Dimethyl silicone rubber

Dimethyl silicone rubber is one of the earliest commercial production of silicone rubber, can be in the range of -60 ~ 200℃ to maintain good elasticity, good aging resistance, excellent electrical insulation performance and moisture-proof, shockproof and physiological inertia characteristics. Dimethyl silicone rubber is mainly used for fabric coating, can also be made into a variety of extrusion and calendering products used in electromechanical, aviation, automobile and medical industries. But because of the dimethyl silicone rubber vulcanization activity is low, used for the manufacture of thick products, vulcanization is difficult, the inner layer is easy to bubble and high temperature compression permanent deformation, so it has been replaced by methyl vinyl silicone rubber.

Methyl vinyl silicone rubber

Due to the introduction of a small amount of vinyl in the macromolecular structure of silicone rubber can greatly improve the vulcanization performance of silicone rubber, so in the current application of silicone rubber, mostly contain vinyl. Methyl vinyl silicone rubber is one of the most versatile silicone rubber, currently in the production of silicone rubber at home and abroad in the dominant position. Because it has unsaturated vinyl on the side chain, its machinability and physical and mechanical properties are better than that of the two base silicone rubber. In addition to the general characteristics of dimethyl silicone rubber, it also has a wide range of temperature, can be in a range of 60 ~ 260℃ to maintain good elasticity, it is easier to vulcanize than dimethyl silicone rubber, has a small compression permanent deformation, good solvent resistance expansion and high pressure steam resistance stability and excellent cold resistance, etc. And because of the use of low activity of peroxide vulcanization, so as to reduce the vulcanization bubbles and poor rubber stability. Therefore, the general use of methyl vinyl silicone rubber can be made of larger thickness of products. Methyl vinyl silicone rubber is the most widely used in silicone rubber varieties, have sprung up in recent years, a variety of high performance and special purpose of silicon rubber, they are mostly based on vinyl silicone rubber, silicone rubber, such as high intensity at the low compression set of silicone rubber, don't need after vulcanization silicone rubber, thermal conductive silicone rubber, silicone and so on. Methyl vinyl silicone rubber in the aviation industry, widely used as gaskets, sealing materials and fragile, shockproof parts of the protective layer; In the electrical industry can be used as advanced insulating materials such as electronic components, dynamic sealing ring of high temperature potentiometer, sealing ring of underground long-distance communication equipment; In medicine, because of the small physiological reaction of methyl vinyl silicone rubber to the human body, it is used as a plastic surgery, artificial heart valve, blood vessels and so on.