Preparation method of high-gloss extinction electrophoretic coating

Abstract

The invention relates to a preparation method of a high-gloss extinction electrophoretic coating comprising acrylic resin and amino resin; the mass ratio of acrylic resin to amino resin is 1 to (0.2-1), and the acrylic resin is prepared from the following raw materials in parts by mass: 3-4 parts of isooctyl methacrylate, 6-9 parts of n-butyl acrylate, 5-8 parts of methyl methacrylate, 1-3 parts of styrene, 2-4 parts of acrylic acid, 0.1-0.5 part of 2-hydroxyethyl methacrylate, 1-2 parts of 2-hydroxyethyl acrylate, 1-2 parts of 2-hydroxypropyl acrylate, 0.5-1 part of polycarbonate, 0.05-0.3 part of dinonylnaphthalene sulfonic acid, 0.5-1 part of a compound initiator, 1-2 parts of a neutralizer, 0.01-0.02 part of a defoamer, 8-15 parts of n-butanol, 8-15 parts of isopropanol and 10-50 partsof deionized water; the number-average molecular weight of the polycarbonate is 5000-10000. The finally prepared electrophoretic coating has good extinction effect (the gloss degree of greater than 70 degrees and less than 80 degrees is detected by a 60-degree gloss meter), and has no stratification phenomenon and good stability after being stored for one year or more; and a paint film is good insmoothness, strong in anti-pollution ability, easy to use and good in adhesive force to a used substrate.

Description

technical field [0001] The invention relates to a preparation method of a high-gloss matte electrophoretic coating, which belongs to the technical field of coatings. Background technique [0002] Electrophoresis is one of the most effective methods of coating metal workpieces. Electrophoretic coating is a new type of coating with low pollution, energy saving, resource saving and good corrosion resistance. It has the advantages of smooth coating film, good water resistance and chemical resistance, and it is easy to realize the mechanization and automation of the coating industry. It is suitable for the coating of workpieces with complex shapes, edges, corners, and holes. It is widely used in the coating of hardware such as automobiles, automatic vehicles, electromechanical appliances, and home appliances. [0003] In order to obtain a matting effect, one way is to add matting agents, such as silicon oxide, organic microparticles, etc., to the coating. However, the chemical ...

AI Technical Summary

Problems solved by technology

The existing electrophoretic coating, after adding matting agent, its gloss can reach low gloss (60 degree gloss meter measured less than or equal to 10 degrees), but its stability is poor, 3-5 months of storage will appear delamination phenomenon, and After use, the paint film is uneven and not delicate