Linear dimethyl silicone oil with Si-O-Si as the main chain and methyl groups connected to silicon atoms has a certain series features. Such as colorless and transparent, small thermal viscosity coefficient, large expansion coefficient, low vapor pressure, high flash point, high and low temperature resistance, low surface tension, high compressibility, inert to materials, chemically inert, non-corrosive and physiologically inert, positive It is these characteristics that determine its wide use.
1. Application in electromechanical industry
It is widely used in motors, electrical appliances, and electronic instruments as an insulating medium for temperature resistance, arc corona resistance, corrosion resistance, moisture resistance, and dust resistance. It is also used as an impregnating agent for transformers, capacitors, and scanning transformers for TV sets. In various precision machinery, instruments and meters, it is used as a liquid shockproof and damping material. The shock absorption performance of 201 methyl silicone oil is less affected by temperature, and it is mostly used in the occasions with strong mechanical vibration and large changes in ambient temperature, and is used in the instruments of aircraft and automobiles.
2. As a sewing thread smoother
Methyl silicone oil is widely used in fiber precursors, oils for raw cotton, oils for spinning, and smoothing agents for sewing threads. The oil agent for raw silk and raw cotton is low-viscosity methyl silicone oil, generally 10 viscosity. For example, the Dow 10-viscosity silicone oil distributed by Hongruize is widely used in the production process of spandex spinning. The smoothing agent for sewing thread is medium to high viscosity methyl silicone oil, generally 500 viscosity silicone oil. Utilizing the thermal stability and low viscosity-temperature coefficient of methyl silicone oil, it is a spinning oil agent made of antistatic agent, emulsifier and other oil agents. It is used in the spinning process of nylon and polyester to prevent spinning During the process, when the extremely fine monofilament bundle is ejected from the spinneret and when it is quickly wound up, the wire breakage and loosening caused by electrification occur. When melting the anti-filament, the nozzle should also be treated with methyl silicone oil to prevent the adhesion of carbides or melts and cause broken filaments.
3. As a defoamer
Due to its small surface tension, insoluble in water, good chemical stability and non-toxicity, simethicone oil has been widely used as a defoamer in petroleum, chemical, medical, pharmaceutical, food processing, textile, printing and dyeing, papermaking and other industries. The secondary processing of silicone oil can also produce defoamer emulsion, which is applied to water-based system,
4. As a release agent, it is not sticky to rubber, plastic, metal, etc., and can be used as a release agent for various rubber and plastic products, and in precision casting. Using it as a release agent is not only convenient for demoulding, but also makes the surface of the product clean, smooth and clear in texture.
5. Used as insulation, dustproof and anti-mildew coating
Dip-coat a layer of 201 methyl silicone oil on the surface of glass and ceramics, and after heat treatment at 250-300 ° C, a semi-permanent waterproof, mildew-proof and insulating film can be formed. Using it to treat insulating devices can improve the insulation performance of the device; using it to treat optical instruments can prevent lenses and prisms from becoming moldy; using it to treat medicine bottles can prolong the shelf life of medicines and prevent the loss of preparations due to sticking to the wall; Treating the surface of the movie film can lubricate, reduce friction and prolong the life of the film.
6. As a lubricant
Lubricant for rubber, plastic bearings and gears. It can also be used as a lubricant for the rolling friction of steel against steel at high temperature, or the friction between steel and other metals.
7. As an additive
It can be used as an additive for many materials. For example, it can be used as a brightening agent for paint. Adding a small amount of silicone oil to the paint can prevent the paint from floating or wrinkling, and improve the brightness of the paint film; adding a small amount of silicone oil to the ink can improve Printing quality; adding a small amount of silicone oil to the polishing oil (such as car varnish) can increase the brightness, protect the paint film, and have excellent waterproof effect.

For silicone oil, please check it:
https://www.siliconefoam.net/product-hydroxyl-blocking-polymethyl-silicone-oil-(general-type)-iota-1203-.html