Solvent-free epoxy rust confining coating capable of coating in wet and rust environment

Abstract

The invention relates to a solvent-free epoxy rust confining coating capable of coating in a wet and rust environment. The solvent-free epoxy rust confining coating consists of two components A and B; the weight of the component A is 1.5 to 2.5 times that of the component B; in percentage by weight, the component A is prepared from 50 to 90 percent of main film forming resin, 20 to 40 percent of first reactive diluent, 1 to 3 percent of wetting leveling resin and 0.2 to 1.0 percent of solvent-free defoaming agent; in percentage by weight, the component B is prepared from 60 to 90 percent of curing agent, 2 to 10 percent of modifier and 5 to 15 percent of second reactive diluent. The main film forming resin is bisphenol F-type epoxy resin, an active agent is hyperbranched polyether-polyester resin terminated by phenolic hydroxy and carboxyl, the curing agent is mannich amide, and the modifier is ketimine. The rust confining primer disclosed by the invention has a low requirement for surface processing, can be constructed on a wet surface, is high in stability of a rusted position, and is excellent in long-acting protection performance on an integral object.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a solvent-free epoxy rust-inhibiting coating which can be coated with wet rust. Background technique [0002] According to the statistics of the National Anti-Corrosion Association in 2014, the direct loss caused by steel corrosion in China is about 30 billion each year, and the annual loss of corroded steel accounts for 3% of the annual steel production, which is an astonishing amount. [0003] At the same time, according to the statistics of the National Anti-Corrosion Association, after nearly 10 years of rapid development of the domestic construction industry, a large number of anti-corrosion projects have appeared corrosion to varying degrees within 2-5 years after completion. Rust or spot rust that occurs about 2 years after completion, if not treated, the rust will continue to grow, and the rate of rust expansion will increase. The final result, one is to affect the deco...

AI Technical Summary

Problems solved by technology

The final result, one is to affect the decorative effect of the coating and affect its appearance; the other is to affect the structural performance of the metal, which will seriously affect its safety

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