FIELD: rubber industry.
SUBSTANCE: invention concerns a method for grafting polymers based on conjugated diene monomers to brominated butyl rubbers and using thus obtained grafted copolymers in rubber compositions, which, after vulcanization, acquire improved physical characteristics. Grafting procedure comprises mixing solid brominated butyl rubber with solid polymers based on conjugated diene monomer including some quantity of bonds C-S-(S)n-C with n being an integer equal from 1 to 7. Mixing is conducted at temperature above 50 over a period of time long enough to complete the grafting. Rubber composition containing above grafted polymer optionally includes one or more curing agents. Cured rubber composition is intended for manufacturing tracks.
EFFECT: increased shock-absorbing capacity of products.
14 cl, 5 dwg, 5 tbl, 3 ex
