Epoxy resin modified polyurethane anticorrosive water-based paint and preparation method thereof

Abstract

The invention relates to the technical field of paint processing, in particular to an epoxy resin modified polyurethane anticorrosive water-based paint and a preparation method thereof. The paint comprises polypropylene glycol, isophorone diisocyanate, dibutyltin dilaurate, 2,2-dimethylolpropionic acid, trihydroxypropane, epoxy resin, 1,4-butanediol, triethylamine, ethylenediamine, N-methylpyrrolidone, deionized water, a filler and an auxiliary. The method utilizes trimethylolpropane to assist cross-linking, and improves the chemical cross-linking density of the paint, thereby improving the structural stability and mechanical properties of the paint film; acetone is not added, it is not necessary to distill an emulsion to recover a solvent, the VOC content is reduced, the energy consumption is reduced, and a silane coupling agent is directly added to the epoxy resin modified polyurethane paint according to the paint formulation, which significantly improves the adhesion of the paint layer to a substrate.

Description

technical field [0001] The invention relates to the technical field of paint processing, in particular to an epoxy resin modified polyurethane anti-corrosion water-based paint and a preparation method thereof. Background technique [0002] At present, some people use isocyanate and polyester polyol to synthesize polyurethane prepolymer first, and then add additives, filler stirring, ball milling and other processes to make polyurethane water-based coatings. However, traditional polyurethane water-based coatings have general performance and a single application range. Modification of polyurethane can improve the mechanical properties of water-based coatings, but one-component epoxy resin modified polyurethane water-based coatings have low storage stability and are easy to cure. CN201710580899.2 epoxy-modified waterborne polyurethane coating and its preparation method and CN20181047999000.7 a kind of epoxy resin modified polyurethane waterproof coating and its preparation meth...

AI Technical Summary

Problems solved by technology

[0002] At present, some people use isocyanate and polyester polyol to synthesize polyurethane prepolymer first, and then add additives, filler stirring, ball milling and other processes to make polyurethane water-based coatings. However, traditional polyurethane water-based coatings have general performance and a single application range. Modification of polyurethane can improve the mechanical properties of water-based coatings, but one-component epoxy resin modified polyurethane water-based coatings have low storage stability and are easy to cure

CN201710580899.2 epoxy-modified waterborne polyurethane coating and its preparation method and CN20181047999000.7 a kind of epoxy resin modified polyurethane waterproof coating and its preparation method all add acetone, but acetone needs to be recycled, and the recovery rate is low, it is difficult to Repeated use, which will lead to increased routing costs