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| Number | Title | Issue Date |
| 5504164 | Curing systems for compositions containing halogenated copolymers of isobutylene and para-methylstrene The present invention provides for sulfur curable compositions containing a halogenated copolymer of a C4 to C7 isomonoolefin, e.g., isobutylene and a para-alkylstyrene, e.g., para-methylstyrene, and further containing a polyunsatura... | 04/02/1996 |
| 5112674 | Cling packaging film for wrapping food products The present invention is directed to a cling packaging film for use in wrapping food products, particularly fresh meat and produce. The film comprises a core layer containing a copolymer of ethylene and an ethylenically unsaturated polar comonomer togethe... | 05/12/1992 |
| 5095046 | Hot melt adhesive of ethylene/unsaturated acid copolymer and epoxy crosslinker A heat curable hot melt adhesive system is disclosed. The system uses an epoxy-crosslinking ethylene polymer component, a tackifier compatible therewith and an epoxy crosslinking agent having an epoxide functionality of at least 2. The ethylene polymer co... | 03/10/1992 |
| 5093466 | Polyoxamide oxygen barrier Oxygen barrier structures such as packages, laminated films, etc. are disclosed. The oxygen barrier has at least one layer comprising a polymer having oxamide units of the formula: ##STR1## and may further include amide units selected from the formul... | 03/03/1992 |
| 5037908 | Process for polymerization of butene-1 An improved process for polymerizing butene-1 in the presence of a polymerization catalyst composed of (a) a catalyst component containing titanium and halogen as essential constituents and (b) an organometallic compound, wherein the improvement comprises... | 08/06/1991 |
| 5032652 | Supported vanadium catalyst for polymerization olefins and a process of preparing and use the same This invention relates to a supported vanadium-alumoxane catalyst for use in gas and liquid polymerization of olefins. The invention particularly relates to the use of silica gel containing from about 6 to about 20 percent by weight adsorbed water as the ... | 07/16/1991 |
| 5026798 | Process for producing crystalline poly--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 -olefins to produce high crystallinity and high molecular weight poly--olefins.... | 06/25/1991 |
| 5023316 | Catalytic polymerization of ଲ-substituted-ଲ-propiolactones by oligomeric isobutylaluminoxane A method of polymerizing at least one ଲ-substituted-ଲ-propiolactone in the presence of a catalytic amount of isobutylaluminoxane in a solvent for the ଲ-propiolactone(s) and isobutylaluminoxane for a time and at a temperature to produce a... | 06/11/1991 |
| 5017665 | Supported catalyst for 1-olefin and 1,4-diolefin copolymerization A process using a high activity supported metallocene-alumoxane catalyst, comprising methylalumoxane and bisindenyl zirconium dichloride on a silica support, for the copolymerization of ethylene and 1,4-hexadiene to produce a copolymer having a high conce... | 05/21/1991 |
| 5017714 | Silicon-bridged transition metal compounds Silicon-bridged transition metal compounds and their use as -olefin polymerization catalysts are disclosed. A chiral silicon-bridged metallocene catalyst polymerizes -olefins to high isotacity with a minimum of inversions at high rates of ca... | 05/21/1991 |
| 5015714 | Heptadiene polymer and process for producing the same A heptadiene polymer comprising the repeating units ##STR1## and having a number-average molecular weight of 2,000-500,000.... | 05/14/1991 |
| 5013784 | Internal resin-tackified acrylic polymers containing crosslinkable comonomers Acrylic copolymer compositions which contain a tackifying hydrocarbon resin and a polyfunctional crosslinking monomer and the use of such composition in pressure-sensitive adhesives are described. The tackifying hydrocarbon resin is dissolved, as is the p... | 05/07/1991 |
| 5008228 | Method for preparing a silica gel supported metallocene-alumoxane catalyst This invention relates to a process for preparing a supported metallocene alumoxane catalyst for use in the slurry or liquid phase polymerization of olefins. The invention particularly relates to the use of silica gel containing from about 10 to about 50 ... | 04/16/1991 |
| 5008204 | Method for determining the compositional distribution of a crystalline copolymer A method for fractionating crystalline copolymers to determine solubility distribution as a function of temperature. Fractionation is conducted by passing a solvent through a column containing the crystallized copolymer at an increasing temperature from 6... | 04/16/1991 |
| 5006500 | Olefin polymerization catalyst from trialkylaluminum mixture, silica gel and a metallocene A high activity alumoxane-metallocene supported catalyst for the polymerization of 1-olefins prepared by reacting undehydrated silica gel with a mixture of trimethylaluminum and triisobutylaluminum to produce a silica-alumoxane product which is then react... | 04/09/1991 |
| 5002916 | Silica supported vanadium carboxylate catalysts Supported catalysts component for producing ethylene-propylene elastomers comprising a compound represented by the formula: (1) [V3 O(RCO2) (ED)3 ]2. V2 O2 X6, or (2) V3 O(RCO | 03/26/1991 |
| 5001205 | Process for production of a high molecular weight ethylene -olefin elastomer with a metallocene alumoxane catalyst Disclosed is a process for preparing high molecular weight ethylene--olefin elastomers, preferably an ethylene-propylene elastomer, by liquid phase polymerization of the requisite monomers in the presence of a metallocene/alumoxane catalyst system.... | 03/19/1991 |
| 5001244 | Metallocene, hydrocarbylaluminum and hydrocarbylboroxine olefin polymerization catalyst Olefin polymerization catalysts, and methods for their preparation, comprising a metallocene and the reaction product of a hydrocarbylaluminum with a trihydrocarbylboroxine. The catalyst may be homogeneous or supported.... | 03/19/1991 |
| 5001197 | Polypropylene composition and method for functionalization of polypropylene The present invention relates to a process for the functionalization, and preferably the maleation of a polyolefin, preferably polypropylene, by use of a selected class of peroxides which will not cause the molecular weight of the polyolefin to significan... | 03/19/1991 |
| 4952631 | Compositions for preparing cement-adhesive reinforcing fibers A modifier composition is disclosed for compounding with a polyolefin to produce a resin from which cement adherent polyolefin fibers may be produced by conventional fiber forming methods. The modifier composition comprising a polyolefin resin modified to... | 08/28/1990 |
| 4952714 | Non-aqueous process for the preparation of alumoxanes A process for the preparation of hydrocarbylalumoxanes comprising oligomeric, linear and/or cyclic hydrocarbylalumoxanes which comprise contacting a hydrocarbylaluminum dissolved in an inert dry organic liquid with a trihydrocarbylboroxine. Preferably, th... | 08/28/1990 |
| 4942148 | Catalyst component for olefin polymerization A catalyst component for olefin polymerization, prepared by bringing a titanium-containing solid which comprises (a) a metal oxide, (b) an organomagnesium compound represented by the following general formula: R1 MgR2 wherein R1 | 07/17/1990 |
| 4937217 | Method for utilizing triethylaluminum to prepare an alumoxane support for an active metallocene catalyst This invention relates to a process for preparing a supported metallocene alumoxane catalyst for use in the polymerization of olefins. The invention particularly relates to the use of silica gel containing from about 6 to about 20 percent by weight adsorb... | 06/26/1990 |
| 4937299 | Process and catalyst for producing reactor blend polyolefins Polyolefin reactor blends obtained by polymerization of ethylene and higher alpha-olefins in the presence of a catalyst system comprising two or more metallocenes and alumoxane.... | 06/26/1990 |
| 4937301 | Method for preparing a supported metallocene-alumoxane catalyst for gas phase polymerization This invention relates to a process for preparing a supported metallocene alumoxane catalyst for use in the gas phase polymerization of olefins. The invention particularly relates to the use of silica gel containing from about 6 to about 10 percent by wei... | 06/26/1990 |
| 4935474 | Process and catalyst for producing polyethylene having a broad molecular weight distribution Polyolefins having a broad molecular weight distribution are obtained by polymerizing ethylene or higher alpha-olefins in the presence of a catalyst system comprising two or more metallocenes each having different propagation and termination rate constant... | 06/19/1990 |
| 4935397 | Supported metallocene-alumoxane catalyst for high pressure polymerization of olefins and a method of preparing and using the same This invention relates to a process for preparing a supported metallocene alumoxane catalyst for use in the high pressure polymerization of olefins. The invention particularly relates to the use of silica gel having a particle size less than 10 microns co... | 06/19/1990 |
| 4926002 | Catalyst for olefin polymerization A catalyst for olefin polymerization which comprises: (A) a catalyst component obtained by reacting (a) pentadiene or a derivative thereof with (b) an alkali metal and subsequently reacting the reaction product with (c) a titanium compound or zirconium co... | 05/15/1990 |
| 4925821 | Method for utilizing triethyaluminum to prepare an alumoxane support for an active metallocene catalyst This invention relates to a process for preparing a supported metallocene alumoxane catalyst for use in the polymerization of olefins. The invention particularly relates to the use of silica gel containing from about 6 to about 20 percent by weight adsorb... | 05/15/1990 |
| 4914253 | Method for preparing polyethylene wax by gas phase polymerization This invention relates to a process for preparing polyethylene wax having a narrow molecular weight distribution in a gas phase polymerization reactor. The invention particularly relates to the process of polymerizing ethylene in the presence of a support... | 04/03/1990 |
| 4912075 | Method for preparing a supported metallocene-alumoxane catalyst for gas phase polymerization This invention relates to a process for preparing a supported metallocene alumoxane catalyst for use in the gas phase polymerization of olefins. The invention particularly relates to the use of silica gel containing from about 6 to about 10 percent by wei... | 03/27/1990 |
| 4904631 | Supported vanadium catalyst for polymerization of olefins and a process of preparing and using the same This invention relates to a supported vanadium-alumoxane catalyst for use in gas and liquid polymerization of olefins. The invention particularly relates to the use of silica gel containing from about 6 to about 20 percent by weight adsorbed water as the ... | 02/27/1990 |
| 4897455 | Polymerization process An olefin polymerization supported catalyst comprising a support and the reaction product of a metallocene of Group 4b, 5b or 6b of the Periodic Table and an alumoxane, said reaction product formed in the presence of a support.... | 01/30/1990 |
| 4871704 | Catalyst for olefin polymerization A catalyst for olefin polymerization which comprises: (A) a catalyst component obtained by reacting (a) pentadiene or a derivative thereof with (b) an alkali metal and susequently reacting the reaction product with (c) a titanium compound or zirconium com... | 10/03/1989 |
| 4871705 | Process for production of a high molecular weight ethylene a-olefin elastomer with a metallocene alumoxane catalyst Disclosed is a process for preparing high molecular weight ethylene--olefin elastomers, preferably an ethylene-propylene elastomer, by liquid phase polymerization of the requisite monomers in the presence of a metallocene/alumoxane catalyst system.... | 10/03/1989 |
| 4870042 | Catalyst for olefin polymerization A catalyst for olefin polymerization which comprises: (A) a catalyst component obtained by reacting (a) alkali metal boron hydride represented by the formula MBH4 (where M denotes an alkali metal) with (b) pyrazole and subsequently reacting the reac... | 09/26/1989 |
| 4861812 | Compositions for preparing cement-adhesive reinforcing fibers A modified composition is disclosed for compounding with a polyolefin to produce a resin from which cement adherent polyolefin fibers may be produced by conventional fiber forming methods. The modifier composition comprising a polyolefin resin modified to... | 08/29/1989 |
| 4857230 | Stabilizing composition for polyolefins A polyolefin composition incorporating in 100 parts by weight of a polyolefin, (A) 0.05 to 1 part by weight of a hindered amine type compound, (B) 0.02 to 1 part by weight of an organic phosphorus type compound, and (C) 0.02 to 0.5 part by weight of hydro... | 08/15/1989 |
| 4839422 | Ternary adhesive compositions An adhesive composition which contains a thermoplastic elastomer which includes ethylene propylene rubber, ethylene propylene diene monomer, polyisobutylene butyl rubber, ethylene vinyl acetate graft copolymers thereof with C3 to C10... | 06/13/1989 |
| 4824499 | Method for production of gas-pervious composite film Disclosed is a method for the production of a gas-pervious composite film comprising the steps of unaxially or biaxially drawing a film composed of a crystalline polyolefin resin, a rubbery polymer, and a filler thereby forming a drawn film, joining said ... | 04/25/1989 |
