The synthetic lube null which contains fluorine-containing ester

摘要

PURPOSE:To assure an adhesive property and lubricity under any use conditions and to maintain a lubricating effect over a long period of time by compounding the resulted product of esterification of the perfluorodicarboxylic acid and fluorodiol expressed by prescribed formulas. CONSTITUTION:The synthetic lubricating oil is obtd. by compounding the resulted product of esterification of the perfluorodicarboxylic acid expressed by formula I and the fluorodiol expressed by formula II. In the formula I and the formula II, n is 2 to 10 integer; l, m, x, y are 1 to 3 integer. The perfluorodicarboxylic acid is preferably perfluorosuccinic acid, perfluoroadipic acid and perfluorosebacic acid. The fluorodiol is preferably the respective diols of n=4, 6, 8 or n=5, 7 in the formula II. The substitution of a part or the whole of the perfluorodicarboxylic acid of the formula I with aliphat. dicarboxylic acid and sulfurcontained dicarboxylic acid is possible as well.