The classification system of silicone rubber is like a precise chemical palace, weaving a diverse and functionally distinct material map based on vulcanization temperature, chemical structure, and application scenarios. As a polymer elastomer with silicon oxygen bonds as the main chain, its classification logic is first reflected in the differences in vulcanization processes - high-temperature vulcanized silicone rubber (HTV) needs to be vulcanized in a high-temperature furnace at 150-200 ℃. The vinyl groups in its molecular chain react with crosslinking agents at high temperatures to form a three-dimensional network structure. This process endows HTV with excellent mechanical strength and high temperature resistance, and is often used to manufacture components that require extreme temperature and pressure, such as spacecraft seals and pressure cooker gaskets; Room temperature vulcanized silicone rubber (RTV), on the other hand, solidifies at room temperature with the help of moisture or catalysts in the air. Its single component or two-component formula design makes it an ideal choice for building sealants and electronic potting adhesives. Especially in the joint treatment of glass curtain walls, RTV can quickly cure in humid environments, forming an elastic sealing layer that effectively resists rainwater infiltration and temperature deformation.

From the perspective of chemical structure, the side chain groups of silicone rubber are like variation symbols in musical scores, endowing the material with unique performance melodies. Methyl silicone rubber is based on fully methyl substituted polydimethylsiloxane. Although its high temperature resistance is limited, it has become the preferred material for baby pacifiers and medical catheters due to its excellent biocompatibility and low surface energy; When vinyl is introduced into the side chain, the vulcanization activity of methyl vinyl silicone rubber is significantly improved, and its high temperature resistance can be extended to 250 ℃, which is highly effective in automotive engine seals and wire and cable insulation layers; Phenyl silicone rubber breaks the curse of "low-temperature brittleness" of silicone rubber by introducing phenyl side chains - the three-dimensional barrier of phenyl groups reduces the crystallization tendency of molecular chains at low temperatures, allowing the material to maintain flexibility at -70 ℃. This characteristic makes it indispensable in polar scientific research equipment and low-temperature laboratory seals; Fluorosilicone rubber endows materials with excellent oil and solvent resistance through the strong electronegativity of fluorine atoms. In aviation fuel pipelines and corrosion-resistant seals in chemical plants, fluorosilicone rubber can withstand long-term corrosion from aviation kerosene and hydraulic oil, far exceeding the corrosion resistance limit of ordinary rubber.

As the "liquid spirit" in the silicone rubber family, liquid silicone rubber (LSR) has opened up a new world of precision manufacturing with the characteristics of low viscosity and high fluidity. Its two-component liquid form can be directly injected into complex molds through injection molding technology, forming precision components with a wall thickness of only 0.1 millimeters after solidification. This characteristic gives it an advantage in the manufacturing of micro components such as medical catheter connectors, optical lens encapsulation, and electronic consumer product buttons; And additive liquid silicone rubber, with its characteristics of no by-products and good dimensional stability, has become a safe choice for products that come into direct contact with the human body, such as baby pacifiers and diving goggles frames.

Regarding liquid silicone rubber, please refer to our website for details: IOTA Liquid Silicone Rubber