Sericite is a type of mica, which is a silicate mineral with a layered structure. Sericite has a wide range of uses and is used in rubber, plastics, paints, ceramics, insulation, cosmetics, pigments, papermaking, metallurgy and other industries. The crystals of sericite are in the shape of scales, and the crystal aggregates are in the shape of blocks, appearing gray, purple-rose, white, etc., with a silky luster. In addition, the chemical composition, structure and structure of sericite are similar to kaolin, and it also has some characteristics of lepidolite and clay minerals, that is, it has good dispersion and suspension in water media and organic solvents, white color, fine particles, and stickiness. Therefore, sericite powder has various characteristics of mica minerals and clay minerals. When used in coatings, it can greatly improve the weather resistance and water permeability resistance of the coating film, enhance the adhesion between the coating film and the substrate, and enhance the strength of the coating film. Improve the appearance of coating films. At the same time, the dye particles easily enter between the crystal lattice layers of the sericite powder, thereby keeping the color from fading for a long time.
Application of sericite in coatings Comparison of application of sericite and other inorganic fillers:
As can be seen from the above table, compared with other inorganic fillers, sericite has better performance in performance media and coatings. Application functions all show great advantages. Therefore, sericite is particularly suitable as an additive for paints and coatings and a filler for some unique coatings. It can greatly improve the anti-aging performance of the coating, enhance the weather resistance of the coating, and also has the characteristics of preventing cracks, discoloration, delayed powdering, atmospheric aging resistance, and strong resistance. Therefore, it is widely used in waterproof coatings, anti-rust coatings, insulating coatings, fire retardant coatings, road marking coatings, anti-pollution coatings, anti-high temperature coatings and other special coatings. It is an indispensable raw material additive in the production process of coating companies.
In addition, the application advantages of sericite are very significant, which are mainly reflected in the following three points:
1. The diameter and thickness of sericite are relatively large, which can be as high as more than 80, so when added to After coating, the resulting coating film is layered in sheets. This will not only improve the penetration resistance of the coating, but also improve the scratch resistance of the coating.
2. The test results of the coating film before and after the addition of sericite showed that the hardness of the coating film with sericite added was more than double that of the ordinary coating film without addition. In addition, the boiling water resistance of sericite paint is significantly higher than that of ordinary paint.
3. Sericite coating has higher weather resistance than ordinary coatings in practical applications, and can greatly extend the service life of the coating.
From this, bismuth subcarbonate can be seen that sericite plays a very important role in coating applications, bringing higher performance and architectural applications to coating products. To this end, Jinhaohui Mining has successively launched five series of sericite powder, including rubber and plastic grade sericite powder and wet process grade sericite powder, which meet the multiple requirements of different production specifications of the majority of coating manufacturers.
