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| Number | Title | Issue Date |
| 7008899 | Lanthanide-based catalyst composition for producing cis-1,4-polydienes A catalyst composition that is the combination of or the reaction product of ingredients comprising (a) a lanthanide compound, (b) an organoaluminum hydride, and (c) a tin halide compound. ... | 03/07/2006 |
| 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 a polymer containing hydroxyl groups. The support is modified with an... | 06/21/2005 |
| 6777371 | Ni catalysts and methods for alkane dehydrogenation Catalysts and methods for alkane oxydehydrogenation are disclosed. The catalysts of the invention generally comprise (i) nickel or a nickel-containing compound and (ii) at least one or more of titanium (Ti), tantalum (Ta), niobium (Nb), hafnium (Hf), tungsten (W), y... | 08/17/2004 |
| 6683018 | Method for producing a supported catalyst system A process for the preparation of a supported catalyst system, an inorganic carrier material being reacted with a metal compound of the formula in the presence of an inert solvent in a first step and, in a subsequent step, the suspension thus obtained being rea... | 01/27/2004 |
| 6528596 | Modified particles, catalyst for olefin polymerization, and process of producing olefin polymer A modified particles obtained by contacting particles(a) with a metal compound(b) selected from the group consisting of compounds of the Group VI, VII, XIV metal elements and compounds of the lanthanide series, and contacting the particles with a compound... | 03/04/2003 |
| 6300271 | Compositions that can produce polymers This invention provides a compositions that are useful for polymerizing at least one monomer into at least one polymer.... | 10/09/2001 |
| 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 components in contact with each other: A) an η5 -c... | 02/06/2001 |
| 6184338 | Anionic polymerization initiators containing tertiary amine functionality, their chain extended analogues, and processes for using the same The present invention provides novel anionic polymerization amine initiators having a tertiary amine group pendant to the polymer chain and processes for making the same. The initiators can be useful in the preparation of tertiary amine containing polymer... | 02/06/2001 |
| 6165929 | Compositions that can produce polymers A process is provided to produce a composition of matter. The process comprises contacting at least one organometal compound, at least one solid mixed oxide compound, and at least one organoaluminum compound to produce the composition.... | 12/26/2000 |
| 6147025 | Metallocene catalyst composition and process for activating a metallocene procatalyst A metallocene catalyst is provided which comprises the product obtained by combining (a) a metallocene procatalyst, preferably one containing a bridging group possessing at least two bulky groups, and (b) a cation-generating cocatalyst. A process for acti... | 11/14/2000 |
| 6136744 | Process for producing polyolefin elastomer employing a metallocene catalyst A cation-generating cocatalyst is provided for activating a metallocene procatalyst. The cocatalyst comprises (1) a metal- and/or metalloid-containing first component, e.g., an aluminum compound, (2) a neutral metal- and/or metalloid-containing second com... | 10/24/2000 |
| 6127305 | Catalyst and process for polymerizing alpha-olefins An active catalyst in the polymerization of alpha-olefins is obtained by: (i) bringing a dialkyl magnesium, or an alkyl magnesium halide into contact with a silicon or tin halide, in solution in an inert organic solvent, until a granular solid precipitates off... | 10/03/2000 |
| 6107230 | Compositions that can produce polymers This invention provides compositions for polymerizing at least one monomer to produce a polymer. The compositions are produced by a process comprising contacting at least one organometal compound, at least one organoaluminum compound, and at least one tre... | 08/22/2000 |
| 6080697 | Process for making a composition that is useful for converting lower value aromatics to higher value aromatics A process to produce a composition is provided. Said process comprises: contacting a zeolite component, a silicon component, a Group 14 metal component, and a phosphorus component together to form a first mixture; treating said first mixture to form a sec... | 06/27/2000 |
| 6034202 | Polymerization catalysts for polyesters The invention provides non-antimony containing polymerization catalysts for the condensation of polyesters. The catalyst is in the form of a clear chlorine and/or bromine containing solution of a metal glycoxide and a metal glycolate having a pH in the ra... | 03/07/2000 |
| 5962361 | Methods of making and using catalyst precursor A method of making a solid, substantially dry olefin polymerization procatalyst precursor is disclosed whereby a solid precursor containing magnesium and titanium is formed in a slurry or solution, the solid then is separated from the solution and then dr... | 10/05/1999 |
| 5919723 | Supported metallocene catalyst for the (co) polymerization of alpha-olefins A supported catalyst for the (co)polymerization of alpha-olefins is obtained by putting the following products in contact with each other: (A) a metallocene derivative of a metal selected from the group consisting of transition metals and lanthanides, which is... | 07/06/1999 |
| 5914375 | Catalyst composition for preparing high-syndiotactivity polystyrene from styrene or other aryl ethylene monomers and processes using the same An catalyst composition for preparing high-syndiotacticity polystyrene polymers which comprises: (a) a titanium complex represented by the following formula of TiR'1 R'2 R'3 R'4 or TiR'1 R'2 | 06/22/1999 |
| 5851946 | Coordination catalyst systems comprising intramolecularly stabilized organometallic compounds The invention relates to the use of intramolecularly stabilized organometallic compounds as components in coordination catalyst systems, corresponding coordination catalyst systems and processes for the preparation of polymers by coordination polymerizati... | 12/22/1998 |
| 5834393 | Adduct of an organometal compound and a compatible anion, supported catalyst component supported catalyst processes for the preparation thereof A supported catalyst component comprising (a) a support material, an organometal compound, and (b) an activator compound comprising b.1) a cation which is capable of reacting with a transition metal metallocene compound to form a catalytically active tran... | 11/10/1998 |
| 5830959 | Process for the production of vinylaromatic polymers with a high degree of syndiotacticity Process for the preparation of crystalline vinylaromatic polymers with a high degree of syndiotacticity which comprises polymerizing vinylaromatic monomers in the presence of a catalytic system essentially consisting of: a) a complex of titanium selected from ... | 11/03/1998 |
| 5821189 | Catalyst for the homopolymerization or copolymerization of ethylene and process for its preparation A catalyst for the (co)polymerization of ethylene is obtained by a process comprising the contact of the following components (A), (B), (C) and (D) in the respective molar ratios (1):(0.5-2):(0-25):(0-15): (A): a bivalent arene of titanium having the formula T... | 10/13/1998 |
| 5786441 | Polymers, elastomeric compounds and products thereof, derived from novel amine compounds containing side-chain organolithium moieties A functionalized polymer comprising a polymeric segment, having at least one cyclic amine end group, defined according to formula (I) ##STR1## where Z is an anionically-polymerized polymer; R1 is selected from the group consisting of organ... | 07/28/1998 |
| 5744678 | Oligomerization catalysts and process using the same for the production of olefinic oligomers An oligomerization catalyst according to the invention comprises a nickel compound (A); an organophosphoric compound (B); an organoaluminum compound (C); and a compound of the group consisting of carbon-halogen bond-containing compounds, oxoacid and salts... | 04/28/1998 |
| 5728784 | Process for the preparation of crystalline vinylaromatic polymers with a predominantly syndiotactic structure Process for the preparation of crystalline vinylaromatic polymers with a predominantly syndiotactic structure which comprises polymerizing vinylaromatic monomers, alone or mixed with at least one other monomer, in the presence of a catalytic system essent... | 03/17/1998 |
| 5644009 | Catalyst composition for preparing high syndiotacticity polystyrene from styrene of other arylethylene monomers and processes using the same An catalyst composition for preparing high-syndiotacticity polystyrene polymers which comprises: (a) a titanium complex represented by the following formula of TiR'1 R'2 R'3 R'4 or TiR'1 R'2 | 07/01/1997 |
| 5627117 | Olefin polymerization catalyst and process for olefin polymerization Disclosed in an olefin polymerization catalyst comprising a transition metal compound having at least two transition metals in which at least one of said metals is bonded to a ligand having a cyclopentadienyl skeleton, at least one of said metals is selec... | 05/06/1997 |
| 5376612 | Chromium catalysts and process for making chromium catalysts Novel chromium-containing compounds, such as, for example, chromium pyrrolides, are prepared by forming a mixture of a chromium salt, a metal amide, and an electron pair donor solvent, such as, for example, an ether. These novel chromium-containing, or ch... | 12/27/1994 |
| 5374597 | Vanadium based olefin polymerization catalyst Catalysts useful in olefin polymerization are a mixture of (a) (i) one or more compounds Zn(X1)2 and one or more compounds Al(R1)3, or (ii) Zn(X1)2.2Al(R1)3, wherein X... | 12/20/1994 |
| 5348925 | Catalyst for the polymerization of olefins A solid component of catalyst, active in the polymerization of propylene and other -olefins in stereoregular polymers, is obtained: (i) by treating a non-activated silica support in particles with a tin tetrahalide, to at least partially block the hydro... | 09/20/1994 |
| 5326837 | Catalyst systems for syndiospecific polymerization of styrenes Syndiotactic polystyrene is produced in the presence of a catalyst comprising: (i) trimethylaluminum, (ii) at least one of the organotin compounds with general formulae: R1 R2 R3 Sn--O--SnR4 R5 R6 or... | 07/05/1994 |
| 5296432 | Catalyst for the (co) polymerization of ethylene Solid component of catalyst for the (co)polymerization of ethylene, including magnesium, halogen and titanium, obtained by: (i) dissolution, in an inert organic solvent, of a magnesium dialkyl, or a magnesium alkyl halide, a tin halide (IV) and possibly also a... | 03/22/1994 |
| 4738942 | Catalyst composition for polymerizing alpha-olefin polymers of relatively narrow molecular weight distribution and high melt index A catalyst composition for polymerizing alpha-olefins is prepared by treating a carrier with a mixture of at least one organomagnesium composition of the formula where R and R' are the same or different C1 -C12 hydrocarbyl groups, m ... | 04/19/1988 |
| 4686199 | Process for producing a catalyst component for polymerization of olefins A process for producing a catalyst component for polymerization of olefins which comprises contacting (a) a metal oxide with (b) a magnesium alkoxide, contacting the resulting contact product with (c) a halogen-containing compound, and finally contacting ... | 08/11/1987 |
| 4678768 | Catalyst component for polymerization of olefins A catalyst component for polymerization of olefins which is prepared by contacting a product obtained by contacting (A) a magnesium alkoxide, (B) a silicon compound having the hydrogen-silicon bond, and (C) a titanium compound with one another, with (D) (... | 07/07/1987 |
| 4618595 | Polymerization of olefins A catalyst, a process of forming the catalyst, and polymerizing at least one alpha-olefin with the catalyst, said catalyst produced by precipitating a composition from a solution of a metal halide, for example, magnesium dihalide, and a transition metal c... | 10/21/1986 |
| 4588703 | Polyolefin polymerization process and catalyst An olefin polymerization catalyst prepared by reacting a metal dihalide and a transition metal, then reacting that component with a precipitating agent, and then reacting the resulting solid with an activating component, wherein multiple activation steps ... | 05/13/1986 |
| 4562168 | Catalyst and olefin polymerization A polymerization catalyst providing a good balance of productivity and polymer fines prepared by reacting a metal halide, such as MgCl2, with a titanium compound, such as Ti(OEt)4, to form a first catalyst component; mixing a solutio... | 12/31/1985 |
| 4552858 | Catalyst component for polymerization of olefins A titanium halide containing catalyst component for polymerization of olefins which is prepared by reacting a magnesium hydrocarbyloxide with a silicon compound having at least one hydrogen-silicon bond, contacting the reaction product with an electron do... | 11/12/1985 |
| 4518706 | Hydrocarbon soluble catalyst supports and resultant polymerization catalysts A method is provided for preparing hydrocarbon soluble magnesium siloxide supports comprising contacting such supports with sufficient aluminum alkoxide or organic ethers to render the supports hydrocarbon soluble. Thereafter the supports are contacted wi... | 05/21/1985 |
