A biodegradable lubricating oil composition includes (A) an ester represented by a formula (1) below, the ester having a kinematic viscosity in a range from 300 mm2/s to 1000 mm2/s at 40 degrees C and an acid value of 0.5 mgKOH/g or less; (B) an ester being obtained by reacting a straight-chain saturated aliphatic carboxylic acid with a polyhydric alcohol, the ester having an acid value of 0.5 mgKOH/g or less; and (C) a phosphate amine salt being obtained by reacting an acidic phosphate with an alkylamine.
In the formula, Ra is a hydrocarbyl group having 4 to 20 carbon atoms, Rb is a hydrocarbyl group having 4 to 18 carbon atoms, Rc is an acyl group having 1 to 10 carbon atoms, and n is an integer of 3 to 15.
一种可
生物降解的润滑油组合物包括:(A) 由下式(1)表示的酯,该酯在 40 摄氏度时的运动粘度范围为 300 mm2/s 至 1000 mm2/s,酸值为 0.5 mgKOH/g 或更低;(B) 由直链饱和脂肪族
羧酸与多元醇反应得到的酯,该酯的酸值为 0.5 mgKOH/g 或更低;(C) 由酸性
磷酸盐与烷基胺反应得到的
磷酸盐胺盐。
式中,Ra 是具有 4 至 20 个碳原子的烃基,Rb 是具有 4 至 18 个碳原子的烃基,Rc 是具有 1 至 10 个碳原子的酰基,n 是 3 至 15 的整数。