Heatproof powdery coating used for external surfaces of microwave oven bodies, and preparation method thereof

Abstract

The invention provides a heatproof powdery coating used for external surfaces of microwave oven bodies. The heatproof powdery coating is prepared from, by weight, 10-15 parts of organosilicone resin, 40-50 parts of polyester resin, 40-50 parts of epoxy resin, 1-2 parts of dicyandiamide, 1-1.5 parts of copper acetylacetonate, 5-8 parts of alundum powder, 0.1-0.3 parts of dibutyltin dilaurate, 2-3 parts of a coupling agent KH560, 1-2 parts of toluene diisocyanate, 15-20 parts of titanium dioxide, 1-2 parts of urotropine, 1-2 parts of zirconium silicate powder, 0.2-0.5 parts of benzoin, 0.3-0.5 parts of a leveling agent, 0.2-0.4 parts of a brightener, 8-10 parts of aluminum nitride powder, 8-10 parts of carbon black and 0.2-0.4 parts of modified negative ion powder. A film formed by coating the powdery coating has the advantages of high temperature resistance, corrosion resistance, good wear resistance, good weatherability, low solidification temperature, short solidification time, good levelability and strong adhesion, can purify air, and can be used on induction cookers, microwave ovens, ovens, radiators and other household electrical appliance products.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to a heat-resistant powder coating for the external surface of a microwave oven and a preparation method thereof. Background technique [0002] With the advancement of modern science and technology and the development of modern industry, the problem of environmental pollution has become increasingly prominent, which poses a great threat to human beings themselves and the environment on which human beings depend. Traditional coatings will produce a large amount of toxic and harmful waste gas and waste water during the manufacturing process or during the construction process, which will pollute the environment, air and water resources, especially solvent-based coatings, which will release Volatile organic compounds (VOC) into the atmosphere, its amount has reached more than 50%, causing serious secondary pollution. This problem has attracted the attention of many industrial countries. [000...

AI Technical Summary

Problems solved by technology

Although the existing high-temperature-resistant powder coatings are more environmentally friendly than oil-based coatings, their popularization is limited due to their high cost and high-temperature curing (curing conditions are at least 230°C×20 minutes)

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