Double-component aqueous epoxy coating

Abstract

The invention relates to a hydrophilic epoxy coating with double components containing component A: hydrophilic amine-epoxy addition compound 30-50%, color 20-40%,filler 0-15%, inhibitor 0-1%, dispersant 0.1-1%,water without ion 15-30%,and dissolving assistant 1-8%; component B:shrinked glycerol ether of double phenol A 70-85%;hydrophilic amine-epoxy addition compound 5-12%;polyphenol 5-10%;catalyst 0.01-1%. The compoment an and B are mixed by the mass ratio of 2.0-3.33:hydrophilic epoxy, the hydrophilic amine-epoxy addition compound is prepared by alkene group polyamine 15-20%,epoxide 5-12%,glycerol ether of double phenol A 20-30%,acetic acid 1-8%,dissolving assistant 15-20% and deionized water 20-30%.

Description

technical field [0001] The invention relates to a two-component waterborne epoxy paint, which is especially suitable for the concrete surface and steel structure of nuclear power plants. Background technique [0002] At present, the coatings used on the concrete surface and steel structure surface of domestic nuclear power plants are all solvent-based. Due to growing concerns about the adverse effects of organic solvents on the environment and human health, many industries, including the paint and coatings industry, are required to reduce the volatile organic compound (VOC) content of their products. There are many methods of VOC reduction in the coatings industry, but undoubtedly the most important method is the use of water-based (WB) coatings, in which water is used in whole or in part instead of the viscosity previously used to reduce the viscosity of paint formulations to the extent necessary for coating. of organic solvents. Of course, since water is not a solvent fo...

AI Technical Summary

Problems solved by technology

The above-mentioned self-dispersing and curing epoxy resin must be dispersed in specially designed high-shear equipment, and in order to ensure the stability of the dispersion, it must be produced according to a specific reaction sequence, the production process is more complicated, and the product stability is not good. Too ideal; US Patent 4246148 describes a water-soluble amine-epoxy adduct prepared by reacting an epoxy resin with a polyamine and a capping agent containing a saturated Monoglycidyl ether of linear aliphatic monohydric alcohol mixture, which has 8 to 10 carbon atoms, also introduces an emulsifiable epoxy resin composition, which is prepared by an epoxy resin and a 40% non- An aqueous solution of ionic surfactant emulsifies it into an epoxy emulsion and is used as one component of a two-component coating, and uses the above-mentioned amine-epoxy adduct as another component to form a two-component environmentally friendly industrial anti-corrosion coating

Although this kind of coating has low VOC, good chemical corrosion resistance and mechanical properties, it still needs to be emulsified with surfactants, and has poor nuclear radiation resistance and poor denuclear pollution.