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Application of Room Temperature Vulcanized Silicone Rubber


1. What are the classifications of silicone rubber?


Silicone rubber is a straight chain polysiloxane with high molecular weight which is more than 150000. Its structural form is similar to silicone oil. According to the different organic groups linked on the silicon atom, silicone rubber has many varieties, such as dimethyl silicone rubber, methyl vinyl silicone rubber, methyl phenyl silicone rubber, fluorosilicone rubber, nitrile silicone rubber, ethyl silicone rubber, phenylene silicone rubber and so on.


According to different vulcanization methods, silicone rubber can be divided into two kinds, in which one is by high-temperature vulcanization (thermal vulcanization) and the other is by room temperature vulcanization (including low-temperature vulcanization). No matter which type of it, there is no exothermic phenomenon during vulcanization. High temperature vulcanized silicone rubber is  polysiloxane with high molecular weight (generally 400000 ~ 800000), and room temperature vulcanized silicone rubber generally has low molecular weight (30000 ~ 60000).


2. What are the applications of room temperature vulcanized silicone rubber?


(1) Construction industry. It can be used for the bonding of glass and metal curtain wall, roof embedding, door and window sealing, and the bonding and sealing of various pools and ceramic tiles.

(2) Electronics industry. It can be used as encapsulation and pouring material for electronic and electrical components. Room temperature vulcanized silicone rubber can be moisture-proof, earthquake resistant, impact resistant and avoid sudden temperature change and chemical corrosion.

(3) Mold. Room temperature vulcanized silicone rubber is widely used in soft mold industry because of its excellent simulation and good demoulding performance.

(4) Automobile, ship and aviation. It can be used as cured-in-place gasket, window seal, electronic and electrical connector, anti corona, etc.


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