LUBRICATING OIL COMPOSITION FOR SLIDING GUIDE SURFACE Russian patent published in 2019 - IPC C10M169/04 C10M141/10 C10M137/12 C10M129/40 C10M105/04 C10M101/02 C10M107/02 C10N30/06 C10N40/00 C10N40/06 

FIELD: chemistry.

SUBSTANCE: lubricating oil composition contains base oil, wherein base oil is base oil belonging to group III, and/or base oil belonging to group IV, in categories of API base oils; phosphonate represented by formula (1), in which R₁ denotes a saturated or unsaturated alkyl group having 12–22 carbon atoms, and R₂ denotes a saturated or unsaturated alkyl group having 1–18 carbon atoms and a fatty acid represented by formula (2), in which R₃ denotes a saturated or unsaturated alkyl group having 7–17 carbon atoms.

(1), R₃COOH (2).

EFFECT: present invention relates to lubricating oil composition for guide sliding surface, which has demonstrated excellent characteristics of low friction coefficient and extreme-pressure characteristics so as to ensure high accuracy of processing on machine.

3 cl, 3 tbl