The vulcanization reaction of one-component room temperature vulcanized silicone rubber is initiated by moisture in the air. The commonly used cross-linking agent is methyl triacetoxy silane. Its Si-OC bond is easily hydrolyzed. The acetoxy group combines with the hydrogen group in the water to form acetic acid, and the hydroxyl group in the water is moved to the original acetoxy group. In position, it becomes trihydroxymethylsilane. Trihydroxymethylsilane is extremely unstable and easily condenses with linear silicones whose end groups are hydroxyl groups to form a cross-chain structure. Usually, the raw silicone rubber containing silanol end groups and various compounding agents such as fillers, catalysts, cross-linking agents, etc. are packed into a sealed hose, and it is squeezed out of the container during use and vulcanized by the moisture in the air. Elastomers, at the same time emit low-molecular-weight substances.


In addition to methyltriacetoxysilane, the "crosslinking agent" can also be a silane containing an alkoxy group, an oxime group, an amino group, an amide group, or a ketone group. When it is cross-linked with an alkoxy group, it releases alcohol, which is called dealcoholization type one-component room temperature vulcanization silicone rubber. When it is cross-linked with oxime group, it generates oxime, which is called deoxime-type room temperature vulcanization silicone rubber. Depending on the agent, one-component room temperature vulcanized silicone rubber can be deacidified, deoximated, dealcoholized, deamined, deamidated, and deketone, but the deacidified type is currently the most widely used One kind.


　　 The vulcanization time of one-component room temperature vulcanized silicone rubber depends on the vulcanization system, temperature, humidity and thickness of the silicone rubber layer. Increasing the temperature and humidity of the environment can speed up the vulcanization process. Under typical environmental conditions, generally after 15 to 30 minutes, the surface of the silicone rubber may not be sticky, and the 0.3 cm thick glue layer can be cured within a day. The depth and strength of curing will gradually increase in about three weeks.


　　 one-component room temperature vulcanized silicone rubber has excellent electrical properties and chemical inertness, as well as heat resistance, natural aging resistance, flame resistance, moisture resistance, air permeability and other properties. They can maintain long-term elasticity in the range of -60～200℃. It does not absorb or emit heat during curing, has a small shrinkage rate after curing, and has good adhesion to materials. Therefore, it is mainly used as an adhesive and sealant. Other applications include in-situ gaskets, protective coatings and caulking materials.


       Many formulations of one-component silicone rubber adhesives show automatic bonding performance to a variety of materials such as most metals, glass, ceramics and concrete. For example, the shear strength of bare aluminum can reach 200 pounds per inch. 2. The tearing strength can reach 20 pounds·foot/inch2 (0.35 Joules/cm2). When bonding is difficult, a primer can be applied to the substrate to improve the bonding strength. The primer can be a reactive silane monomer or resin. When they are cured on the substrate, a layer of modified suitable On the surface of silicone bonding.


Although 　　 one-component room temperature vulcanized silicone rubber is convenient to use, its vulcanization depends on the moisture in the atmosphere, which limits the thickness of the vulcanized rubber, and can only be used where the thickness is less than 6 mm.


　　 The vulcanization reaction of one-component room temperature vulcanized silicone rubber is gradually carried out from the surface to the depth. The thicker the rubber layer, the slower the curing. When the deep part needs to be cured quickly, the layered pouring and gradual vulcanization method can be used, and some rubber materials can be added each time, and then the material can be added after vulcanization, which can reduce the total vulcanization time. Adding magnesium oxide can accelerate the vulcanization of the deep layer glue.


　　The vulcanization reaction of one-component room temperature vulcanized silicone rubber is vulcanized into an elastomer by reacting with moisture in the air. With the difference of chain agent, single-component room temperature vulcanized silicone rubber can be of many varieties such as deacidification type, deoxime type, dealcoholization type, deamination type, deamidation type and deketone type. The vulcanization time of one-component room temperature vulcanized silicone rubber depends on the vulcanization system, temperature, humidity and thickness of the silicone rubber layer. Increasing the temperature and humidity of the environment can speed up the vulcanization process. Under typical environmental conditions, generally after 15 to 30 minutes, the surface of the silicone rubber may not be sticky, and the 0.3 cm thick adhesive layer can be cured within a day. The depth and strength of curing will gradually increase in about three weeks.