| 摘要 |
PROBLEM TO BE SOLVED: To obtain good lubricating performance, high extreme-pressure performance and good adhesion strength to a diamond-like carbon protective film by using a lubricant essentially comprising a specified phosphagene compd. SOLUTION: A phosphagene compd. expressed by the formula is used as the main component. In the formula, R is a hydrogen atom, 1-4C alkyl, 1-4C alkoxy or 1-4C haloalkyl group, (a) and (b) are each real numbers 0 to 2,(x) is 1, 2, 3 or 4, (y) is 3 or 4. The phosphagene compd. expressed by the formula is prepared, for example, by the reaction of phosphonitrile halide oligomers and alkali metal salts of phenols or alkali metal salts of fluoroalcohols. As for the phosphonitrile halide oligomers, for example, a phosphonitrile chloride trimer can be be used. The obtd. phosphagene compd. as it is may be used as the lubricant. |
