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Application of Inorganic Pigments in Powder Coatings

Application of Inorganic Pigments in Powder Coatings

(Summary description)There are various kinds of pigments for powder coatings, which can be mainly divided into inorganic pigments and organic pigments. Due to the particularity

Application of Inorganic Pigments in Powder Coatings

(Summary description)There are various kinds of pigments for powder coatings, which can be mainly divided into inorganic pigments and organic pigments. Due to the particularity

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There are various kinds of pigments for powder coatings, which can be mainly divided into inorganic pigments and organic pigments. Due to the particularity of powder coatings, the selection range of pigments for powder coatings is narrower than that used for solvent-based and water-based coatings. The following combines powder coatings for pigments Let's talk about the application of inorganic pigments in powder coatings.

1. Pigments for powder coatings cannot chemically react with components such as resins, curing agents, fillers, and additives during the process of melting and extrusion, or during baking and curing, and thermal decomposition or product shape changes will cause color changes. Therefore, the heat-resistant temperature of the pigments used in powder coatings is at least above 200 ° C, and it will not fade for 15 minutes.

2. Powder coatings should be non-toxic and environmentally friendly pigments as environmentally friendly coatings. Especially when powder coatings are applied to articles that come into contact with the human body, pigments containing toxic heavy metals such as lead, cadmium, mercury, and hexavalent chromium should not be used.

3. The pigments for powder coatings and the coloring resin must have good compatibility and matching, and the dispersion must be good in order to obtain the ideal coloring effect.

4. The weather resistance, light resistance and chemical stability of the pigments used in powder coatings are better, and they are not affected by air, light, humidity and environment. After the powder film is formed, it is not easy to be affected by chemicals such as acids, alkalis, salts and solvents.

5. Powder coatings require pigments with strong tinting power, decolorizing power and hiding power. This is beneficial to reduce the amount used in the formulation, and can also reduce the cost of the coating. Due to the limitations of factors such as high curing temperature and pigment volume concentration, powder coatings are used

Pigment selection is critical. Inorganic pigments generally have good heat resistance, and most of them can withstand temperatures up to 1000°C.

Above: strong chemical inertness, strong pigment hiding power, relatively stable color; good light resistance and weather resistance. Combined with the above-mentioned temperature resistance requirements, fastness requirements and safety requirements for pigments of powder coatings, inorganic pigments are more suitable for coloring powder coatings than organic pigments and other pigments.

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Copyright © Hunan Noli Enamel Co., Ltd.    
湘ICP备17005568号-1      www.300.cn