Inorganic silica gel (silica gel)
Inorganic silica gel is a highly active adsorption material, which is usually prepared by reacting sodium silicate and sulfuric acid and undergoing a series of post-treatment processes such as aging and acid foaming. Silica gel is an amorphous substance, and its chemical formula is mSiO2. nH2O. It is insoluble in water and any solvents, non-toxic, tasteless, chemically stable, and does not react with any substances except strong alkalis and hydrofluoric acid. Various types of silica gel form different microporous structures due to their different manufacturing methods.

The chemical composition and physical structure of silica gel determine that it has many characteristics that other similar materials are difficult to replace: high adsorption performance, good thermal stability, stable chemical properties, and high mechanical strength. Because of its chemical properties, it is used to make many kinds of silicone products, such as silicone seals, silicone seals, silicone kitchenware and so on.

According to the size of its pore size, silica gel is divided into: macroporous silica gel, coarse pore silica gel, type B silica gel, and fine pore silica gel. Due to the difference in pore structure, their adsorption properties have their own characteristics. Coarse-pored silica gel has a higher adsorption capacity when the relative humidity is high, while fine-pored silica gel has a higher adsorption capacity than coarse-pored silica gel when the relative humidity is low. Type B silica gel has a pore structure between coarse and fine. Between the pores, the amount of adsorption is also between the coarse and fine pores. Macroporous silica gel is generally used as a catalyst carrier, matting agent, toothpaste abrasive and so on.

In terms of the product classification, application characteristics and precautions of silica gel, silicone rubber raw materials, and liquid silicone rubber raw materials, there will be their own differences. The application technology and main application uses of silica gel raw materials and liquid silicone rubber raw materials are familiar, and we can better To discover, research and explore more. Learn about silica gel.

Silicone resin is mainly used as insulating paint (including varnish, enamel, colored paint, varnish, etc.) to impregnate H-class motors and transformer coils, and to impregnate glass cloth, glass cloth silk and asbestos cloth to make motor covers and electrical insulation windings Wait.

Silicone resin can be used as heat-resistant and weather-resistant anti-corrosion coatings, metal protective coatings, waterproof and moisture-proof coatings for construction projects, release agents, adhesives and secondary processing into silicone plastics for use in electronics, electrical and defense industries. Semiconductor packaging materials and insulating materials for electronic components, etc.

Silicone resin can also be used as heat-resistant and pressure-resistant anti-corrosion coatings, metal protective coatings, waterproof and moisture-proof coatings for construction projects, release agents, adhesives and secondary processing into silicone plastics for use in electronics, electrical and defense industries .

Compared with other silicone materials, silicone resins have relatively fewer varieties and a smaller market share.

Using pure silicone resin or modified silicone resin as the base material, the silver paint with aluminum powder can be used at a temperature of 400-450°C, or even 600°C. Compared with general organic resins, silicone resins have excellent weather resistance. The wavelength range of the sunlight spectrum is more than 300nm, while silicone resins only absorb light below 280nm.

The hydrolysis of silicone resin often includes two or more monomers with different hydrolysis rates. In order to smooth out the differences in the hydrolysis rates of different silanes and cause uniform co-hydrolysis conditions, the method of simultaneous hydrolysis and alcoholysis is usually adopted.