Zhaoyao J Qiu

8338343, Dec 25, 2012

Jun 8, 2006

11/921858

Patric Meessen - La Calamine, BE
Gerhard Van Vliet - CG Spaubeek, NL
Gerardus Arnoldus Rademakers - GT Heerlen, NL
Johannes Hendrik Geesink - AR Schinnen, NL
Zhaoyao Joe Qiu - Baton Rouge LA, US
Franciscus Victoire Paulus Houtvast - BX Nuth, NL

Lanxess Elastomers B.V. - Geleen

C10M 149/04
C08F 255/00
C08F 255/02

508291, 508459, 508221, 525 69, 525242, 525285, 525301

The invention relates to a process for an additive composition comprising an amidized or imidized polymer. The invention further relates to a highly grafted, multi-functional lubricant additive useful to improve the viscosity index and dispersancy properties of a lubricating oil composition. The present invention also relates to a method of extending lubricant drain intervals and improving fuel economy and fuel economy durability. The additive composition is prepared by: (A) reacting an olefin copolymer of ethylene and at least one C3 to C23 &agr; -olefin comprising from about 15 to 80 mole percent of ethylene, from about 20 to 85 mole percent of said C3 to C23 &agr; -olefin and from about 0 to 15 wt percent of a polyene, said copolymer having a number average molecular weight ranging from 1,000 to 500,000, with an olefinic carboxylic acid acylating agent, said process comprising heating said polymer to a molten condition at a temperature in the range of 60 C. to 240 C. , grafting, in a first extruder or a first mixing device, said olefinic carboxylic acylating agent onto said copolymer, optionally subsequently reducing the molecular weight of said copolymer at a temperature in the range of 250 C.

20060173135, Aug 3, 2006

Jan 31, 2005

11/047067

Cathy Devlin - Richmond VA, US
Charles Passut - Midlothian VA, US
Joe Bradley - Midlothian VA, US
Michael Danylo - Midlothian VA, US
Yoon Song - Richmond VA, US
Sanjay Srinivasan - Midlothian VA, US
Zhaoyao Qiu - Baton Rouge LA, US
Errol Olivier - Baton Rouge LA, US
Patric Meessen - La Calamine, BE
Gerhard Vliet - Maastricht, NL
Gerardus Rademakers - Heerlen, NL
Johannes Geesink - Schinnen, NL

C08F 297/02

525242000

A novel highly grafted, multi-functional olefin copolymer is provided comprising an additive reaction product of a method comprising reacting acylating agent with an olefin copolymer having a number average molecular weight greater than about 1,000 in the presence of a free radical initiator and essentially free of hydrocarbon solvent in an extruder to provide an olefin copolymer intermediate comprising an acylated olefin copolymer having a degree of grafting (DOG) of at least 0.5 wt. %, which copolymer intermediate's molecular weight is reduced, vacuum stripped of unreacted components, pelletized, dissolved in a neutral oil (preferably with inert gas sparging), and further reacted with a polyamine to provide a grafted multi-functional olefin copolymer viscosity modifier, and lubricating oil concentrates and compositions containing the same and uses thereof.