David Cy Chung

US Patent:

52445909, Sep 14, 1993

Filed:

Jul 11, 1991

Appl. No.:

7/728489

Inventors:

David Y. Chung - Edison NJ
Mark J. Struglinski - Bridgewater NJ

Assignee:

Exxon Chemical Patents Inc. - Linden NJ

International Classification:

C10M14302
C08F 800
C08F 2006
C08F 600

US Classification:

252 43

Abstract:

Degraded molecular weight copolymers of ethylene alpha-olefin are provided. The ethylene alpha-olefin copolymers, before degradation, are characterized by having a narrow molecular weight distribution and are comprised of intramolecularly heterogeneous and intermolecularly homogeneous copolymer chains. The degraded copolymers are useful as viscosity index improvers for oils.

US Patent:

56519273, Jul 29, 1997

Filed:

Jun 5, 1996

Appl. No.:

8/659697

Inventors:

Richard Stephen Auda - Westfield NJ
William Myers Davis - Westfield NJ
David Yen-Lung Chung - Edison NJ
Lawrence William Flatley - Somerville NJ
Brenton George Jones - Overijse, BE
Donald Andrew White - Edison NJ
Hans Gerlach Woudboer - Bonn-Bad Goedsberg, DE

Assignee:

Exxon Chemical Patents Inc. - Wilmington DE

International Classification:

B29C 4778
C08F 400

US Classification:

264 85

Abstract:

Multiple sequential chemical reactions on a polymeric feedstock are carried out in an extruder with multiple reaction zones. Each reaction zone has means for introduction of reagents, for mixing of reagents with polymer and for removal of by/co-products or unreacted reagents.

US Patent:

52522385, Oct 12, 1993

Filed:

Jun 27, 1991

Appl. No.:

7/722624

Inventors:

David Y. Chung - Edison NJ
Antonio Gutierrez - Mercerville NJ
John E. Johnston - Westfield NJ
Mark J. Struglinski - Bridgewater NJ
Robert D. Lundberg - Bridgewater NJ

Assignee:

Exxon Chemical Patents Inc. - Linden NJ

International Classification:

C10M14906

US Classification:

252 515A

Abstract:

The present invention is directed to a viscosity index improver for lubricating oil compositions comprising the reaction product of A) a copolymer of ethylene and at least one other alpha-olefin monomer, said copolymer grafted with ethylenically monounsaturated carboxylic acid material and B) amido-amine or thioamido-amine comprising the reaction product of a polyamine and alpha, beta-unsaturated compound of the formula ##STR1## wherein X is oxygen or sulfur, Y is OR. sup. 4, --SR. sup. 4 or ##STR2## and R. sup. 1, R. sup. 2, R. sup. 3, R. sup. 4 and R. sup. 5 are independently selected from hydrogen, hydrocarbyl and substituted hydrocarbyl.

US Patent:

52904610, Mar 1, 1994

Filed:

Mar 10, 1992

Appl. No.:

7/848817

Inventors:

David Y. Chung - Edison NJ
Antonio Gutierrez - Mercerville NJ
Mark J. Struglinski - Bridgewater NJ

Assignee:

Exxon Chemical Patents Inc. - Linden NJ

International Classification:

C10M14906

US Classification:

252 515A

Abstract:

Composition of matter useful as multifunctional viscosity index improver for lubricating oil comprising reaction product of: (i) (a) degraded ethylene-alpha-olefin copolymer obtained by degrading copolymer of ethylene and at least one other alpha-olefin monomer, said copolymer comprising intramolecularly heterogeneous copolymer chains containing at least one crystallizable segment of methylene units and at least one low crystallinity ethylene-alpha-olefin copolymer segment, wherein said at least one crystallizable segment comprises at least about 10 weight percent of said copolymer chain and contains at least about 57 weight percent ethylene, wherein said low crystallinity segment contains not greater than about 53 weight percent ethylene, and wherein said copolymer has a molecular weight distribution characterized by at least one of a ratio of M. sub. w /M. sub. n of less than 2 and a ratio of M. sub. z /M. sub. w of less than 1.

US Patent:

50680471, Nov 26, 1991

Filed:

Oct 12, 1989

Appl. No.:

7/420791

Inventors:

David Y. Chung - Edison NJ
Mark J. Struglinski - Bridgewater NJ

Assignee:

Exxon Chemical Patents, Inc. - Linden NJ

International Classification:

C10M14918
C10M14522

US Classification:

2520515A

Abstract:

Degraded molecular weight copolymers of ethylene alpha-olefin are provided. The ethylene alpha-olefin copolymers, before degradation, are characterized by having a narrow molecular weight distribution and are comprised of intramolecularly heterogeneous and intermolecularly homogeneous copolymer chains. The degraded copolymers are useful as viscosity index improvers for oils.

US Patent:

54277027, Jun 27, 1995

Filed:

Dec 11, 1992

Appl. No.:

7/989418

Inventors:

David Y. Chung - Edison NJ
Paul Brice - Abingdon, GB2
Steven J. Searis - Wantage, GB2
Mark J. Struglinski - Bridgewater NJ
John B. Gardiner - Mountainside NJ

Assignee:

Exxon Chemical Patents Inc. - Linden NJ

International Classification:

C10M14906
C10M13352

US Classification:

252 515A

Abstract:

The present invention relates to novel multifunctional viscosity modifiers comprising a mixture of derivatized ethylene-alpha olefin copolymers, A and B. Said A copolymer comprising from about 30 to about 60 weight percent monomer units derived from ethylene and said B copolymer comprising from about 60 to about 80 weight percent units derived from ethylene.

US Patent:

53486730, Sep 20, 1994

Filed:

Dec 8, 1993

Appl. No.:

8/163601

Inventors:

David Y. Chung - Edison NJ
Antonio Gutierrez - Mercerville NJ
Mark J. Struglinski - Bridgewater NJ

Assignee:

Exxon Chemical Patents Inc. - Linden NJ

International Classification:

C10M14906

US Classification:

252 47

Abstract:

Composition of matter useful as multifunctional viscosity index improver for lubricating oil comprising reaction product of: (i) (a) molecular weight degraded ethylene-alpha-olefin copolymer obtained by degrading copolymer of ethylene and at least one other alpha-olefin monomer, said copolymer comprising intramolecularly heterogeneous copolymer chains containing at least one crystallizable segment of methylene units and at least one low crystallinity ethylene-alpha-olefin copolymer segment, wherein said copolymer has a molecular weight distribution characterized by at least one of a ratio of M. sub. w /M. sub. n of less than 2 and a ratio of M. sub. z /M. sub. w of less than 1. 8, and said degraded copolymer grafted with (b) ethylenically monounsaturated carboxylic acid material having 1 to 2 carboxylic acid groups or anhydride group to form grafted ethylene copolymer; (ii) about C. sub. 50 to about C. sub. 400 hydrocarbyl substituted carboxylic acid component containing 1 to 2 carboxylic acid groups or anhydride group; (iii) thioamido-amine; and (iv) C. sub.

US Patent:

52908682, Mar 1, 1994

Filed:

Sep 16, 1992

Appl. No.:

7/945825

Inventors:

David Y. Chung - Edison NJ
Antonio Gutierrez - Mercerville NJ
Mark J. Struglinski - Bridgewater NJ

Assignee:

Exxon Chemical Patents Inc. - Linden NJ

International Classification:

C08F25504
C10M14302
C10M14500

US Classification:

525285

Abstract:

An oil soluble nitrogen containing grafted degraded ethylene copolymers useful as multifunctional viscosity index improvers or modifiers, such as VI improver-dispersant additives. The nitrogen containing grafted degraded ethylene copolymers are grafted with an ethylenically unsaturated carboxylic acid grafting material and the grafted degraded ethylene copolymers are then reacted with at least one polyamine containing one primary amine group and at least one or more secondary amine groups.