Dimethicone is a transparent, colorless, tasteless, odorless and non-toxic oily liquid. It has the characteristics of high flash point, low freezing point, good thermal stability, and high and low temperature resistance. It can be used for a long time at -50℃~+180℃. If it is isolated from air or in an inert gas, the temperature can reach 200℃. The surface silicon tension of the oil is very small, the compressibility is large, the shear resistance is good, the viscosity-temperature coefficient is small, and the dielectric loss is small; it is resistant to arcs, corona, and is not flammable; it is hydrophobic and moisture-proof, and it also has good physiological inertness.
The specific applications and functions of dimethyl silicone oil are as follows:
1. Transformer oil, capacitor oil
2. Defoaming Agent: Because dimethyl silicone oil has a small surface tension and is insoluble in water, animal and vegetable oils and high-boiling point mineral oils, it has good chemical stability and is non-toxic. It has been widely used as a defoaming agent in chemical industry, medical treatment, pharmaceuticals, etc. In food processing, textile, printing and dyeing, papermaking and other industries, as long as 10-100PPM silicone oil is added, it will have a good defoaming agent effect.
3. Release agent: Due to the non-stickiness between dimethyl silicone oil and rubber, plastics, metals, etc., it is also used as a release agent for the molding and processing of various rubber and plastic products, and for precision casting. middle. Using it as a release agent not only facilitates demoulding, but also makes the surface of the product clean, smooth and clear in texture.
4. Insulation, dustproof, and anti-mildew coating: dip-coat a layer of dimethyl silicone oil on the surface of glass and ceramics, and heat treat it at 250-300°C to form a semi-permanent layer. waterproof, mildew-proof and insulating membrane. Used to treat insulating devices, it can improve the insulation performance of the device; used to treat optical instruments, it can prevent lenses and prisms from getting moldy; used to treat medicine bottles, it can extend the shelf life of medicines and prevent preparations from being lost due to sticking to the wall; It can lubricate the surface of film film, reduce friction and extend the life of the film.
5. Lubricant: Suitable for use as lubricant for rubber, plastic bearings and gears. It can also be used as a lubricant for rolling friction between steel and steel at high temperatures, or for friction between steel and other metals. However, since the lubricating properties of methyl silicone oil are not particularly good at room temperature, it is generally not recommended as a lubricant for metals at room temperature. lubricant between.
6. Additive: It can be used as an additive for many materials. For example, it can be used as a gloss enhancer for paint. Adding a small amount of silicone oil to the paint can make the paint non-floating and wrinkle-free, and improve the brightness of the paint film. Adding a small amount of silicone oil to the ink can improve the printing quality. Adding a small amount of silicone oil to the polishing oil (such as automobile varnish) can increase the brightness, protect the paint film, and have excellent waterproof effect.
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