Two-component waterborne epoxy silver powder paint as well as preparation method and application thereof

Abstract

The invention relates to two-component waterborne epoxy silver powder paint as well as a preparation method and application thereof, and belongs to the technical field of environment-friendly waterborne paint. The two-component waterborne epoxy silver powder paint comprises a main agent and a curing agent, the main agent comprises the following components in percentage by weight: 40-70% of waterborne epoxy resin dispersion, 4-8% of liquid epoxy resin, 2-6% of anti-sagging resin, 10-20% of lithium magnesium sodium silicate solution, passivated aluminum silver paste and 0.5-6% of auxiliaries; the curing agent comprises the following components in percentage by weight: 40-60% of aliphatic amine adduct, 3-5% of cosolvent, 0.3-3% of assistant and the balance of deionized water. The two-component epoxy water-based silver powder paint has the following advantages of being good in stability and weather resistance, low in VOC content, free of pungent smell, low in price and wide in application range; the curing agent has moderate viscosity after being treated, is bubble-free after being stirred at high speed and can be instantly packaged; the main agent and the curing agent are good in mixing compatibility, better in constructability, long in activation period, good in sagging resistance, high in gloss and good in weather resistance and salt fog 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

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