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Application of silicone in coatings (II)

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3 Heat-resistant coatings
Since the main chain of silicone polymer is a SI-O-SI-O bond and the side group is an organic group, it has the characteristics of both inorganic and organic substances, and its high temperature resistance is better than most organic resins.
The heat resistance of resins used for coatings decreases in the following order: pure silicone resin> organic resin modified silicone resin> silicone modified organic resin> styrene-free acrylic resin/polycarboxylic acid resin> polyester/isocyanuric acid triglycidyl ester> epoxy/carboxyl polyester> acrylic acid/isocyanate> polyester/isocyanate> epoxy/phenolic acid> epoxy/dicyandiamide> epoxy/amine, so silicone resin is the main film-forming substance for heat-resistant coatings. High temperature resistant coatings generally use high temperature resistant inorganic pigments and fillers


4Industrial maintenance coatings
Industrial maintenance coatings are mainly used in industrial anti-corrosion, home appliances, ship water parts, furniture and coiled materials. . Introducing silicone into organic resins is a good way to extend the life of coatings.
Through calculation, it is found that the total cost of coating construction = additional cost (production downtime cost + surface treatment cost + coating labor cost + waste treatment cost) + coating cost.


5Sanitary coating
Food hygiene is essential for human health. Coatings that meet hygiene standards are required in health care and food processing equipment. The method to meet the hygiene standards is either frequent cleaning or active sterilization of the coating surface.
my country's silicone food coatings have been developed in the 1980s, and the hygiene standard for silicone anti-stick coatings for food containers GB/T 11676-1989 has been formulated. It is suitable for silicone anti-stick coatings (such as silicone glaze) composed of hydroxyl-containing polymethylsiloxane and polymethylphenylsiloxane, which are applied on metal surfaces such as aluminum plates and tinplates. After natural volatilization and high-temperature baking and curing into films, they are used as anti-stick coatings for food molds.


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