| 摘要 |
A lubricant composition which has an oil, preferably a mineral oil and an ester. The ester is the reaction product of: i) an aliphatic hydrocarbon polyol, ii) a dimer fatty acid and a trimer fatty acid in a weight ratio in the range of 15:85 to 70:30 and iii) a monocarboxylic acid having 14-24 carbon atoms wherein at the start of the reaction the ratio of hydroxyl groups to carboxyl groups is in the range of 0.85:1 to 1.3:1, and the weight ratio of ii) to iii) is in the range of 50:50 to 85:15 and/or obtained by reacting a branched saturated alkane diol, a dimer fatty acid and a dicarboxylic acid having 4-10 carbon atoms. The lubricant compositions exhibit improved load bearing capability especially when at least one additive selected from the group consisting of sulphur-containing synthetic additives, sulphur- containing oleochemical additives and phosphorus-containing additives is present. |
