Coating industry

Mainly using organic modified silica sol

        The silica sol particles are fine, and the silica during gel precipitation has high activity, which can form new silicate inorganic polymer compounds with certain inorganic salts and metal oxides, forming a very hard film; The small particles have a strong penetration force on the substrate, and can penetrate into the interior of the substrate through capillary action. They can react with the alkaline substance Ca (OH) z in the substrate to generate calcium silicate, making the coating film have strong adhesion.

        The enhancement of adhesion is a comprehensive effect of the penetration and hardening bonding of silica sol, which is the result of mechanical bite and chemical bonding. Therefore, it has better surface adhesion adhesion than general coatings. The silica sol is mixed with organic polymer to evenly distribute the organic polymer in the gaps of the silicon oxygen silicon inorganic coating, shielding the remaining hydrophilic groups in the inorganic coating. When the coating is subjected to cold and hot alternation, the contraction of the coating is buffered, and the coating has a certain degree of elasticity. The formed coating combines the characteristics of both inorganic and organic coatings, making up for the shortcomings of both.

        After the formation of silica sol film, a network structure of silica oxide is formed, which is not afraid of acid or alkali and improves the performance of the coating. The composite wall coating prepared with silica sol as the main film-forming material, synthetic lotion (such as styrene acrylic lotion, vinyl acetate resin lotion, etc.) as the auxiliary film-forming material, pigment, filler, and JJH-J addition has unique water resistance, fire resistance, scrub resistance, and pollution resistance. The casting coating prepared by mixing silica sol and refractory powder can effectively prevent molten steel adhesion and plate wear during the casting of steel ingots. Most high-end latex paints, such as Nippon Paint, now contain silica sol.

        In addition, silica sol is widely used in the preparation of thermal conductive coatings for metal surface layers, water resistant porcelain like coatings, wall bead steel coatings, energy-saving and anti-corrosion high-temperature ceramic coatings, metal insulation coatings, foaming fireproof coatings, and so on.