Introduction of silicone oil

Jan 22, 2017

Silicone oil is a polyorganosiloxane with different degree of polymerization and chain structure. It is prepared by hydrolysis of dimethyldichlorosilane to obtain the initial polycondensation ring body. The ring body is cracked and rectified to produce low-ring body, and then the ring body, the sealing agent and the catalyst are gathered together to obtain A different degree of polymerization of the mixture, the distillation of low-pressure distillation can be obtained by the low-boiling silicone oil. The most commonly used silicone oil, organic groups are all methyl, said methyl silicone oil. Organic groups Other organic groups may also be used in place of a portion of the methyl groups to improve certain properties of the silicone oil and to suit a variety of applications. Other common groups are hydrogen, ethyl, phenyl, chlorophenyl, trifluoropropyl and the like. In recent years, organically modified silicone oil has been developing rapidly, there have been many special properties of organic modified silicone oil. Silicone oil is generally colorless (or light yellow), tasteless, non-toxic, non-volatile liquid. Silicone oil insoluble in water, methanol, diol and - ethoxy ethanol, with benzene, dimethyl ether, methyl ethyl ketone, carbon tetrachloride or kerosene miscible, slightly soluble in acetone, dioxane, ethanol and alcohol . It has a very low vapor pressure, a high flash point and a flash point, and a lower freezing point. With the number of different segments n, molecular weight increases, viscosity also increased, solid silicone oil can have a variety of different viscosity, from 0.65 centistoke up to millions of centistokes. If you want to make low viscosity silicone oil, acid clay can be used as a catalyst, and at 180 ℃ temperature for telomerization, or sulfuric acid as a catalyst, at low temperature for polymerization, the production of high viscosity silicone oil or viscous material can be alkaline catalyst.