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Development of Less Exothermic and Heat Resistance Chloroprene Rubber
Chloroprene rubber (CR) was developed in 1931 and has been widely used for industrial field applications ranging from transmission belts, conveyor belts, electric cables, hoses, and sponges, to adhesives, dipping goods and fiber treatments. Transmission belts occupy a major application for CR because of the processability and bonding properties of CR. Various efforts have been made in order to extend the product life of this application, particularly with regards to the development of a polymer which possesses less exothermic properties under dynamic service conditions and gives higher bonding strength. We have also improved heat resistance for applications requiring high temperature conditions. We have focused on the polymer terminal and the sulfur content in the polymer to develop improved CR which satisfies these requirements. In this presentation, we will introduce the details of the development.