Ultraviolet-cured transparent finishing coat with high colouring capacity for carpentry

Abstract

The technical scheme for realizing the objective of the invention is as follows: an ultraviolet-cured transparent finishing coat with high colouring capacity for carpentry is composed of the following ingredients in parts by weight: 15-25 parts of urethane acrylate, 10-15 parts of epoxy acrylate, 5-10 parts of tripropylene glycol diacrylate, 5-10 parts of trimethylolpropane triacrylate, 5-15 parts of pentaerythritol triacrylate, 5-10 parts of a photoinitiator, 5-10 parts of active amine, 0.5-1.0 part of a dispersant, 0.5-1.0 part of a defoamer, 0.5-1.0 part of a leveller, 3-5 parts of wear-resistant powder, 3-5 parts of matt powder and 10-20 parts of an oily dye. The high-concentration oily dye is used in the ultraviolet-cured transparent finishing coat disclosed by the invention as a breakthrough, meanwhile, the dosage of active amine is increased in a formula, thus greatly solving the problem of achieving the high colouring capacity in one step, ensuring the adhesion force of the finishing coat, achieving the purpose of curing a coating film, and increasing the production efficiency.

Description

technical field [0001] The invention relates to a coating for woodware, in particular to a high-coloring UV-curable transparent topcoat for woodware. Background technique [0002] UV coating mainly refers to the photoinitiator in the system absorbing ultraviolet light with a wavelength of 40-400nm to generate free radicals under the irradiation of ultraviolet light, so that the oligomers and reactive diluents in the system are rapidly cross-linked and cured to form a film. A new type of coating, its main features are high solid content, fast curing speed, fast coating curing, good adhesion, good fullness, high hardness, excellent weather resistance, good transparency, minimal pungent odor, no harm to the human body The toxic effect is an environmentally friendly product with low overall cost, and it is an ideal wood coating. [0003] At present, most of the common UV-curable topcoats for wood on the market have the defect of poor coloring ability. To achieve the same color...

AI Technical Summary

Problems solved by technology

Generally, the highest solid content of oil-based dyes is only 35℅, and the remaining 65℅ is volatile solvents. When the weight ratio of oil-based dyes in the paint is 10%, it means that the formula also contains 6.5℅ volatile solvents. If it is cured instantly in a short period of time, the 6.5℅ volatile solvent will remain in the paint film because it is too late to volatilize, resulting in non-drying of the paint or poor adhesion of the paint film

It can be seen that if you want to improve the coloring ability of UV-curable topcoat and ensure that the paint can be dried, just increasing the content of oily dyes cannot be achieved