The influence of brombutyl and divinylstyrene caoutchoucs, sevilen on the properties of seawater-resistant rubber

The effect of bromobutyl caoutchouc BBK-232, sevilene 11 808−340, divinylstyrene caoutchoucs DSSK-628V and SKMS-30ARK on the rheometric characteristics of the rubber mixture, physical, mechanical, operational and dynamic properties of rubber used for the manufacture of seawater-resistant products are studied. Along with the listed ingredients, the rubber mixture contained a vulcanizing agent — sulfur; vulcanization accelerators — 2,2'-dibenzothiazole disulfide, diphenylguanidine; vulcanization activators — zinc white, stearin; antioxidant — naphtham-2; fillers — technical carbons P 514 and P 803, natural chalk; polymer filler — trans-polynorbornene; softeners — rosin, petroleum polymer resin «Shinplast», factice; plasticizer — petroleum bitumen. It was found that rubber based on DSSK-628V and BBK-232 couutchoucs with their mass ratio of 75:25 not containing sevilen 11 808−340 has better rheometric, physical-mechanical, dynamic properties and resistance to sea water.