Depending on the application sometimes semi-gloss or matte powder coating. To reduce the gloss coating, matting agents are commonly used fine silica, talc, stearic acid, aluminum stearate, calcium stearate, low molecular weight thermoplastic resin. To get matting effect, can be used the following methods:
a, the cured powder coating at different speeds, and mixed with a dry mixing method, the resulting coating film gloss decreased, play the role of extinction.
Since high reactivity rapidly solidified powder coatings, the slower the continuous phase of the resin curing reaction hindered leveling, the final cured coating loses luster. Although this method is effective, but increased manufacturing processes and costs.
b, add a thermoplastic resin.
Adding the epoxy powder coating of cellulose acetate, polyester powder coating is added in finely powdered low molecular weight polyethylene, a polypropylene resin can be obtained extinction powder coatings. Gloss coating as manufacturing conditions. Because the thermoplastic resin is added, will affect the storage stability of the powder coating, so the added amount is limited to 2-3% of the amount of resin.
c, with a special role of extinction curing agent.
d, added with a filler extinction effect.
Add ultrafine silica, talc and other fillers to make shiny decreased significantly. In particular filler particle size has a great influence on the film gloss. Larger the particle size, the lower gloss. It should be noted that increasing the amount of filler, causes the formation of a coating film and the mechanical strength. In epoxy powder coating, calcium carbonate particle size on the film gloss table. The acrylic, polyester powder coating superfine silica and kaolin coating can be obtained extinction. In addition, adding polyethylene wax, hydrogenated castor oil wax coating can be obtained extinction. Paint the light extinction principle and its application
In recent years, China's paint industry in the ascendant, paint production has also leapt to the forefront of the world, forming a group of related industries, and actively promote the technological revolution in the field of traditional painting and development. In the light of this high-gloss paint during its bright color, bright and so loved by consumers, and for a long period of time dominate the paint market. However, with the continuous improvement of people's living standards, while consumers feel the light of the high-gloss reflective coating film after more serious, harmful to the human eye; hand consumers increasingly prefer the aesthetic ideas of leisure, fashion and personalization. Coupled with China's automotive and appliance industries booming demand. These factors led to the appearance of the people to have a soft, low gloss coatings has increased dramatically. It also makes how to produce coatings having become Extinction Performance Coatings designers must consider.
