What is the effect of the average particle size of the matting powder on the coating?

With the continuous improvement of living standards, people need paints with different gloss. Matte paint attracts consumers with its naturalness, nobility and elegance. In addition, the matte-coated surface masks minor film defects for a uniform appearance, popular with paint manufacturers.

Therefore, how to select a suitable matting powder according to the characteristics of the prepared coating to achieve the expected effect has become the main problem of the coating formulator. Control of gloss is an important part of a successful paint formulation.

What is the effect of the average particle size of the matting powder on the coating?

1. The relationship between average particle size and transparency:

As the average particle size increases, the transparency deteriorates. The smaller the particle size of the matting powder, the less scattered visible light, and a large number of incident light rays pass through the matting powder due to diffraction, so the transparency of the system is better. However, if the average particle size is too small, the less particles will play a matting effect, and the due matting effect will not be achieved. When the average particle size is coordinated with the thickness of the coating film, the larger the average particle size, the better the matting effect of the matting powder. Therefore, when choosing a matting powder, the factors of matting, transparency and coating film thickness should be considered at the same time, and a matting powder that meets the requirements should be selected through a comparative test.

2. The relationship between average particle size and anti-settling property:

In the same system, placed for the same time, the system with a larger average particle size, the powder sinks faster and is easy to form a hard precipitate. The sedimentation rate is proportional to the square of the particle size, so the larger the average particle size, the faster the sedimentation rate.

3. The relationship between average particle size and extinction:

The larger the average particle size, the better the matting effect of the paint; the smaller the average particle size, the better the paint transparency. In the process of selecting the matting powder, a series of comparative tests should be passed, so that the matting and transparent properties can better meet the actual use requirements.

The smaller the average particle size distribution is, the viscosity of the system will increase, and the sedimentation rate will also decrease. When selecting matting powder, the factors of matting and sedimentation should be considered at the same time.

Jiangmen Shengpeng Chemical Industry Co., Ltd. specializes in the production of various chemical raw materials: coating matting agent, thixotropic thickener, special silica for glass glue, special silica for mixing rubber, DMC, dimethyl silicone oil, 107 room temperature vulcanization Silicone rubber, hydroxy silicone oil, hydrogen-containing silicone oil, vinyl silicone oil, methyl capping agent, zinc stearate, calcium stearate, magnesium stearate and other products, all product indicators meet or exceed national standards. The products are widely used in PU, NC, PE paint and other wood coatings, automotive coatings, marine coatings, powder coatings, textiles, cosmetics, rubber products and other fields. The product quality is guaranteed, and the SGS test results meet the EU ROHS directive standard. We sincerely hope to achieve more extensive cooperation with domestic and foreign customers, and we are willing to work together with you to create a better future!

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