PVC (polyvinyl chloride) coating cured by using UV (ultraviolet)-LED (light-emitting diode) light source and preparation method of PVC coating

Abstract

The invention aims to provide a PVC (polyvinyl chloride) coating cured by using a UV (ultraviolet)-LED (light-emitting diode) light source and a preparation method of the PVC coating. The coating is prepared from the following raw materials by weight percent: 40-50% of polyurethane acrylate, 5-15% of modified acrylate oligomer, 5-10% of hyperbranched acrylate oligomer, 30-40% of acrylate reactive diluent, 3-7% of photoinitiator, 0.2-0.4% of auxiliary and 0-20% of color filler. The PVC coating has the advantages that the coating can be fast cured under the UV-LED light source, and has good adhesive force on PVC. The problems of slow curing speed and poor surface dryness of a photocured PVC coating under the UV-LED light source are completely solved.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a PVC coating which can be cured by using a UV-LED light source and a preparation method thereof. Background technique [0002] Compared with general coatings, UV-curable coatings have the following advantages: ①The curing time is short, the speed is fast, and can be cured within a few seconds, and can be applied to occasions that require fast curing; Materials that are not suitable for heating such as plastics and materials with large heat capacity such as concrete and thick metal plates are very useful; ③ can be formulated into solvent-free products to reduce air pollution and benefit environmental protection; ④ save energy, and the efficiency of ultraviolet light sources is higher than that of ovens; ⑤ The curing process can be automated to improve the degree of automation in production, thereby improving production efficiency and economic benefits. [0003] Alth...

AI Technical Summary

Problems solved by technology

Generally, only 20% of the power of ultraviolet light bulbs is transformed into ultraviolet rays, visible light accounts for 10%, and infrared rays and heat energy account for 70%. The temperature of the tube wall of a general mercury lamp can reach about 600°C; , ABS, PE, PS, PET and other printing materials with poor heat resistance and printing and thermal influence are greater, which often cause deformation and damage to the substrate. The service life of the high-pressure mercury lamp is short, generally at most 2000-3000 Hours, the amount of ultraviolet rays will be reduced by 15-20% when approaching the later stage, so the reflector should be cleaned regularly, and the equipment needs to be replaced and maintained frequently, which increases the cost of use; the ozone produced by the high-pressure mercury lamp will cause damage to the surrounding equipment. Corrosion, ozone itself has adverse effects on the human respiratory system, and high-pressure mercury lamps contain mercury, which is harmful to the environment. The European Union also has regulations to limit the scope of use of mercury lamps. Therefore, it is the general trend to develop and use new energy-saving and environmentally friendly curing light sources.

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