The silicone rubber polymer is a chain structure composed of Si-O bonds, and its main component is a linear polysiloxane. The Si-O-Si bond is the main chain of its structure, which spirals to cancel the polarity of the silicon-oxygen bonds, and the side chains are generally low-polar or non-polar groups, so the polarity of the entire macromolecule is very low. The silicone rubber exhibits hydrophobicity, oxidation resistance and aging resistance. In addition, the Si-O bond in the main chain and the Si-C bond in the side chain are similar to the ionic bond, and do not undergo cracking, oxidation, etc. at normal use temperatures (below 250 ° C), so they have excellent resistance. Heat, can be used as medical devices, artificial organs and drug delivery systems, and has good biocompatibility to the human body. Due to the small intermolecular force of silicone rubber, its film has better gas permeability than ordinary rubber and plastic waxing film, and has strong selectivity to different air permeability, such as gas exchange film medical supplies and artificial organs in vivo. Wait.

 The design, production and sales of medical silicone rubber products are basically the same as ordinary silicone rubber products, but the requirements for materials, manufacturing processes, processing equipment, production environment and product packaging are much higher than ordinary products. The silicone rubber products in the body are used for the body, and the formula is simple to be used. The auxiliary materials which are not added are not added as much as possible, and the various matching materials are required to be pure, and it is strictly forbidden to add toxic substances. The main reinforcing agent commonly used is white carbon black, and the vulcanizing agent is generally a peroxide such as 2,4-dichloroperoxybenzene (DCBP) and 2,5-dimethyl-2,5-di-tert-butyl. In order to facilitate the operation and prevent the tendency of structuring during the processing of oxidized hexane (DBPMH), a small amount of processing aids such as hydroxy silicone oil and alkoxysilane are often added. For example,  molded vulcanized silicone rubber formula: methyl vinyl silicone rubber 100; silica gel with white carbon black A-2 45 ~ 50; DBPMH 0.5 ~ 1 ; hydroxy silicone oil 2 ~ 3. Hot air vulcanized extruded product high tear resistant silicone rubber formula: methyl vinyl silicone rubber 100; fumed silica W909 50; paste DCBP (40%) 1.5.

Medical grade liquid silicone rubber, MY M650 series