ALKALINE EARTH METAL SALT DISPERSIONS IN ACRYLIC POLYMERS

摘要

This invention relates to colloidal dispersions of an alkaline earth metal salt in an oil-soluble acrylic polymer which is polymerized from a monomer system of at least one alkyl or hetero-substituted alkyl ester of an acrylic monomer selected from the group consisting of methacrylates and acrylates represented by the formula: (I) wherein R1 is a -CH3 or -H radical and R2 is selected from the group consisting of Cl-30 alkyl and heterosubstituted alkyl radicals. This invention also relates to colloidal dispersions as described hereinabove wherein the monomer system further includes at least one nonacrylic polymerizable ethylenically unsaturated nitrogencontaining compound. Preferred polymerizable ethylenically unsaturated nitrogen-containing compounds are those selected from the group consisting of 2- and 4vinylpyridines and N-vinyl-2-pyrrolidinones. Further, this invention relates to finished lubrication oil compositions wherein the metal salt-polymer dispersions are incorporated into lubricating oil compositions, either alone or in combination with other oil additives, whereby the metal salt-polymer colloidal dispersions impart improved properties to the finished lubricating oil compositions.