High-solid content and high-gloss anode electrophoretic coating and coating method thereof

Abstract

The invention relates to a high-solid content and high-gloss anode electrophoretic coating which comprises the following components: an acrylic resin modified by glycidyl tertiary carboxylic ester, an amino resin of methyl-butyl compound ether and a catalyst, wherein the mass ratio of the acrylic resin modified by glycidyl tertiary carboxylic ester to the amino resin of methyl-butyl compound ether is 1 to (0.2-1). Compared with a common anode electrophoretic coating, the solid content of the high-solid content and high-gloss anode electrophoretic coating is increased by 60% to 70%, and the solvent content of the high-solid content and high-gloss anode electrophoretic coating is reduced by 5% to 25%. Thus, the high-solid content and high-gloss anode electrophoretic coating can be easily prepared into a high environment-friendly coating and is low in viscosity, thereby bringing convenience for construction operations. According to the high-solid content and high-gloss anode electrophoretic coating and a coating method thereof, the gloss of a coating layer is improved by 90% to 120%; the coating layer is good in levelling property and plumpness, attractive in appearance and excellent in decorative effect; in addition, the coating layer is good in acid resistance, i.e., the coating layer can resist sulfuric acid or 5% hydrochloric acid for 48 hours; and the coating layer is excellent in outdoor weatherability, i.e., the artificial accelerated aging time of the coating layer reaches above 1000 hours.

Description

technical field [0001] The invention relates to an electrophoretic paint and a coating method, in particular to an anodic electrophoretic paint with high solid content and high gloss and a coating method. Background technique [0002] Electrophoresis is one of the most effective methods of coating metal workpieces. Electrophoretic coating is to immerse the conductive coated object in a low-concentration swimming paint tank filled with water as an anode or cathode, and set a corresponding cathode or anode in the tank, and connect a direct current between the two poles. After a period of time, a special coating method that deposits a uniform, fine, water-insoluble coating film on the surface of the object to be coated. As a new type of low-pollution, energy-saving, resource-saving, protective and anti-corrosion coating, electrophoretic coating has the characteristics of smooth coating film, good water resistance and chemical resistance, and it is easy to realize the mechan...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a high-solid high-gloss anodic electrophoretic coating and a coating method to solve the problem that the existing electrophoretic coating has low solid content, too much solvent content, and unsatisfactory viscosity, which is not convenient for construction operations, and the coating is difficult. Gloss, leveling, fullness, appearance, and decoration are not good, and the acid resistance, outdoor weather resistance, and artificial accelerated aging of the coating also need to be improved.