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US 3,981,812 AGranted
High temperature thermally stable greases
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorAlex Zletz
Life of this patent
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Abstract
A lubricating grease compound of a perfluoropolyether lubricant vehicle thickened with a mixture of a substituted polyphenylene and a silicone fluid.
Claims1
A lubricating grease composition composed of a mixture of from about 4 to about 13 percent by weight of a substituted polyphenylene thickening agent selected from the group consisting of nitropolyphenylene and aminopolyphenylene;
- from about 0.75 to about 10 percent by weight of a silicone co-thickening agent selected from the group consisting of dimethyl silicone and phenylmethyl silicone;
- and the balance substantially all a perfluoropolyether lubricating vehicle.
Dependencies are inferred from the claim text.