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US 6,323,164 B1Granted
Dispersant (meth) acrylate copolymers having excellent low temperature properties
AssigneeEthyl Corporation
InventorsGregory P. Liesen, Sanjay Srinivasan
Life of this patent
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Abstract
Polyalkyl (meth)acrylate copolymers comprising from about 12 to about 18 weight percent methyl methacrylate; from about 75 to about 85 weight percent of a C10-C15 alkyl (meth)acrylate; and from about 2 to about 5 weight percent of a nitrogen-containing dispersant monomer provide excellent low temperature properties to lubricating oils.
Claims11
A polyalkyl (meth)acrylate copolymer consisting essentially of units derived from:
- (A) about 12 to about 18 weight percent methyl methacrylate;
- (B) about 75 to about 85 weight percent of at least one C10-C15 alkyl (meth)acrylate;
- and
- (C) about 2 to about 5 weight percent of at least one nitrogen-containing dispersant monomer.
1 more element
A polyalkyl (meth)acrylate copolymer consisting essentially of the reaction product(s) of:
- (A) from about 12 to about 18 weight percent methyl methacrylate;
- (B) from about 75 to about 85 weight percent of at least one C10-C15 alkyl (meth)acrylate;
- and
- (C) from about 2 to about 5 weight percent of at least one nitrogen-containing dispersant monomer.
1 more element
Dependencies are inferred from the claim text.