Inventors:
Robert L. Stambaugh - Hatboro PA
Richard A. Galluccio - Perkasie PA
Assignee:
Rohm and Haas Company - Philadelphia PA
International Classification:
C10M 132
C10M 326
C10L 114
C08L 2300
Abstract:
Graft copolymers wherein the backbone polymer is a rubbery, oil soluble ethylene-propylene copolymer or ethylene-propylene diene modified terpolymer and the graft monomer is a C-vinylpyridine or N-vinylpyrrolidone impart dispersant properties to hydrocarbon fuels and combined viscosity index improvement and dispersant properties to lubricating oils for internal combustion engines. The graft copolymers are prepared by intimate admixture of backbone polymer, graft monomer and free radical initiator at a temperature below initiation temperature, followed by a temperature increase to or above initiation temperature, thus providing a product containing little or no byproduct.