Patent ID: 8609598
Filing Date: 2013-12-17
Classification: C10M,C10N

Abstract:
1. A nitrate free grease composition for avoiding an abnormal peeling of a rolling surface of a bearing, said nitrate free grease composition comprising: a base oil, a thickener, and an additive, wherein the base oil consists of symthesized hydrocarbon oil and 20% by weight or more of alkyldiphenyl ether oil or consists of alkyldiphenyl ether oil, and has a kinetic viscosity of 20 to 150 mm where R2 and R4 are the same or different, and represent each an aromatic hydrocarbon group having 6 to 15 carbon atoms, and R3 represents an aromatic hydrocarbon group having 6 to 15 carbon atoms, and is contained in an amount of 5 to 30% by weight based on the total amount of the base oil and the thickener, and wherein the additive contains as an essential component 1 to 3 parts by weight of a sodium sebacate based on 100 parts by weight of the base oil and the thickener, wherein the additive contains a rust preventative which is a partially esterified multivalent alcohol or an organic sulfonic acid salt of an alkali metal or an alkali earth metal.