05936041 is referenced by 52 patents and cites 52 patents.

The invention pertains to improved lubricating oil dispersants wherein a fractionating polymer is prepared prior to functionalization (e.g., in the Koch reaction) for making dispersant additives. In one aspect, it was discovered that by fractionating a polymer to remove light hydrocarbon and unreacted monomer from the polymer before the carbonylation step of the Koch reaction, the amount of light ester impurities generated was minimized. Light ester is an undesirable byproduct that adversely affects the recycle of the catalyst from the functionalization step of the Koch reaction. The invention also pertains to improved lubricating oil nitrogen-containing dispersant additives derived from fractionated polymer.

Title
Dispersant additives and process
Application Number
261557
Publication Number
5936041
Application Date
December 27, 1995
Publication Date
August 10, 1999
Inventor
James P Stokes
Warren
NJ, US
Jon E Stanat
Westfield
NJ, US
David C Dankworth
Whitehouse Station
NJ, US
William B Eckstrom
Fanwood
NJ, US
Jacob Emert
Brooklyn
NY, US
Keith R Gorda
Little York
NJ, US
Joseph V Cusumano
Watchung
NJ, US
William B Diana
Belle Mead
NJ, US
Agent
J B Murray Jr
K R Walton
Assignee
Exxon Chemical Patents
NJ, US
IPC
C08F 8/32
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