Frederick J Boden

US Patent:

6686321, Feb 3, 2004

Filed:

Oct 9, 2001

Appl. No.:

09/973585

Inventors:

Frederick J. Boden - Somerset NJ
Richard P. Sauer - North Plainfield NJ
Irwin L. Goldblatt - Edison NJ
Michael E. McHenry - Washington NJ

Assignee:

Castrol Limited

International Classification:

C10M14910

US Classification:

508221, 508543, 525279, 525281, 525282, 525283, 525293, 525296, 525309, 525315

Abstract:

A grafted polyolefin containing one or more of N-vinylimidazole, 4-vinylpyridine, or other ethylenically-unsaturated nitrogen-containing or oxygen-containing graftable monomers grafted to a polyolefin copolymer is disclosed. The grafted polyolefin preferably has a weight average molecular weight of from about 20,000 to about 500,000, a polydispersity of less than about 10, and an ADT value of at least about 8. The grafted polyolefin can be defined as containing more than about 1. 2% by weight of grafted monomer on a polyolefin, or as containing at least about 13 moles of graftable monomers per mole of polyolefin, or as having an asphaltene dispersancy test (ADT) value of at least about 8. Also described is a lubricating oil comprising a lubricant base oil and a grafted polyolefin as described above. Also described is a method of making a dispersant viscosity index improver. N-vinyl-imidazole or other ethylenically unsaturated nitrogen-containing and/or oxygen-containing graftable monomers and a graftable polyolefin are reacted with enough of an initiator to graft the monomer to the polyolefin.

US Patent:

56631260, Sep 2, 1997

Filed:

Oct 10, 1995

Appl. No.:

8/541832

Inventors:

Frederick J. Boden - Somerset NJ
Richard P. Sauer - North Plainfield NJ
Irwin L. Goldblatt - Edison NJ
Michael E. McHenry - Washington NJ

Assignee:

Castrol Limited - Wiltshire

International Classification:

C10M14910
C08F27902

US Classification:

508221

Abstract:

A grafted polyolefin containing N-vinylimidazole, 4-vinylpyridine, or other ethylenically-unsaturated nitrogen- or oxygen-containing graftable monomers grafted to a polyolefin copolymer. The grafted polyolefin preferably has a weight average molecular weight of from about 20,000 to about 500,000 and a polydispersity of less than about 10. The grafted polyolefin can contain more than about 1. 2% by weight of grafted monomer or 13 or more moles of graftable monomers per mole of polyolefin and have an asphaltene dispersancy test (ADT) value of at least about 8. Also described is a lubricating oil comprising such a grafted polyolefin. Also described is a method of making a grafted polyolefin dispersant viscosity index improver by adding the graft monomer or the initiator slowly during the reaction. The present reaction can optionally be carried out by providing a melted reactant composition in an extruder or other polymeric mixer.

US Patent:

58743898, Feb 23, 1999

Filed:

Aug 29, 1997

Appl. No.:

8/920393

Inventors:

Frederick J. Boden - Somerset NJ
Richard P. Sauer - North Plainfield NJ
Irwin L. Goldblatt - Edison NJ
Michael E. McHenry - Washington NJ

Assignee:

Castrol Limited - Wiltshire

International Classification:

C10M14910
C08F27902

US Classification:

508221

Abstract:

A grafted polyolefin containing one or more of N-vinylimidazole, 4-vinylpyridine, or other ethylenically-unsaturated nitrogen-containing or oxygen-containing graftable monomers grafted to a polyolefin copolymer is disclosed. The grafted polyolefin preferably has a weight average molecular weight of from about 20,000 to about 500,000, a polydispersity of less than about 10, and an ADT value of at least about 8. The grafted polyolefin can be defined as containing more than about 1. 2% by weight of grafted monomer on a polyolefin, or as containing at least about 13 moles of graftable monomers per mole of polyolefin, or as having an asphaltene dispersancy test (ADT) value of at least about 8. Also described is a lubricating oil comprising a lubricant base oil and a grafted polyolefin as described above. Also described is a method of making a dispersant viscosity index improver.

US Patent:

58145869, Sep 29, 1998

Filed:

May 7, 1996

Appl. No.:

8/646454

Inventors:

Frederick J. Boden - Somerset NJ
Richard P. Sauer - North Plainfield NJ
Irwin L. Goldblatt - Edison NJ
Michael E. McHenry - Washington NJ

Assignee:

Castrol Limited - Swindon

International Classification:

C10M14910
C08F27902

US Classification:

508221

Abstract:

A grafted polyolefin containing at least about 13 moles of N-vinylimidazole or other ethylenically-unsaturated nitrogen-containing and/or oxygen-containing monomers per mole of a grafted polyolefin backbone is disclosed. The graft polyolefin has a weight average molecular weight of from about 20,000 to about 500,000 and a polydispersity of less than about 10. The grafted polyolefin can alternatively be defined as containing more than about 1. 2% by weight of grafted monomer on a polyolefin. Also described is a lubricating oil comprising a lubricant base oil and a grafted polyolefin as described above. Also described is a method of making a dispersant-viscosity index improver. N-vinylimidazole or other ethylenically unsaturated nitrogen-containing and/or oxygen-containingmonomers and a graftable polyolefin are reacted with enough of an initiator to graft at least about 13 moles of the monomer to each mole of the polyolefin. The initiator and/or monomer is added to the other ingredients, maintained at the reaction temperature, over a period of time. The reaction temperature is maintained at a level high enough to give acceptable reaction times.

US Patent:

63002892, Oct 9, 2001

Filed:

Dec 22, 1999

Appl. No.:

9/469867

Inventors:

Frederick J. Boden - Somerset NJ
Richard P. Sauer - North Plainfield NJ
Irwin L. Goldblatt - Edison NJ
Michael E. McHenry - Washington NJ

Assignee:

Castrol Limited - Wiltshire

International Classification:

C10M14910
C08F27902

US Classification:

508221

Abstract:

A grafted polyolefin containing one or more of N-vinylimidazole, 4-vinylpyridine, or other ethylenically-unsaturated nitrogen-containing or oxygen-containing graftable monomers grafted to a polyolefin copolymer is disclosed. The grafted polyolefin preferably has a weight average molecular weight of from about 20,000 to about 500,000, a polydispersity of less than about 10, and an ADT value of at least about 8. The grafted polyolefin can be defined as containing more than about 1. 2% by weight of grafted monomer on a polyolefin, or as containing at least about 13 moles of graftable monomers per mole of polyolefin, or as having an asphaltene dispersancy test (ADT) value of at least about 8. Also described is a lubricating oil comprising a lubricant base oil and a grafted polyolefin as described above. Also described is a method of making a dispersant viscosity index improver.

US Patent:

55230083, Jun 4, 1996

Filed:

Oct 21, 1994

Appl. No.:

8/327508

Inventors:

Frederick J. Boden - Somerset NJ
Richard P. Sauer - North Plainfield NJ
Irwin L. Goldblatt - Edison NJ
Michael E. McHenry - Washington NJ

Assignee:

Castrol Limited - Swindon

International Classification:

C10M14910
C08F27902

US Classification:

252 50

Abstract:

A grafted polyolefin containing at least about 13 moles of N-vinylimidazole or other ethylenically-unsaturated nitrogen-containing and/or oxygen-containing monomers per mole of a grafted polyolefin backbone is disclosed. The graft polyolefin has a weight average molecular weight of from about 20,000 to about 500,000 and a polydispersity of less than about 10. The grafted polyolefin can alternatively be defined as containing more than about 1. 2% by weight of grafted monomer on a polyolefin. Also described is a lubricating oil comprising a lubricant base oil and a grafted polyolefin as described above. Also described is a method of making a dispersant-viscosity index improver. N-vinylimidazole or other ethylenically unsaturated nitrogen-containing and/or oxygen-containing monomers and a graftable polyolefin are reacted with enough of an initiator to graft at least about 13 moles of the monomer to each mole of the polyolefin.