Preparation method of high-solid acrylic polyurethane coating

Abstract

The invention provides a preparation method of a high-solid acrylic polyurethane coating. According to the invention, acrylic acid is adopted as a monomer; a tert-amyl peroxide is adopted as an initiator; and with a chain transfer agent and glycidyl neodecanoate, high-solid-content low-viscosity hydroxy acrylic resin is prepared. An optimal process comprises the following points: a reaction temperature is 140 DEG C; a monomer dosing time is 4.5h; the amount of the tert-amyl peroxide initiator is 2.5% of the total amount of the monomer; the amount of the chain transfer agent is 3% of the total amount of the monomer; xylene and butyl acetate are adopted as a synthetic solvent; the addition amount of glycidyl neodecanoate is 20% of the total amount of the monomer. The synthesized high-solid acrylic resin is adopted as a base material; polyurethane is prepared according to that the ratio of isocyanato content in isocyanate to hydroxy content in an N-3390 curing agent from Germany is 5:1; polyurethane is added into the base material, such that a high-solid acrylic polyurethane automotive finish paint is obtained. The method is environment-friendly, and has a low preparation cost.

Description

Technical field [0001] The present invention involves the preparation of a high -solid -linsel -split acrylic polyurethane coating, which greatly reduces production costs. The use of appropriate cause and chain rotor to improve the problem of curing acrylic lipids, which is the field of high molecular materials. Background technique [0002] The amount of coatings has developed rapidly in our country, but most of the coatings are unreasonable materials. The discharge of organic volatiles in the coatings is the main source of environmental pollution. According to statisticsThe coatings are discharged into the atmosphere. These organic volatile compounds not only destroy the earth's atmosphere and ecological environment that humans live, but also cause damage to the health of human beings.For example, coatings of acrylic resin. [0003] The present invention uses high-solid split acrylic resin as a base material, and then adds polyurethane to the medium hydroxyl content ratio of th...

AI Technical Summary

Problems solved by technology

[0002] The amount of coatings is developing rapidly in our country, but most of the coatings are environmentally unfriendly materials. The emission of organic volatiles in coatings is the main source of environmental pollution from coatings. According to statistics, millions of tons of solvents are discharged from the world every year. These organic volatile compounds not only destroy the earth's atmosphere and ecological environment on which human beings depend, but also cause harm to human health. Therefore, now we are vigorously developing low-energy, low-pollution and environmentally friendly coatings. paints such as acrylic resins

Images