Ultraviolet (UV) cured plastic coating

Abstract

The invention discloses an ultraviolet (UV) cured plastic coating. The coating consists of the following components in percentage by weight: 30 to 45 percent of hexadefunctional hyperbranched polyester acrylic resin, 10 to 20 percent of carbonate main chain bifunctional polyurethane acrylic resin, 5 to 10 percent of acrylic resin, 10 to 15 percent of 1,6-hexanediol diacrylate, 2 to 4 percent of photosensitizer, 1 to 2 percent of ultraviolet absorbent, 1 to 2 percent of hindered amine stabilizer, 0.9 to 1.5 percent of aid, 5 to 10 percent of nano-alumina dispersion and 15 to 20 percent of mixed solvent. When the coating is used, the components are uniformly mixed in a ratio, and the mixture is sprayed on a plastic workpiece and cured by a UV light curing machine. The coating can be used for coating on acrylonitrile-butadiene-styrene (ABS) plastic and polycarbonate (PC) plastic, and the coating layer has the characteristics of high hardness, high wear resistance, hard object scratch resistance, high gloss, yellowing resistance, environment friendliness and the like.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a plastic coating that meets environmental protection requirements and is cured by UV. Background technique [0002] With the increasing awareness of global environmental protection, the coatings industry has also begun to develop in the direction of sustainability. As a result, we can see more and more solvent-free coatings or coating systems using low levels of VOCs. UV-curable coatings, as an environmentally friendly coating, are becoming increasingly popular and have experienced rapid growth in recent years. [0003] As developing countries are adopting measures to protect the environment of each country, UV coatings have been widely used in modern society due to their advantages of environmental protection, convenience and economy, especially in 3C products, which have unparalleled advantages , I believe that this type of coating will continue to grow in the future. [0004] Spec...

AI Technical Summary

Problems solved by technology

[0010] However, UV coatings are cured by ultraviolet rays, and the formula contains a large amount of low-molecular photosensitizers. Even if the curing is complete, there will still be a large amount of photosensitizer fragments remaining, resulting in poor weather resistance of UV coatings, which are prone to yellowing when exposed to sunlight, and the remaining photosensitizers The agent will migrate to the surface of the product and has certain toxicity to the human body

In addition, the surface of high-gloss UV coatings is generally not resistant to scratches.

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