Modified triglyceride metal working lubricants
AssigneeEmery Industries, Inc.
InventorRobert J. Sturwold
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Abstract
Mixed ester products obtained by treatment of a triglyceride under transesterification conditions with a polyoxyalkylene glycol and a high molecular weight dicarboxylic acid, such as polymer acids, are useful metal working fluid. The modified triglycerides exhibit enhanced thermal stability and can be used either in neat form or in solution and are readily compatible with water to provide stable aqueous emulsions and dispersions having superior lubrication properties.
Claims10
A modified triglyceride exhibiting enhanced thermal stability and useful as a lubricant for both ferrous and non-ferrous metals and alloys comprising the reaction product of:
- a. 50-84 parts triglyceride derived predominantly from C.sub.12 to C.sub.18 fatty acids,
- b. 2-36 parts polyoxyalkylene glycol having an average molecular weight less than about 2000, and
- c. 7-48 parts aliphatic or cycloaliphatic hydrocarbon dicarboxylic acid containing 18 to 54 carbon atoms;
- said tranesterification reaction conducted until at least 25% reduction in acid value, based on the initial charge, is obtained.
An aqueous lubricant composition containing a major proportion of water with about 0.1 to 25% by weight of a modified triglyceride obtained by transesterifying 50-84 parts triglyceride derived predominantly from C.sub.12 -C.sub.18 fatty acids, 2-36 parts polyoxyethylene glycol having an average molecular weight from about 200 to 1500 and 7-48 parts of an aliphatic or cycloaliphatic hydrocarbon dicarboxylic acid containing 18 to 54 carbon atoms until the acid value is reduced by at least 25%.
Dependencies are inferred from the claim text.