Patent ID: 6723684
Filing Date: 2004-04-20
Classification: C10M,C10N

Abstract:
A low torque grease composition having dynamic viscosity (40Â° C.) of 40 to 150 mm2/sec which comprises a base oil consisting of(a) straight-chain perfluoropolyether oil having dynamic viscosity (40Â° C.) of 25 mm2/sec or less and represented by the following general formula: RfO(CF2O)p(C2F4O)q(C3F6O)rRf wherein Rf is a perfluoro lower alkyl group and all of p, q and r is an integer and a sum thereof is an integer of 25 to 45 and (b) straight-chain perfluoropolyether oil having dynamic viscosity (40Â° C.) of 250 mm2/sec or more and represented by the following general formula: RfO(CF2O)p(C2F4O)q(C3F6O)rRf wherein Rf is a perfluoro lower alkyl group and p, q and r are an integer and a sum thereof is an integer of 100 to 200; and (c) polytetrafluoroethylene as a thickener.