What are the chemical properties of silicone and physical properties -Iota

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Service > What are the chemical properties of silicone and physical properties

What are the chemical properties of silicone and physical properties

Silicone (Silicone oil) ... silicone emulsion. For soap bath gel. DC-344. A cyclic polydimethyl siloxane. 195. Many components in cosmetics with a high degree of compatibility of the product to reduce sticky feeling, as a co-solvent, the solid powder and dispersing additive for refreshing creams, lotions, facial cleanser, lotion, makeup, perfume.

A different degree of polymerization of the silicone oil is a polyorganosiloxane chain structure. It is dimethyldichlorosilane water hydrolysis polycondensation First ring member, the ring member by the pyrolysis, distillation to obtain the low ring body, and then the ring member, the closure head, a catalyst can be put together to give the respective telomerization a mixture of different polymerization degree, by distillation under reduced pressure to remove low boiling substances can be prepared by the silicone oil.

The most common silicone oils, all organic groups are methyl, said methyl silicone oil. Organic groups can also be used to replace part of other organic groups methyl groups to improve certain properties of silicone oil, and for a variety of different purposes. Other common groups are hydrogen, ethyl, phenyl, chlorophenyl group, a trifluoromethyl group and the like. In recent years, the rapid development of organically modified silicone oil, there have been many organically modified silicone oil has special properties.

Silicone oil is generally a colorless (or pale yellow), odorless, non-toxic, non-volatile liquid. Silicone oil is insoluble in water, methanol, glycol, and - ethoxyethanol, with benzene, dimethyl ether, methyl ethyl ketone, carbon tetrachloride or kerosene miscible, slightly soluble in acetone, dioxane, ethanol, and the alcohol . It has a small vapor pressure, high flash point and ignition point, a low freezing point. As the number of segments n is different, the molecular weight increases, the viscosity increased, this solid silicone can have a variety of viscosities, from 0.65 up to a million centistokes cSt. If the system had a low viscosity silicone oil can be used as the acid clay catalyst, and at a temperature of telomerization 180 ℃, or sulfuric acid as a catalyst at a low temperature telomerization, to produce high-viscosity silicone oil or a viscous material with an alkaline catalyst.

The chemical structure of the silicone oil to be divided by the methyl silicone oil, ethyl silicone oil, phenyl silicone oil, methyl hydrogen silicone oil, methylphenyl silicone oil, methyl chlorophenyl silicone oil, silicone oil, methyl ethoxy, methyl trifluoropropyl silicone oil, methyl vinyl silicone oil, methyl hydroxy silicone oil, ethyl hydrogen silicone, hydroxyl hydrogen silicone oil, silicone oil containing cyanide; from the use of points, then the damping silicone oil diffusion pump oil, hydraulic oil, insulating oil, heat transfer oil, brake oil.

Silicone has excellent heat resistance, electrical insulation, weather resistance, hydrophobicity, physiologically inert and smaller surface tension, also has a low viscosity-temperature coefficient, high resistance to compression) and some species also resistant to radiation performance.

Silicone products and applications

Silicone oil has many special features, such as small temperature coefficient of viscosity, high temperature resistance, anti-oxidation, high flash point, low volatility, good insulation, surface tension, non-corrosive to metal, non-toxic and so on. Because of these properties, silicone oil is used in many areas and with excellent effect. In various silicone oils, silicone oil, methyl the most widely used, is the most important species of silicone oil, methylphenyl silicone oil followed. Various functional silicone oil and modified silicone oil is mainly used for special purposes.

Traits: colorless, odorless, non-toxic non-volatile liquid.

Use: There are various viscosities. Have high heat resistance, water resistance, electrical insulating properties and a smaller surface tension. Commonly used for advanced lubricants, shock oil, insulating oil, defoamers, release agents, polishes and vacuum diffusion pump oil. Methyl silicone oil is most commonly used. In addition, ethyl silicone oil, methylphenyl silicone oil, a nitrile-containing silicone oil.

Preparation or sources: from difunctional and monofunctional organic silicon monomer obtained by hydrolysis and condensation of oil.

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