All-solid low-energy-curing matte UV coating for PVC plastic and preparation method for UV coating

Abstract

The invention discloses an all-solid low-energy-curing matte UV (ultraviolet) coating for a PVC (polyvinyl chloride) plastic and a preparation method for the UV coating. The coating contains the following components: 25-30% of special modified acrylic resin, 5-10% of urethane acrylate, 20-25% of high-functionality active monomers, 20-25% of a reactive diluent, 2-5% of a photoinitiator 1, 1-4% of a photoinitiator 2, 3-6% of a photoinitiator 3, 0.3-1.0% of a dispersant, 5-10% of extinction powder, 0.5-1.0% of wax powder, 0.1-0.5% of a defoamer and 0.1-0.5% of a leveling agent. The UV coating does not contain a solvent and can be cured to form a low-luster, high-scratch-resistant and pollution-resistant paint film only by 150-200 mj / m<2> of UV energy; and the UV coating is applied to soft PVC and can enable a base material not to be thermally damaged in a curing process, so that the application range of the UV coating is greatly expanded.

Description

technical field [0001] The invention relates to the field of coatings, in particular to an all-solid low-energy curing matte UV coating for PVC plastics and a preparation method thereof. Background technique [0002] Plastic is a heat-sensitive substrate, which is easily deformed by heat, which affects the appearance and application performance. Usually painted with traditional self-drying paints or ultraviolet (UV) curing paints. Traditional self-drying paints mainly include alkyd paint, nitro paint, polyester polyurethane paint and thermoplastic acrylic paint, etc. These traditional self-drying paints have high VOC (volatile organic compound) content, high Odor and toxicity, and long drying time, the physical and chemical properties of the paint film are poor. UV-curable coatings use ultraviolet light to quickly initiate polymerization. Compared with traditional coatings, they are energy-saving, environmentally friendly, economical, and high-performance. They are widely ...

AI Technical Summary

Problems solved by technology

[0004] (1) The energy required for curing is too high, and its application on soft PVC (such as PVC wallpaper, film) that is easily damaged by heat is limited, and it does not meet the requirements of energy saving;

[0005] (2) Due to the rapid curing and high cross-linking characteristics of UV coatings, although most UV matte coatings have a certain matting effect, it is difficult to achieve a real matting effect;

[0006] (3) Since the solvent volatilization process can promote the floating of the matting powder and the orientation of the matting powder on the surface of the paint film, in order to obtain a lower gloss, most of the UV matte coatings have added a certain amount of volatile non-toxic organic solvents, which cannot meet the requirements of real green environmental protection;

[0007] (4) In daily application, PVC products often encounter all kinds of wiping, collision and friction, so the requirements for scratch resistance are high, and the current UV coating for PVC is not ideal for scratch resistance