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Dimethicone, also known as polydimethylsiloxane, is a colorless and transparent synthetic polymer material. It comes in a wide range of viscosities, from 5cps to 2 million cps, presenting in forms ranging from easily flowing liquids to thick semi - solids. This diverse range of viscosities enables it to adapt to a variety of application scenarios.
Dimethicone boasts an array of impressive properties. Its slipperiness and softness make surfaces in contact with it extremely smooth and pleasant to the touch. Its water - repellent nature allows it to perform well in humid environments, effectively preventing water penetration. With excellent chemical stability, it can resist erosion from various chemical substances. Its electrical insulation property ensures its reliable use in the electronic and electrical industries. The ability to withstand a wide temperature range, from - 50℃ to + 200℃, makes it suitable for extreme environmental conditions, whether in cold polar regions or hot industrial workshops. Additionally, it has a high flash point, a low freezing point, a small viscosity - temperature coefficient, a large compressibility, low surface tension, good water - repellent and moisture - proof properties, and a low specific heat and thermal conductivity coefficient, all of which lay the foundation for its wide application.
The applications of dimethicone are extremely broad. In the cosmetics industry, it is a common ingredient in skin care creams, shower gels, shampoos, and other cosmetic formulations, providing a softening effect and a silky feel to enhance the user experience. In the rubber, plastic, latex, polyurethane, and light industries, it serves as a mold release agent, separating agent, and brightening agent during the production of certain rubber, plastic, latex, polyurethane products, and handicrafts. In the mechanical, automotive, instrumentation, electronic and electrical, and other industries, it is used as lubricating oil, liquid spring, cutting fluid, buffer oil, transformer oil, high - and low - temperature brake oil, brake fluid, instrument shock - absorbing oil, and frame molding mold release agent. In the textile and garment industries, it functions as a softening agent, water - repellent agent, feel improver, lubricant for sewing threads, lubricant for chemical fiber spinnerets, and garment pressing aids. In the leather and leather chemical industries, when added to other additives, it can be used as a softening agent, water - repellent agent, feel agent, defoaming agent, and brightening agent. In the chemical, coating, and building materials industries, it is used as a defoaming agent and lubricant. It can also be used for other specific purposes or copolymerized with other materials to generate new materials.
The usage amount of dimethicone varies according to the specific application object and environment, ranging from a few PPM to over 99%. When using dimethicone, note that it has a tendency to degrade and volatilize when in contact with high - concentration strong acids or strong bases and Lewis acids, and the reaction becomes more obvious at higher temperatures. Contact with low - concentration strong acids or strong bases or long - term exposure to high temperatures may lead to an increase in viscosity and even cross - linking. It is packaged in 50 kg polyethylene plastic drums or 200 kg iron drums. It should be stored in a dry and ventilated place at room temperature, sealed, and kept away from acid and alkaline substances. It should be stored and transported as non - dangerous goods.