Home    Company News    Effect of Silica on Thixotropy of Coatings

Effect of Silica on Thixotropy of Coatings

Hits: 510 img

Silica has a significant effect on the thixotropy of coatings, which is mainly reflected in improving the rheological properties and stability of coatings. The following is a detailed analysis of how silica affects the thixotropy of coatings:

 

1. Mechanism of action of silica

After adding silica to the coating, the silica particles will form a network structure in the coating. This structure not only improves the suspension of the coating, but also greatly increases the strength and finish of the coating. At the same time, silica can adjust the viscosity, viscosity and fluidity of the coating, thereby reducing the thixotropy of the coating.

 

2. Positive effect of silica on the thixotropy of coatings

Improve stability: An appropriate amount of silica can effectively adjust the rheological properties of the coating and make it more stable. During the production, storage, transportation and painting of the coating, silica can prevent the coating from thixotropy due to gravity, wind, vibration and other forces, that is, changes in the flow properties of the coating.

Improve painting performance: By reducing the thixotropy of the coating, silica makes the coating easier to brush. This helps to improve construction efficiency and ensure a uniform and smooth coating.

Enhanced adhesion: The addition of silica can also improve the adhesion between the coating and the substrate, making the coating more firm and durable.

3. The influence of the amount of silica added

It should be noted that the amount of silica added has an important influence on the thixotropy of the coating. An appropriate amount of silica can significantly improve the stability and brushing performance of the coating, but too high an amount of addition will cause the coating to have too low fluidity and be difficult to apply. Therefore, in the coating production process, it is necessary to select an appropriate amount of silica added according to factors such as the type of coating, the use environment and the use requirements.

 

4. Considerations in practical applications

In practical applications, in addition to considering the amount of silica added, it is also necessary to pay attention to its dispersibility, compatibility with the substrate and other performance requirements of the coating. In order to ensure the uniform dispersion of silica in the coating, high-speed stirring, grinding or ultrasonic treatment can be used. At the same time, it is also necessary to consider the influence of silica on the color, glossiness, weather resistance and other properties of the coating to ensure that the comprehensive performance of the final coating meets the requirements.

 

In summary, silica has a significant effect on the thixotropy of the coating. By reasonably controlling its addition amount and optimizing the dispersion process, the stability and brushing performance of the coating can be significantly improved.

Online QQ Service, Click here

QQ Service

Wechat Service