The main raw materials of HCR (High Consistency Rubber) silicone rubber are silicone rubber base materials and silicone rubber additives. The following are common raw materials for silicone rubber:

Dimethyl polysiloxane (dimethyl silicone oil): This is the main base material of silicone rubber, also known as the base polymer. It is a polymer chain connected by silicon oxygen bonds, with highly cross-linked properties.

Silane coupling agent: used to promote the bonding performance of silicone rubber with other materials, such as bonding with metals or plastics. Common silane coupling agents include vinyl trimethoxysilane (VMTMS), vinyl trimethylsilane (VTMS), etc.

Catalyst: used to promote the crosslinking reaction of silicone rubber, forming a network structure with elasticity and heat resistance. Commonly used catalysts include peroxides (such as diphenyldiisopropyl peroxide) and platinum catalysts (such as platinum chloride).

Filler: used to improve the mechanical properties, flowability, and cost-effectiveness of silicone rubber. Common fillers include silica (white carbon black), carbon black, and silicates.

Stabilizer: used to improve the heat resistance and aging resistance of silicone rubber. Stabilizers can resist oxidation, light, and the influence of chemicals, extending the service life of silicone rubber.

Lubricant: used to improve the processing performance of silicone rubber, reduce friction coefficient, reduce adhesion and viscosity. Common lubricants include silicone oil and fatty acid esters.

The proportions and usage methods of these raw materials may vary depending on the specific requirements and application fields of silicone rubber products.