Preparation method of functional aqueous polyurethane coating

Abstract

The invention relates to a preparation method of functional aqueous polyurethane coating. The preparation method includes: adding polytetramethylene glycol into a four-port flask, and adding isophorone diisocyanate to obtain prepolymer; adding 1, 4-butanediol into the prepolymer, and adding N-methyl pyrrolidinone containing dimethylolpropionic acid to obtain a chain extension system; dripping methacrylic acid beta-hydroxyethyl acrylate, adding triethylamine, and stirring at high speed for dispersion until the emulsion is dispersed completely to obtain aqueous polyurethane emulsion; using the aqueous polyurethane emulsion as the raw material and ammonium perfluorocaprylate and lauryl sodium sulfate as the emulsifier, dripping methyl methacrylate and dodecafluoroheptyl methacrylate, using the redox system of potassium persulfate and sodium hydrogen sulfite as the initiator to perform emulsion polymerization so as to obtain fluorinated polyurethane-acrylate emulsion, namely the functional aqueous polyurethane coating. The functional aqueous polyurethane coating is excellent in waterproof performance, leakage resistance, adhering performance, corrosion resistance, pressure resistance and the like.

Description

technical field [0001] The invention relates to a preparation method of functional water-based polyurethane paint, which is used for the preparation of paint. Background technique [0002] Due to the continuous improvement of people's requirements for material properties, fluorine-containing polyurethane materials with various excellent properties have attracted widespread attention from all walks of life. [0003] At present, polyurethane has been applied in coatings, adhesives, aerospace materials, medical products and other fields, especially the green and environmentally friendly water-based fluorine-containing polyurethane materials have become a research hotspot in recent years. Fluorine-containing water-based polyurethane-acrylate coatings are the best comprehensive performance of water-based coatings. Fluorine-containing high polymers are a type of special polymer materials. Because the fluorine atoms have small radius, strong electronegativity, and carbon-fluorine b...

AI Technical Summary

Problems solved by technology

[0005] The preparation of the existing water-based polyurethane coatings is relatively difficult, and the prepared coatings cannot achieve good performances such as anti-penetration, corrosion resistance, and pressure resistance, so that the best results cannot be reflected in practical applications.