APPLICATION OF COMB POLYMERS AS ANTI-FATIGUE ADDITIVES Russian patent published in 2015 - IPC C10M145/02 C10M145/10 C10M145/14 C08F290/04 C08F255/00 C08F279/00 

FIELD: chemistry.

SUBSTANCE: claimed invention relates to comb polymers and their application as anti-fatigue additives to lubricating oils. Described is the application of the comb polymers, containing in the main chain repeating units, representing derivatives of macromonomers with the molecular weight of at least 500 g/mol based on alkenes with 2-10 carbon atoms and/or alkadienes with 4-10 carbon atoms, and repeating units, representing derivatives of low molecular monomers with the molecular weight lower than 500 g/mol, selected from the group, including alkyl(meth)acrylates with 1-30 carbon atoms in an alcohol residue, alkylstyrene monomers with 8-17 carbon atoms, vinyl esters with 1-11 carbon atoms in an acyl group, vinyl ethers with 1-30 carbon atoms in an alcohol residue, (di)alkylfumarates with 1-30 carbon atoms in an alcohol residue and (di)alkylmaleates with 1-30 carbon atoms in an alcohol residue, as anti-fatigue additives in lubricating materials, representing transmission oil, motor oil or hydraulic oil. Also described is the comb polymer, which contains in the main chain the repeating units, representing the derivatives of the macromonomers with the molecular weight of at least 500 g/mol based on the alkenes with 2-10 carbon atoms and/or alkadienes with 4-10 carbon atoms, and the repeating units, representing the derivatives of the low molecular monomers with the molecular weight lower than 500 g/mol, which are the derivatives of alkyl(meth)acrylates with 8-30 carbon atoms in an alcohol residue, and possesses the polarity by tetrahydrofuran, constituting at least 50%, and characteristic viscosity from 15 to 50 ml/g. Described is the comb polymer, containing in the main chain the repeating units of the macromonomers, representing the derivatives of the macromonomers based on the alkenes with 2-10 carbon atoms and/or alkadienes with 4-10 carbon atoms, with the molecular weight of at least 500 g/mol, and at least 10 wt % of the repeating units, representing the derivatives of low molecular monomers with the molecular weight lower than 500 g/mol, containing as the low molecular monomers derivatives of alkylstyrene monomers with 8-17 carbon atoms, and at least 5 wt % of the repeating units, representing the derivatives of alkyl(meth)acrylates with 1-6 carbon atoms, and possessing the polarity by tetrahydrofuran, constituting at least 30%. Also described is a method of obtaining the said comb polymers, in accordance with which the macromonomers are copolymerised with the low molecular monomers. The composition of lubricating oil, containing the said comb polymers is described.

EFFECT: obtaining compounds, suitable as anti-fatigue additives to lubricating oils, which are not accompanied by the increase of the lubricating material viscosity.

28 cl, 3 tbl, 5 ex