Generally speaking, silica gel can be divided into organic silica gel and inorganic silica gel according to its properties and components.


Inorganic silica gel is a highly active adsorption material, which is usually prepared by reacting sodium silicate with sulfuric acid, aging, acid bubble and a series of post-treatment processes. Silica gel is an amorphous substance, and its chemical formula is mSiO2. nH2O. It is insoluble in water and any solvent, non-toxic and tasteless, with stable chemical properties, and does not react with any substance except strong base and hydrofluoric acid.


Use of organic silica gel


The application range is very wide. It is not only used as a special material in aviation, cutting-edge technology and military technology sectors, but also used in various sectors of the national economy. Its application scope has expanded to: construction, electronics and electrical, textile, automobile, machinery, leather and paper making, chemical and light industry, metal and paint, medicine and medicine, etc.


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White carbon black, also known as precipitated hydrated silica and micro silicic acid. Properties: The main component of this product is SiO2, its molecular formula is SiO2nH2O1, which is white, amorphous fine powder, light, with an original diameter of less than 0.0003cm. Melting point: 1750 ℃, high insulation, insoluble in water and acid, soluble in caustic soda and hydrofluoric acid, non decomposable under high temperature, water absorbent. This product is a reinforcing filler widely used in the rubber and plastic industries. Its reinforcing effect is second only to that of white carbon black in rubber products. The main characteristics of vulcanizates with white carbon black are: high tensile strength, large elongation, good elasticity and heat resistance. This product is applicable to natural rubber and synthetic rubber. Adding 5 to 10 phr of white carbon black to replace part of carbon black in the tread of natural/styrene butadiene rubber and natural/cis-1,4-polybutadiene rubber truck tires can improve the tear resistance of the compound and the thermal stability of the vulcanizate. In the use formula, it is better to add silane coupling agent (Si -- 69) at the same time.


3、 Uses: It is used as filler for rubber, plastic, paint, paint (putty) and synthetic resin, as well as as thickener for printing ink, light polishing agent for metal, casting release agent and insulating material, and also used to make white pigments, models, pesticide carriers and adhesives.