| abstract |
(A) from 5 to 60% by weight of a repeating unit derived from a (meth) acrylate of formula I, wherein R represents hydrogen or methyl and R 1 represents an alkyl radical having 1 to 6 carbon atoms (B) from 5 to 80% by weight of repeating units derived from (meth) acrylates of formula (II), wherein R is hydrogen or methyl and R 2 is an alkyl radical having from 7 to 30 carbon atoms ), and (c) and 15 to 90% by weight, (wherein the repeat units derived from (meth) acrylate of formula III R is hydrogen or methyl, n is an integer ranging from 2 to 500, a is C 2 and -C 4 alkylene, R 3 relates to a (meth) acrylate polymer to improve, viscosity index containing alkyl radical Im) having a hydrogen atom or 1 to 4 carbon atoms. The present invention also relates to a novel lubricating oil composition, a process for preparing the above-mentioned (meth) acrylate polymer, and its use in improving the viscosity index of a lubricating oil composition comprising one or more polar base oils. |