Flow improvers for crude and residual-containing fuel oils

摘要

Copolymers of a 1,2 epoxy alkane and a cyclic carboxylate compound of the class consisting of dicarboxylic acid anhydrides, preferably maleic anhydride or a hydrocarbyl substituted succinic anhydride and a beta lactone, said copolymers having C10 to C50, preferably C20 to C40, linear, pendant hydrocarbon chains are flow improvers in residual and crude oils.