Method for preparing pure water urethane resin and reverse printing ink

Abstract

The invention discloses a method for preparing a pure water urethane resin and reverse printing ink. The pure water urethane resin is prepared by the following steps of: dehydrating polyester polyol and polyether polyol with molecular weight of between 1,500 and 3,500; reacting the polyester polyol and the polyether polyol with polyisocyanate; and adding copolymer of vinyl chloride and hydroxy-ethyl acrylate into the reaction product and performing polymerization. The synthesis process of the resin is simple; and the ink prepared from the resin has the advantages of high adhesion, high wettability, high dispersion, high adhesion, bright color, high drying speed and no residue on a printed matter. The resin and the ink have wide application range and can be used for plastic thin films such as PET, PVC, BOPP, OPP and the like.

Description

1. Technical field [0001] The pure water polyurethane resin and the inner printing ink are specifically a preparation method of the pure water polyurethane resin and the inner printing ink. 2. Background technology [0002] Solvent-based lining inks have been widely used in the printing industry. Because it itself has the existence of solvents such as toluene, xylene, butanone, it will pollute the environment and endanger people's health. In particular, food packaging countries have forcibly prohibited the use of harmful solvents such as toluene and methyl ethyl ketone. At present, there are still some alcohol-soluble and ester-soluble inks in the printing industry. Although they do not contain toxic toluene, they are still based on solvents. They are flammable, explosive, and unsafe. When printing encounters static electricity, it will cause incalculable economic losses. . 3. Contents of the invention [0003] In order to solve the above-mentioned shortcomings, a prepa...

AI Technical Summary

Problems solved by technology

At present, there are still some alcohol-soluble and ester-soluble inks in the printing industry. Although they do not contain toxic toluene, they are still based on solvents. They are flammable, explosive, and unsafe. When printing encounters static electricity, it will cause incalculable economic losses.