Ultraviolet-curing waterborne epoxy-polyurethane-acrylate copolymer resin anticorrosive coating and preparation method thereof

Abstract

The invention discloses an ultraviolet-curing waterborne epoxy-polyurethane-acrylate copolymer resin anticorrosive coating and a preparation method thereof. The matrix resin is prepared from three monomers, namely epoxy resin, polyurethane and acrylic resin in a copolymerization manner; self-emulsification of the matrix resin in water is achieved, so as to obtain epoxy-polyurethane-acrylate copolymer resin aqueous dispersion; and assistants such as a waterborne light initiator, an acrylic ester crosslinking agent and the like are added to the aqueous dispersion, so as to obtain the ultraviolet-curing waterborne epoxy-polyurethane-acrylate copolymer resin anticorrosive coating. The synthetic process disclosed by the invention is simple. Water is taken as a dispersion medium, so that the process is environment-friendly and non-toxic, and the storage period is long. The coating is solidified into a film by adopting ultraviolet light, and the coating technology is simple and efficient. The coating after the anticorrosive coating is solidified has good adhesive force, hardness and glossiness, and excellent corrosion resistance, and can be applied to the fields such as wood finishing coats, environment-friendly building antisepsis coatings, cabin corrosion prevention for aircrafts and ships and warships in an ocean environment.

Description

technical field [0001] The invention relates to the technical field of polymer material anticorrosion, in particular to an ultraviolet-cured waterborne epoxy-polyurethane-acrylate copolymer resin-based anticorrosion coating and a preparation method thereof. Background technique [0002] At present, there are five most common types of coatings on the market: solvent-based coatings, light-curing coatings, powder coatings, water-based coatings, and high-solid content coatings. The traditional solvent-based coatings still account for the major share in the market. With the emphasis on the environment in various countries and the strict restrictions on volatile organic compounds (VOC) in environmental protection laws and regulations, UV-curable coatings and water-based coating technologies have increasingly attracted people's attention due to their environmental advantages. Water-based polyurethane and other water-based resins have broad application prospects. , its easy-to-adju...

AI Technical Summary

Problems solved by technology

However, the degree of crosslinking is low, and the water resistance and corrosion resistance of the coating cannot be guaranteed.

Chinese patent application number CN201210216001.0 discloses a UV-curable anti-corrosion coating, which is compounded with water-based polyurethane acrylate or epoxy acrylate, water-based polyaniline, photoinitiator, pigment and filler to obtain a UV-curable anti-corrosion coating. The corrosion resistance of coatings is improved to a certain extent compared with commercially available anti-corrosion coatings, but it needs to add water-based polyaniline as an anti-corrosion additive, and the main film-forming substance of the coating itself cannot achieve corrosion resistance

Epoxy resin has high hardness, good physical and chemical properties, excellent bonding strength to the surface of metal and non-metal materials, and is stable to alkali and most solvents, but its weather resistance is poor, and it is easy to pulverize under light, while acrylic acid Resin has the advantages of excellent light resistance, good gloss, outdoor exposure durability and good corrosion resistance, but its abrasion resistance and chemical resistance are poor, and it is sticky at high temperature and brittle at low temperature

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