What are the applications of matting powder?


Our editor recently noticed that the search index of matting powder has increased. It must be that you want to know about matting powder or the demand has increased recently. So, taking this opportunity, today, we will also tell you about the knowledge of matting powder. What are its matting principles and applications? Let's take a look.


Matting powder is a new type of leather matting agent made of polyacrylamide and film-forming material.


Depending on the application, semi gloss or matte powder coatings are sometimes required. In order to reduce the gloss of the film, the commonly used matting agents include ultrafine silica, talc powder, aluminum stearate, calcium stearate, low molecular weight thermoplastic resin, etc. To obtain the extinction effect, the following methods can be used


1. The powder coatings with different curing speeds are mixed by dry mixing method, and the gloss of the obtained coating film is obviously decreased and plays a role of extinction.


Due to the rapid curing of the powder coating with high reactivity, the leveling and reaction of the resin with slow curing of the continuous phase are hindered, and the final cured film loses luster. Although this method is effective, it increases the manufacturing process and cost.



2. Add thermoplastic resin. The matting powder coating can be obtained by adding cellulose acetate to epoxy powder coating and adding fine powder low molecular weight polyethylene and polypropylene resin to polyester powder coating. The gloss of the coating film is affected by the manufacturing conditions. Because the addition of thermoplastic resin will affect the storage stability of the powder coating, the addition amount is limited to 2-3% of the resin amount.



3. Use special curing agent with extinction effect.


4. Add fillers with extinction effect. The addition of ultra-fine silica, talc and other fillers can significantly reduce the gloss. In particular, the particle size of the filler has a great influence on the gloss of the coating film. The larger the particle size, the lower the gloss. It should be noted that increasing the amount of filler will reduce the flatness and mechanical strength of the coating film. In the epoxy powder coating, the influence of calcium carbonate particle size on the gloss of the coating is shown in the table. Matting coatings can be obtained by adding ultrafine silica and kaolin to acrylic acid and polyester powder coatings. In addition, the addition of polyethylene wax, hydrogenated castor oil and other waxes can also obtain a matting coating.


Let's talk about its application again:

In recent years, China's coating industry has been in the ascendant, and the total output of coatings has also leaped to the forefront of the world, forming a related industrial group, actively promoting the technological revolution and development of the traditional coating field. During this period, the high gloss bright paint was loved by consumers for its bright color and brightness, and dominated the paint market for a long time.


With the continuous improvement of people's living standards, on the one hand, consumers feel that the reflection of high gloss bright paint after film formation is serious, which is harmful to people's eyes; On the other hand, consumers' aesthetic concepts are more and more inclined to leisure, fashion and individuality. Coupled with the booming demand of China's automobile and home appliance industries. These factors have led to a sharp increase in the demand for low gloss coatings with soft appearance. At the same time, how to produce coatings with extinction properties has become a problem that coating designers must consider.


Today's content is a little informative, but I hope you can read it patiently, understand it and add more knowledge. Finally, if you have any questions, please come to IOTA for consultation.