COMB TYPE POLYMERS AND ITS USE, ADDITIVE COMPOSITION AND ITS USE, LUBRICANT OIL COMPOSITION AND PROCESS TO PREPARE COMB TYPE POLYMERS

摘要

The present invention is directed to polyalkyl (meth) acrylate based comb-like polymers with weight average molecular weights of 700,000 g / mol or greater and weight average molecular weights of 130,000 g / mol or greater, their preparation, lubricating compositions comprising such comb-type polymers and their use to improve the high shear and high temperature performance of lubricating compositions, especially engine oil (eo) compositions.