High-gloss cathodic electrophoretic paint and preparation method thereof

Abstract

The invention relates to high-gloss cathodic electrophoretic paint and a preparation method thereof. The paint comprises emulsion and a color paste; the mass percent of the emulsion is 36 to 40 percent; and the mass percent of the color paste is 5 to 6 percent. The formula of the emulsion takes the mass percent as the unit and comprises 20 to 60 percent of amine modified epoxy resin, 5 to 20 percent of isocyanate sealing element, 30 to 60 percent of deionized water, 0.3 to 0.6 percent of emulsifying agent and 0.3 to 0.6 percent of formic acid. The color paste comprises 10 to 40 percent of quaternary ammonium salt dispersion resin, 35 to 45 percent of deionized water, 5 to 8 percent of dibutyl tin oxide, 10 to 20 percent of kaolin, 5 to 15 percent of carbon black and 2 to 5 percent of emulsifying agent. The method comprises the following step of: after mixing the color paste, the emulsion and the deionized water according to the proportion of 1:7:11, carrying out electrophoresis coating for 3 to 4min at the construction voltage of 200V after curing for 48 to 50h at the temperature of 28 to 30 DEG C. The invention has scientific and reasonable mixture ratio, high gloss of a coated film, good decoration property, high safety and environmental protection.

Description

technical field [0001] The invention relates to a coating, in particular to a high-gloss cathodic electrophoretic coating capable of forming a high-gloss coating film on the surface of a metal substrate and a preparation method thereof. Background technique [0002] Cathodic electrophoretic coatings are widely used, and the proportion is mainly epoxy resin as the main film-forming substance, which has good corrosion resistance. [0003] However, the cathodic electrophoretic coatings of the above-mentioned prior art have the following disadvantages: due to poor wettability to pigments, common cathodic electrophoretic coatings have low gloss and poor decoration, and are only used as primers. Contents of the invention [0004] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a high-gloss cathodic electrophoretic coating with strong corrosion resistance, high coating gloss and good decoration and a preparation method thereof. ...

AI Technical Summary

Problems solved by technology

[0003] But the cathodic electrophoretic paint of above-mentioned prior art has the following deficiencies: due to the relatively poor wettability to pigment, common cathodic electrophoretic coating film gloss is low, and decoration is poor, only uses as primer