Ultraviolet/moisture dual-cured resin as well as preparation method and application thereof

Abstract

The invention relates to ultraviolet/moisture dual-cured resin as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) preparation of a prepolymer A, namely, adding a catalyst and a polymerization inhibitor to catalyze acrylic ester compounds and beta-ketone ester to perform Michael addition reaction; (2) preparation of a prepolymer B, namely, heating polyester glycol to 70 to 90 DEG C, adding a catalyst and fat diisocyanate, and stirring and reacting for 2 to 3 hours; (3) preparation of the ultraviolet/moisture dual-cured resin, namely, mixing the prepolymer A and the prepolymer B, adding a catalyst, stirring, heating to 80 to 90 DEG C, reacting until the NCO content in a mixed liquid is 8 to 13 percent, adding the polymerization inhibitor, and discharging to obtain the ultraviolet/moisture dual-cured resin. The ultraviolet/moisture dual-cured resin prepared with the preparation method is high in curing speed, high in solid content and high in NCO content; a prepared paint film has the excellent compressive performance, such as resistance to chemicals, adhesion force and high temperature resistance.

Description

technical field [0001] The invention relates to polymer materials, in particular to an ultraviolet light / moisture dual curing resin and its preparation method and application. Background technique [0002] Wood coatings occupy a very important position in modern furniture coatings, which can play a variety of purposes such as decorating, protecting, or giving other special functions to the substrate. With the development of social economy, the implementation of the national energy conservation and emission reduction strategy, and the improvement of people's environmental protection needs and requirements, solvent-based wood coatings will be more and more restricted. [0003] Due to the characteristics of environmental protection, energy saving and high efficiency, UV curing wood coatings have attracted more and more attention and developed rapidly. UV-curable coatings are usually composed of UV resins, reactive diluents or organic solvents, photoinitiators, and additives. T...

AI Technical Summary

Problems solved by technology

UV-curable coatings are usually composed of UV resins, reactive diluents or organic solvents, photoinitiators, and additives. They have the characteristics of high solid content, low energy consumption, fast curing, excellent film performance, and high production efficiency. Because it is cured under ultraviolet light, in some shadow areas that cannot be illuminated, and the curing conversion rate of colored systems and thick coatings is low, there are also requirements for the shape of the cured object, and the curing of special-shaped parts is limited.

Other curing types of coatings are difficult to meet the market's requirements for comprehensive performance of coatings such as chemical resistance, adhesion, and high temperature resistance.

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