| 摘要 |
A two-cycle oil dispersant additive which substantially avoids the formation of gelled agglomerates at low temperatures and which correspondingly provides effective engine cleanliness, detergency, lubricity and wear inhibition comprising: a dispersant (I) which is a nitrogen-containing compound prepared by reacting (A) at least one polyalkylene polyamine and (B) at least one monocarboxylic acid acylating agent, and optionally (C) at least one high molecular weight substituted carboxylic acid acylating agent; and (II) at least one wax crystal modifier which is a "comb" type copolymer of a mono or dialkyl ester of a monoethylenically unsaturated C4 to C8 mono or dicarboxylic acid or anhydride wherein the number of carbon atoms in the n-alkyl groups is 14.
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