Afton Chemical Corporation

Dsm IP Assets B.v.

Michael A Danylo

Yoon Soo Song

Errol J Olivier

Sanjay Srinivasan

Johannes Hendrik Geesink

Charles A Passut

Cathy C Devlin

Anthony Fagan

Patric Meessen

Gerardus Arnoldus Rademakers

Zhaoyao Joe Qiu

Joseph S Bradley

Joe S Bradley

Gerhard Van Vliet

Errol Joseph Olivier

A novel highly grafted, functionalized olefin polymer is provided comprising the reaction product of a method comprising reacting an acylating agent with a mixture comprising an olefin polymer having a number average molecular weight of between about 5,000 to about 100,000 and a diluent in the presence of a free radical initiator to provide an acylated olefin polymer which is further reacted with a polyamine to provide the grafted functionalized olefin polymer dispersant. Lubricating oil concentrates and compositions containing the highly grafted, functionalized olefin polymer and uses thereof also are provided.

Graft functionalized olefin polymer dispersant and uses thereof

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.

Grafted multi-functional olefin copolymer VI modifiers and uses thereof

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Midlothian, VA, United States of America

Michael A Danylo