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US 5,385,682 AGranted
Grease composition
AssigneeExxon Research & Engineering Co.
InventorsTimothy Hutchings, Kathryn M. Pilgrem
Life of this patent
Estimating the term…
Abstract
A flame retardant grease composition comprising a lubricating base oil, a thickener selected from a simple or complex soap of lithium, calcium or sodium, and a flame retardant additive selected from an oxide, hydroxide, carbonate, bicarbonate, hydrogen carbonate or sulphate of an alkali metal or alkaline earth metal, for example calcium oxide, potassium carbonate, potassium hydrogen carbonate or potassium sulphate, or a mixture of two or more thereof.
Claims2
A grease composition comprising:
- (a) a lubricating base oil;
- (b) a thickener selected from a lithium, calcium or sodium soap, or a mixture of two or more thereof;
- and
- (c) a flame retardant additive comprising a mixture containing 1 to 7% by weight, based on the grease composition, of calcium oxide and from 1 to 7% by weight, based on the grease composition, of a potassium compound selected from potassium carbonate, potassium hydrogen carbonate and potassium sulphate.
1 more element
Dependencies are inferred from the claim text.