Preparation method for aqueous low-solar-absorptance antistatic coating

Abstract

The invention relates to a preparation method for a aqueous low-solar-absorptance antistatic coating. The method comprises: (1) preparing a pigment slurry from 15-30 parts of deionized water, 0.1-0.8 part of a neutralizer, 0.2-2 parts of a thickening agent, 0.5-3 parts of a wetting dispersant, 0.1-1 part of a surfactant, 0.1-2 parts of an antifoaming agent, 0.1-0.5 part of an antiseptic and 1-10 parts of a pigment, stirring at a speed of 2000-3000 r / min for 20-30 min to uniformly disperse; (2) adding 30-50 parts of aqueous hydroxyl resin, 25-50 parts of a conductive filling material, 0.1-1 part of an antifoaming agent and 0.2-1.5 parts of a rheological modifier into the pigment slurry and stirring uniformly; (3) performing high-speed dispsersion on the paint slurry for 20-40 min, and controlling the dispersion speed to be 1500-2500 r / min; (4) adding 10-20 parts by mass of aliphatic isocyanate or alicyclic isocyanate; and (5) performing multiple times of spraying, controlling the spraying thickness at every spraying time to be 10-25 mu m and controlling the total thickness of the coating to be 80-150 mu m. The method helps to improve the environment protection performance of the product. The prepared coating has high infrared emissing ability and low solar absorptance, and also possesses excellent antistatic performance, salt-spray resistance, damp heat resistance and ageing resistance.

Description

technical field [0001] The invention relates to a preparation method of a water-based low solar absorption ratio antistatic coating and a low solar absorption ratio antistatic coating formed by the coating, belonging to the technical field of functional coatings. Background technique [0002] With the advancement of science and technology and economic development, people's awareness of environmental protection is increasing day by day, environmental protection laws and regulations are becoming more and more perfect, saving money and energy, and protecting the environment have become the main problems faced by the global coatings industry. Emissions of volatile organic compounds (VOC), such as EU Directive.99 / 13 / CE regulation, US CAAA (Clean Air Act Amendment, 1990), my country has also introduced a series of regulations to limit the emission of harmful substances in paint. Compared with traditional solvent-based coatings, water-based coatings use water as the dispersion mediu...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art and provide a method for preparing a water-based low solar absorption ratio antistatic coating. The water-based antistatic coating prepared by the method can replace the solvent-based coating and improve the environmental protection of the product. At the same time, it overcomes the problem of poor thermal control performance of traditional antistatic coatings. The prepared coating has high infrared emissivity and low solar absorption ratio, and has excellent antistatic, salt spray resistance, heat and humidity resistance and aging resistance.

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