Summary of the application performance of matting powder in coatings

The physical and chemical technical indicators of matting powder mainly include: average particle size, porosity, oil absorption, and the method and degree of surface treatment. Respectively affect the application performance of matting powder in coatings.

The application properties of matting powder in coatings mainly include the following:

1) Matting

This performance is the main role of matting powder in coatings. The standard test method for matting is to add the same amount of matting powder to the same system, prepare a coating and then make a paint film of the same thickness. Generally speaking, the average The matting powder with large particle size has good matting performance, and the matting powder with high porosity has good matting efficiency.

2) Transparency

On the basis of extinction efficiency, it is very important to not affect the transparency of the paint film. The refractive index of micron-scale silica is about 1.46, and the refractive index of coating resin is 1.4-1.5, which is close, so the transparency is good. Theoretically, the larger the average particle size, the worse the transparency of the coating. The smaller the average particle size is, the less visible light is scattered, and a large amount of incident light is diffracted and transmitted through the matting powder, so the transparency of the coating is better. Another point is that the wax-treated matte powder will be slightly less transparent.

3) Dispersion

This performance is also one of the important properties of matting powder. Matting powder has a sponge-like structure. Long-term high-speed dispersion or grinding will reduce the particle size, and destroy the sponge-like structure to form a smooth section, which will affect the matting effect. Generally, the particle size of all matting powders is within 2-15μm, which will not affect the surface. However, it should be noted that the dispersion fineness of the coarse particle size will be high, which will affect the hand feel, but will not affect the uniformity of the surface.

4) Anti-sinking

It is mainly related to the particle size and surface treatment. The wax-treated matting powder particles are not easy to form hard precipitation. If there is no dispersed anti-settling agent in the customer's system, it is recommended that he use wax-treated matting powder.

5) Thixotropy

The matting powder with small oil absorption has little thixotropy to the coating, and a good matting powder cannot have an excessively thickening effect on the system, otherwise it will cause the system to be too thixotropic. If the customer wants to make matting paste, it is recommended to recommend matting powder with less oil absorption. Because the matting paste with large thixotropy is inconvenient to use; in addition, the thixotropy of wax treatment is small.

6) Surface effect

The fine-grained matting powder feels more delicate, and the matting powder with wax treatment feels better and looks silky.

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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