastomeric polypropylene wherein (a) an isotactic pentad (I 5 ) is 0.150-0.749, (b) a different bond due to a 2,1-insertion reaction is 0.11-20 mol %, (c) a different bond due to a...
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6635728 |
Preparation of ultra-high-molecular-weight polyethylene
A process for making an ultra-high-molecular-weight polyethylene (UHMWPE) is disclosed. The process is performed with a supported quinolinoxy-containing single-site catalyst in the presence of a...
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6630551 |
Catalyst for olefin polymerization and process for producing olefin polymer with the catalyst
A catalyst which comprises a compound of a transition metal in Groups 8 to 10 of the Periodic Table having a nitrogenous tridentate ligand, a clay, clay minteral, or lamellar ion-exchanging...
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6630550 |
Olefin polymerization catalyst
A catalyst for olefin polymerization of the formula: R″(C 4 R′ m C 5 C 4 R′ n )XMeQ wherein X is an hetero atom ligand with one or two lone pair electrons selected from the elements of Group...
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6627711 |
Transition metal donor complexes and olefin polymerization process
A process for polymerization of addition polymerizable monomers with a catalyst composition comprising a Group 4 or 5 metal bis(silane)amido complex corresponding to the formula: where the...
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6624265 |
Ruthenium metal alkylidene complexes coordinated with triazolylidene ligands that exhibit high olefin metathesis activity
The invention discloses ruthenium alkylidene complexes of the type (PCy 3 )(L)Cl 2 Ru(CHPh), where L is a triazolylidene ligand of the general formula: These catalysts have been found to be...
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6620896 |
Mixed olefin polymerization catalysts, processes employing such catalysts, and polymers obtained therefrom
Mixed olefin polymerization catalysts, methods for preparing olefin polymers using the catalysts, and polymers obtained therefrom are disclosed. The mixed catalyst system comprises the combination...
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6617407 |
Bis(n,n-dihydrocarbylamino)-substituted cyclopentadienes and metal complexes thereof
This invention relates to bis(N,N-dihydrocarbylamino)-substituted derivatives of cyclopentadienes (Cp) and metal complexes thereof which find utility as olefin polymerization catalyst components.
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6613851 |
Catalyst for the polymerization of olefins
The invention relates to the use of cyclic carbene-η-ligand complexes for catalysis of olefin polymerization.
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6605677 |
Olefin polymerization processes using supported catalysts
Improved Group 8-10 transition metal based supported catalyst processes for the polymerization of olefins are described. Some of the improvements pertain to protocols for catalyst preparation and...
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6596826 |
Olefin polymerization catalysts containing 1,3-diboretanyl ligands
An olefin polymerization catalyst system and method of making it are disclosed. The catalyst system comprises an activator and an organometallic complex. The complex comprises a Group 3 to 10...
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6596827 |
Method for catalytic polymerization of alpha-olefin monomers using an ultra-high activity non-metallocene pre-catalyst
Disclosed are olefin polymerization methods comprising the use of the following compounds: wherein M is a metal atom, R 1 -R 8 are univalent radicals, X 1 and X 2 are univalent ligands, X 3 ...
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6593440 |
Palladium (II) catalyzed polymerization of norbornene and acrylates
Homopolymers or copolymers of acrylates, homopolymers or copolymers of norbornenes, and copolymers of acrylates with norbornenes, may be prepared by contacting acrylate and/or norbornene monomer...
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6593437 |
Metal organic catalysts for polymerizing unsaturated compounds
A process for preparing 1,2-diimine compounds of the formula I where R 1 and R 2 are, independently of one another, alkyl, aryl or metallocenyl radicals, and R 3 , R 4 are, independently of...
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6593438 |
Catalyst composition and method of polymerization
This invention relates to a composition of matter comprising the catalyst compound comprising a transition metal complexed with a facially coordinating tridentate bisamide ligand. The invention is...
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6586530 |
Low surface tension (meth) acrylate containing block copolymer prepared by controlled radical polymerization
A block copolymer including a block of residues of a low surface tension (meth)acrylate monomer; a block of residues of a monomer free of hydroxyl group and amine group residues; and, optionally, a...
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6586545 |
Complexes based on four-membered cyclic anionic six-electron-donor 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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6583236 |
Polyolefin compositions having enhanced ultraviolet and oxidative resistance and methods for their production and use
The invention discloses a method for dispersing a metathesis catalyst in an olefin to produce a catalyst-monomer mixture having a desired catalyst:monomer ratio comprising dispersing the catalyst...
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6583242 |
Supported olefin polymerization catalysts
A supported olefin polymerization catalyst system and a method of making it are disclosed. The catalyst system comprises: (a) a support having mean particle size less than about 30 microns...
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6579957 |
Single-site catalysts based on anionic thiopyran dioxide ligands
Single-site catalysts useful for polymerizing olefins are disclosed. The catalysts incorporate a Group 3 to 10 transition, lanthanide, or actinide metal and an anionic thiopyran dioxide ligand....
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6576731 |
Polybutadienes with a reduced solution viscosity/mooney viscosity ratio
The invention relates to a process for the preparation of polybutadienes with a reduced solution viscosity/Mooney viscosity ratio by using polydienyl compounds, the polybutadienes which can be...
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6576724 |
Catalytic composition and process for the catalysis of dimerization codimerization and oligomerization of olefins
A catalytic composition for the dimerization, the codimerization or the oligomerization of olefins results from the dissolution of at least one nickel complex that contains a heterocyclic carbene...
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6573345 |
Catalyst compositions and processes for olefin oligomerization and polymerization
The present invention is directed to processes of polymerizing olefin monomers and copolymerizing olefin monomer(s) with functionalized alpha-olefin monomers in the presence of certain late...
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6569966 |
Method of preparation of ethylene copolymers suitable for manufacturing films and pipes
Method of preparation of ethylene copolymers suitable for manufacturing films or pipes so characterized that for the initiation of polymerization of ethylene and 1-alkene monomer a substantially...
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6559251 |
Process for making low-density polyolefins
A process for making ethylene copolymers is disclosed. Ethylene copolymerizes with an α-olefin in the presence of a catalyst system comprising an activator and a silica-supported, bridged...
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6555636 |
Polymerisation catalyst
A catalyst composition for the polymerization of radically polymerisable monomer is disclosed, which comprises (i) an initiator having a radically transferable atom or group and (ii) a component of...
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6555634 |
Di- and tri-heteroatom substituted indenyl metal complexes
Novel metal complexes containing at least two heteroatoms attached to an indenyl or substituted indenyl radical which is bridged by ligand group thereby forming a covalent or coordinate/covalent...
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6548611 |
Elastic substantially linear olefin polymers
Substantially linear olefin polymers having a melt flow ratio, I 10 /I 2 , ≧5.63, a molecular weight distribution, M w /M n , defined by the equation: M w /M n ≦(I 10 /I 2 )−4.63, and a...
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6545112 |
Process for producing β-butyrolactone homopolymer or copolymer
The object of the invention is to provides a process in which a high-molecular-weight β-butyrolactone homopolymer or copolymer being biodegradable, absorbable into the living body, useful as a...
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6545108 |
Catalysts containing N-pyrrolyl substituted nitrogen donors
Catalyst compositions useful for the polymerization or oligomerization of olefins are disclosed. Certain of the catalyst compositions comprise metal complexes of mono through tetradentate ligands...
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6541580 |
Atom or group transfer radical polymerization
A process for ATRP polymerization and coupling of molecules by radical processes is provided, wherein improvements are provided by selection of various ligands, counterions, transition metal...
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6541583 |
Polypropylene preparation
A propylene polymerization process is disclosed. The process gives polypropylene having isotactic and atactic stereoblock sequences. The process is performed in the presence of a non-bridged...
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6531424 |
Polymerization of olefins
Olefins, such as ethylene, are polymerized using as a polymerization catalyst a complex of a selected transition metal with a monoanionic ligand that has at least three atoms that may coordinate to...
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6525154 |
Molecular imprinting for the recognition of peptides in aqueous solution
Molecularly imprinted polymers (MIPs) wherein the template comprises either a) a peptide or amino acid sequence that has an N-terminal histidine residue or b) histamine. The MIP's may be prepared...
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6521724 |
Polymerization process
Processes for the polymerization of olefins in which late transition metal complexes, such as nickel, iron, cobalt and palladium complexes, are used as a polymerization catalyst have improved...
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6518379 |
Method of producing rubber compositions in styrene solutions with sterically superior chelate catalysts
In a process for polymerizing dienes in a solvent comprising vinylaromatic monomers, the polymerization is carried out in the presence of a metal compound of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo or W as...
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6515155 |
Substituted group 4 metal complexes, catalysts and olefin polymerization process
Group 4 metal complexes of the constrained geometry type, catalysts derived therefrom and polymerization processes using the same, characterized by a nitrogen containing aliphatic or cycloaliphatic...
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6511936 |
Catalyst compounds with β-diminate anionic ligands and processes for polymerizing olefins
The present invention relates to catalyst systems, processes for making such catalysts, intermediates for such catalysts, and olefin polymerization processes using such catalysts wherein such...
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6511934 |
Transition metal precursors containing sulfur ligands, and polyolefin production processes using them
A catalyst composition for the polymerization of olefins is provided, comprising a transition metal precursor containing sulfur ligands and an activating co-catalyst.
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6506858 |
Olefin polymerization catalyst material and process for its preparation
A process for the preparation of a catalyst material and the resultant catalyst material. The process comprises the steps of: (a) treating a particulate support material with an alkylating agent;...
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6500909 |
Transition metal compound, catalyst component for olefin polymerization, catalyst for olefin polymerization, and process for producing olefinic polymer
A transition metal compound represented by the general formula (2) or (3) described below, a catalyst component for olefin polymerization comprising said transition metal compound, a catalyst...
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