Ultraviolet curing coating composition for tectorial color steel plate

Abstract

The invention discloses an ultraviolet curing coating composition for a tectorial color steel plate. The ultraviolet curing coating composition for the tectorial color steel plate comprises the following components in percentage by weight: 5 to 20 percent of high-functional-group polyester acrylate, 15 to 32 percent of urethane acrylate, 5 to 16 percent of epoxy acrylate, 1 to 5 percent of single-functional-group acrylate monomer, 10 to 25 percent of high-functional-group acrylate monomer, 2 to 5 percent of acrylic acid esterified acrylate, 2 to 6 percent of photoinitiator, 0.1 to 1.5 percent of flatting agent, 0.01 to 0.05 percent of polymerization inhibitor, and 40 to 58 percent of solvent. Compared with the prior art, the product provided by the invention has prominent adhesion fastness with a polyester film, is quick in coating curing and compact in film formation, and has flexibility and high surface hardness; after the coating film is adhered to the steel plate and subjected to cold and hot impact, crack is avoided; and after the film coated steel plate is steamed by high-temperature water vapor, color change and dim of the surface are avoided.

Description

technical field [0001] The invention relates to the field of ultraviolet curable coatings, in particular to an ultraviolet curable coating composition for coated color steel plates. Background technique [0002] Color-coated steel plate is referred to as color-coated steel plate or color-coated steel plate. It uses high-quality cold-rolled steel plate, hot-dip galvanized steel plate, or galvanized steel plate as the substrate. After surface degreasing, phosphating, and chromate treatment, it is coated (roller coated ) or a product made by laminating an organic film (such as a PET film) with a UV-curable coating and curing by baking. It not only has the properties of high mechanical strength and easy forming of steel materials, but also has good decoration and corrosion resistance of coating materials. It has the characteristics of light weight, high strength, bright colors, and good durability. It is widely used in construction and household. Electrical appliances, interior...

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Problems solved by technology

[0003] At present, the performance of domestic coatings for the production of coated color steel plates cannot fully meet the needs, mainly due to the poor adhesion fastness between the coating and the organic film, which is easy to peel off, and dense fine particles will appear after the coating film is bonded to the steel plate and subjected to thermal shock. Cracks, after the coated steel plate is boiled by high-temperature water steam, the coating temperature is lower than 200 ℃, which leads to various problems such as the surface of the film, thus relying heavily on imported paint with high prices, which makes the cost of coated color steel plate high and reduces its cost. Market competitiveness has also greatly hindered the development of coated color steel plates in China

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