1. Nickel-based cis-1,4-polybutadiene rubber is prepared by the reaction of butyl rubber and nickel tetrahydro compound as catalysts. This kind of rubber has good chemical corrosion resistance and high temperature stability, and is a rubber material suitable for high temperature and chemical corrosion environment.

2. Rare earth cis-polybutadiene rubber is cis-polybutadiene rubber with rare earth elements as catalyst. This rubber has excellent heat resistance, good low-temperature elasticity and strong crack resistance, and is suitable for high-temperature and low-temperature environments.