Lubricants Containing Olefin Copolymer and Acrylate Copolymer
First Claim
1. A method of lubricating a driveline using a lubricating oil composition comprising an oil of lubricating viscosity and a total of from about 1 to about 50% by weight of copolymers comprising:
- (A) at least one ethylene-aliphatic olefin copolymer wherein the aliphatic olefins contain from 3 to about 24 carbon atoms, said copolymer (A) having Mn ranging from about 600 to about 5000; and
(B) at least one copolymer comprising units derived from (a) about 35 mole % to about 95 mole % of alkyl methacrylate ester monomers containing from about 9 to about 25 carbon atoms in the ester group and (b) about 65 mole % to about 5 mole % of alkyl methacrylate ester monomers containing from about 7 to about 12 carbon atoms in the ester group and wherein the alkyl moieties of the ester groups of alkyl methacrylate ester monomer (b) have 2-(C1-4 alkyl) substituents, and (c) optionally, from about 0.1 mole % to about 20 mole % of at least one member of the group consisting of alkyl methacrylate ester monomers containing from 2 to about 8 carbon atoms in the ester group, which esters are different from methacrylate esters (a) and (b), vinyl aromatic monomers and nitrogen-containing vinyl monomers, with the proviso that no more than 60% by weight of the esters contain not more than 11 carbon atoms in the ester group, said copolymer (B) having Mn ranging from about 10,000 to about 350,000;
wherein the weight ratio of (A);
(B) ranges from about 99;
1 to about 1;
99.
0 Assignments
0 Petitions
Accused Products
Abstract
A lubricating oil composition comprising an oil of lubricating viscosity and a total of from about 1 to about 50% by weight of copolymers comprising (A) at least one ethylene-aliphatic olefin copolymer wherein the aliphatic olefins contain from 3 to about 24 carbon atoms, said copolymer (A) having
-
Citations
11 Claims
-
1. A method of lubricating a driveline using a lubricating oil composition comprising an oil of lubricating viscosity and a total of from about 1 to about 50% by weight of copolymers comprising:
-
(A) at least one ethylene-aliphatic olefin copolymer wherein the aliphatic olefins contain from 3 to about 24 carbon atoms, said copolymer (A) having M n ranging from about 600 to about 5000; and
(B) at least one copolymer comprising units derived from (a) about 35 mole % to about 95 mole % of alkyl methacrylate ester monomers containing from about 9 to about 25 carbon atoms in the ester group and (b) about 65 mole % to about 5 mole % of alkyl methacrylate ester monomers containing from about 7 to about 12 carbon atoms in the ester group and wherein the alkyl moieties of the ester groups of alkyl methacrylate ester monomer (b) have 2-(C1-4 alkyl) substituents, and (c) optionally, from about 0.1 mole % to about 20 mole % of at least one member of the group consisting of alkyl methacrylate ester monomers containing from 2 to about 8 carbon atoms in the ester group, which esters are different from methacrylate esters (a) and (b), vinyl aromatic monomers and nitrogen-containing vinyl monomers, with the proviso that no more than 60% by weight of the esters contain not more than 11 carbon atoms in the ester group, said copolymer (B) having M n ranging from about 10,000 to about 350,000;
wherein the weight ratio of (A);
(B) ranges from about 99;
1 to about 1;
99. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
-
Specification