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7208559 |
Ethylened polymer and molded object obtained therefrom
An ethylene-based polymer which is an ethylene/C4 to C10 α-olefin copolymer and satisfies the following requirements [k1] to [k3]: [k1] melt flow rate (MFR) under a loading of 2.16 kg at 190° C....
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7172988 |
Catalyst component for ethylene polymerization, a process for preparing thereof and catalyst comprising the same
A catalyst component for ethylene polymerization, including an inorganic oxide support, and at least one alkyl metal compound, at least one halide, at least one dihydrocarbyl magnesium compound, at...
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7148302 |
Catalyst for polymerization of norbornene
This invention is based upon the discovery that a catalyst system which is comprised of (a) palladium or a palladium compound and (b) a fluorinated alcohol is effective for polymerizing...
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7122611 |
Catalyst for polymerization of norbornene
This invention is based upon the discovery that a catalyst system which is comprised of (a) palladium or a palladium compound and (b) a fluorinated alcohol is effective for polymerizing...
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7081505 |
Activating organometallic composition for the (co) polymerization of alpha-olefins comprising fluorinated cyclopentadienyl compounds
An organometallic composition which can be used as activating component in a metallocene catalyst for the (co)polymerization of α-olefins, comprises: (A) a fluorinated di-unsaturated cyclic...
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6911507 |
Processes for producing cycloolefin addition polymer
A cyclic olefin having a specific polar group is polymerized by addition polymerization in a hydrocarbon solvent, using a polymerization catalyst component containing (i) a specific transition...
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6713585 |
Enhanced-impact LLDPE with a shear modifiable network structure
The present invention provides an ethylene copolymer resin that has unique melt elastic properties not observed in ethylene copolymers heretofore known. Specifically, the ethylene copolymer resin...
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6642325 |
Silica gel-supported catalyst component for ethylene (co)polymerization, catalyst therefrom and use of the same
The present invention relates to a silica gel-supported catalyst component suitable for ethylene (co)polymerization, a catalyst therefrom and use of the same. The catalyst component according to...
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6608152 |
Process for the polymerization of olefins; novel polyethylenes, and films and articles produced therefrom
A novel process for the polymerization of olefins is provided. The process involves contacting at least one olefin with a Ziegler-Natta type catalyst in the presence of a specified compound that...
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6573344 |
Propylene polymerization process
A process to produce a propylene polymer is provided. The process comprising contacting at least one organometal compound, at least one organoaluminum compound, at least one treated solid oxide...
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6433237 |
Iron-based catalyst composition for producing oligomers of conjugated dienes
A catalyst composition that is the combination of or the reaction product of ingredients comprising (a) (i) a halogen-containing iron compound or (ii) an iron-containing compound and a...
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6391990 |
Method of producing conjugated diene polymer
A conjugated diene polymer is produced by continuously polymerizing a conjugated diene monomer with a catalyst consisting essentially of components (1): a lanthanoid compound, (2): an aluminoxane...
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6384162 |
Process for production of olefin polymer with long chain branching
A process for production of an ethylene-propylene-diene-methylene (EPDM) tetrapolymer having long chain branching is described. The process comprises the step of polymerizing a monomer mixture...
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6252021 |
Process for producing polyisobutene using a catalytic system comprising transition metal-benzene derivative compound-methylaluminoxane
This invention relates to a process for polymerizing isobutene using a catalytic system comprising a transition metal compound, a benzene derivative compound, and methylaluminoxane, and the...
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6184316 |
Catalyst and process for the syndiotactic polymerization of vinylaromatic compounds
A catalyst for the polymerization of vinylaromatic monomers, and particularly styrene, with a high yield and a high syndiotacticity index, comprises the product consisting of the following two...
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6180554 |
Catalyst system for the production of olefin (co)polymers
The present invention relates to a catalyst system comprising: a) an organoaluminum compound, b) a metal compound selected from subgroups IV to VI of the periodic system, c) a reactivator...
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6015841 |
Initiator systems containing vanadium tetrachloride for the (co)polymerization of isoolefins
This invention relates to an initiator system for the polymerization of isoolefins having 4 to 16 carbon atoms, optionally with monomers polymerizable with isoolefins, the system consisting of or...
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6013746 |
Process for controlling the molecular weight distribution of high 1,4-cis polybutadiene
This invention relates to a process for controlling the molecular weight distribution of high 1,4-cis polybutadiene and more particularly, to a process of easily controlling the molecular weight...
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6011128 |
Process for conditioning a gas-phase reactor to produce an ethylene-propylene or ethylene-propylene-diene rubber
There is provided process for producing an ethylene-alpha-olefin polymer at a polymerization reaction temperature in excess of the softening temperature of the polymer in a gas-phase fluidized-bed...
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5922632 |
Vanadium based components and catalysts for the polymerization of olefins and polymerization processes using the same
Catalysts component of the (co)polymerization of alpha-olefins CH 2 CHR, wherein R is hydrogen or an alkyl radical having from 1 to 8 carbon atoms, comprising a product of the composition: ...
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5811499 |
Synthesis of cis-1,4-polybutadiene rubber in presence of cobalt containing catalyst system
It has been determined that 1,3-butadiene monomer can be polymerized into cis-l,4-polybutadiene rubber utilizing a cobalt-based catalyst system which is comprised of (a) an organocobalt compound,...
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5783645 |
Non-sticky prepolymerized catalyst, and use thereof in production of non-sticky resin
A colorable resin particle having an outer shell of a non-sticky polymer and an inner core of a sticky polymer produced in a gas phase fluidized bed reactor at or above the sticking temperature of...
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5780570 |
Process for the preparation of polymeric mixtures based on EP (D) M elastomer copolymers
Process with two or more steps for the preparation in suspension of mixtures of ethylene-propylene (EPM) elastomer homopolymers or ethylene-propylene-diene (EPDM) elastomer terpolymers in the...
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5733835 |
Cobalt containing catalyst system
It has been determined that 1,3-butadiene monomer can be polymerized into cis-1,4-polybutadiene rubber utilizing a cobalt-based catalyst system which is comprised of (a) an organocobalt compound,...
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5728641 |
Catalyst component for the polymerization of olefins
According to the present invention there are provided a catalyst component, a catalyst using the catalyst component and a process using the catalyst, for the preparation of olefin polymers high in...
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5686543 |
Process for producing polybutadiene rubber
A process for producing a polybutadiene rubber having a cis-1,4 content of 94% or more, a ratio of weight average molecular weight to number average molecular weight of 2.5 to 3.5 as measured by a...
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5596053 |
High trans-1,4-polybutadiene and catalyst and process for preparing crystalline high trans-1,4-poly-butadiene
Diene polymers having a high content of trans-1,4 addition and two distinct melting points in the ranges of 30° C. to 50° C. and 70° C. to 130° C. are prepared by polymerizing a 1,3-diene...
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5516862 |
Process for producing ethylene-alpha-olefin copolymer rubber
A process for producing ethylene-α-olefin copolymer rubbers which comprises mixing a vanadium compound-containing solution and an alcohol-containing solution with stirring for 10-600 seconds to...
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5502125 |
Process for preparing ethylene copolymers
An olefin copolymer is prepared by copolymerizing ethylene, an α-olefin and, optionally a diene having non-conjugated double bonds by solution polymerization in the presence of: (a) an...
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5502127 |
Process for production of homogeneous polyethylene
A process for the production of a homogeneous polyethylene comprising contacting a mixture comprising ethylene, one or more alpha-olefins, and one or more unconjugated dienes, under polymerization...
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5492983 |
Catalysts and process for the preparation of catalysts which may be used for the polymerization of ethylene
This catalyst consists of the reaction product, with at least one organomagnesium compound and/or organolithium compound R 1 Li (R 1 =alkyl) or ArLi (Ar=phenyl or benzyl), of the reaction product...
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5491208 |
Ethylene-propylene elastomeric copolymers with a low content of residual chlorine
In an improved process for producing elastomeric ethylene-propylene copolymers with a propylene content comprised within the range of from 22 to 38% by weight and a content of residual chlorine,...
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5424379 |
Process for selective production of cis-1,4-polybutadiene
A catalyst for production of 1,4-polybutadiene which comprises as the catalyst component (A) a transition metal compound represented by the formula M(R) l (OR') m X n -(l+m), wherein M denotes a...
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5405924 |
Imido transition metal complex metathesis catalysts
An olefin metathesis catalyst system and process for the metathesis polymerization of cyclic olefins, such as dicyclopentadiene, are disclosed. The catalyst system comprises the reaction product...
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5349034 |
Process for selective production of trans-1,4-polybutadiene
A catalyst for production of 1,4-polybutadiene which comprises as the catalyst component (A) a transition metal compound represented by the formula M(R)l(OR')m X n -(l+m), wherein M denotes a...
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5278305 |
Catalysts for ring-opening, metathesis polymerization of cyclic olefins
A catalyst and process for the polymerization of cyclic olefins, such as dicyclopentadiene, are disclosed. The catalyst comprises the reaction product of a transition metal halide and a...
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5276118 |
Diaryl carbinol metathesis catalysts for ring-opening polymerization of cyclic olefins
A catalyst and process for the metathesis polymerization of cyclic olefins, such as dicyclopentadiene, are disclosed. The catalyst comprises the reaction product of a transition metal halide...
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5260245 |
High activity polyethylene catalysts
A catalyst for producing higher flow index linear low density polyethylene with relatively narrower molecular weight distributions is described. The catalyst is formed by treating silica having...
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5248745 |
Copolymerization of dicyclopentadiene with norbornene derivatives
A process for the production of thermoset copolymers having tailored product properties such as high glass transition temperature and/or increased cross-linking, the process comprising contacting a...
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5235011 |
Polyolefin polymerization process, method of producing catalyst, and catalyst
A process for preparing a polymerization catalyst useful for the polymerization of olefins is provided comprising contacting a metal dihalide compound wherein the metal is selected from Group 2 and...
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5147950 |
In-mold polmerization of cyclic olefins with borohydride cocatalyst
A catalyst and process for the polymerization of cyclic olefins, such as dicyclopentadiene, are disclosed. The catalyst includes a transition metal compound and a borohydride co-catalyst, with...
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5146028 |
Olefin polymerization catalyst and process of polymerization
Improved lower α-olefin polymerization catalysts are produced from an organoaluminum cocatalyst, a selectivity control agent and a specified magnesium-containing, titanium-containing,...
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5100982 |
Technique for reducing the molecular weight and broadening the molecular weight distribution of high cis-1,4-polybutadiene
High cis-1,4-polybutadiene can be synthesized by polymerizing 1,3-butadiene monomer with a three component nickel catalyst system containing (a) an organonickel compound, (b) an organoaluminum...
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5093443 |
Alpha-olefins polymerization with chlorinated alcohol-containing catalyst composition
A supported alpha-olefin polymerization catalyst composition is synthesized by reacting (1) a slurry of a solid catalyst carrier in a non-polar solvent, e.g., hexane, with a dialkyl organomagnesium...
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5082908 |
Ethylene-α-olefin copolymer and process for producing the same
An ethylene-α-olefin copolymer is disclosed, which comprises ethylene and an α-olefin having from 3 to 10 carbon atoms, has an ethylene/α-olefin molar ratio of from 88/12 to 98/2, and which has...
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4981760 |
Ethylene-alpha-olefin copolymer and films obtained therefrom
An ethylene-α-olefin copolymer comprising ethylene and an α-olefin having from 3 to 10 carbon atoms, the copolymer having an α-olefin content of from 1.0 to 8.0 mol %, a density of from 0.900 to...
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4960743 |
Method for production of catalyst carrier for polymerization of olefin
A method for the production of a catalyst carrier for use in the polymerization of an olefin, which method comprises causing a magnesium-containing solid obtained by contact of (A) magnesium metal,...
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4959427 |
Catalyst component for polymerization of olefins
A catalyst component for the polymerization of olefins which is prepared by contacting a reaction product of dihydrocarbyl magnesium and a halogen-containing alcohol held in contact with a titanium...
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4954470 |
Chlorinated alcohol-containing catalyst composition for polymerizing alpha-olefins
A supported alpha-olefin polymerization catalyst composition is synthesized by reacting (1) a slurry of a solid catalyst carrier in a non-polar solvent, e.g., hexane, with a dialkyl organomagnesium...
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4945143 |
Allyloxy activated coating compositions
Allyloxy activated surface coatings of free radical-polymerizable compounds having fugitive acid stabilized metal drier and peroxide free radical initiator form durable films over urethane substrates.
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