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US 9,290,715 B2Granted
Grease composition
AssigneeShell Oil Company
InventorsKazuya Watanabe, Keiji Tanaka
Life of this patent
Estimating the term…
Abstract
A calcium complex grease composition is disclosed. The grease composition has a high dropping point and a suitable thickness and is stable to heat.
Claims21
A grease composition comprising:
- a base oil and
- a thickening agent comprising a calcium complex soap, wherein the calcium complex soap comprises:
- (1) a calcium soap of a higher fatty acid present in an amount of 2 to 15 parts by mass, wherein the higher fatty acid is a substituted or unsubstituted straight chain higher mono-fatty acid having 18 to 22 carbon atoms,
- (2) a calcium soap of an aromatic fatty acid present in an amount of 0.5 to 3 parts by mass, wherein the aromatic fatty acid is an aromatic mono-fatty acid having a substituted or unsubstituted benzene ring and
- (3) a calcium soap of a lower fatty acid present in an amount of 1 to 5 parts by mass, relative to 100 parts by mass of the overall grease composition, wherein the lower fatty acid is a straight chain saturated lower mono-fatty acid having 2 to 4 carbon atoms
- wherein the amount of the higher fatty acid, relative to 100 parts by mass of the total fatty acid content, is greater than the amount of the lower fatty acid.
3 more elements
A method for preparing a grease composition comprising:
- combining a base oil, calcium hydroxide, a higher fatty acid, an aromatic fatty acid, and a lower fatty acid to form the grease composition wherein:
- (1) the higher fatty acid is a substituted or unsubstituted straight chain higher mono-fatty acid having 18 to 22 carbon atoms present in an amount of 2 to 15 parts by mass,
- (2) the aromatic fatty acid is an aromatic mono-fatty acid having a substituted or unsubstituted benzene ring present in an amount of 0.5 to 3 parts by mass, and
- (3) the lower fatty is a straight chain saturated lower mono-fatty acid having 2 to 4 carbon atoms present in an amount of 1 to 5 parts by mass, relative to 100 parts by mass of the overall grease composition,
- wherein the amount of the higher fatty acid, relative to 100 parts by mass of the total fatty acid content, is greater than the amount of the lower fatty acid.
2 more elements
Dependencies are inferred from the claim text.