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US 8,658,579 B2Granted
Lubricating grease compositions
AssigneeShell Oil Company
InventorStefan Daegling
Life of this patent
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Abstract
Lubricating grease composition comprising: (i) a base oil; and (ii) a thickener system comprising (i) a lithium soap of a first carboxylic acid selected from C12-C24 hydroxy carboxylic acids and (ii) a lithium soap of a second carboxylic acid selected from C12-C24 branched carboxylic acids, C12-C24 dihydroxy carboxylic acids and mixtures thereof. The lubricating grease compositions according to the present invention have improved oil bleeding and shear stability properties, as well as improved grease lifetime and increased relubrication intervals.
Claims30
A lubricating grease composition comprising:
- (a) a base oil;
- (b) a thickener system comprising (i) a lithium soap of a first carboxylic acid selected from a C12-C24 hydroxy carboxylic acid and (ii) a lithium soap of a second carboxylic acid selected from a branched C12-C24 carboxylic acid;
- and
- (c) a polymer selected from polymers and copolymers of ethylene and olefins, and polymers and copolymers of acrylic acid.
1 more element
A method comprising:
- applying a lubricating grease composition to a surface in relative movement to another surface, wherein the lubricating grease composition comprises:
- (a) a base oil;
- (b) a thickener system comprising (i) a lithium soap of a first carboxylic acid selected from a C12-C24 hydroxy carboxylic acid and (ii) a lithium soap of a second carboxylic acid selected from a branched C12-C24 carboxylic acid;
- and
- (c) a polymer selected from polymers and copolymers of ethylene and olefins, and polymers and copolymers of acrylic acid.
2 more elements
Dependencies are inferred from the claim text.