DISPERSANT/ANTIOXIDANT VII LUBRICANT ADDITIVE

摘要

A DISPERSANT/ANTIOXIDATE VII LUBRICANT ADDITIVE (D#Y79,243-F) A dispersant/antioxidant bound VII polymethacrylate lubricant additive composition prepared by: (a) combining a polyunsaturated monomer with (C1C20) alkyl monomers and, optionally, a dispersant monomer in an oil solvent to provide an intermediate reaction mixture; (b) stirring and purging the reaction mixture; (c) heating the purged mixture and adding a radical polymerization catalyst to the purged mixture; (d) heating the mixture to a sufficiently high temperature to remove any excess of the polymerization catalyst therefrom; (e) (optionally) recovering the intermediate product polymethacrylate; (f) combining the intermediate product with an aromatic nitroso compound to provide an intermediate reaction mixture; (g) stirring and purging the intermediate reaction mixture; and (h) recovering from the purged mixture the product polymethacrylate. VAM79243.pa