Water-based two-component epoxy primer-topcoat paint

Abstract

The invention provides a water-based two-component epoxy primer-topcoat paint. The paint is prepared by mixing a component A with a component B, the component A comprises 55-75 parts of a water-basedepoxy emulsion, 0.2-0.4 part of a dispersant, 0.1-0.2 part of a wetting agent, 0.1-0.2 part of an antifoaming agent, 0.4-0.6 part of a thickening agent, 0.1-0.2 part of an anti-settling agent, 8-25 parts of precipitated barium sulfate, 4-9 parts of calcium carbonate, 3-20 parts of a pigment, 4-6 parts of an antirust pigment, 0.1-0.2 part of a substrate wetting agent, 0.1-0.2 part of an anticorrosive agent, 0.1-0.2 part of a mildew-proof bactericide and 1-10 parts of deionized water; and the component B comprises 45-55 parts of a modified amine epoxy curing agent, 0.1-0.5 part of fatty alcoholpolyoxyethylene ether phosphate and 49.5-49.9 parts of deionized water. The paint of the invention can achieve excellent film forming effect and paint film performances without using any cosolvent, and basically contains zero VOC.

Description

technical field [0001] The invention provides a water-based two-component epoxy primer and surface-in-one paint and a preparation method thereof, belonging to the technical field of paints. Background technique [0002] As the country pays more and more attention to environmental protection and people's awareness of environmental protection continues to increase, water-based coatings have become an important direction and research focus for the development of coatings. There are many kinds of epoxy resins with excellent specific properties, and are widely used in the production of coatings. Water-based epoxy coatings have many advantages of solvent-based epoxy coatings: excellent adhesion to various substrates, excellent corrosion resistance and chemical resistance of the cured coating film, small shrinkage of the coating film, high hardness, and wear resistance Model, excellent electrical insulation performance; also has low organic solvent or VOC content, will not cause a...

AI Technical Summary

Problems solved by technology

[0003] However, in order to meet the construction performance of the current water-based two-component epoxy coatings, some co-solvents must be added to improve the construction performance of the coatings, so the water-based two-component epoxy coatings have more or less unpleasant temperatures.

[0004] Chinese patent "CN2017101339202 A Waterborne Acrylic Modified Two-Component Epoxy Undercoating Paint" provides a waterborne acrylic modified two-component epoxy undercoating paint and its preparation method. In this patent, acrylic acid and epoxy The grafting technology introduces acrylate monomers into the epoxy resin, so that both anti-corrosion and weather resistance are available. It is suitable for anti-corrosion paints for single-coat bottom and surface integration. Paint can not take into account the problem of corrosion resistance and weather resistance

However, a small amount of environmentally friendly solvents are still added in this patent. Although the patent claims that the VOC content is extremely low, <50g / L, there is still a large gap from the goal of zero VOC

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