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 A series of characteristics, such as colorless and transparent, wide viscosity range (from 0.65 to 1000000mm2/s), small temperature and viscosity coefficient, large expansion coefficient, low vapor pressure, high flash point, high and low temperature resistance, weather resistance, radiation resistance, low surface tension , high compressibility, oxygen plasma resistance, high insulator, shear resistance, film forming, hydrophobicity, defoaming, mold release, high gloss, inert to materials, chemical inert, non-corrosive and physiological inert, it is These properties determine its broad use.

Generally, according to the viscosity range of dimethyl silicone oil, it can be divided into three types of specifications:

Low viscosity silicone oil, viscosity 0.65~50mm2/s
Medium viscosity silicone oil, viscosity 50~1000mm2/s
High viscosity silicone oil, viscosity 1000~1000000mm2/s

Main application

1. Daily chemical industry
It can be used in cosmetic formulations such as skin cream, body wash, shampoo, etc. It has excellent softening effect and silky feel, and has functions such as moisturizing and protecting the skin.

2. 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 instruments such as aircraft and automobile instruments in occasions with strong mechanical vibration and large changes in ambient temperature.
as defoamer

Due to its low surface tension and insoluble in water, animal and vegetable oils and high-boiling mineral oils, dimethyl silicone oil has good chemical stability and is non-toxic. As a defoaming agent, it has been widely used in petroleum, chemical, medical, pharmaceutical, food In the processing, textile, printing and dyeing, papermaking and other industries, as long as the silicone oil of 10-100PPM is added, it has a good defoaming effect.

3. As a release agent
It is not sticky with rubber, plastic, metal, etc., and is also 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.

4. For insulation, dustproof, anti-mildew 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 is used to treat insulating devices, which can improve the insulation performance of the device: to treat optical instruments, it can prevent lenses and prisms from getting moldy; to treat medicine bottles, it can prolong the shelf life of drugs, and prevent the 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.

5. 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.

6. 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 to 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 polishing oil (such as car varnish) can increase the brightness, protect the paint film, and have excellent waterproof effect.