Waterborne polyurethane printing ink resin and production method thereof

Abstract

The invention relates to waterborne polyurethane printing ink resin and a production method thereof. The production method of the waterborne polyurethane printing ink resin comprises the steps of according to weight parts, under a condition of protection of inert gas, taking 100-140 parts of cyclic isocyanate, 95-160 parts of polypropylene oxide glycol with a molecular weight of 2000, 40-70 partsof homemade polyester polyol with a molecular weight of 200-400 and 20-35 parts of hydrophilic groups, and placing the raw materials in a container; stirring a solution in the container, slowly elevating temperature, when the temperature reaches 80 DEG C, carrying out a heat preservation reaction for 5 hours, conducting sampling, detecting a NCO value, and when the NCO value is in a prescribed range, starting to conduct cooling to obtain a NCO-terminated prepolymer; and adding 10-20 parts of ethylenediamine and 600-650 parts of deionized water into the prepolymer, when the temperature is 30 DEG C, conducting high-speed stirring for two hours, conducting sampling, detecting the NCO value, when the NCO value is zero, conducting high-speed stirring continuously for 2 hours, and standing to obtain the waterborne polyurethane resin. According to the waterborne polyurethane printing ink resin and the production method thereof, waterborne polyurethane is produced by adopting an anion self-emulsifying technology, the tenacity and the rigidity of the anionic waterborne polyurethane are good, and the anionic waterborne polyurethane has good dispersity, water resistance and stability so thatthe waterborne polyurethane can conveniently form a film.

Description

technical field [0001] The invention relates to the technical field of polyurethane, in particular to a water-based polyurethane ink resin and a preparation method thereof. Background technique [0002] Ink is an important material for printing. It expresses patterns and characters on the substrate through printing. Ink is generally composed of pigments, binders, solvents and additives, etc. These components are evenly mixed and rolled repeatedly to form a viscous colloidal fluid. Ink is widely used in various printings such as books, periodicals, packaging and decoration, and architectural decoration; as social demand increases, ink varieties and output also expand and increase accordingly. The binder of the ink is usually water-based polyurethane, which is widely used for its excellent properties such as high and low temperature resistance, embrittlement resistance, friction resistance, strong adhesion, good flexibility, good elasticity and high tensile strength. [0003...

AI Technical Summary

Problems solved by technology

[0005] The existing notification numbers are the methods for preparing water-based polyurethane proposed by Chinese patent documents CN103450440B and CN105622886A, all adopting the synthesis of acetone method and prepolymer method, that is, in the process of preparation, adding acetone or other ester solvents to dilute the prepolymer polymer, and then through chain extension reaction, finally dispersed in water to obtain water-based polyurethane resin, but the water-based polyurethane resin did not evaporate to remove the organic solvent in the end, so it cannot be regarded as the real water-based polyurethane