Weather-resistant powder coating and preparation process thereof

Abstract

The invention discloses a weather-proof firing-resistant powder coating which comprises the following components in mass fraction: 15-30% of silicone resin, 10-20% of modified acrylic resin, 15-30% ofamorphous silicate, 5-15% of a phosphate compound, 5-15% of ultrafine silica, 2-10% of an environment-friendly high-temperature-resistant pigment, 0.1-0.5% of blocked isocyanate and 0.2-10% of an auxiliary agent. The invention also discloses a preparation process of the weather-proof firing-resistant powder coating. The powder coating provided by the invention has good weatherability and firing resistance, and can be widely applied to the fields of products such as barbecue ovens, fireplaces, chimneys and exhaust pipes.

Description

technical field [0001] The invention relates to a powder coating and a preparation process thereof, in particular to a weather-resistant open flame-resistant powder coating and a preparation process thereof. Background technique [0002] Powder coating is currently an environmentally friendly coating widely used in various industries for substrate or equipment surface coating. It has developed rapidly in recent years due to its advantages of economy, high efficiency, environmental protection and energy saving. Powder coatings do not contain solvents and are 100% solid powder coatings. They have the characteristics of no solvents, no pollution, saving energy and resources, reducing labor intensity and high mechanical strength of the coating film. They can be widely used in construction, automobiles, machinery, chemicals, energy and Electronic and electrical equipment and other fields. However, at present, the conventional application scenarios of powder coatings are generall...

AI Technical Summary

Problems solved by technology

However, at present, the conventional application scenarios of powder coatings are generally below 200°C. If the temperature exceeds 250°C, the organic components in the coating will begin to decompose rapidly, causing the coating to collapse and pulverize, making it impossible to continue to effectively protect the substrate. material

Although high-temperature-resistant paints can achieve stability at high temperatures, they have disadvantages such as high VOC emissions and complicated coating processes, so the voice of being replaced by powder coatings is getting higher and higher.

[0003] At present, high-temperature-resistant powder coatings mainly use silicone resin and epoxy resin as the main organic components. Due to the weather resistance of epoxy resin, they cannot be used outdoors, and the fields that are in demand in the market, such as ovens, exhaust pipes, etc. For long-term outdoor use, the research and development of weather-resistant powder coatings that are resistant to open flames has become the focus of attention

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