Abstract: Disclosed is a catalyst system for the homopolymerization and copolymerization of alpha-olefins having 2-8 carbon atoms, said catalyst system comprising a cyclopentadienyl Group 6b metal hydrocarbyl compound in which the metal has an oxidation state of +3, said Group 6b metal compound being supported on an inorganic support. The catalyst system my also contain a Group 2 or Group 3 metal alkyl compound.
Abstract: A composition is disclosed which comprises a copolymer of ethylene and alkyl acrylate having improved melt-point temperature and/or improved adhesiveness to polymeric substrates. A process for making these compositions is also disclosed. In addition, an ionomer made from the copolymer and a method for making the ionomer are disclosed.
Type:
Grant
Filed:
June 5, 1995
Date of Patent:
August 5, 1997
Assignee:
Chevron Chemical Company
Inventors:
Jerry G. Latiolais, J. Paul Gathright, Nicholas R. Galante, M. Stephen Galland, J. Diores Gallet, Lewis R. Compton, George L. Baker, James H. Wang
Abstract: The invention provides a composition of matter having oxygen scavenger capabilities. The composition comprises a blend of a first polymeric component comprising a polyolefin, the first polymeric component having been grafted with an unsaturated carboxylic anhydride or an unsaturated carboxylic acid, or combinations thereof, or with an epoxide; a second polymeric component having OH, SH or NHR.sup.2 groups where R.sup.2 is H, C.sub.1 -C.sub.3 alkyl, substituted C.sub.1 -C.sub.3 alkyl; and a metal salt capable of catalyzing the reaction between oxygen and the second polymeric component, the polyolefin being present in an amount sufficient so that the blend is non phase-separated. In the preferred composition maleic anhydride is the grafted material, the second polymeric component is MXD6 nylon and the metal is cobalt. A method of providing a homogeneous blend of a polyolefin with a second polymeric component having OH, SH or NHR.sup.2 groups is also set forth.
Type:
Grant
Filed:
March 28, 1994
Date of Patent:
June 24, 1997
Assignee:
Chevron Chemical Company
Inventors:
Robert Bacskai, Ta Yen Ching, Kiyoshi Katsumoto
Abstract: Ionomer compositions which have improved optical properties are disclosed. These compositions comprise ionomers which can be represented as the polymerization product of alpha-olefins having from two to eight carbon atoms, esters of alpha, beta-ethylenically-unsaturated carboxylic acids, metal salts of acrylic and methacrylic acid, and optional alpha, beta-ethylenically-unsaturated comonomers which impart some desired polymer property or properties, such as acidity and/or solvent resistivity. Also disclosed are methods of making these ionomer compositions in a reactive extruder and treating the compositions with acid to impart acidity to the compositions or to only the surface of the compositions.
Type:
Grant
Filed:
January 27, 1995
Date of Patent:
May 20, 1997
Assignee:
Chevron Chemical Company
Inventors:
James H. Wang, David Rosendale, Victor P. Kurkov, Leslie P. Theard, Ta Y. Ching, Lewis R. Compton, Tor H. G. Palmgren, Mitchell P. Eichelberger
Abstract: Ionomer compositions which have improved optical properties are disclosed. These compositions comprise ionomers which can be represented as the polymerization product of alpha-olefins having from two to eight carbon atoms, esters of alpha, beta-ethylenically-unsaturated carboxylic acids, metal salts of acrylic and methacrylic acid, and optional alpha, beta-ethylenically-unsaturated comonomers which impart some desired polymer property or properties, such as acidity and/or solvent resistivity. Also disclosed are methods of making these ionomer compositions in a reactive extruder and treating the compositions with acid to impart acidity to the compositions or to only the surface of the compositions.
Type:
Grant
Filed:
June 5, 1995
Date of Patent:
February 4, 1997
Assignee:
Chevron Chemical Company
Inventors:
James H. Wang, David Rosendale, Victor P. Kurkov, Leslie P. Theard, Ta Y. Ching, Lewis R. Compton, Tor H. G. Palmgren, Mitchell P. Eichelberger
Abstract: Ionomer compositions which have improved optical properties are disclosed. These compositions comprise ionomers which can be represented as the polymerization product of alpha-olefins having from two to eight carbon atoms, esters of alpha, beta-ethylenically-unsaturated carboxylic acids, metal salts of acrylic and methacrylic acid, and optional alpha, beta-ethylenically-unsaturated comonomers which impart some desired polymer property or properties, such as acidity and/or solvent resistivity. Also disclosed are methods of making these ionomer compositions in a reactive extruder and treating the compositions with acid to impart acidity to the compositions or to only the surface of the compositions.
Type:
Grant
Filed:
June 5, 1995
Date of Patent:
January 28, 1997
Assignee:
Chevron Chemical Company
Inventors:
James H. Wang, David Rosendale, Victor P. Kurkov, Leslie P. Theard, Ta Y. Ching, Lewis R. Compton, Tor H. G. Palmgren, Mitchell P. Eichelberger
Abstract: The present invention relates to synthetic hydrocarbon as the continuous phase of a drilling fluid. These hydrocarbons comprise mostly linear olefins, preferably C.sub.14 to C.sub.18 olefins.
Type:
Grant
Filed:
June 7, 1995
Date of Patent:
December 31, 1996
Assignee:
Chevron Chemical Company
Inventors:
Jeffrey C. Gee, Christophe J. Lawrie, Roger C. Williamson
Abstract: Ionomer compositions which have improved optical properties are disclosed. These compositions comprise ionomers which can be represented as the polymerization product of alpha-olefins having from two to eight carbon atoms, esters of alpha, beta-ethylenically-unsaturated carboxylic acids, metal salts of acrylic and methacrylic acid, and optional alpha, beta-ethylenically-unsaturated comonomers which impart some desired polymer property or properties, such as acidity and/or solvent resistivity. Also disclosed are methods of making these ionomer compositions in a reactive extruder and treating the compositions with acid to impart acidity to the compositions or to only the surface of the compositions.
Type:
Grant
Filed:
October 27, 1994
Date of Patent:
November 19, 1996
Assignee:
Chevron Chemical Company
Inventors:
James H. Wang, David Rosendale, Victor P. Kurkov, Leslie P. Theard, Ta Y. Ching, Lewis R. Compton, Tor H. G. Palmgren, Mitchell P. Eichelberger
Abstract: A composition is disclosed which comprises a copolymer of ethylene and alkyl acrylate having improved melt-point temperature and/or improved adhesiveness to polymeric substrates. A process for making these compositions is also disclosed. In addition, an ionomer made from the copolymer and a method for making the ionomer are disclosed.
Type:
Grant
Filed:
April 26, 1994
Date of Patent:
November 5, 1996
Assignee:
Chevron Chemical Company
Inventors:
Jerry G. Latiolais, J. Paul Gathright, Nicholas R. Galante, M. Stephen Galland, J. Diores Gallet, Lewis R. Compton, George L. Baker, James H. Wang
Abstract: Ionomer compositions which have improved optical properties are disclosed. These compositions comprise ionomers which can be represented as the polymerization product of alpha-olefins having from two to eight carbon atoms, esters of alpha, beta-ethylenically-unsaturated carboxylic acids, metal salts of acrylic and methacrylic acid, and optional alpha, beta-ethylenically-unsaturated comonomers which impart some desired polymer property or properties, such as acidity and/or solvent resistivity. Also disclosed are methods of making these ionomer compositions in a reactive extruder and treating the compositions with acid to impart acidity to the compositions or to only the surface of the compositions.
Type:
Grant
Filed:
June 5, 1995
Date of Patent:
October 29, 1996
Assignee:
Chevron Chemical Company
Inventors:
James E. Wang, David Rosendale, Victor P. Kurkov, Leslie P. Theard, Ta Y. Ching, Lewis R. Compton, Tor H. G. Palmgren, Mitchell P. Eichelberger
Abstract: Ionomer compositions which have improved optical properties are disclosed. These compositions comprise ionomers which can be represented as the polymerization product of alpha-olefins having from two to eight carbon atoms, esters of alpha, beta-ethylenically-unsaturated carboxylic acids, metal salts of acrylic and methacrylic acid, and optional alpha, beta-ethylenically-unsaturated comonomers which impart some desired polymer property or properties, such as acidity and/or solvent resistivity. Also disclosed are methods of making these ionomer compositions in a reactive extruder and treating the compositions with acid to impart acidity to the compositions or to only the surface of the compositions.
Type:
Grant
Filed:
June 5, 1995
Date of Patent:
October 29, 1996
Assignee:
Chevron Chemical Company
Inventors:
James H. Wang, David Rosendale, Victor P. Kurkov, Leslie P. Theard, Ta Y. Ching, Lewis R. Compton, Tor H. G. Palmgren, Mitchell P. Eichelberger
Abstract: Ionomer compositions which have improved optical properties are disclosed. These compositions comprise ionomers which can be represented as the polymerization product of alpha-olefins having from two to eight carbon atoms, esters of alpha, beta-ethylenically-unsaturated carboxylic acids, metal salts of acrylic and methacrylic acid, and optional alpha, beta-ethylenically-unsaturated comonomers which impart some desired polymer property or properties, such as acidity and/or solvent resistivity. Also disclosed are methods of making these ionomer compositions in a reactive extruder and treating the compositions with acid to impart acidity to the compositions or to only the surface of the compositions.
Type:
Grant
Filed:
June 5, 1995
Date of Patent:
September 10, 1996
Assignee:
Chevron Chemical Company
Inventors:
James H. Wang, David Rosendale, Victor P. Kurkov, Leslie P. Theard, Ta Yen Ching, Lewis R. Compton, Tor H. G. Palmgren, Mitchell P. Eichelberger
Abstract: Disclosed are copolymers of ethylene and alkyl acrylate monomers and methods of making those copolymers. Said copolymers exhibit increased melt-point temperatures and decreased hardness over similar conventional copolymers.
Type:
Grant
Filed:
September 21, 1992
Date of Patent:
August 6, 1996
Assignee:
Chevron Chemical Company
Inventors:
Jerry G. Latiolais, Nicholas R. Galante, J. Paul Gathright, James H. Wang
Abstract: A composition is disclosed which comprises a copolymer of ethylene and alkyl acrylate having improved melt-point temperature and/or improved adhesiveness to polymeric substrates. A process for making these compositions is also disclosed. In addition, an ionomer made from the copolymer and a method for making the ionomer are disclosed.
Type:
Grant
Filed:
June 5, 1995
Date of Patent:
August 6, 1996
Assignee:
Chevron Chemical Company
Inventors:
Jerry G. Latiolais, J. Paul Gathright, Nicholas R. Galante, M. Stephen Galland, J. Diores Gallet, Lewis R. Compton, George L. Baker, James H. Wang
Abstract: A composition is disclosed which comprises a copolymer of ethylene and alkyl acrylate having improved melt-point temperature and/or improved adhesiveness to polymeric substrates. A process for making these compositions is also disclosed. In addition, an ionomer made from the copolymer and a method for making the ionomer are disclosed.
Type:
Grant
Filed:
June 5, 1995
Date of Patent:
July 2, 1996
Assignee:
Chevron Chemical Company
Inventors:
Jerry G. Latiolais, J. Paul Gathright, Nicholas R. Galante, M. Stephen Galland, J. Diores Gallet, Lewis R. Compton, George L. Baker, James H. Wang
Abstract: A catalyst useful in the disproportionation of alkanes is provided comprising an acid component having the formula HB(OSO.sub.2 CF.sub.3).sub.4 and a support. A method for the disproportionation of C.sub.4 -C.sub.16 alkanes employing the catalyst is also provided.
Abstract: A polymerization catalyst system is formed by producing a solution of a halide of scandium, yttrium, or a rare earth metal and an alcohol; contacting the solution with a halide ion exchanging source to form a solid. The catalyst thus produced can be combined with an organometallic cocatalyst. Polymers with multimodal molecular weight distribution are produced when a diol is used to prepare the catalyst and an organoaluminum halide is used as cocatalyst. Polymers with broad molecular weight distribution of the unimodal type are produced when using a trialkylaluminum compound or an alkyl aluminum hydride.