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Principle and application of matting powder
time：2024-06-04
Depending on the application, sometimes semi-light or matte powder coating is required. In order to reduce the gloss of the film, the commonly used matting agents are ultrafine silica, talc powder, aluminum stearate, calcium stearate, low molecular weight thermoplastic resin and so on. To get the extinction effect, you can use the following methods:
A. Powder coatings with different curing rates are mixed by dry mixing method, then the luster of the resulting film is significantly reduced and plays a matting role.
Due to the rapid curing of powder coatings with high reactivity, the flow reaction of resin with slow curing in continuous phase is hindered, and the final curing film loses its luster. Although this method is effective, it increases the manufacturing process and cost.
b, add thermoplastic resin.
By adding cellulose acetate to epoxy powder coating and fine powder-like low molecular weight polyethylene and polypropylene resin to polyester powder coating, the dull powder coating can be obtained. The gloss of the film is affected by the manufacturing conditions. Because the addition of thermoplastic resin will affect the storage stability of powder coating, the addition amount is limited to 2-3% of the resin amount.
c, use a special curing agent with extinction effect.
d, add a matting filler.
Adding ultrafine silica, talc powder and other fillers can significantly reduce the luster. In particular, the particle size of the filler has a great influence on the gloss of the 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 film. In epoxy powder coatings, the effect 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 and polyester powder coatings. In addition, the addition of polyethylene paraffin wax, hydrogenated castor oil and other wax can also be obtained. Coating extinction principle and its application
In recent years, China's paint industry is in the ascendant, and the total output of paint has also jumped to the forefront of the world, forming a related industrial group, and actively promoting the technical revolution and development of the traditional painting field. During this period, high-gloss gloss coatings with its bright color, bright and other advantages are deeply loved by consumers, and dominated the paint market for a long time. However, with the continuous improvement of people's living standards, on the one hand, consumers feel that high-gloss gloss coating film reflection is more serious, harmful to people's eyes; On the other hand, consumers' aesthetic concept is more and more inclined to leisure, fashion and individuation. 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 a soft appearance. At the same time, it also makes how to produce coating with extinction performance become a problem that coating designers must consider.
A. Powder coatings with different curing rates are mixed by dry mixing method, then the luster of the resulting film is significantly reduced and plays a matting role.
Due to the rapid curing of powder coatings with high reactivity, the flow reaction of resin with slow curing in continuous phase is hindered, and the final curing film loses its luster. Although this method is effective, it increases the manufacturing process and cost.
b, add thermoplastic resin.
By adding cellulose acetate to epoxy powder coating and fine powder-like low molecular weight polyethylene and polypropylene resin to polyester powder coating, the dull powder coating can be obtained. The gloss of the film is affected by the manufacturing conditions. Because the addition of thermoplastic resin will affect the storage stability of powder coating, the addition amount is limited to 2-3% of the resin amount.
c, use a special curing agent with extinction effect.
d, add a matting filler.
Adding ultrafine silica, talc powder and other fillers can significantly reduce the luster. In particular, the particle size of the filler has a great influence on the gloss of the 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 film. In epoxy powder coatings, the effect 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 and polyester powder coatings. In addition, the addition of polyethylene paraffin wax, hydrogenated castor oil and other wax can also be obtained. Coating extinction principle and its application
In recent years, China's paint industry is in the ascendant, and the total output of paint has also jumped to the forefront of the world, forming a related industrial group, and actively promoting the technical revolution and development of the traditional painting field. During this period, high-gloss gloss coatings with its bright color, bright and other advantages are deeply loved by consumers, and dominated the paint market for a long time. However, with the continuous improvement of people's living standards, on the one hand, consumers feel that high-gloss gloss coating film reflection is more serious, harmful to people's eyes; On the other hand, consumers' aesthetic concept is more and more inclined to leisure, fashion and individuation. 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 a soft appearance. At the same time, it also makes how to produce coating with extinction performance become a problem that coating designers must consider.
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