Water-based UV black ink with super-high solid content and preparation method thereof

Abstract

The invention discloses water-based UV black ink with super-high solid content and a preparation method thereof. The black ink comprises the following components in percentage by weight: 20%-60% of high-functionality water-based polyurethane acrylate, 5%-8% of compound photoinitiator, 15%-35% of hydrophilic acrylate diluted body or prepolymer, 10%-25% of solvent and 5%-15% of nano-carbon black pigment. The light curing time of the water-based UV black colored paint of the invention is shorter than 5 seconds, the bottom layer can be completely cured, the comprehensive properties of adhesive force, hardness, toughness and the like are excellent, and the water-based UV black colored paint can be widely applied to the fields of ink, wood paint and the like; the solid content is as high as 80%;and the water-based UV black ink has short drying and curing time, simple construction technology and high production efficiency, can be diluted by water or ethanol or other nontoxic solvents for regulating the viscosity, is suitable for various production modes and production requirements, and is environment-friendly and nontoxic.

Description

technical field [0001] The invention relates to an ultra-high solid content aqueous UV black ink and a preparation method of the black ink. Background technique [0002] With the development of science and technology, traditional solvent-based inks have exposed many problems, such as emitting a large amount of VOC (volatile organic compounds) into the atmosphere, which poses a huge threat to the working environment, packaging contents and human health. Therefore, the development of "green inks" represented by water-based inks and radiation-curable inks is an important development trend of future inks. [0003] Water-based UV ink is a new type of "green ink" emerging in recent years. It can combine the advantages of water-based ink and UV ink, and has received more and more attention. However, the current water-based UV inks still have the following disadvantages: (1) Water-based UV inks usually contain a large amount of water with low solid content. Due to the high surface ...

AI Technical Summary

Problems solved by technology

However, the current water-based UV inks still have the following disadvantages: (1) Water-based UV inks usually contain a large amount of water with low solid content. Due to the high surface tension and high heat of vaporization of water, drying takes time and energy , the process is complicated, and the production efficiency is low; (2) The linking materials in water-based UV inks, such as polyurethane acrylate, polyester acrylate and epoxy acrylate polymers, are often terminated with monofunctional hydroxy acrylate, and the system The unsaturated functionality of carbon black is low, the curing rate is slow, and the crosslinking density, adhesion and mechanical properties are not ideal, so there is still a big gap in its comprehensive performance compared with solvent-based inks; (3) carbon black pigments in water-based systems The dispersion in the medium is not ideal, and because the light-absorbing and shielding effect of carbon black pigment is very strong, it will cause the phenomenon that the bottom of the ink layer is difficult to cure

Images