Binder with high adhesion performance for water-based ink

Abstract

The invention discloses a binder with high adhesion performance for water-based ink. A preparation process of the binder comprises the following steps: adding water-soluble polyester resin and water into a reaction tank for dissolving, then adding a cross-linking adhesion enhancer and a sodium hydroxide solution, conducting reacting for 8-10 hours, conducting cooling, crystallizing and filtering, stirring and reacting the filter cake in a methanol solution at 40 DEG C for 1 hour, and then conducting cooling and rotary evaporation to obtain a primary binding material; and simultaneously adding the primary binding material, octanediamine, sodium hydroxide and water into a reaction tank, and conducting stirring, dissolving and reacting for 7-8 hours to obtain the water-soluble binder. According to the binder, the water-soluble polyester resin is used as a matrix, and quaternary ammonium salt groups are introduced into the water-soluble polyester resin, so that the binder can be well dissolved in water, and even if the water-soluble polyester resin is crosslinked for multiple times, although the polymerization degree of the water-soluble polyester resin is enhanced and hydrophobic alkyl is introduced into the water-soluble polyester resin, the prepared binder still can be dissolved in water at 50 DEG C, an organic solvent does not need to be additionally added and the environment-friendly performance is realized.

Description

technical field [0001] The invention belongs to the field of ink preparation and relates to a binder for water-based ink with high adhesion performance. Background technique [0002] The ink is usually fixed by adding a binder during the preparation process. The printing ink applied to the surface of the can generally uses polyester resin as the binder, and the solvent used in it is organic, and the solvent is easy to volatilize during the printing and baking process , produces odor, and has certain toxicity, so it is imperative to develop a water-soluble binder, and the water-soluble binder can be dissolved in water, but at the same time, the performance of the water-soluble binder is unstable in high-temperature water, making The ink is easy to peel off, causing damage to the color pattern. Contents of the invention [0003] The purpose of the present invention is to provide a binder for water-based ink with high adhesion performance. Re-crosslinking between the enhanc...

AI Technical Summary

Problems solved by technology

[0002] The ink is usually fixed by adding a binder during the preparation process. The printing ink applied to the surface of the can generally uses polyester resin as the binder, and the solvent used in it is organic, and the solvent is easy to volatilize during the printing and baking process , produces odor, and has certain toxicity, so it is imperative to develop a water-soluble binder, and the water-soluble binder can be dissolved in water, but at the same time, the performance of the water-soluble binder is unstable in high-temperature water, making Ink peels off easily, causing damage to color patterns

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