Low-ultraviolet energy curing vacuum-spraying UV coating and preparation method thereof

Abstract

The invention discloses low-ultraviolet energy curing vacuum-spraying UV coating and a preparation method thereof. The low-ultraviolet energy curing vacuum-sprarying UV coating is made of, by weight, 26-35% of modified low-viscosity high-functionality epoxy acrylate, 10-25% of modified high-functionality polyester acrylate, 8-12% of special modified polyurethane acrylate, 25-40% of TPGDA, 3-7% of HEMA, 0.3-0.8% of wetting dispersant, 5-10% of transparent filler, 4-8% of photoinitiator, 0.3-0.5% of leveling agent, and 0.1-0.3% of other auxiliaries. Compared with common like coatings, the vacuum-spraying UV coating has the advantages that ultraviolet energy required for coating curing is greatly reduced, and energy is saved and effectively used. In addition, possibility to cause quality defect of the backlight side of special-shaped workpieces is decreased. The vacuum-spraying UV coating has the advantages of excellent coating strength and transient leveling property.

Description

technical field [0001] The content of the present invention relates to the field of ultraviolet light curing materials, in particular to a low ultraviolet light energy curing vacuum spraying UV coating and a preparation method thereof. Background technique [0002] Vacuum spraying is an environmentally friendly and efficient spraying construction technology that has emerged in the coating field in recent years. This coating process can make the paint form an atomized cycle in a closed negative pressure environment. For special-shaped parts of various substrates (such as special-shaped Wooden lines, plastic lines, etc.) No matter how complicated the cross-sectional shape is, it can ensure uniform spraying on each surface, and can spray all-round spraying on the surface of the workpiece at one time. In the invention, the coating has no leakage and discharge at the construction site, is safe and environmentally friendly, and greatly improves the production efficiency, and at th...

AI Technical Summary

Problems solved by technology

Due to the generation of a large amount of infrared energy, the surface temperature of the workpiece during the curing process is too high and the workpiece is damaged

[0003] Many materials on the market are laminated with veneer or decorative paper on the substrate, but the high temperature during the curing process of the coating can easily cause degumming and blistering of the laminated layer

Moreover, the different shapes of special-shaped parts lead to the inability to fully accept the irradiation of ultraviolet light during the coating process, so that the required curing effect cannot be achieved.

In order to reduce the adverse effect of temperature on the special-shaped parts during the curing process, a filter device is used in the curing equipment to prevent infrared rays from irradiating the surface of the workpiece to achieve the purpose of cooling down. While the filter device filters infrared rays, it also filters a large part of ultraviolet light, greatly It reduces the UV irradiation energy of the coating, which affects the curing degree of the coating, resulting in product quality defects

[0004] In view of the above problems, the present invention has developed a low-ultraviolet light energy curing vacuum spraying UV coating, which can be used at 40~80mj / cm 2 Curing under radiant energy reduces product quality issues caused by heat from curing equipment