Two-component condensation type room temperature vulcanization silicone rubber is the most common type of room temperature vulcanization silicone rubber. The raw rubber is usually a hydroxyl-terminated polysiloxane, which is combined with other compounding agents and catalysts to form a rubber compound.

　　 The vulcanization reaction of two-component room temperature vulcanized silicone rubber is not triggered by the moisture in the air, but by the catalyst. Usually the raw silicone rubber, filler, and cross-linking agent are packaged as one component, and the catalyst is packaged as another component alone, or other combinations are used, but the catalyst and the cross-linking agent must be packaged separately. Regardless of the packaging method used, curing only begins when the two components are completely mixed together. The commonly used cross-linking agent is ethyl orthosilicate, and the catalyst is dibutyl tin dilaurate. And add appropriate fillers and additives according to the required properties of the final product. In recent years, because dibutyltin dilaurate is a medium-toxic substance in many countries, the addition of dibutyltin in food bags and blood plasma bags is prohibited, and it has basically been replaced by low-toxic octyltin.

　　 The vulcanization time of 　　 two-component condensation type room temperature vulcanization silicone rubber mainly depends on the type, amount and temperature of the catalyst. The more the amount of catalyst, the faster the vulcanization, and the shorter the shelf time. At room temperature, the shelf time is generally a few hours. If you want to extend the shelf time of the rubber compound, you can use the cooling method. It takes about one day for the two-component condensation type room temperature vulcanized silicon rafter rubber to fully cure at room temperature, but it only takes 1 hour at a temperature of 150°C. By using the accelerator γ-aminopropyltriethoxysilane for synergistic effect, the curing speed can be significantly improved.

　　 The vulcanization reaction of two-component room temperature vulcanized silicone rubber is not triggered by moisture in the air, but by a catalyst. Usually the rubber and catalyst are packaged as one component separately. Only when the two components are completely mixed together does curing begin to occur. The vulcanization time of two-component condensation type room temperature vulcanized silicone rubber mainly depends on the type, amount and temperature of the catalyst. The more the amount of catalyst, the faster the vulcanization, and the shorter the shelf time. At room temperature, the shelf time is generally a few hours. If you want to extend the shelf time of the rubber compound, you can use the cooling method. It takes about one day for the two-component condensation type room temperature vulcanized silicon rafter rubber to fully cure at room temperature, but it only takes 1 hour at a temperature of 150°C. Through the use of accelerators for synergistic effects, the curing speed can be significantly increased.

　　 Two-component room temperature vulcanized silicone rubber can maintain long-term elasticity in the temperature range of 65~250℃, and has excellent electrical properties and chemical stability, resistance to water, ozone, and weathering. In addition, it is simple to use and has strong process applicability. Therefore, it is widely used as potting and molding materials. After various electronic and electrical components are coated and potted with room temperature vulcanized silicone rubber, they can protect against moisture (corrosion, shock, etc.). It can improve performance and stabilize parameters.

       Two-component room temperature vulcanized silicone rubber is particularly suitable for deep potting materials and has a faster vulcanization time, which is superior to single-component room temperature vulcanized silicone rubber. Two-component room temperature vulcanized silicone rubber has excellent anti-sticking performance after vulcanization, and the shrinkage rate is very small during vulcanization. Therefore, it is suitable for making soft molds for casting epoxy resin, polyester resin, polystyrene, Molds for polyurethane, vinyl, paraffin wax, low melting point alloys, etc.

       In addition, the high simulation performance of two-component room temperature vulcanized silicone rubber can replicate various exquisite patterns on cultural relics. Pay attention to the use of two-component room temperature vulcanized silicone rubber: first weigh the rubber and catalyst separately, and then mix them in proportion. The mixing process should be carefully operated to minimize the amount of entrapped gas. After the rubber material is uniformly mixed (uniform color), the bubbles can be removed by standing or decompression (vacuum 700 mmHg). After all the bubbles are discharged, they can be vulcanized into silicon after being placed at room temperature or at a specified temperature for a certain period of time rubber.