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Water-based antibacterial and antiviral anionic polyurethane resin and preparation method thereof

A polyurethane resin and anti-virus technology, which is applied in the field of water-based antibacterial and anti-virus anionic polyurethane resin and its preparation, can solve the problems of production pollution, complex synthesis technology, and no bactericidal effect

Inactive Publication Date: 2021-06-01
江苏华缘高科股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Anionic waterborne polyurethane includes sulfonic acid type and carboxylic acid type. The preparation method of carboxylic acid type waterborne polyurethane mainly relies on hydrophilic chain extenders such as dimethylol propionic acid (DMPA) and dimethylol butyric acid (DMBA) to Preparation, but these two kinds of hydrophilic chain extenders produce heavy pollution in the production process. DMPA is currently the most widely used, but because it is difficult to dissolve in acetone, it is difficult to react in the synthesis process of water-based polyurethane; DMBA It has high solubility in acetone and low viscosity during the synthesis process, but the production pollution is serious, the synthesis technology is complicated and difficult, and there are few large-scale manufacturers in China at present.
[0005] At present, many anionic water-based polyurethanes do not have a bactericidal effect, so this problem needs to be solved urgently

Method used

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  • Water-based antibacterial and antiviral anionic polyurethane resin and preparation method thereof
  • Water-based antibacterial and antiviral anionic polyurethane resin and preparation method thereof
  • Water-based antibacterial and antiviral anionic polyurethane resin and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] A kind of preparation method of waterborne antibacterial and antiviral anionic polyurethane resin

[0044] S1. Add 3g of caffeic acid and 1.5g of zinc hydroxide into a beaker filled with 10g of 50-60°C water and mix them, and stir evenly to obtain 14.5g of caffeic acid zinc solution with ph=9.

[0045] S2. Put 300g of polycarbonate polyol into a 1000mL four-necked flask equipped with a thermometer, agitator, and reflux condenser, raise the temperature to 110°C, dehydrate for 1h under a vacuum of >-0.09MPa, cool down to 60°C, and add 14.5g of zinc caffeate solution, stirred evenly, put in 70g of isophorone diisocyanate, and reacted at 90°C for 2h. The temperature was lowered to 70° C., 5 g of small molecule chain extender ethylene glycol was added, and the reaction was continued at 70° C. for 1 hour. Cool down to <50°C, add catalyst organic bismuth 0.5g and acetone 40ml, stir and raise the temperature to 75°C for 4h. Then cool down to 20°C, add 80ml of acetone, and sti...

Embodiment 2

[0049] A kind of preparation method of waterborne antibacterial and antiviral anionic polyurethane resin

[0050] S1. Add 4g of caffeic acid and 1.75g ​​of zinc hydroxide into a beaker filled with 10g of 50-60°C water and mix, and stir evenly to obtain 15.75g of caffeic acid zinc solution with ph=8.7.

[0051] S2. Put 310g of polytetrahydrofuran ether polyol into a 1000mL four-necked flask equipped with a thermometer, a stirrer, and a reflux condenser, raise the temperature to 110°C, dehydrate under a vacuum >-0.09MPa for 1h, cool down to 60°C, and add 15.75g of zinc caffeate solution was stirred evenly, then 72g of isophorone diisocyanate was added, and reacted at 90°C for 2h. The temperature was lowered to 70°C, 6g of small molecule chain extender ethylene glycol was added, and the reaction was continued at 70°C for 1 hour. Cool down to <50°C, add catalyst organic bismuth 0.7g and acetone 40ml, stir and raise the temperature to 75°C for 4h. Then cool down to 20°C, add 80ml o...

Embodiment 3

[0055] A kind of preparation method of waterborne antibacterial and antiviral anionic polyurethane resin

[0056] S1. Add 4.5g of caffeic acid and 1.9g of zinc hydroxide into a beaker filled with 10g of 50-60°C water and mix, and stir evenly to obtain 16.4g of caffeic acid zinc solution with ph=8.8.

[0057] S2. Put 315g of polytetrahydrofuran ether polyol into a 1000mL four-necked flask equipped with a thermometer, a stirrer, and a reflux condenser, raise the temperature to 110°C, dehydrate under a vacuum >-0.09MPa for 1h, cool down to 60°C, and add 16.4g of zinc caffeate solution was stirred evenly, and then 56g of hexamethylene diisocyanate was added, and reacted at 90°C for 2h. The temperature was lowered to 70°C, 7.8g of small molecule chain extender 1,4-butanediol was added, and the reaction was continued at 70°C for 1 hour. Cool down to <50°C, add catalyst organic bismuth 0.8g and acetone 40ml, stir and raise the temperature to 75°C for 4h. Then cool down to 20°C, add...

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Abstract

The invention discloses water-based antibacterial and antiviral anionic polyurethane resin and a preparation method thereof. The polyurethane resin is prepared from the following raw materials in parts by mass: 30-35 parts of macromolecular polyol, 5-10 parts of polyisocyanate, 2-6 parts of a hydrophilic chain extender, 1-2 parts of zinc hydroxide, 0.5-2 parts of a micromolecular alcohol chain extender, 1-2 parts of an amine chain extender, 0.01-0.5 parts of a catalyst, 5-12 parts of an organic solvent and 45-55 parts of deionized water, wherein the hydrophilic chain extender is caffeic acid. The caffeic acid is used as a hydrophilic chain extender, is easily dissolved in the organic solvent, can fully react with polyisocyanate, improves the polymerization reaction stability, has wide antibacterial and antiviral activity, can absorb ultraviolet rays, and can improve the coloring power of the waterborne polyurethane resin. Zn ions have long-acting antibacterial activity. The caffeic acid and zinc hydroxide are subjected to a neutralization reaction to obtain zinc caffeate solution modified waterborne polyurethane with Zn ions, so that the waterborne polyurethane can obtain excellent antibacterial and antiviral capacities without adding an antibacterial additive and shows better storage stability.

Description

technical field [0001] The invention belongs to the field of polymer materials, and in particular relates to a water-based antibacterial and antiviral anionic polyurethane resin and a preparation method thereof. Background technique [0002] Polyurethane is widely used in leather finishing, coatings, adhesives and other fields due to its advantages such as wide range of softness and hardness, low temperature resistance, good flexibility and strong adhesion. However, with the promulgation of environmental safety laws and regulations in various countries, many countries have restricted the application of solvent-based polyurethane. [0003] Since the continuous phase of water-based polyurethane is water, it is safe and easy to store and store, and it is convenient to use and low in cost. It is superior to solvent-based polyurethane in some properties, so the research and production of water-based polyurethane has been paid attention to by countries all over the world, and has...

Claims

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Application Information

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IPC IPC(8): C08G18/12C08G18/66C08G18/48C08G18/44C08G18/34C08G18/32C08L75/04C08L75/08
CPCC08G18/12C08G18/6659C08G18/6651C08G18/664C08G18/6692C08G18/6674C08G18/6685C08G18/44C08G18/4854C08G18/3206C08G18/348C08G18/3228C08L75/04C08L75/08
Inventor 李浩扬李桂军张锋冯会生甄雷雷
Owner 江苏华缘高科股份有限公司
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