A fuel additive composition comprising:
a) a Mannich condensation product of (1) a high molecular weight alkyl-substituted hydroxyaromatic compound; (2) an amine having the formula:
wherein A is CH or nitrogen, R1, R2, R3 are independently hydrogen or lower alkyl of 1 to about 6 carbon atoms and each R2 and R3 is independently selected in each -CR2R3- unit, and x is an integer from 1 to about 6;
and (3) an aldehyde, wherein the respective molar ratio of reactants (1), (2), and (3) is 1:0.1-2:0.1-2;
b) a hydrocarbyl-terminated poly(oxyalkylene) monool; and
c) a carboxylic acid as represented by the formula:
R4(COOH)y
or anhydride thereof, wherein R4 represents a hydrocarbyl group having about 2 to about 50 carbon atoms, and y represents an integer of 1 to about 4.
一种燃料添加剂组合物,包括
a) (1) 高分子量烷基取代的羟基芳香化合物;(2) 具有以下式子的胺的曼尼希缩合产物:
其中 A 是 CH 或氮,R1、R2、R3 独立地是氢或 1 至约 6 个碳原子的低级烷基,每个 R2 和 R3 独立地选择在每个 -CR2R3- 单元中,且 x 是 1 至约 6 的整数;
和 (3) 醛,其中反应物(1)、(2)和(3)各自的摩尔比为 1:0.1-2:0.1-2;
b) 烃基封端聚氧亚烷基单醇;以及
c) 如式所示的
羧酸:
R4(COOH)y
或其酸酐,其中 R4 代表具有约 2 至约 50 个碳原子的烃基,y 代表 1 至约 4 的整数。