POLYALKYL(METH)ACRYLATE FOR IMPROVING PROPERTIES LUBRICATING OIL Russian patent published in 2016 - IPC C08F265/04 C08F220/10 C08F8/32 C10M149/02 

FIELD: chemistry.

SUBSTANCE: present invention relates to polyalkyl (meth) acrylate for improving the properties of lubricating oils. Describes a polyalkyl (meth) acrylate for improving the properties of lubricating oils containing repeating units derived from (meth) acrylates with 6-22 carbon atoms in the alcohol radical, characterized in that the polyalkyl (meth) acrylate, a graft copolymer, wherein the graft base comprises repeating units derived from (meth) acrylates, comprising: a) from 0 to 40 wt.% of the repeating units are derived from (meth) acrylates of formula (I):

wherein R is hydrogen or methyl, a R¹ It means an alkyl radical having 1-5 carbon atoms, b) from 20 to 99.9 wt.% of the repeating units are derived from (meth) acrylates of formula (II):

wherein R is hydrogen or methyl, a R² It means an alkyl radical having 6-22 carbon atoms, c) from 0 to 20 wt.% of the repeating units are derived from (meth) acrylates of formula (III):

wherein R is hydrogen or methyl, a R³ an alkyl radical of 23-4,000, and a graft component comprises from 0.1 to 10 wt.% of the repeating units are amine derivatives of the polar ethylenically unsaturated monomer which is maleic acid or maleic anhydride and amine is an N-phenyl-1,4 -phenylendiamin. Also disclosed is a method for producing the above polyalkyl (meth) acrylate to form the basis for the above graft polymerizing (meth) acrylate, which then is grafted polar ethylenically unsaturated monomers, and polymer modified N-phenyl-1,4-phenylene polymer-analogous reaction. Discloses a lubricant composition comprising the above polyalkyl (meth) acrylate, and the use of the above described polyalkyl (meth) acrylate to reduce friction.

EFFECT: technical result - getting supplements with high viscosity index and improved friction lubricant, reducing the formation of gray staining or pitting.

9 cl, 1 dwg, 6 tbl, 13 ex