| 摘要 |
Gear oils containing, in combination, (i) a carboxylic derivative such as a succinimide, boronated succinimide, succinic acid ester, boronated succinic acid ester, succinic acid salt, (or any mixture of these), in which the succinic moiety is substituted by a group derived from polyalkene having an Mn value of 500 to 10,000; and (ii) one or more fully-esterified hydrocarbyl esters of a phosphoric acid or phosphorothioic acid have enhanced performance characteristics. Preferably there is also present at least one amine salt of at least one long chain monocarboxylic or polycarboxylic acid. |
