Automobile metal sparkling paint and preparation method thereof

Abstract

The water-thinned flash paint consists of water dispersible acrylic resin, deionized water, water-thinned curing cross-linking agent, water dispersible aluminum powder, dispersant, carboxymethyl butyl acetate resin fiber and water thinned assistant. The water dispersible acrylic resin is prepared with monomer mixture of methyl methacrylate, styrene, butyl acrylate, methacrylic acid, ethoxy methacrylate and acetyl acetoxy methacrylate, and through free radical polymerization. The water-thinned flash paint has regularly arranged water dispersible aluminum powder, and can form paint film with high flash number, great adhesion of metal grain, high water tolerance, etc.

Description

technical field [0001] The invention relates to a water-based metallic glitter paint, in particular to a metallic glitter paint of a water-dispersed acrylic resin with a chelating group acetoacetoxy group, and also relates to a preparation method of the metallic glitter paint. Background technique [0002] At present, the metallic flash paint used in the domestic automobile coating industry is generally a solvent-based metallic flash paint, and its organic solvent content is as high as 85%, and the construction solid content is only about 15%, accounting for the volatile organic compounds (VOC) About 50% of the total emissions, is the largest source of VOC emissions in the automotive painting industry. Organic solvents seriously pollute the production environment and the atmospheric environment, and pose a great hazard to human health. Solvent-based coatings also have potential safety hazards such as toxicity, flammability, and explosion during production, storage, and use....

AI Technical Summary

Problems solved by technology

In the presence of water, the carboxyl groups are easy to ionize the atoms on the surface of the metal particles, and the multivalent metal ions can form multivalent metal carboxylates with the carboxyl groups on different molecular chains at the same time to form ionic cross-linking bonds, which makes the resin molecular chains easy to condense, resulting in metal Glitter paint is unstable

Due to the above two reasons, there are defects such as sagging, shrinkage, pinholes and other defects in the construction performance of metallic flash paint, and the arrangement of metal particles is irregular during film formation, which seriously affects the appearance of metallic flash paint film.

Secondly, the carboxyl group also acts as a cross-linking reaction with the curing agent to cure the coating film, while the carboxyl group that forms a salt with polyvalent metal ions cannot undergo a cross-linking reaction with the curing agent, resulting in a decrease in the degree of cross-linking of the paint film. The cross-links are not water-resistant, thus reducing the water resistance, salt spray resistance and other physical and mechanical properties of the paint film