What Is A One-Component Room Temperature Vulcanized Silicone Rubber

- Jul 12, 2019-


The vulcanization reaction of the one-component room temperature vulcanized silicone rubber is vulcanized into an elastomer by acting on moisture in the air. The single-component room temperature vulcanized silicone rubber may be of various types such as deacidification type, depurination type, dealcoholization type, deamination type, deamidation type and deketone type, depending on the chain agent.

Multifunctional-Heat-resistant-Silicone-Cooking-Oil-Bottle (1)

The vulcanization time of the 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 accelerate the vulcanization process. Under typical environmental conditions, after 15 to 30 minutes, the surface of the silicone rubber may be non-tacky, and a layer of 0.3 cm thick may be cured within one day. The depth and strength of curing will gradually increase in about three weeks. The 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, and gas permeability. They maintain flexibility over a long period of time from -60 to 200 °C. It does not absorb heat when it is cured, does not release heat, has a small shrinkage after curing, and has good adhesion to materials. Therefore, it is mainly used as an adhesive and sealant, and other applications include in-situ molded gaskets, protective coatings and caulking materials. Many single-component silicone rubber adhesive formulations exhibit automatic bonding properties to a variety of materials such as most metals, glass, ceramics and coagulation. When the bonding is difficult, the substrate may be primed to improve the bonding strength. The primer may be a reactive silane monomer or resin. When they are cured on the substrate, a modified layer is formed. Silicone bonded surface. Although the one-component room temperature vulcanized silicone rubber is convenient to use, since the vulcanization is based on the moisture in the lazy atmosphere, the thickness of the vulcanized rubber is limited, and it can only be used in applications requiring a thickness of 6 mm or less. The vulcanization reaction of the one-component room temperature vulcanized silicone rubber is carried out gradually from the surface to the depth, and the thicker the rubber layer, the slower the curing. When the deep part is also to be solidified quickly, the layered watering stepwise vulcanization method can be used, and some rubber can be added each time, and then the vulcanization is added, which can reduce the total vulcanization time. The addition of magnesium oxide accelerates the vulcanization of the deep glue.