The application of silica gel has been very wide, but the understanding and distinction of silica gel and silicone rubber may be not understood.Today, this paper will elaborate on the difference and classification of silica gel and silicone rubber.At present, the concept of the word "silica gel" is not standardized, because there is no national regulation so far.When we hear the word "silicone," it's important to understand whether it's silica or silicone rubber, or inorganic or organic.

  The term "silica gel" has several related words: silicon rubber, silicon rubber, silicon Likon.The relationship between silicone rubber and silicone rubber, the difference between silicone rubber and silicone rubber, silicone rubber is the organic "silicone" in "silicone"."Silicone" is a term in Hong Kong and Taiwan, and is called "silicone" in Mainland China. Silicone and silicone Are the transliteration of English silicone, and we usually say that it also refers to "silicone".

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

  Inorganic silica gel is a kind of high activity adsorption material, usually with sodium silicate and sulfuric acid reaction, and after aging, acid bubble and a series of post-treatment process.Silica gel is amorphous material, its chemical formula is mSiO2.NH2O.Insoluble in water and any solvent, non-toxic tasteless, stable chemical properties, in addition to strong alkali, hydrofluoric acid does not react with any material.Various types of silica gel due to its different manufacturing methods and the formation of different microporous structures.

  The chemical composition and physical structure of silica gel determines that it has many characteristics that are difficult to be replaced by other similar materials: high adsorption performance, good thermal stability, stable chemical properties, high mechanical strength, etc.Because of its chemical properties, it is used to do many kinds of silica gel products, such as silica gel sealing ring, silica gel sealing strip, silica gel kitchenware and so on.

  Silica gel according to the size of its aperture is divided into: macroporous silica gel, coarse porous silica gel, B type silica gel, fine porous silica gel.Due to the difference of pore structure, their adsorption properties are different.Coarse pore silica gel in the case of high relative humidity has a higher adsorption capacity, fine pore silica gel is in the case of low relative humidity absorption is higher than coarse pore silica gel, and B type silica gel due to pore structure between coarse and fine pores, the adsorption capacity is also between coarse and fine pores.Macroporous silica gel is generally used as catalyst carrier, extinction agent, toothpaste abrasive, etc. 

  From the product classification, application characteristics and precautions of silica gel, silicone rubber raw materials and liquid silicone rubber raw materials, there will be their respective differences. The application technology and main application uses of silica gel raw materials and liquid silicone rubber raw materials are well known. We can find, study and explore more.Know silica gel. 

  Extinction agent extinction mechanism

  (1) an additive used in chemical fiber production, added to the polymer fiber spinning, can improve the fiber surface of the optical reflection is too strong, so the name of the extinction agent.The principle of extinction is that the refractive index of the extinction agent is very different from that of the fiber forming polymer. After adding the fiber, the incident light is scattered and the aurora is eliminated, transparency is reduced and whiteness is increased.The commonly used extinction agent in chemical fiber production is titanium dioxide (TiO2), the particle size is less than 1μm, according to different extinction requirements, the amount of extinction agent can be between 0.03% ~ 4.0%.

  (2) the paint film surface to produce expected roughness, obviously reduce the surface gloss of a kind of coating additives.Extinction agent is a very fine suspended matter dispersed in the paint, film forming these suspended matter distribution in the paint film surface, reduce the paint film surface light mirror reflection, the formation of rough surface and achieve extinction effect.The main varieties are metal soap, wax, and functional physical pigment such as diatomite, synthetic silica.Used for preparing various matte paints.