Water-based metallic paint and preparation method thereof

Abstract

The invention relates to the technical field of metallic paint and in particular relates to water-based metallic paint and a preparation method thereof. The water-based metallic paint comprises a component A and a component B, wherein a molar ratio of -NCO in the component A and -OH in the component B is (1.0-1.2):1; the component A is an isocyanate curing agent; the component B comprises hydroxyacrylic resins, self-assembled corrosion inhibition microspheres, a dispersing agent, a flatting agent, an antifoaming agent and deionized water; the self-assembled corrosion inhibition microspheres are microspheres of the core-shell structure; the core refers to nano-crystalline cellulose attached to a corrosion inhibitor; the shell is a polymer electrolyte membrane. According to the water-basedmetallic paint disclosed by the invention, the nano-crystalline cellulose serves as a slow release carrier of the corrosion inhibitor, so that long-term release of the corrosion inhibitor is realized;the self-assembled corrosion inhibition microspheres are endowed with controlled release with an irritating effect by the polymer electrolyte membrane, so the continuous corrosion prevention effect of the coating is enhanced; in addition, the nano-crystalline cellulose has the characteristics of excellent transparency, heat resistance and high strength, the water-based metallic paint has transparency, and the strength of the paint can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of metallic paint, in particular to a water-based metallic paint and a preparation method thereof. Background technique [0002] With the continuous development of society, the output of coatings is getting bigger and bigger, and the application is getting wider and wider. Traditional coatings (paints) and adhesives contain a large amount of organic solvents. After construction, a large amount of organic volatiles such as aromatic hydrocarbons, esters, and ketones enter the atmosphere, which not only wastes precious resources, but also endangers human health. According to statistics, the annual output of domestic coatings is about 16 million tons, and the annual emission of VOC (volatile organic compounds) to the atmosphere is about 5 million tons. [0003] Therefore, domestic environmental protection laws and regulations are increasingly strengthened. Many provinces and cities have issued policies and regu...

AI Technical Summary

Problems solved by technology

However, the nanocapsules with silica as the capsule material have poor compatibility with the film-forming resin, resulting in a reduction in the adhesion and strength of the coating film; The film resin has good compatibility, but the properties of nano-microcapsules and film-forming resin are relatively close, the modification effect is not strong, and the synthesis steps of polymer resin microspheres are cumbersome, which is not conducive to industrial production

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