Waterborne ultraviolet (UV) coating and preparation method thereof

Abstract

The invention discloses a waterborne ultraviolet (UV) coating and a preparation method thereof. The waterborne UV coating is prepared from the following components by mass percent: 25-35% of polyacrylate, 20-30% of waterborne epoxy resin, 5-10% of waterborne polyurethane, 10-15% of deionized water, 5-15% of a photoinitiator, 2-5% of a dispersing agent and 2-10% of a leveling agent. The waterborneUV coating provided by the invention is fast in curing speed in the initial stage of an ultraviolet curing stage. Triethanolamine is not only used as the dispersing agent, but also can be taken as a curing agent for the waterborne polyurethane; polyurethane bonds formed by means of the curing of the waterborne polyurethane can also promote cross-linking and curing of the waterborne epoxy resin, sothat the properties of the coating are further improved; the waterborne epoxy resin and waterborne polyurethane are added into the coating, so that the coating is both flexible and tough, and achieves an excellent effect when being applied to the surface coating of artificial leather.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a water-based UV coating and a preparation method thereof. Background technique [0002] UV coatings are UV-curable coatings, which were first used in the furniture and flooring industries, and have the advantages of fast curing speed, low energy consumption, and low pollution. With the development of coating technology, UV coatings are gradually applied to plastics, paper, wood, metal, leather and other materials, becoming an important choice for decorative coatings in many industries. With the concepts of energy saving, emission reduction, environmental protection and safety gradually gaining popularity, water-based UV coatings and high-solid UV coatings are gradually showing a tendency to replace oil-based UV coatings of organic solvents. [0003] It is not uncommon to use UV coatings on artificial leather to decorate. Utilize the organic UV coatings of the prior...

AI Technical Summary

Problems solved by technology

[0003] It is not uncommon to use UV coatings on artificial leather to decorate. Utilize the organic UV coatings of the prior art to often have the following key problems: one, odor problem, most of the oily coatings often have irritation due to solvent residue or incomplete reaction. Second, environmental protection issues, there are VOC emissions during the preparation and use of oil-based coatings, and the solvent will be released when curing and heating; Third, cross-linking density, the cross-linking density of oil-based coatings is slightly lower