Water-based environment-friendly finishing paint and preparation method thereof

Abstract

The invention discloses a water-based environment-friendly finishing paint, which is prepared from the following compositions in part by weight: 20 to 70 parts of water borne acrylic resin solution of which the solid content is 30 to 80 percent and/or 20 to 70 parts of water borne epoxy resin solution of which the solid content is 30 to 80 percent, 4 to 10 parts of water borne amino resin solution of which the solid content is 60 to 98 percent; 1 to 5 parts of organic amine, 0.2 to 2 parts of wetting and leveling agent, 0.2 to 2 parts of thickener, 0.1 to 0.8 part of defoaming agent, 1 to 5 parts of adhesion promoter, 0.2 to 5 parts of catalyst, 10 to 30 parts of alcohol diluting solvent and/or 1 to 5 parts of nontoxic ether diluting solvent, and 20 to 50 parts of deionized water, wherein the catalyst is one or more of ammonias, alcohols and benzenesulfonic acids. The water-based environment-friendly finishing paint has the advantages of wide applicable range, high hardness, good flexibility, strong adhesion, good scratchproof performance, and environmental protection. Simultaneously, the invention also discloses a method for preparing the water-based environment-friendly finishing paint.

Description

technical field [0001] The invention relates to a coating composition of an organic polymer compound, in particular to a water-based baking finish paint and a transparent color paint. Background technique [0002] With the continuous improvement of people's material living standards, varnishes have been widely used in various products (such as automobiles, plastics, and glass products) to improve the appearance of products and protect the primer. Existing water varnishes are mainly composed of resin film formers and solvents. Film formers are generally formed by cross-linking and curing polyester resins or acrylic resins and amino resins. Acrylic resins are widely used for their better weather resistance; solvents Generally, it is a volatile organic solvent, such as Chinese patent CN200610161112. The existing varnishes mainly have the following disadvantages: [0003] (1) Most of them can only be used on rough metal surfaces, and are difficult to adhere to plastic (ABS, PA...

AI Technical Summary

Problems solved by technology

[0003] (1) Most of them can only be used on rough metal surfaces, and are difficult to adhere to plastic (ABS, PA, PB, PP, PC, PVC, etc.), glass and metal alloy substrates with smooth surfaces;

[0004] (2) It is difficult to balance the hardness and toughness of the paint film, the hardness is difficult to break through 3H, and the toughness is also difficult to break through 1;

[0005] (3) The paint film has poor scratch resistance;

[0006] (4) The paint film has poor solvent resistance, water boiling resistance and human sweat resistance;

[0007] (5) Most of the solvents are poisonous and volatilize in the air to pollute the air and damage human health;

[0008] (6) Spraying construction is difficult (under wet film state, repeated construction is not allowed);

[0009] (7) The surface is prone to pinholes and fish eyes, and the smoothness is poor;

[0010] (8) The cost performance is low, so that the production cost remains high, making promotion, sales and market acceptance difficult

[0011] In short, the current varnish has the problems of small application range, poor anti-scratch performance, not environmental protection and high cost