Ultraviolet light coating and preparation method thereof

Abstract

The invention relates to an ultraviolet light coating and a preparation method thereof and belongs to the technical field of preparation of engineering materials. The coating is prepared from the following raw materials in percentages by weight: 40-50% of polyurethane acrylate, 15-20% of unsaturated esters, 3-6% of a photoinitiator, 1-3% of a flatting agent, 2-8% of an organic pigment and the balance of water. The preparation principle is clear and the processing method is simple. The ultraviolet light coating provided by the invention is high in curing speed and great in degree of crosslinking, and the flexibility and rigidity of polyurethane are balanced. By adding the polyurethane acrylate into the ultraviolet light coating, the viscosity of a system can be reduced and the curing rate of the system can be improved, so that the ultraviolet light coating has good constructability and excellent mechanical properties, the dosage of a diluting monomer and an organic solvent can be reduced, the ultraviolet light coating reaches certain surface hardness, the wear resistance of the coating can be improved, and the service performance is further improved.

Description

technical field [0001] The invention belongs to the technical field of engineering material preparation, and relates to an ultraviolet light coating and a preparation method thereof. Background technique [0002] Compared with various materials such as metal and glass, plastics have excellent characteristics in terms of low cost, light weight, easy molding and processing, and impact resistance. However, the scratch resistance and surface hardness of plastics are not good, and after long-term use, the plastic surface is easily scratched and affects physical properties such as surface optical properties. For example, plastics such as cellulose triacetate, polyethylene terephthalate, polymethyl methacrylate, and polycarbonate used in flat panel displays all require surface hardening. [0003] Coating a layer of hardening layer on the plastic surface can be realized by the following two methods: (1) wet coating a layer of paint, and then adopting heat curing or ultraviolet curi...

AI Technical Summary

Problems solved by technology

[0004] Chinese patent CN102643596A discloses a UV curable coating composition for PET substrates and its preparation method. The coating film has good optical properties and hardness, but uses a large amount of high refractive index monomers and organic solvents, which seriously endangers the safety of construction workers. Physical health and cause shrinkage and warping of coating materials

[0005] Chinese patent CN 102786874A discloses that the transparent hardened film for in-mold decoration has good optical properties and wear resistance, but all use inorganic nano-materials, which will inevitably cause problems such as increased viscosity of the system, particle dispersion and system compatibility