Ultraviolet-cured white butyl coating as well as preparation method and application thereof

Abstract

The invention provides an ultraviolet-cured white butyl coating as well as a preparation method and application thereof, and belongs to the field of coatings. The resin raw material used in the invention is urethane acrylate resin which has certain toughness and contains a phosphate structure; the polyurethane acrylate resin, titanium dioxide, a photosensitizer, a dispersing agent, a leveling agent and an antifoaming agent are synthesized into the ultraviolet-cured white butyl coating. The coating improves the adhesive force to tinplate in the true sense, and meanwhile, the siloxane resin component in the structure improves the temperature resistance, water resistance and other properties.

Description

technical field [0001] The invention belongs to the technical field of coatings, and relates to an ultraviolet curable resin and coating for tinplate, in particular to an ultraviolet curable white curable coating and its preparation method and application. Background technique [0002] Tinplate is a commonly used packaging material in modern times. It is mainly used for packaging. Tinplate has the characteristics of corrosion resistance, non-toxicity, high strength and good ductility. As an important packaging material, it has been widely used from the food industry to traditional industries. , including food packaging tin boxes, tin cans and other fields. Before tinplate is used as a packaging material, and before the surface of tinplate is printed to meet specific use requirements, it is necessary to coat a layer of white paint on its surface for subsequent printing. This white primer paint is called Bai Ke Ding . [0003] So far, the white curdine used in tinplate print...

AI Technical Summary

Problems solved by technology

[0004] Although some researches have been done on UV curable white cured coatings, compared with thermal cured coatings, there are still a series of problems such as low adhesion to tinplate, coating resistance to water boiling, and poor impact resistance, which have led to the current It is difficult to implement UV light-cured white curdine coating

[0005] In order to improve the adhesion between the coating and the tinplate, the traditional method is to add a phosphate monomer during the preparation of the tinplate coating. There are three problems: first, the added phosphate monomer has a certain gap between the polarity and the resin, so it is difficult to mix into a uniform phase. Therefore, the storage stability is relatively poor, and it will be separated from the Severe phase separation of the host resin, resulting in incomplete performance of this phosphate ester adhesion promoter

Second, due to the small molecular weight of the added phosphate monomer, it will gradually dissociate to the surface of the paint film, which not only affects the appearance of the coating, but also continuously dissociates to the surface of the paint film, making the adhesion between the coating and the tinplate change. Difference

Third, the added phosphate monomer contains unsaturated double bonds. After UV curing, due to the small molecular weight, the paint film will become brittle and the toughness will become poor.

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