Chevron Research Company

Chevron Chemical Company LLC

Chevron Research & Technology Company

Victor P Kurkov

Leslie P Theard

David Rosendale

James Hongxue Wang

Ta Yen Ching

Lewis R Compton

Mitchell P Eichelberger

Tor H Palmgren

Shigeto Suzuki

Albert H Schroeder

Peter Denisevich, Jr

Richard S Threlkel

Gar L Woo

Robert G Wall

Seymour J Lapporte

James E Wang

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.

Low-haze ionomers of copolymers of alpha-olefins, carboxylic acid

Low-haze ionomers of copolymers of .alpha.-olefins, carboxylic acid

A continuous process for the aminolysis of polymers produced from ethylenically unsaturated structural units comprising contacting, in a reaction vessel,

Continuous process for the aminolysis of ethylene copolymers

Disclosed is a method for saponifying an ethylene-alkyl acrylate copolymer comprising mixing together an ethylene-alkyl acrylate copolymer and an aqueous solution of an inorganic alkali metal base at a temperature sufficient for saponification to take place and at which the ethylene-alkyl acrylate copolymer undergoes a phase change.

Ethylene-alkyl acrylate copolymer saponification process

A dimerization process for producing linear and/or mono-branched C.sub.10 to C.sub.28 olefins using dimerization catalysts and new C.sub.10 to C.sub.28 olefins mixtures are disclosed. The C.sub.10 to C.sub.28 olefin product is especially useful for the production of biodegradable alkylbenzene sulfonates detergents and intermediates therefor.

Detergent grade to C.sub.10 to C.sub.28 olefins, (C.sub.10 to C.sub.28

Tractable doped electroactive polymers, comprising recurring units of a 3,3'-N,N'-disubstituted-6,6'-bicarbazole-1,3,4-oxadiazole-2,5-diyl ring system, and a sufficient concentration of a charge-compensating ionic dopant associated therewith.

Bicarbazole-oxadiazole electroactive polymers

A one-step process for the preparation of poly[3,6-N-substituted carbazole-1,3,4-oxadiazole-2,5-diyl] which comprises polymerizing N-substituted carbazole-3,6-dicarboxylic acid, wherein the carbazole nitrogen is substituted with lower alkyl of 1 to 6 carbon atoms or phenyl, with a 0 to 30% molar excess of hydrazine or a hydrazine salt of a non-oxidizing acid in the presence of polyphosphoric acid.

Process for the preparation of poly[3,6-N-substituted

Tractable doped electroactive polymers, comprising recurring units of a 3,6-N-substituted carbazole-1,3,4-oxadiazole-2,5-diyl ring system, and a sufficient concentration of a charge-compensating ionic dopant associated therewith.

Carbazole-oxadiazole electroactive polymers

A tractable and reversible electroactive polymer which comprises a charged polymer backbone of recurring units of a fused 5,6,5-membered aromatic heterocyclic ring system wherein the 5-membered rings contain at least one nitrogen and a second heteroatom selected from the group consisting of O, S, Se, Te and substituted N, and a sufficient concentration of a charge-compensating ionic dopants associated therewith.

Growing community of inventors

San Rafael, CA, United States of America

Victor P Kurkov