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US 4,185,031 AGranted
Fluorinated phosphinic acids
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorsHyman D. Gillman, James P. King
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Abstract
Fluorinated phosphinic acids prepared by reaction of fluorinated olefins with an acid containing one or more P-H bonds in the presence of a free radical initiator. The reaction products of the acids with various metal centers are effective grease thickeners for liquid lubricants.
Claims4
A fluorinated phosphinic acid having the following formula:
- R(R.sub.f CH.sub.2 CH.sub.2)P(O)OH,
- wherein R is alkyl or aryl and R.sub.f is perfluoroalkyl.
Dependencies are inferred from the claim text.