A novel basic metal salt of a dithiocarbamic acid represented by general formula (1) and having a basic component content (=ax3x100) of 30-100 mol %. In formula (1) R1 to R4 represent each independently a C1-C30 lipophilic group; M represents a metal atom selected from among zinc, copper, nickel, iron, cadmium, silver, lead, antimony, tin and bismuth; and a represents a coefficient in the range of 1/3 to 1/10, which salt does not contain phosphorus and can impart an excellent wear resistance when used as a lubricating oil additive; and a lubricating oil composition comprising a lube base oil and the above metal salt, excellent in wear resistance and friction characteristics, and particularly suitable as a lubricating oil for automotive internal-combustion engines.
一种由通式(1)表示的二
硫代
氨基甲酸的新型碱性
金属盐,其碱性成分含量(=ax3x100)为 30-100 摩尔%。在式 (1) 中,R1 至 R4 分别独立地代表一个 C1-C30 亲脂基团;M 代表一个选自
锌、
铜、
镍、
铁、
镉、
银、
铅、
锑、
锡和
铋的
金属原子;a 代表一个在 1/3 至 1/10 范围内的系数,该盐不含
磷,用作润滑油添加剂时可赋予其优异的耐磨性;以及由润滑油基础油和上述
金属盐组成的润滑油组合物,具有优异的耐磨性和摩擦特性,特别适合用作汽车内燃机的润滑油。