| abstract |
Project of the invention is to provide a kind of lubricant compositions that the lubricity under the harsh conditions such as high temperature and/or high pressure is excellent.The present invention relates to a kind of lubricant compositions, and containing condensation product A, condensation product A is at least condensed by following substance: the alkylene oxide addition product a1 of 3 yuan or more of polyalcohol；The presoma of the polybasic carboxylic acid a2 of 2 yuan or more of polybasic carboxylic acid a2 or 2 yuan or more；And it is at least one kind of in monocarboxylic acid a3, the presoma of monocarboxylic acid a3 and monohydric alcohol a4, at least one addition of the alkylene oxide addition product a1 of described 3 yuan or more of the polyalcohol hydroxyl as possessed by polyalcohol of the alkylene oxide with 3 yuan or more and formed. |