Water-based epoxy anti-corrosion primer

Abstract

The invention discloses a water-based epoxy anti-corrosion primer which consists of a component A and a component B, wherein the component A is prepared from the following raw materials in percentage by weight: 10 to 20 percent of a modified amine hardener, 25 to 40 percent of deionized water, 5 to 30 percent of pigment, 15 to 35 percent of a filler, 5 to 15 percent of an antirust pigment, 0.1 to 0.4 percent of a defoaming agent and 0.3 to 0.8 percent of a leveling agent; the component B is prepared from the following raw materials in percentage by weight: 10 percent of an emulsifier, 50 percent of liquid epoxy resin, 39.8 percent of deionized water and 0.2 percent of a defoaming agent; the quality indexes are as follows: the fineness is less than or equal to 15 [mu]m, the epoxy value is 0.28 to 0.30, and the solid content is 55 +/- 2 percent. The invention further discloses a processing method. The primer is solvent-free and can realize odorlessness and zero discharge; a paint film can be naturally dried, smooth, flat and compact; solvent discharge is eliminated in storage, transportation and use processes; the performance meets the requirements of the standard HG/T4759-2014.

Description

technical field [0001] The invention belongs to the technical field of industrial anticorrosion coatings, and relates to a two-component water-based epoxy anticorrosion primer. Background technique [0002] There are the following four technologies close to the present invention. [0003] 1. A water-based epoxy anti-corrosion coating and its preparation method, application number: CN201410480505.2, which discloses a water-based epoxy anti-corrosion coating, including epoxy resin, composite iron-titanium powder, silicon carbide, aluminum tripolyphosphate, iron oxide Red, talcum powder, mica powder, deionized water, butyl acrylate, curing agent, wetting agent, dispersant, defoamer and corrosion inhibitor; the preparation method is: deionized water, wetting agent, dispersant, The foaming agent is added to the disperser according to the preset mass ratio, followed by adding composite iron-titanium powder, aluminum tripolyphosphate, iron oxide red, talc powder, and mica powder t...

AI Technical Summary

Problems solved by technology

[0007] The current customer still uses solvent-based epoxy coatings, which need to add 30-50% organic solvents during production and use, which seriously pollutes the environment and affects the health of construction workers; and the main problems of water-based epoxy coatings developed and produced at this stage are: 1. Single function, narrow use area, lack of versatility; 2. Corrosion inhibitors and co-solvents need to be added, otherwise the product is prone to problems such as poor leveling, pinholes, edge shrinkage, and rust when used on steel structures; 3. Products The solid content is low, and the non-volatile content of water-based products currently stays at about 40%; 4. Some water-based epoxy products only meet the requirements of the experimental stage, and cannot meet the requirements in actual production and application; 5. There is no advantage in high prices; therefore, The development of water-based epoxy anti-corrosion coatings is the necessity of social and environmental protection and development