APPLICATION OF POLYMERS, WHICH CONTAIN ESTER GROUPS, AS ANTIFATIGUE ADDITIVES Russian patent published in 2014 - IPC C10M145/14 C10M149/02 C08F220/10 

FIELD: chemistry.

SUBSTANCE: invention relates to application of polymers, which contain ester groups, as antifatigue additives. Described is application of ester group-containing polymers with, at least, one non-polar segment P, characterised by the fact that it is obtained by polymerisation of monomer composition, which includes a) from 0 to 40 wt %, counted per the weight of monomer mixture for obtaining non-polar segments, one or several ethylene-unsaturated esters of formula (I), in which R stands for hydrogen or methyl, R¹ stands for non-branched or branched alkyl residue with 1-6 carbon atoms, R² and R³ stand for hydrogen, b) from 5 to 100 wt %, counted per the weight of monomer mixture for obtaining non-polar segments, of one or several ethylene-unsaturated esters of formula (II), in which R stands for hydrogen or methyl, R⁴ stands for non-branched or branched alkyl residue with 7-15 carbon atoms, R⁵ and R⁶ stand for hydrogen, c) from 0 to 80 wt %, counted per the weight of monomer mixture for obtaining non-polar segments, of one or several ethylene-unsaturated esters of formula (III), in which R stands for hydrogen or methyl, R⁷ stands for non-branched or branched alkyl residue with 16-30 carbon atoms, R⁸ and R⁹ stand for hydrogen, and d) from 0 to 50 wt %, counted per the weight of monomer mixture for obtaining non-polar segments, of comonomer, and at least one polar segment D, containing at least eight repeated units, and content of dispersing repeated units in segment D constitutes at least 30 wt %, counted per the weight of segment D, with dispersing repeated units being derivatives of one or several ethylene-unsaturated polar esters of formula (IV), in which R stands for hydrogen or methyl, X stands for oxygen, sulphur or aminogroup of formula -NH- or -NR^a-, in which R^a stands for alkyl residue with 1-40 carbon atoms, R¹⁰ stands for residue with 2-20 carbon atoms and at least one heteroatom, R¹¹ and R¹² group of formula respectively independently on each other stand for hydrogen or -COX'R¹⁰', in which X' stands for oxygen or aminogroup of formula -NH- or -NR^a'-, in which R^a' stands for alkyl residue with 1-40 carbon atoms, and R¹⁰' stands for residue with 1-100 carbon atoms, and/or derivatives of heterocyclic vinyl compounds, as antifatigue additive in lubricating materials.

EFFECT: obtaining antifatigue additive, ensuring reduction of fatigue chipping to minimum.

20 cl, 3 tbl, 5 ex