The properties of rubber based on a combination of butadiene nitrile NBR 4045 and halobutyl CIIR and BIIR caoutchoucs

The influence of chlorinated butyl rubber (CIIR) and bromobutyl rubber (BIIR) in combination with nitrile butadiene rubber NBR 4045 on the rheometric characteristics of the rubber compound, physico-mechanical, performance and dynamic properties of rubber is examinated. Along with rubber, the rubber compound contained a vulcanizing agent (sulfur), vulcanization accelerators (2,2′-dibenzthiazole disulfide, diphenylguanidine), vulcanization activators (zinc white, stearic acid), stabilizer (naphtham-2), softeners (rosin, SMPlast resin, bitumen petroleum, industrial oil I-12A), fillers (carbon blacks P 514 and P 803, natural chalk, trans-polynorbornene) and other ingredients. It has been established that the nature of halobutyl rubbers in combination with NBR 4045 rubber has virtually no effect on the maximum and minimum torques, and BIIR promotes a higher rate of vulcanization of the rubber mixture. Vulcanizates containing combinations of NBR 4045 rubber with halobutyl rubbers are characterized by almost identical physical and mechanical properties and, after exposure to sea water, their masses change slightly. Vulcanizate based on a combination of rubbers NBR 4045: BIIR = 75:25 parts per hundred parts of rubber (phr) has the least changes in physical and mechanical properties in sea water and advanced dynamic properties.