LUBRICATING OIL COMPOSITION FOR SHOCK ABSORBER

摘要

To provide a shock absorber lubricating oil composition which realizes such a lubricity between rubber and chromium; i.e., materials generally employed in oil seals and piston rods of shock absorbers, that the low-speed-side friction coefficient is low; the high-speed-side friction coefficient is high; and the ratio of the low-speed-side friction coefficient to the high-speed-side friction coefficient is small.;The shock absorber lubricating oil composition includes (A) a base oil composed of a mineral oil and/or a synthetic oil, and (B) a dithiophosphate ester represented by formula (1).

主权项

1. A lubricating oil composition, comprising:
(A) a base oil comprising a mineral oil, a synthetic oil, or both and; (B) a dithiophosphate ester represented by the following formula (1): wherein R1 independently represents a C1 to C8 alkyl group; R2 represents a C1 to C8 alkylene group; and R3 represents a C1 to C8 alkyl group.