Solvent type low-VOC bus intermediate coat and preparation method thereof

Abstract

The invention discloses a solvent type low-VOC bus intermediate coat and a preparation method thereof. The solvent type low-VOC bus intermediate coat is composed of a component A and a component B which are equal in weight, wherein the component A is prepared from the following components in parts by weight: 30-40 parts of acrylic resin, 0.5-1 part of wetting dispersant, 0.5-1 part of anti-settling agent, 10-20 parts of talcum powder, 10-20 parts of barium sulfate, 20-30 parts of titanium dioxide, 2-5 parts of zinc stearate, 0.1-0.2 part of carbon black powder, 5-10 parts of butyl acetate, 5-10 parts of propylene glycol methyl ether acetate, 5-10 parts of DBE, 0.1-0.5 part of an acrylate leveling agent, 0.01-0.05 parts of a drier, and 0.1-0.2 parts of a composite coupling agent; and the component B is prepared from the following components in parts by weight: 50-70 parts of isocyanate, 10-30 parts of butyl acetate and 10-20 parts of DBE. The invention further provides a preparation method of the solvent type low-VOC bus intermediate coating. The solvent type low-VOC bus intermediate coating provided by the invention has very low VOC content and viscosity, and also has very good adhesive force and flexibility.

Description

technical field [0001] The invention relates to a solvent-based low-VOC bus intermediate paint, in particular to a solvent-based low-VOC bus intermediate paint and a preparation method thereof, belonging to the technical field of bus intermediate paint. Background technique [0002] With the rapid development of the automobile industry, automotive coatings have played a pivotal role in the development of industrial coatings in China, accounting for 15-20% of the total output of coatings. Most of the current automotive coatings are multi-layer coatings. As the main part of automotive paints-body coatings generally include primer, intermediate coats and topcoats. This system can basically meet many requirements of automotive coatings. . The intermediate paint is the paint between the base coat and the top coat layer, and the intermediate paint is almost always used in the mid-to-high-end cars and buses with high decoration requirements. The base material used in the intermed...

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Problems solved by technology

[0003] At the same time, the inventors found that the traditional coatings have high viscosity, and thinners need to be added during the construction of the paint, so the VOC content cannot be reduced, and the compatibility and bonding strength between the components are poor.

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