Exxon Chemical Patents, Inc.

Exxon Research and Engineering Company

Exxonmobil Chemical Patents Inc.

Exxon Chemicals Patent, Inc.

Kenneth W Powers

Hsien-Chang Wang

Hsien C Wang

James V Fusco

Michael F McDonald, Jr

Thomas C Yu

Anthony Jay Dias

Narayanaswami R Dharmarajan

Robert Norman Webb

Robert C Puydak

Joseph A Olkusz

Ralph Howard Schatz

Ralph H Schatz

T-c Chung

Martin Leo Gorbaty

Donald R Hazelton

Robert Roper

Thomas Chen-Chi Yu

Chia S Chee

Debra C Handy

Jean M Frechet

Dongming Li

David Y Chung

Donald A White

Irving Kuntz

Andrew B Donnalley

Robert N Webb

Hans F Vanbrackle

The invention relates to a new catalyst system that improves the heat transfer capability of a butyl reactor slurry process system in the production of random copolymers of one or more isoolefin monomers and one or more conjugated diene monomers in continuous slurry polymerization processes. The process is carried out in an anhydrous polymerization system containing a mixture of the monomers in a polar diluent along with a Lewis acid and a Cor greater initiator having a tertiary halide.

Process for polymerizing cationically polymerizable monomers

The invention relates to a new improved catalyst to produce random copolymers of one or more iso-olefin monomers and one or more para-alkylstyrene monomers. The invention also relates to an improved continuous slurry polymerization process to produce random copolymers using the improved catalyst system. The process is carried out in an anhydrous polymerization system containing a mixture of the monomers in a polar solvent along with a Lewis acid and a stabilizing initiator.

Production of polyisobutylene copolymers

A solid nucleophilic reagent for the conversion of benzylic halogen functionality on polymers to other functionalities, and methods of making and using the same.

Solid nucleophilic reagent for conversion of benzylic halogen functionality on polymers to other functionalities

A thermoplastic composition which may be unvulcanized or vulcanized is provided which comprises a polymer blend of an elastomeric thermoplastic engineering resin and a halogen-containing copolymer of a C to C isomonoolefin and a para-alkylstyrene. A process for preparing a dynamically vulcanized composition is also provided.

Thermoplastic blend containing engineering resin

The invention relates to impact modifiers for polyamide compositions which improve the impact strength of the polyamides without adversely affecting the flexural modulus of the composition. The impact modifiers comprise blends of halogenated copolymers of a C,to C,isomonoolefin and an alkyl/styrene with a polyolefin.

Impact modification of polyamides

Solid nucleophilic reagent for conversion of benzylic halogen

A thermoplastic composition which may be unvulcanized or vulcanized is provided which comprises a polymer blend of an elastomeric thermoplastic engineering resin and a halogen-containing copolymer of a C.sub.4 to C.sub.7 isomonoolefin and a para-alkylstyrene. A process for preparing a dynamically vulcanized composition is also provided.

A process for producing a copolymer of isoolefin having between 4 and 7 carbon atoms and para-alkylstyrene is provided. The process comprises admixing the isoolefin and the para-alkylstyrene in a copolymerization reactor under copolymerization conditions in the presence of a diluent, and a Lewis Acid catalyst, and maintaining the copolymerization reactor substantially free of impurities which can complex with the catalyst or copolymerize with the isoolefin or the para-alkylstyrene.

Process for selective bromination of para-alkylstyrene/isoolefin

Vulcanizable blends containing a halogenated copolymer of a C.sub.4 -C.sub.7 isomonoolefin and para-alkylstyrene mixed with one or more olefinically unsaturated elastomeric polymers are disclosed. Cure is preferably effected using zinc stearate as a curative at levels below about 3.0 phr which gives rise to vulcanizates having selective interpolymer addition of benzylic halogen present in the halogenated copolymer to the double bond of the unsaturated polymer with no significant self curing of the halogenated polymer taking place.

Interpolymer cures of blends comprising halogenated

A process for the bromination of a copolymer of an isoolefin having from 4 to 7 carbon atoms and a para-alkystyrene comprising bromating the copolymer in the presence of bromine and a radical initiator thereby providing a brominated copolymer of the copolymer. The brominated copolymer is substantially free of ring bromine and backbone bromine.

Graft copolymers which are isoolefin/para-alkylstyrene copolymer represented by the formula ##STR1## in which R and R' can be hydrogen, alkyl, and the primary and secondary alkyl halides, 'a' ranges from about 14 to about 70,000, 'b' ranges from 0 to about 70,000, 'c' ranges from 0 to about 70,000, 'd' ranges from about 1 to about 70,000, X is a halogen, and Nu is a nucleophilic residue provided by a polymeric nucleophile.

Graft copolymers of para-alkylstyrene/isoolefin copolymers

A method of compatibilizing a blend of at least a hydrocarbon polymer with at least one other polymer which is incompatible with the hydrocarbon polymer, said method comprising adding to the polymer blend a compatibilizer which is an isoolefin/para-alkylstyrene copolymer represented by the formula ##STR1## in which R and R' can be hydrogen, alkyl, and the primary and secondary alkyl halides, 'a' ranges from about 14 to about 70,000, 'b' ranges from 0 to about 70,000, 'c' ranges from 0 to about 70,000, 'd' ranges from about 1 to about 70,000, X is a halogen, and Nu is a nucleophilic residue provided by a polymeric nucleophile.

Graft copolymers of para-alkylstyrene/isoolefin copolymers as blend

A non-vulcanized thermoplastic composition comprising a polyamide and an elastomeric halogen-containing copolymer of a C.sub.4 to C.sub.7 isomonoolefin and a para-alkylstyrene is prepared by blending the polyamide and elastomeric copolymer in the presence of specified metal compounds in an amount insufficient for vulcanizing the composition. Optionally, the resulting composition may be subjected to vulcanization.

Process for preparing thermoplastic compositions

A copolymer having a substantially homogeneous composition distribution, said copolymer comprising the direct reaction product of an isoolefin and para-alkylstrene.

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Berkeley Heights, NJ, United States of America

Kenneth W Powers