Rubber expansion joint inner layer rubber choice is based on natural rubber and styrene-butadiene rubber, or use natural rubber, styrene-butadiene rubber, paraben rubber and use; can also use rubber-plastic blend, and can use the appropriate amount of recycled rubber.
Reinforcement filling system: reinforcing agent can be high wear-resistant carbon black, semi-reinforcing carbon black, general carbon black and use, usually the comprehensive performance of the two together is better.
The vulcanization system usually adopts the traditional vulcanization system of sulfur yellow and accelerator. The amount of sulfur yellow is 1.5~2.5 parts, and the promoter is better with thiazoles and sulfonamides. Softeners: petroleum-based softeners such as heavy oil, motor oil, pine tar and solid softeners such as asphalt and petroleum resin are used, which is more effective. Rubber soft joint protection system Amine antioxidant such as antioxidant A is appropriate.
