Afton Chemical Corporation

Ethyl Corporation

Dsm IP Assets B.v.

Afton Chemical Intangibles LLC

Charles A Passut

Cathy C Devlin

Joe S Bradley

John T Loper

Mark Thomas Devlin

Errol J Olivier

Abbas Kadkhodayan

Carl K Esche

Sanjay Srinivasan

Edmund F Perozzi

Johannes Hendrik Geesink

Paul G Griffin

Patric Meessen

Yoon Soo Song

Michael A Danylo

Joseph S Bradley

Ju-Fu Shiau

Zhaoyao Joe Qiu

Gerardus Arnoldus Rademakers

Gerhard Van Vliet

Philip J Boegner

Yoon S Song

Errol Joseph Olivier

A lubricating oil composition and methods of operating an internal combustion engine to provide improved engine operation. The lubricating composition includes a major amount of oil of lubricating viscosity; and a minor amount of at least one highly grafted, multi-functional olefin copolymer made by reacting an acylating agent with an olefin copolymer having a number average molecular weight greater than about 10,000 up to about 50,000 in the presence of a free radical initiator to provide an acylated olefin copolymer having a degree of grafting (DOG) of the acylating agent on the olefin copolymer of from above about 1.5 to about 3.0 wt. %. The acylated olefin copolymer is then reacted with an amine to provide the highly grafted, multi-functional olefin copolymer.

Olefin copolymer dispersant VI improver and lubricant compositions and uses thereof

Lubricating oil compositions are provided that inhibit coolant-induced oil filter plugging in heavy-duty diesel engines, and particularly CJ-4 and CI-4 PLUS compliant lubricating oil compositions that inhibit coolant-induced oil filter plugging in exhaust gas recirculation or recycle engines.

Lubricating oil compositions for inhibiting coolant-induced oil filter plugging

This invention relates to detergents, lubricating oil additives and compositions, and methods of preparing detergents, lubricating oil additives and compositions. More specifically, this invention relates to novel phenolic dimers.

Phenolic dimers, the process of preparing same and the use 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

The lubricating oil of the present invention has a viscosity suitable for use in a diesel engine and includes at least one functionalized olefin polymer, and at least one zinc dialkyl dithiophosphate (ZDDP). The ZDDP is made from a mixture of primary alcohols or a mixture of primary and secondary alcohols, wherein the lubricant has a high boundary film value greater than or equal to 15, and preferably greater than 60, as measured by using a High Frequency Reciprocating Rig (HFRR).

Diesel engine lubricants

A novel dispersant composition is described which has been found to possess excellent dispersancy performance. When suitably formulated, lubricants can be formed that exhibit superior performance in a wide variety of rigorous qualification tests.

Lubricant compositions of enhanced performance capabilities

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Midlothian, VA, United States of America

Charles A Passut