Stephen K Mckenna

US Patent:

7371713, May 13, 2008

Filed:

May 23, 2003

Appl. No.:

10/444548

Inventors:

Irwin L. Goldblatt - Edison NJ, US
Shean-Jer Chen - Bridgewater NJ, US
Manish R. Patel - Parlin NJ, US
Stephen T. McKenna - Naperville IL, US

Assignee:

Castrol Limited - Swindon, Wiltshire

International Classification:

C10M 159/12
C08F 255/00

US Classification:

508221, 508231, 508232, 508242, 508454, 525282, 525285, 525296, 5253276

Abstract:

A graft copolymer containing one or more ethylenically-unsaturated, aliphatic or aromatic, nitrogen- and oxygen-containing graftable monomers grafted to a polyolefin is disclosed. Novel monomers, methods of making such monomers, and graft copolymers comprising such monomers are based on reacting an acylating agent with an amine to form a reaction product. The reaction product may include more than one chemical compound formed from the combination of the acylating agent and the amine. The monomer is the graftable, ethylenically unsaturated, aliphatic or aromatic, nitrogen- and oxygen-containing compound(s) of the reaction product. The monomer may, but need not, be recovered from the product mixture. The preferred monomer is the reaction product of maleic anhydride and 4-aminodiphenylamine. Also described is a method of making a dispersant viscosity index improver.

US Patent:

7981847, Jul 19, 2011

Filed:

Feb 11, 2008

Appl. No.:

12/029277

Inventors:

Irwin L. Goldblatt - Edison NJ, US
Shean-Jer Chen - Bridgewater NJ, US
Manish R. Patel - Parlin NJ, US
Stephen T. McKenna - Naperville IL, US

Assignee:

Castrol Limited

International Classification:

C10M 149/00
C10M 159/12
C08F 8/04

US Classification:

508232, 508221, 508241, 508454, 5253276, 5253328, 525338, 525339

Abstract:

A graft copolymer containing one or more ethylenically-unsaturated, aliphatic or aromatic, nitrogen- and oxygen-containing graftable monomers grafted to a polyolefin is disclosed. Novel monomers, methods of making such monomers, and graft copolymers comprising such monomers are based on reacting an acylating agent with an amine to form a reaction product. The reaction product may include more than one chemical compound formed from the combination of the acylating agent and the amine. The monomer is the graftable, ethylenically unsaturated, aliphatic or aromatic, nitrogen- and oxygen-containing compound(s) of the reaction product. The monomer may, but need not, be recovered from the product mixture. The preferred monomer is the reaction product of maleic anhydride and 4-aminodiphenylamine. Also described is a method of making a dispersant viscosity index improver.

US Patent:

20120323018, Dec 20, 2012

Filed:

Jun 20, 2011

Appl. No.:

13/164374

Inventors:

Irwin L. Goldblatt - Edison NJ, US
Shean-Jer Chen - Bridgewater NJ, US
Manish R. Patel - Parlin NJ, US
Stephen T. McKenna - Naperville IL, US

International Classification:

C07D 207/40
C07C 63/00

US Classification:

548545, 562480

Abstract:

A graft copolymer containing one or more ethylenically-unsaturated, aliphatic or aromatic, nitrogen- and oxygen-containing graftable monomers grafted to a polyolefin is disclosed. Novel monomers, methods of making such monomers, and graft copolymers comprising such monomers are based on reacting an acylating agent with an amine to form a reaction product. The reaction product may include more than one chemical compound formed from the combination of the acylating agent and the amine. The monomer is the graftable, ethylenically unsaturated, aliphatic or aromatic, nitrogen- and oxygen-containing compound(s) of the reaction product. The monomer may, but need not, be recovered from the product mixture. The preferred monomer is the reaction product of malcic anhydride and 4-aminodiphenylamine. Also described is a method of making a dispersant viscosity index improver. The monomer of the present invention may be grafted to a polyolefin in solutions or melts. Also described is a lubricating oil comprising a base oil and a grafted polyolefin as described above.