SULPHUR-MODIFIED CHLOROPRENE CAOUTCHOUC, MOULDED PRODUCTS THEREFROM AND METHOD FOR PRODUCTION THEREOF Russian patent published in 2016 - IPC C08C19/20 C08F36/18 C08J5/00 C08L11/00 

FIELD: chemistry.

SUBSTANCE: invention relates to sulphur-modified chloroprene caoutchouc, moulded products from thereof and method for thereof production. Sulphur-modified chloroprene caoutchouc, modified on polymer ends with compound, selected from tetramethylthiuramdisulphide, tetraalkylthiuramdisilphides with alkyl groups, which have from 2 to 7 carbon atoms, and salts of dialkyldithiocarbamic acid with alkyl groups, which have from 1 to 7 carbon atoms. Sulphur-modified chloroprene caoutchouc has peaks in ranges of chemical shift from 3.55 to 3.61 parts per million to 3.41 to 3.47 parts per million in ¹H-NMR spectrum, recorded for sample in deuterochloroform. Ratio (A/B) of peak area (A) in the range of chemical shift from 3.55 to 3.61 parts per million to area of peak (B) in range of chemical shift from 4.2 to 6.5 parts per million constitutes from 0.05/100 to 0.50/100. Extract of modified caoutchouc in azeotropic mixture of ethyl alcohol and toluene, as it is determined in standard JIS K 6229, has concentration from 3.0 wt % to 9.0 wt %.

EFFECT: invention makes it possible to reduce release of heat in sulphur-modified chloroprene caoutchouc.

6 cl, 1 dwg, 3 tbl, 1 ex