METHOD FOR IMPROVING LUBRICATING OILS AND THE IMPROVED LUBRICATING OIL

摘要

A method for improving lubricating oils consisting of the steps of treating a lubricating oil with a monomer selected from the group consisting of vinyl chloride and mixtures of vinyl chloride with up to 30 percent by weight of another vinyl monomer selected from the group consisting of vinyl acetate and vinylidene chloride at a pressure of from 1 to 16 excess atmospheres and a temperature of from 10 DEG C to 150 DEG C in the presence of an oil-soluble free-radical-former for a time sufficient to obtain a polymer content of from 0.5 percent to 3 percent by weight based on the amount of the lubricating oil, and recovering said improved lubricating oil; as well as the improved lubricating oil having a content of 0.5 percent to 3 percent by weight of said polymer polymerized in situ.