PREPARATION OF A GRAFT - COPOLYMERIC COMPATIBILIZER USEFUL AS AN OIL ADDITIVE

摘要

A compatibilizer for stabilizing polymer blends of olefin copolymer and polymethacrylate oil additives is prepared by graft polymerizing hydrocarbon backbone polymer with alkyl methacrylate monomer, in the presence of a free radical initiator, at a temperature of from 60 DEG C to 175 DEG C. The compatibilizer so formed comprises a graft copolymer-containing solution having a polymer solids content of from 40 to 60 percent, a viscosity of at least 8 x 10<-><3>M<2>S<-><1> at 100 DEG C, and a weight percent conversion of alkyl methacrylate monomer to polymer of no less than 90%.