Highly wearable vacuum coating ultraviolet curing coatings

Abstract

The invention relates to the electronic application-coating field, in particular to uv-curing coating with high wearing resistance and vacuum coating. The compositions and contents of the invention are: 10 wt percent to 30 wt percent of difunctional group polyurethane acrylate, 10 wt percent to 40 wt percent of high functional group polyurethane acrylate, 5 wt percent to 20 wt percent of high functional group acrylate monomer, 0 wt percent to 15 wt percent of monofunctional group acrylate monomer, 1 wt percent to 10 wt percent of acid adhesive promoter, 1 wt percent to 6 wt percent of photoinitiator, 0 wt percent to 5 wt percent of nano wearing resistance materials, 0.1 wt percent to 2 wt percent of additive and 10 wt percent to 50 wt percent of solvent. The invention is designed for providing surface protection for vacuum coating parts of electric products such as mobile phone, MP3, and digital camera, etc., and is characterized by good surface effect, good performances of ultrawear-resistance, high temperature and humidity resistance, anti-cold thermal cycling and anti-yellowing, etc., wherein, RCA wear can be up to more than 1500 times, which can effectively improve the service life of electric products. The invention effectively enhances the adhesion and wearing resistant performance of the uv-curing and vacuum coating dope, solves the matching problem of the bottom and surface lacquer of the uv-curing and vacuum coating dope, and has broad university.

Description

technical field [0001] The invention belongs to the field of coatings, in particular to an ultraviolet curing coating used after the surface of a workpiece is metallized by vacuum coating. Background technique [0002] After more than 40 years of development, radiation curing technology has been widely used in various fields and industries all over the world. Ultraviolet curable coatings (UV coatings for short) have the advantages of low VOC content, fast curing speed, and good comprehensive properties of the coating film, and have developed rapidly in China. The plastic substrate is treated by vacuum coating, which can make the workpiece get a high degree of metallic luster and mirror effect. UV-curable vacuum coating coatings are generally applied by spraying, with fast curing speed, simple operation and convenient construction, and have been widely used. Generally used in computer peripheral equipment, communication equipment, audio-visual equipment, consumer electronic...

AI Technical Summary

Problems solved by technology

Wherein the Chinese patent CN1281011A applies for "ultraviolet light curing vacuum coating bottom and topcoat", the topcoat adopts polyester acrylate and phenolic epoxy acrylate as the main resin, which solves the adhesion problem of the ultraviolet light curing vacuum coating topcoat, but due to Low hardness, poor wear resistance and stain resistance, Chinese patent CN1803942A application "UV curable coating for metal coating surface protection" uses epoxy acrylic resin and polyurethane resin with 2 functional groups as the main resin, with thermoplastic acrylic resin and fiber The composite resin composed of plain resin improves the hardness of the coating by increasing the rigid structure in the coating system. However, due to the poor wear resistance of epoxy acrylic resin and the poor anti-yellowing performance of the coating film, it is far from meeting the requirements of today's electronic products for coatings. Higher requirements, especially the need for high wear resistance

Thus limiting the application of UV-curable vacuum coating coatings