The synergistic effect of silica with other additives in coatings is mainly reflected in improving the performance of coatings. The following is a specific analysis of the synergistic effect of silica and several common coating additives:

1. Thixotropic properties and anti-settling agent effect

Silica has thixotropic properties, which means that adding a small amount of silica to the coating can eliminate the droplet sedimentation phenomenon of the coating and effectively prevent the precipitation of pigments and fillers. This thixotropic property makes the coating more stable during storage and use, and is not easy to stratify or precipitate.

2. Dispersant and adsorption performance

Silica can improve the adsorption of pigments and dyes and improve dispersibility. When silica is used as a dispersant, it can absorb pigment particles and make the pigment particles better dispersed in the coating. This can not only improve the uniformity of the coating, but also improve the hiding power and color brightness of the coating.

3. Thickening and rheological additive effect

Silica can also be used as a rheological additive to increase the viscosity of the coating through the interaction between its particles, making the coating easier to apply and control. At the same time, the thickened paint can better adhere to the substrate, improving the adhesion and hardness of the coating.

4. Matting and improving weather resistance

As a diffuser, silica can also play a matting role in the paint, making the coating surface softer and more uniform. In addition, silica can also improve the weather resistance, scratch resistance, aging resistance, ultraviolet absorption and infrared light reflection characteristics of the paint. The improvement of these properties helps to extend the service life of the paint and improve the quality and aesthetics of the coating.

5. Synergy with other additives

Synergy with anti-settling agents: When silica is used together with anti-settling agents, the anti-settling properties of the paint can be further enhanced to ensure that the paint does not precipitate and stratify during long-term storage and use.

Synergy with dispersants: When silica is used together with dispersants, pigments and fillers can be dispersed more effectively, improving the uniformity and hiding power of the paint.

Synergy with thickeners: When silica is used together with thickeners, the viscosity and adhesion of the paint can be further enhanced, making the coating more firm and durable.

In summary, the synergistic effect of silica and other additives in coatings is mainly reflected in improving the thixotropy, dispersibility, viscosity, matting and weather resistance of coatings. The improvement of these properties helps to improve the quality and aesthetics of coatings and extend the service life of coatings.