Organosilicon-modified polyurethane-acrylic ester photocurable coating and preparation method thereof

Abstract

The invention relates to an organosilicon-modified polyurethane-acrylic ester photocurable coating and a preparation method thereof. The photocurable coating comprises the following components in percentage by weight: 25 to 60 percent of polyurethane-acrylic ester, 20 to 55 percent of organic polysilane, 5 to 15 percent of solvent, 1 to 5 percent of photoinitiator and 0.05 to 4.5 percent of aid. The preparation method comprises the following steps of: weighing the organic polysilane according to the amount of a formula, putting into a container, sequentially adding a polyurethane-acrylic ester photocurable resin, the solvent and the aid, mixing uniformly, adding the photoinitiator, stirring uniformly to obtain an ultraviolet-photocurable coating, and preserving in a dark place. The ultraviolet-photocurable coating composition can be coated on base materials such as plastics, metals, glass and the like; a coating subjected to ultraviolet photocuring has excellent wear resistance and mechanical properties; and meanwhile, the coating has excellent adhesion, water resistance, salt fog resistance and alkali resistance.

Description

technical field [0001] The invention belongs to the technical field of ultraviolet light curing coatings, in particular to a transparent, highly wear-resistant and high hardness ultraviolet light curing coating and a preparation method thereof. Background technique [0002] UV curing coating and its coating technology are new surface treatment technologies emerging in the 1980s. This type of coating uses ultraviolet radiation to trigger resin curing. Compared with existing thermosetting coatings, it has the advantages of fast curing, energy saving, room temperature curing, less pollution, and superior coating performance. It is a new generation of green chemical products. Compared with coatings cured by traditional processes, UV-cured coatings show better overall performance, but for some precision instruments and high scratch resistance required by optical devices, the hardness, wear resistance, and scratch resistance of coatings The reliability still needs to be improved;...

AI Technical Summary

Problems solved by technology

The main advantages of transparent plastics are crack resistance, light weight and design flexibility, but their serious disadvantages are poor friction resistance, easy to reduce visibility and poor appearance due to scratches and scratches, which limit their scope of use

[0004] Chinese patent CN1869139A provides a UV-curable waterborne polyurethane acrylate coating resin and its preparation method, mainly using aromatic diisocyanate, polyethylene glycol, polyhydroxy Carboxylic acid, diol, hydroxyethyl methacrylate (or hydroxypropyl methacrylate), triethylamine and other raw materials, first drop polyethylene glycol into aromatic diisocyanate, and react to obtain polyurethane pre- polymer I; then polyhydroxy carboxylic acid is added to the polyurethane prepolymer I, and then dibasic alcohol is added dropwise, and the reaction obtains the polyurethane prepolymer II; then the hydroxyethyl methacrylate (or Hydroxypropyl methacrylate) is added dropwise to polyurethane prepolymer II to react to obtain polyurethane acrylate oligomer; add triethylamine to the oligomer to carry out salt-forming reaction, then add water, stir, and emulsify to obtain ultraviolet light Curing water-based polyurethane acrylate coating resin, this coating resin has excellent water solubility, good flexibility, fast light curing speed, and the stability of the emulsion diluted with water is very good; but the hydrophobic monomer of this coating Less, the hydrophilic performance cannot be continuously guaranteed, and the alkali resistance and salt spray resistance are poor

By using the film of the above-mentioned coating composition or the base material of the building exterior material, it has hydrophilicity, better self-cleaning performance and pollution resistance, and prolongs the service life of the material; but due to the use of inorganic particles, the preparation period of the coating is long and energy High consumption, more solvents, and great environmental pollution

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