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Waterborne polyurethane binder and preparation method thereof

A technology of water-based polyurethane and linking materials, which can be used in inks, household utensils, applications, etc., and can solve problems such as gaps

Inactive Publication Date: 2011-09-07
GUANGDONG YINGKE GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, water-based inks generally use maleic rosin resin, polyacrylic acid resin and modified acrylic acid emulsion as linking materials, but rosin and maleic acid modified resin have many problems in terms of gloss, water resistance and stability; acrylic acid copolymerization There is still a gap between organic resins and solvent-based inks in terms of gloss and printability

Method used

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  • Waterborne polyurethane binder and preparation method thereof
  • Waterborne polyurethane binder and preparation method thereof
  • Waterborne polyurethane binder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Before the preparation, the polymer polyol and the amino-terminated polyether are vacuum dehydrated. In a glass flask equipped with a thermometer, a stirrer and a reflux condenser, add a mixture of diisocyanate, polymer polyol, triol and diol, and at the same time add a hydrophilic chain extender, a co-solvent and a catalyst, under nitrogen protection at 80°C for 3 hours; then add amino-terminated polyether to extend the chain, and heat at 75°C for 2.5 hours; after cooling down to 40°C, add a neutralizing agent to form a salt, and neutralize for 6 minutes; add 25°C at room temperature Deionized water, disperse under high-speed stirring for 10 minutes; add a small molecule chain extender and react for 1 hour, and then the water-based polyurethane binder can be obtained.

[0026] The specific ratio is as follows:

[0027]

Embodiment 2

[0029] Before the preparation, the polymer polyol and the amino-terminated polyether are vacuum dehydrated. In a glass flask equipped with a thermometer, a stirrer and a reflux condenser, add a mixture of diisocyanate, polymer polyol, triol and diol, and at the same time add a hydrophilic chain extender, a cosolvent and a catalyst, under nitrogen protection at 85°C for 2.5 hours; then add amino-terminated polyether to extend the chain, and heat at 75°C for 2.5 hours; after cooling down to 40°C, add neutralizing agent to form a salt, and neutralize for 6 minutes; add 25°C at room temperature Deionized water, disperse under high-speed stirring for 10 minutes; add a small molecule chain extender and react for 1 hour, and then the water-based polyurethane binder can be obtained.

[0030] The specific ratio is as follows:

[0031]

Embodiment 3

[0033] Before the preparation, the polymer polyol and the amino-terminated polyether are vacuum dehydrated. In a glass flask equipped with a thermometer, a stirrer and a reflux condenser, add diisocyanate, a mixture of polymer polyols, triols and diols, and at the same time add hydrophilic chain extenders, co-solvents and catalysts, under nitrogen protection at 80°C for 3 hours; then add amino-terminated polyether to extend the chain, and heat at 78°C for 2 hours; after cooling down to 40°C, add neutralizing agent to form a salt, and neutralize for 6 minutes; add 25°C at room temperature Deionized water, disperse under high-speed stirring for 10 minutes; add a small molecule chain extender and react for 1 hour, and then the water-based polyurethane binder can be obtained.

[0034] The specific ratio is as follows:

[0035]

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PUM

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Abstract

The invention discloses a waterborne polyurethane binder. The preparation method of the waterborne polyurethane binder comprises the following steps of: reacting 20-50 parts of diisocyanate, 80-140 parts of polymer polyol, 0.5-2 parts of trihydric alcohol, 0.5-2 parts of dihydric alcohol, 4-10 parts of hydrophilic chain extender, 10-30 parts of cosolvent and 0.01-0.1 part of catalyst under the protection of nitrogen gas at 75-90 DEG C for 2-4 hours; then, adding 10-30 parts of amine terminated polyether chain extender for reacting at 70-80 DEG C for 2-3 hours; cooling to 30-40 DEG C, and then, adding 3-6 parts of neutralizing agent for reacting for 5-7 minutes; adding 200-500 parts of dispersing agent at the room temperature, and dispersing for 10-20 minutes while stirring at a high speed; and adding 1-2 parts of small molecular chain extender for reacting for 1-2 hours to obtain the waterborne polyurethane binder. The waterborne polyurethane binder disclosed by the invention has the advantages of better mechanical performance, water resistance and adhesive force, good low-temperature performance, high gloss and good gloss retention, is used for waterborne ink and acquires an excellent effect.

Description

technical field [0001] The invention belongs to the field of connecting material for water-based ink, and relates to a water-based polyurethane connecting material and a preparation method. Background technique [0002] Water-based ink is composed of water-soluble or water-dispersible polymer resin binder, pigment, solvent (water) and related additives. The main difference between water-based inks and solvent-based inks is that solvent-based inks use various organic solvents such as toluene and ethyl acetate as solvents, while water-based inks use water as a solvent. Since water-based ink does not contain volatile organic solvents, it greatly reduces the emission of volatile organic compounds (VOC), thereby reducing air pollution and improving the working environment of printing operators. It is especially suitable for tobacco, alcohol, food, beverages, medicines, Children's toys and other packaging and printing products that require strict sanitary conditions. In addition...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/50C08G18/12C09D11/10C09D11/102
Inventor 吕建平刘润林李彬段启勇孙学武
Owner GUANGDONG YINGKE GRP CO LTD
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