Patent ID: 6733551
Filing Date: 2004-05-11
Classification: C10L,C10M

Abstract:
A method of improving the compatibility of a fuel additive composition, said method comprising blending together the following components:a) a Mannich condensation product of (1) a high molecular weight alkyl-substituted hydroxyaromatic compound wherein the alkyl group has a number average molecular weight of from about 300 to about 5,000 (2) an amine having the formula: â€ƒwherein 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 â€”CR2R3â€” unit, and x is an integer from 1 to about 6; â€ƒand (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 having an average molecular weight of about 500 to about 5,000, wherein the oxyalkylene group is a C2 to C5 oxyalkylene group and the hydrocarbyl group is a C1 to C30 hydrocarbyl group; c) a carboxylic acid as represented by the formula: R4(COOH)y â€ƒwherein R4 represents a hydrocarbyl group having about 2 to about 50 carbon atoms, and y represents an integer of 1 to about 4; and d) an anhydride selected from the group consisting of succinic, glutaric, phthalic, and alkyl anhydrides.