Hsien Chu Wang

US Patent:

6462131, Oct 8, 2002

Filed:

Oct 16, 2000

Appl. No.:

09/688425

Inventors:

Mun Fu Tse - Seabrook TX
Hsien Chang Wang - Bellaire TX
Ramanan Krishnamoorti - Houston TX
Andy H. Tsou - Houston TX

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

C08L 5300

US Classification:

525 70, 525 87, 525 88, 525 95, 525 98, 525 99

Abstract:

Compatibilized blends of an isobutylene polymer and an unsaturated diene polymer are prepared by utilizing a compatibilizing agent comprising a block/graft copolymer containing polyisobutylene segments and C to C alkyl-substituted styrene polymer segments, such as poly(t-butylstyrene) segments.

US Patent:

6552108, Apr 22, 2003

Filed:

Oct 11, 2000

Appl. No.:

09/686215

Inventors:

Hsien Chang Wang - Bellaire TX
Ilan Duvdevani - Houston TX
Connie R. Qian - Houston TX
Pawan Kumar Agarwal - Houston TX

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

C08K 529

US Classification:

524251, 524515, 524528, 524236

Abstract:

The present invention relates generally to rubber compositions having improved green strength and thermal stability. These compositions comprise blends of a first rubber component, an isoolefin/para-alkylstyrene copolymer component, and an amine component reacted in situ prior to curing. The present invention further relates to methods for preparing these compositions.

US Patent:

6624220, Sep 23, 2003

Filed:

Jun 13, 2000

Appl. No.:

09/592757

Inventors:

Walter H Waddell - Pasadena TX
Robert R. Poulter - League City TX
Kenneth O. McElrath - Houston TX
John E. Rogers - Houston TX
Wai K. Wong - Wezembeek-Oppem, BE
Hsien C. Wang - Bellaire TX
Timothy A. Mills - Rixensart, BE

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

C08K 524

US Classification:

524265, 524515, 524528

Abstract:

Transparent and colorable elastomeric compositions are provided. The transparent elastomeric compositions can be covulcanized with rubbers such as polybutadiene, polyisoprene, styrene-butadiene rubber, styrene-isoprene-butadiene rubber, isoprene-butadiene rubber, ethylene-propylene diene rubber or natural rubber. The colorable rubber compositions have sufficient properties to function as a reinforcing member in an automobile tire. Preferably, both the transparent and colorable elastomeric compositions include at least one copolymer of a C to C isoolefin and a para-alkylstyrene, silica and a coupling agent.

US Patent:

7119146, Oct 10, 2006

Filed:

Aug 19, 2002

Appl. No.:

10/223577

Inventors:

Mun Fu Tse - Seabrook TX, US
Hsien Chang Wang - Bellaire TX, US
Ramanan Krishnamoorti - Bellaire TX, US
Andy H. Tsou - Houston TX, US

Assignee:

ExxonMobil Chemical Patents Inc. - Houston TX

International Classification:

C08L 53/02

US Classification:

525 70, 525 87, 525 88, 525 95, 525 98, 525 99

Abstract:

Compatibilized blends of an isoolefin polymer and an unsaturated diene polymer are prepared by utilizing a compatibilizing agent comprising a block/graft copolymer containing poly- or copoly-isoolefin segments and Cto Calkyl-substituted styrene polymer segments, such as poly(t-butylstyrene) segments.

US Patent:

53569504, Oct 18, 1994

Filed:

Apr 26, 1993

Appl. No.:

8/053969

Inventors:

Donald A. White - Keasbey NJ
Hsien C. Wang - Edison NJ

Assignee:

Exxon Chemical Patents Inc. - Linden NJ

International Classification:

C08F25702
C08F25900
C08F25508

US Classification:

522116

Abstract:

A grafted polymer of an isomonoolefin and an alkylstyrene, such as a maleic anhydride-grafted copolymer of isobutylene and para-methylstyrene, is provided. Processes for preparing the grafted polymer are also provided.

US Patent:

63036916, Oct 16, 2001

Filed:

Jun 7, 1993

Appl. No.:

8/072807

Inventors:

Thomas Chen-chi Yu - Bellaire TX
Kenneth William Powers - Berkeley Heights NJ
Hsien Chang Wang - Edison NJ

Assignee:

Exxon Mobil Chemical Patents Inc. - Houston TX

International Classification:

C08L 2316
C08L 2318

US Classification:

525178

Abstract:

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. sub. 4 to C. sub. 7 isomonoolefin and an alkyl/styrene with a polyolefin.

US Patent:

55677754, Oct 22, 1996

Filed:

Jun 6, 1995

Appl. No.:

8/469285

Inventors:

Hsien C. Wang - Bellaire TX
Irwin J. Gardner - Scotch Plains NJ
James V. Fusco - Red Bank NJ

Assignee:

Exxon Chemical Patents Inc. - Wilmington DE

International Classification:

C08F25510
C08F25702

US Classification:

525279

Abstract:

This invention provides for curable and graft-cured polymer compositions prepared from a mixture comprising: a) an elastomeric copolymer containing from about 0. 01 up to about 10 mole % of Y ester groups randomly distributed along and pendant to the elastomeric polymer chain, said Y ester groups having the structure: ##STR1## wherein R. sub. 2 and R. sub. 3 are independently selected from the group consisting of hydrogen and an alkyl group containing 1 to about 6 carbon atoms and R. sub. 4 is selected from the group consisting of hydrogen, an alkyl group containing from 1 to about 28 carbon atoms, an aryl group and an alkenyl group containing from 2 to about 28 carbon atoms; and b) at least one free radically polymerizable monomer. The invention also provides for a process for preparing graft-cured polymer compositions comprising forming the above recited mixture of (a) and (b) and subjecting said mixture to free radical polymerization conditions. The Y ester groups pendant to the elastomeric polymer chain, e. g.

US Patent:

50137930, May 7, 1991

Filed:

Jul 26, 1990

Appl. No.:

7/558698

Inventors:

Hsien C. Wang - Edison NJ
Kenneth W. Powers - Berkeley Heights NJ
Robert C. Puydak - Cranbury NJ
Narayanaswami R. Dharmarajan - Highland Park NJ

Assignee:

Exxon Chemical Patents Inc. - Linden NJ

International Classification:

C08L 2326
C08L 2508
C08L 2318
C08L 2310

US Classification:

525195

Abstract:

A dynamically vulcanized thermoplastic composition is provided which comprises a polymer blend of a thermoplastic olefinic resin, and an elastomeric halogen-containing copolymer of a C. sub. 4 to C. sub. 7 isomonoolefin and a paraalkylstyrene. A process for preparing the dynamically vulcanized composition is also provided.