Waterborne polyurethane resin modified epoxy steel structure anticorrosion coating and its preparation process

Abstract

The invention discloses a waterborne polyurethane resin modified epoxy steel structure anticorrosion coating and a preparation process thereof. The steps are as follows: 1) under the protection of nitrogen, the first compound is mixed with the second compound, and the waterborne polyurethane resin is obtained after reaction; 2) Preparation of component A: under stirring, sequentially mix anti-rust pigment, precipitated barium sulfate, talc powder, anti-flash rust agent, dispersant and water into the water-based polyurethane resin modified epoxy emulsion, and add half of the defoamer , disperse the pigment to below 50 mesh, then add the other half of the defoamer and leveling agent under stirring, stir evenly, mature, and filter to obtain component A; 3) component B is obtained by capping the polyamine 1. A water-based dispersion prepared after emulsification with a reactive emulsifier after the addition; 4) Mix the two components of A and B according to the ratio of 5:1 by mass, and mix them evenly in a stirrer to obtain water-based polyurethane Modified epoxy steel structure anticorrosion coating.

Description

technical field [0001] The invention relates to the technical field of chemical coatings, in particular to a waterborne polyurethane resin modified epoxy steel structure anticorrosion coating and a preparation process thereof. Background technique [0002] When water-based epoxy resin is used as a coating for steel structures, wood and other substrates, it has high hardness and tensile strength after curing, high gloss of the coating film, good adhesion to various substrates, excellent chemical resistance, and electrical insulation. With the advantages of good performance, various varieties, low price and easy availability, it has been widely used in the coating field of various steel knots, wood and other substrates. However, people have also found that water-based epoxy resins still have some shortcomings, such as insufficient flexibility of the film, poor aging resistance, and poor anti-powdering performance. Contents of the invention [0003] The purpose of the presen...

AI Technical Summary

Problems solved by technology

However, people also found that water-based epoxy resin still has some shortcomings, such as insufficient flexibility of the film, poor aging resistance, and poor anti-powdering performance.