Room temperature vulcanized silicone rubber ：Room temperature vulcanized silicone rubber generally includes condensation type and addition molding two categories. The additive room temperature adhesive is a linear polysiloxane with vinyl as the base adhesive, using hydrogen-containing siloxane as the crosslinking agent, and becomes an elastomer at room temperature to medium temperature in the presence of catalyst. It has good heat resistance, hydrophobicity and electrical insulation. At the same time, due to the introduction of active end group, it has excellent physical and mechanical properties, especially in tensile strength, relative elongation and tearing strength. It is suitable for a variety of vulcanization methods, such as radiation vulcanization, peroxide vulcanization and molding vulcanization, widely used in heat resistance, moisture resistance, electrical insulation, high strength silicone rubber products and so on.
  Condensed room temperature vulcanized silicone rubber is characterized by the condensation reaction between silicon hydroxyl group and other active substances, and can be cross-linked to become an elastomer silicone rubber at room temperature. The product is divided into two forms of single-component packaging and two-component packaging. Single component room temperature vulcanized silicone rubber (RTV-1 adhesive for short) is one of the main products of condensed liquid silicone rubber. It is usually composed of basic polymers, crosslinking agents, catalysts, fillers and additives. The product is packaged in a sealed hose, extruded when used, and can be vulcanized into an elastomer after contact with air, which is extremely convenient to use. Vulcanized rubber can be used in the temperature range of (-60 ~ +200℃) for a long time, with excellent electrical insulation properties and chemical stability, water resistance, ozone resistance, climate aging resistance, and good adhesion to a variety of metal and non-metallic materials. It is mainly used for coating various electronic components and electrical equipment, and the sealing material plays the role of insulation, moisture-proof and shock-proof. As a surface protection material for semiconductor devices; It can also be used as sealing interstitial material and elastic adhesive.
  Two-component room temperature vulcanized silicone rubber (referred to as RTV-2 adhesive) is not convenient to use RTV-1 adhesive, but the proportion of its components is varied, a variety of vulcanized products can be obtained with a variety of specifications and properties, and can also be deeply vulcanized. Therefore, it is widely used in electronic appliances, automobiles, machinery, construction, textile, chemical, light industry, printing and other industries for insulation, packaging, caulking, sealing, moisture-proof, seismic and roller production materials. In addition, because RTV-2 has excellent demoulding property, it is widely used as a soft mold material for the reproduction and manufacturing of cultural relics, crafts, toys, electronic appliances, mechanical parts, etc.
  One of the typical applications of silicone sealants is glass curtain walls. The glass and aluminum alloy frame are bonded with silicone structural adhesive as the external wall material, and the expansion joint is waterproof and sealed with silicone weather resistant adhesive. Other applications include sealing around aluminum alloy doors and Windows and plastic steel doors and Windows, sealing of glass installation and moving slots, rivets and fixing screws: waterproof sealing between kitchen, bathroom, toilet sanitary ware and countertops, walls and furniture; Aquarium, ceiling, metal roof, window, counter, wall panel, color steel seal; It is used for waterproof caulking sealing between plates of high grade highway. In addition to building sealant, RTV also includes sealing materials for aerospace, nuclear power plants, electronics, machinery, automotive and other industries, silicone potting materials for electronic components, silicone mold adhesives used as soft mold materials, etc. The demand for these varieties is relatively small, but it is indispensable in many occasions.