Patent ID: 8138130

Claim:
A composition prepared by reacting a mixture under reactive conditions wherein the mixture consists essentially of: (a) an alkyl or alkenylsuccinic acid derivative, wherein the alkyl or alkenyl substituent has an average molecular weight of from 450 to 5,000, and wherein the alkyl or alkenylsuccinic acid derivative is prepared by thermally reacting maleic anhydride with a polyalkylene in the presence of a strong acid; and (b) a diamino naphthyl compound of the formula wherein R 1 and R 2 are independently selected from the group consisting of hydrogen and C 1-10 alkyl; and R 3 is hydrogen, hydroxyl, C 1-6 alkyl or C 1-6 alkoxy; and wherein the molar ratio of (a) to (b) is from about 1:1.5 to about 1:3.