The Role of Silica in Different Types of Coatings

White Carbon Black, Amorphous Precipitated Silica, Precipitated Silica, White Carbon, Flatting Agent, Matting Agents, Silica Matting Agent

Precipitated silica is widely found in nature and is the main component of non-metallic products such as ceramics and glass. In particular, ultrafine silica, due to its small particle size, has special properties such as large specific surface area, strong surface adsorption, large surface energy, high chemical purity, good dispersion performance, heat resistance, and electrical resistance. Its stability, reinforcement, thickening and thixotropy are widely used in rubber, plastics, coatings and other fields. Today we will take a look at the application of silica in these major fields.

1. Application of photocurable coatings

Ultraviolet curing coating (UVCC) is an environmentally friendly and energy-saving coating developed in the 1960s. Compared with traditional coatings, it has the characteristics of economy, environmental protection, energy saving and high efficiency, but the disadvantage is that the equipment and raw materials are expensive, the adhesion is poor, and it is easy to crack. Filling silica powder into the UV-curable coating can significantly improve the hardness and heat resistance of the cured coating. At the same time, it can improve the curing speed, coating hardness, adhesion and low temperature thermal stability of UV-curable coatings. The study also shows that the presence of silica powder can significantly improve the abrasion resistance, hardness, impact strength and flexibility of epoxy acrylate UV-curable coatings.

2. Application of silica powder in architectural coatings

It can effectively reduce the chromatic aberration value of coatings caused by ultraviolet and infrared light irradiation, and improve the aging resistance of exterior wall coatings. It can also significantly enhance the hardness, adhesion and weather resistance of the coating, improve the viscosity and anti-settling ability of the coating, and enhance the stability of the coating.

3. Application in color inkjet printing paper coating

Color inkjet printing paper can often be used in the field of life, especially many large companies often use it for document printing. However, due to the pores and cracks in its surface, a primer is required to improve the performance of this paper. However, if silica powder is added to this primer, it can not only effectively improve the effect of the primer, but also improve the overall quality of the paper sheet, and provide the paper sheet with good water absorption performance. In addition, if silica powder is added to the pigment, a special coating for digital color inkjet printing paper with good performance can be made, which can not only make the coating load moderate, but also effectively solve the problems of formaldehyde and printing. The effect is good, the materials are easily available, and it can be said to be economical and practical.

4. Application of silica powder in plastic coatings

It also has a good promotional effect on the related thermal properties of polyethylene, not only can it effectively improve the thermal stability of the composite material, but also has a large degree of flame retardant properties. Improve. It can be said that in the application of plastic coatings, silica powder can comprehensively improve the overall quality of coatings.

5. Application in metal protective coatings

Silicon dioxide is widely used in the field of coatings, especially when silica powder is added to metal protective coatings, the quality of the coatings will be further improved. Many researchers have tried the role of silica powder, and the results show that silica powder can significantly enhance the carbon layer strength of metal protective coatings, and also improve the fire resistance limit of steel structural materials.