Patent ID: 8324139
Filing Date: 2012-12-04
Classification: C10M,C10N

Abstract:
1. A composition comprising the reaction product of: (a) a polyisobutylene-substituted succinimide dispersant prepared from (i) a 1500 to 2500 number average molecular weight polyisobutylene reacted with maleic anhydride and (ii) a polyethylene polyamine; (b) an aromatic amine comprising 4-aminodiphenylamine; and (c) an aldehyde; wherein the reaction mixture used to prepare the reaction product contains on an actives basis from 50 to 98 percent by weight of component (a), from 5 to 10 percent by weight of component (b), and from 2 to 5 percent by weight of component (c), where the reaction mixture optionally includes diluent oil.