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US 5,210,123 AGranted
Grease compositions employing a vinylidene fluoride-hexafluoroisobutylene copolymer thickening agent
AssigneeDow Corning Corporation
InventorGerardo Caporiccio
Life of this patent
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Abstract
A vinylidene fluoride-hexafluoroisobutylene copolymer powder is employed to thicken a conventional fluorine-containing liquid lubricant to provide a grease composition which has improved lubrication character in metal bearing subjected to the simultaneous conditions of high load, high speed and elevated temperature.
Claims16
A grease composition comprising:
- (I) 7 to about 35 parts by weight of a thickening agent comprising a vinylidene fluoridehexafluoroisobutylene copolymer powder having a molar ratio of vinylidene fluoride mer units to hexafluoroisobutylene mer units of about 1:1, said thickening agent being uniformly dispersed in
- (II) 93 to about 65 parts by weight of a liquid lubricant selected from the group consisting of
- (i) a telomer of chlorotrifluoroethylene having a viscosity of 10 to 1,000 cS at 40.degree. C.;
- (ii) a fluorosilicone copolymer having a viscosity of 30 to 10,000 cS at 25.degree. C.;
- and
- (iii) a perfluoropolyether having a viscosity of 30 to 10,000 cS at 20.degree. C.
3 more elements
Dependencies are inferred from the claim text.