Patent ID: 6750185
Filing Date: 2004-06-15
Classification: C10M,C10N

Abstract:
A lubricant oil composition for internal combustion engines comprising a lubricant base oil incorporated with 0.01 wt % or more, based on the total weight of the lubricant oil composition, of a nonionic surfactant, with alkylene oxide added thereto, consisting of at least one compound selected from the group consisting of general formulae (III) to (VI)wherein said general formulae (III) to (VI) are: wherein R3, R4, R5 and R6, which may be the same or different, each represents an alkyl group having 8-30 carbon atoms; an alkenyl group having 8-30 carbon atoms; an aromatic hydrocarbon group having 6-30 carbon atoms; or an aromatic hydrocarbon group substituted by at least one alkyl group or alkenyl group having 8-24 carbon atoms; and wherein R3-R10, which may be the same or different, each represents an alkylene group; and wherein m and n, which may be the same or different, each represents the polymerization number of alkylene oxides; and wherein Y represents the frame part of a polyhydric alcohol component; and wherein p and q each represents an integer of 1 or more, and the total thereof is not more than the number of hydroxyl groups of the polyhydric alcohol; and wherein R55 represents an alkylene group; and wherein at least one of said compound has an HLB value of about 15 or more and a molecular weight of about 900 or more.