HTV Silicone Rubber Production Precautions | JCT Machinery

1. Cooperate

The compounding agents of htv silicone rubber mainly include reinforcing agents, vulcanizing agents and some special additives. Generally, only 5 to 6 components are needed to form a practical formula.

2. Formula design should consider the following points

(1) Silicone rubber is a raw rubber with a high degree of saturation. It usually cannot be vulcanized with sulfur. Organic peroxide should be used as the vulcanizing agent. Therefore, the rubber compound must not contain active substances that can interact with the decomposition products of peroxide, otherwise it will affect vulcanization.

(2) Silicone rubber products are generally used at high temperatures, and their compounding agents should remain stable at high temperatures. Inorganic oxides are usually used as reinforcing agents.

(3) Silicone rubber can easily cause the cleavage and rearrangement of siloxane bonds under the action of chemical reagents such as trace amounts of acid or alkali, resulting in a reduction in the heat resistance of silicone rubber. Therefore, when selecting compounding agents, the acidity and alkalinity of he perocide decomposition products must be considered to avoid affecting the performance of the vulcanized rubber.