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US 2014/0274842 A1Published application
Viscosity improver grafted with unsaturated acylating agent and a polyaromatic hydrocarbon
AssigneeChevron Oronite Company LLC
InventorsPatrick J. McDougall, Pritesh A. Patel
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Abstract
Disclosed is an oil-soluble lubricating oil additive composition, suitable for use as a dispersant viscosity index improver in lubricating oils; prepared by the process which comprises reacting a hydrocarbon polymer having a number average molecular weight (Mn) between about 7,000 and about 500,000 wherein the polymer backbone has been functionalized with an ethylenically unsaturated acylating agent and a hydroxyl-linked polycyclic fused ring component.
Claims25
An oil-soluble lubricating oil additive composition prepared by the process which comprises reacting:
- (a) a hydrocarbon polymer having a number average molecular weight (Mn) between about 7,000 and about 500,000;
- (b) an ethylenically unsaturated acylating agent;
- and
- (c) a hydroxyl-linked polycyclic hydrocarbon compound having 3 to 6 contiguous fused carbocyclic rings wherein the carbocyclic ring is independently selected from 5 to 7 carbon atoms and the polycyclic hydrocarbon compound contains at least 5π bonds.
1 more element
Dependencies are inferred from the claim text.