| abstract |
A fuel additive composition comprising:n a) a Mannich condensation product of (1) a high molecular weightnalkyl-substituted hydroxyaromatic compound; (2) an aminenhaving the formula:n nwherein A is CH or nitrogen, R 1 , R 2 , R 3 are independentlynhydrogen or lower alkyl of 1 to about 6 carbon atoms and eachnR 2 and R 3 is independently selected in each -CR 2 R 3 - unit, and xnis an integer from 1 to about 6; nand (3) an aldehyde, wherein the respective molar ratio ofnreactants (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:n R 4 (COOH) y nor anhydride thereof, wherein R 4 represents a hydrocarbyl groupnhaving about 2 to about 50 carbon atoms, and y represents anninteger of 1 to about 4. |