The linear dimethyl silicone oil with Si-O-Si as the main chain and the methyl group connected to the silicon atom has a helical structure due to the small intermolecular force, and the methyl group is arranged outward and can rotate freely, so it has a Series features. Such as colorless and transparent, low temperature and viscosity coefficient, large expansion coefficient, low vapor pressure, high flash point, high and low temperature resistance, low surface tension, high compressibility, inert to materials, chemical inert, non-corrosive and physiological inert, positive It is these characteristics that determine its broad use.

1. Application in the 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 used as liquid shockproof and damping material in various precision machinery, instruments and meters. The shock absorption performance of 201 methyl silicone oil is less affected by temperature, and it is mostly used in the instruments of aircraft and automobiles in the occasions with strong mechanical vibration and large changes in ambient temperature.

2. As sewing thread smoother

Methyl silicone oil is widely used in oil for fiber raw silk and raw cotton, oil for spinning, and smoothing agent for sewing thread. The oil used for raw silk and raw cotton is low viscosity methyl silicone oil, generally 10 viscosity. The smoothing agent for sewing thread is medium and high viscosity methyl silicone oil, generally 500 viscosity silicone oil is used. Using the thermal stability and low viscosity-temperature coefficient of methyl silicone oil, a spinning oil made of antistatic agent, emulsifier and other oils is used in the spinning process of nylon and polyester to prevent spinning During the process, when the extremely thin monofilament bundle is ejected from the spinneret and when it is rapidly wound up, wire breakage and loosening caused by electrification occur. When melting and preventing the wire, the nozzle should also be treated with methyl silicone oil to prevent the wire from being broken due to the adhesion of carbide or melt.

3. As a defoamer

Due to its low surface tension, insoluble in water, good chemical stability and non-toxicity, dimethyl silicone oil has been widely used as a defoamer in petroleum, chemical, medical, pharmaceutical, food processing, textile, printing and dyeing, papermaking and other industries. Secondary processing of silicone oils can also produce defoamer emulsions for use in aqueous systems.

4. As a release agent

It is not sticky to rubber, plastic, metal, etc. It can also be used as a mold release agent for various rubber and plastic products molding and processing, and in precision casting. Using it as a mold release agent is not only convenient for mold release, but also makes the surface of the product clean, smooth and clear in texture.

5. For insulation, dust-proof, mildew-proof coating

Dip coating a layer of 201 methyl silicone oil on the surface of glass and ceramics, and heat treatment at 250-300 ℃, a semi-permanent waterproof, mildew-proof and insulating film can be formed. It can be used to treat insulating devices to improve the insulation performance of the device; it can be used to treat optical instruments to prevent lenses and prisms from getting moldy; it can be used to treat medicine bottles to prolong the shelf life of medicines without causing loss of preparations due to sticking to the wall; The surface of the film film can be lubricated, reduce friction and prolong the life of the film.

6. As a lubricant

Used as lubricant for rubber, plastic bearings and gears. It can also be used as a lubricant for steel-to-steel rolling friction at high temperatures, or as a lubricant for steel and other metals.

7. As an additive

It can be used as an additive for many materials, such as a gloss enhancer for paint. Adding a small amount of silicone oil to the paint can make the paint not float and wrinkle, and improve the brightness of the paint film; adding a small amount of silicone oil to the ink can improve the brightness of the paint film. Printing quality; adding a small amount of silicone oil to polishing oil (such as car varnish) can increase brightness, protect paint film, and have excellent waterproof effect.

8. Other aspects

Taking advantage of its high flash point, odorless, colorless, transparent and non-toxic to human body, it can be used as a heat carrier in oil baths or thermostats in steel, glass, ceramics and other industries and scientific research. Using its good shear resistance, it can be used as hydraulic oil, especially aviation hydraulic oil. Using it to treat rayon spinning head can eliminate static electricity and improve the quality of spinning. Adding silicone oil to cosmetics can improve the moisturizing and protective effect of the skin and so on.