Silicone oil is a polyorganosiloxane with a chain structure of different degrees of polymerization. It is produced by hydrolyzing dimethyldichlorosilane with water to obtain a primary polycondensation ring body. The ring body is cracked and distilled to obtain a lower ring body. Then the ring body, head-capping agent and catalyst are put together and polymerized to obtain each Silicone oil can be obtained by distilling a mixture of different degrees of polymerization under reduced pressure to remove low boiling matter.
The most commonly used silicone oil, organic groups are called silicone oil. Organic groups can also use other organic groups to replace part of the methyl groups to improve certain properties of the silicone oil and apply it to various uses. Other common groups include hydrogen, chlorine, trifluoropropyl, etc. In recent years, organically modified silicone oil has developed rapidly, and many organically modified silicone oils with special properties have appeared.
Silicone oil is generally a colorless (or light yellow), transparent and non-volatile liquid. Silicone oil is insoluble in water, methanol, glycol and -ethoxyethanol, miscible with benzene, dimethyl ether, carbon tetrachloride or kerosene, and slightly soluble in dioxane, ethanol and methanol. It has a small vapor pressure, high flash point and fire point, and low freezing point. As the number of chain segments n increases, the molecular weight increases and the viscosity also increases. Therefore, silicone oil can have various viscosities, from 0.65 centistokes to millions of centistokes. If you want to prepare low-viscosity silicone oil, you can use acidic clay as a catalyst and telomerize at 180°C, or use sulfuric acid as a catalyst and telomerize at low temperature to produce high-viscosity silicone oil or viscous materials. catalyst.
Silicone oil is divided into methyl silicone oil, ethyl silicone oil, phenyl silicone oil, methyl hydrogen silicone oil, methyl phenyl silicone oil, methyl chlorophenyl silicone oil, methyl ethoxy silicone oil, methyl trifluoropropyl silicone oil according to the chemical structure. Silicone oil, methyl vinyl silicone oil, methyl hydroxyl silicone oil, ethyl hydrogen silicone oil, hydroxyl hydrogen silicone oil, cyanide silicone oil, etc.; according to the use, there are lubricating silicone oil, oil bath silicone oil, damping silicone oil, diffusion pump silicone oil , hydraulic oil, insulating oil, heat transfer oil, brake oil, etc.
Silicone oil has excellent heat resistance, electrical insulation, weather resistance, hydrophobicity, physiological inertness and small surface tension. In addition, it also has a low viscosity-temperature coefficient and high compression resistance. Some varieties are also radiation resistant. performance. Introduction to the varieties and uses of silicone oil Silicone oil is a polyorganosiloxane with a chain structure of different degrees of polymerization. It is produced by hydrolyzing dimethyldichlorosilane with water to obtain a primary polycondensation ring body. The ring body is cracked and distilled to obtain a lower ring body. Then the ring body, head-capping agent and catalyst are put together and polymerized to obtain each Silicone oil can be obtained by distilling a mixture of different degrees of polymerization under reduced pressure to remove low boiling matter.
The most commonly used silicone oil, all organic groups are methyl groups, is called methyl silicone oil. Organic groups can also use other organic groups to replace part of the methyl groups to improve certain properties of the silicone oil and apply it to various uses. Other common groups include hydrogen, ethyl, phenyl, chlorophenyl, trifluoropropyl, etc. In recent years, organically modified silicone oil has developed rapidly, and many organically modified silicone oils with special properties have appeared.
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