High solid coating for container and preparation method of high solid coating

Abstract

The invention discloses a high solid coating for a container and a preparation method of the high solid coating, and relates to the field of the coating chemical industry. The high solid coating comprises a host and a curing agent; the mass ratio of the host to the curing agent is 4:1; the host comprises the following components by mass: 40-60 percent of high solid low viscosity hydroxy acrylic resin, 1-5 percent of a rheological agent, 1-10 percent of a functional pigment, 20-25 percent of a sunproof pigment, 0-1 percent of an antifoaming agent, 1-3 percent of a wetting dispersant, 0.1-0.5 percent of a flatting agent I, 0.1-0.5 percent of a flatting agent II, 1-10 percent of a reactive diluent, 0.1-5 percent of a drier, and 1-5 percent of a mixed solvent. The coating has the advantages that the content of volatile organic compounds is low, the one-step film formation thickness is 150 microns, the surface dry purpose is achieved within 15 min, the film abrasion resistance is low to 40 mg, the coating is saved, the emission and coating time of volatile organic compounds are reduced, and the corrosion resistance, the abrasion resistance and the weathering resistance meet the requirement for anticorrosion outside the container, and adapt to the rapid production requirement of the container production line.

Description

Technical field [0001] The invention relates to the field of paint chemistry industry, in particular to a high-solid paint for containers and a preparation method thereof. Background technique [0002] It is well known that China’s container production capacity ranks first in the world. More than 95% of the world’s new containers are produced in China every year. As a supporting product for containers, container coatings must not only meet its functional requirements, but also match the production level of containers. In the course of operation, it is often exposed to complex environments such as strong sunlight, humidity, and seawater outdoors, and needs to withstand collision and friction during storage and transportation. Therefore, container coatings should have excellent corrosion resistance, high temperature and humidity resistance, and weather resistance. Resistance and wear resistance; the current mainstream supporting system for container exterior anti-corrosion is 2 coa...

AI Technical Summary

Problems solved by technology

The VOC content of water-based container coatings is low during the construction process, but the drying speed of the coating film is slow. On the one hand, forced drying increases equipment costs and energy consumption; high-solid container coatings are also environmentally friendly coatings, high-solid epoxy High-build primer has high film thickness at one time, fast drying speed, good adhesion to metal substrates, and excellent corrosion resistance. Many foreign well-known coating companies have launched related varieties, and epoxy high-build primer has been used in container production. application, but the matching topcoat still adopts traditional acrylic polyurethane topcoat. Chinese patent CN103194145A discloses a high-solid paint and its preparation method. As the main raw material, a high-solid acrylic polyurethane coating was prepared. The coating has good anti-corrosion and decorative properties, but its abrasion resistance, high temperature and high humidity resistance, dry film thickness and drying speed of one-time construction cannot meet the special requirements for containers. Coating Performance Requirements

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