What Are The Matting Methods For Powder Coatings?

What are the matting methods for powder coatings? How to choose the right matting powder according to the characteristics of the prepared coating to achieve the desired effect? ​​The control of gloss is an important part of a successful coating formula.

The influence of the average particle size of matting powder on coatings:

1. The relationship between average particle size and transparency: The smaller the particle size of the matting powder, the less scattered visible light, and a large amount of incident light passes through the matting powder due to diffraction, so the transparency of the system is better. However, if the average particle size is too small, there will be fewer particles that play a matting role, and the matting effect will not be achieved. When the average particle size is coordinated with the thickness of the coating, the larger the average particle size, the better the matting effect of the matting powder. Therefore, when selecting a matting powder, it is necessary to consider the factors of matting, transparency and coating thickness at the same time, and select the matting powder that best meets the requirements through comparative tests.

2. The relationship between average particle size and anti-settling property: In the same system, placed for the same time, the system with a large average particle size has a fast powder sinking rate and is easy to form hard precipitation.

3. Relationship between average particle size and matting property: the larger the average particle size, the better the matting effect of the coating; the smaller the average particle size, the better the transparency of the coating. In the process of selecting matting powder, a series of comparative tests should be conducted to ensure that the matting and transparency properties can better meet the actual use requirements. The smaller the average particle size distribution, the higher the viscosity of the system and the lower the sedimentation rate. When selecting matting powder, it is best to consider the factors of matting and sedimentation at the same time.

The matting effect of powder coating can be achieved by adding stearate, wax powder and metal salt complex, metal organic compound, polymer incompatible with the system, etc. The purpose of physical matting can also be achieved. TIANSHI wax powder PPW-0391 has high hardness, smooth feel, high melting point, small fog shadow, auxiliary matting, and degassing effect.