Hot vulcanized silicone rubber is sold in the form of raw rubber or vulcanized rubber. It is generally formulated into rubber compounds with various characteristics for users to choose. According to different characteristics, it can be divided into the following categories:  

(1) Universal type (general strength type). It is composed of vinyl silicone rubber and reinforcing agent. The physical properties of vulcanizate are medium, and it is a kind of rubber compound with the largest amount and the strongest versatility.

(2) High strength type. Vinyl silicone rubber or low phenyl silicone rubber is used, fumed silica or modified silica with larger specific surface area is used as reinforcing agent, and appropriate processing aids and special additives are added to synthesize It can improve the cross-linking structure and improve the tear strength.

(3) High temperature resistant type. Using vinyl silicone rubber or low phenyl silicone rubber, the type of reinforcing agent and heat-resistant additives can be properly selected to obtain silicone rubber resistant to high temperature of 300-350 °C.

(4) Low temperature type. Using low phenyl silicone rubber, the brittleness temperature can reach -120℃, and it is still elastic at -90℃.

(5) Low compression set type. Vinyl silicone rubber is mainly used, and the organic peroxide specially used for vinyl is used as the vulcanizing agent. When the compression rate is 30%, the permanent deformation after compressing at 150 ° C for 24-72 hours is 7.0%-15% (common silicone rubber). 20% to 30%).

(6) Wire and cable type. The vinyl silicone rubber is mainly used, and the fumed silica with good electrical insulation performance is used as the reinforcing agent, which has good extrusion process performance.

(7) Oil and solvent resistant type. Ammonia silicone rubber is mainly used, which is generally divided into two categories: general-purpose type and high-strength type.

(8) Flame retardant type. The rubber compound composed of vinyl silicone rubber and adding halogen or platinum compounds as flame retardants has good flame resistance.

(9) Conductive type. Using vinyl silicone rubber, using acetylene carbon black or metal powder as filler, and selecting high temperature vulcanization or addition vulcanization method, silicone rubber with volume resistivity of 2.0-100Ω·cm can be obtained.

(10) Heat shrinkable type. The thermoplastic material with a certain melting temperature or softening temperature is added to the vinyl silicone rubber, and the thermal shrinkage rate of the silicone rubber compound can reach 35% to 50%.