FIELD: chemistry.
SUBSTANCE: claimed invention relates to polyalkylmethacrylate copolymers. Described is polyalkylmethacrylate copolymer for lowering pour point of mineral oil composition, which includes derivatised links of: (A) from 60.0 to 96.0 wt % of C12-C16alkylmethakrylate and (B) from 40.0 to 4.0 wt % of C18-C30alkylmethacrylate, component (B) including from 40 to 50 wt % of C18alkylmethacrylate, from 5 to 15 wt % of C20alkylmethacrylate and from 40 to 50 wt % of C22alkylmethacrylate counted per total weight of component (B). Also described is lubricating composition, which includes: (I) oil of lubricating viscosity; (II) said polyacrylmethacrylate copolymer and optionally (III) other additives.
EFFECT: improvement of low-temperature properties of lubricating compositions.
9 cl, 3 tbl, 3 ex
