A kind of two-component waterborne epoxy silver powder paint and its preparation method and application

Abstract

The invention relates to a two-component water-based epoxy silver powder paint and its preparation method and application, belonging to the technical field of environmental-friendly water-based paint. The two-component water-based epoxy silver powder paint of the present invention includes a main agent and a curing agent, wherein the main agent includes the following components in percentage by weight: 40-70% of water-based epoxy resin dispersion, 4-8% of liquid epoxy resin , anti-sagging resin 2-6%, sodium lithium magnesium silicate solution 10-20%, passivation aluminum silver paste, additive 0.5-6%; curing agent includes the following components in weight percentage: fatty amine adduct 40 % to 60%, cosolvent 3 to 5%, additives 0.3% to 3%, and the balance is deionized water. The two-component epoxy water-based silver powder paint of the present invention has the following advantages: good stability and weather resistance, low VOC content, no irritating odor, low price, and wide application range; moderate viscosity after curing agent treatment, high-speed stirring without foaming, can Immediate packaging; good mixing compatibility between main agent and curing agent, better workability, long pot life, good sag resistance, high gloss, good weather resistance and salt spray resistance.

Description

technical field [0001] The invention relates to a two-component epoxy water-based silver powder paint and its preparation method and application, belonging to the technical field of water-based paint. Background technique [0002] Two-component epoxy has the advantages of strong adhesion, excellent anti-corrosion performance, good water resistance, and high hardness. It is widely used in the fields of containers, construction machinery, rail transit, and auto parts. The development of epoxy coatings has received more and more attention. But currently on the market, solvent-based two-component epoxy coatings are widely used. With the enhancement of people's awareness of environmental protection and the drive of national policies, water-based coatings are welcomed by the market due to their low VOC content, high flash point and low odor. The research and development of a water-based epoxy coating with good construction and excellent performance is the top priority at present...

AI Technical Summary

Problems solved by technology

Chinese invention CN101289581 discloses a preparation method of polystyrene resin-coated aluminum-silver paste. The method of in-situ polymerization is used to coat the surface of aluminum-silver paste with a uniform, dense and transparent polystyrene resin layer. After coating, the aluminum-silver paste The gloss is good and the adhesion is improved; but the polystyrene resin and aluminum silver paste are unstable under high shear, which will cause the polystyrene resin layer to fall off from the surface of the aluminum silver paste and lose its protective effect

Patent CN101760071 discloses a method of using aluminum pigments for solvent-based resins in water-based paints, mainly using epoxy phosphate resins containing phosphate groups and hydroxyl groups to treat oily aluminum-silver paste, and the process is simple , and the storage stability has been improved; but the number average molecular mass control range of the epoxy phosphate used is 1500-3000, the molecular weight is small, the ability to hinder the diffusion of water molecules is weak, and the weather resistance of the epoxy phosphate is poor

Images