Lubricant composition

摘要

A lubricating oil composition comprising a lubricating base oil, and a mixture and/or a reaction product of (A) 0.01-0.5% by mass of at least one compound selected from among acid phosphates represented by formula (1) or formula (2), and (B) 0.01-2% by mass of an alkylamine represented by formula (3), based on the total weight of the composition, wherein the acid value due to component (A) is 0.1-1.0 mgKOH/g. [R1 and R2 represent hydrogen or straight-chain alkyl or straight-chain alkenyl groups, with at least one of R1 and R2 being a C6-12 straight-chain alkyl or straight-chain alkenyl group; R3 and R4 represent hydrogen straight-chain alkyl or straight-chain alkenyl groups, with at least one of R3 and R4 being a C13-18 straight-chain alkyl or straight-chain alkenyl group; and R5 and R6 represent hydrogen or C4-30 branched-chain alkyl groups, with at least one of R5 and R6 being a branched-chain alkyl group.];

主权项

1. A method for lubricating a machine tool sliding guide surface comprising:
lubricating a machine tool sliding guide surface with a lubricating oil composition comprising: a lubricating base oil and a mixture and/or a reaction product of (A) 0.01-0.5% by mass of at least one compound selected from among acid phosphates represented by the following formula (1) or (2), and (B) 0.01-2% by mass of an alkylamine represented by the following formula (3), based on the total weight of the composition, wherein the acid value due to component (A) is 0.1-1.0 mgKOH/g and the acid phosphates of component (A) are a mixture of a phosphoric acid monoester and a phosphoric acid diester; wherein R1 and R2 may be the same or different, and each represents hydrogen or a straight-chain alkyl, and at least one of R1 and R2 is a C6-12 straight-chain alkyl; wherein R3 and R4 may be the same or different, and each represents hydrogen or a straight-chain alkenyl group, and at least one of R3 and R4 is a C13-18 straight-chain alkyl or a straight-chain alkenyl group; and wherein R5 and R6 may be the same or different, and each represents hydrogen or a C6-14 branched-chain alkyl group, and at least one of R5 and R6 is a branched-chain alkyl group.