Grease composition
AssigneeShell Oil Company
InventorsKeiji Tanaka, Kazuya Watanabe
Life of this patent
Estimating the term…
Abstract
The invention provides a grease composition, being a grease composition containing a base oil and, as a thickener a calcium complex soap, and being a grease composition using for the carboxylic acids forming the aforementioned calcium complex soap substituted or unsubstituted C18-22 straight-chain higher fatty acids, aromatic monocarboxylic aromatic acids having substituted or unsubstituted benzene rings and C2-4 straight-chain saturated lower fatty acids, wherein the aforementioned substituted or unsubstituted C18-22 straight-chain higher fatty acids include behenic acid and the amount of behenic acid used, as a mass ratio in terms of the total amount of the aforementioned substituted or unsubstituted C18-22 straight-chain higher fatty acids used, is from 25 mass % up to 70 mass %.
Claims7
A grease composition comprising:
- (a) a base oil;
- and
- (b) a calcium complex soap thickener content ranging from 5 mass % to 20 mass %, by mass of the grease composition, wherein the calcium complex soap thickener is a reaction product of a plurality of carboxylic acids and a calcium hydroxide, the plurality of carboxylic acids comprising:
- (i) 2 mass % to 15 mass % of a C18-C22 straight chain higher fatty acids having a behenic acid content ranging from 25 mass % to 70 mass %, by mass of the C18-C22 straight chain higher fatty acids;
- (ii) 0.5 mass % to 3 mass % of an aromatic monocarboxylic acids comprising substituted or unsubstituted benzene rings, and
- (iii) 1 mass % to 5 mass % of a C2-C4 straight-chain saturated lower fatty acids.
Dependencies are inferred from the claim text.