| 摘要 |
PURPOSE:To obtain a lubricating oil composition having a frictional coefficient stable to aging and temperature change by compounding a base oil with specific phosphoric or phosphorous ester amine salt and an aliphatic dicarboxylic acid compound. CONSTITUTION:The objective composition is produced by compounding a base oil with (A) a phosphoric or phosphorous ester amine salt expressed by formula 1 and/or formula II (m and n are 1 or 2; R and R' are 4-30C alkyl, aryl or alkyl-substituted aryl) and (B) an aliphatic dicarboxylic acid compound (e.g. adipic acid, suberic acid, sebacic acid, dodecanoic diacid or eicosanoic diacid). The composition is useful as an automatic transmission oil, wet brake oil, etc., of automobile, etc. |
