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A kind of antibacterial anionic waterborne polyurethane resin and preparation method thereof

A water-based polyurethane and anion technology, applied in textiles and papermaking, can solve the problems of difficult reaction, high difficulty, serious production pollution, etc., and achieve the effects of safe source, improved water resistance, and improved stability

Active Publication Date: 2019-07-26
HEFEI KETIAN WATERBORNE TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Waterborne polyurethane materials are familiar to more and more people because of their environmental protection and safety properties. At present, waterborne polyurethanes mainly include cationic, anionic and nonionic types. Anionic types include sulfonic acid type and carboxylic acid type. Carboxylic acid type The preparation method of waterborne polyurethane mainly relies on hydrophilic chain extenders such as dimethylolpropionic acid (DMPA) and dimethylolbutyric acid (DMBA) to prepare, but the production process of these two hydrophilic chain extenders is Produces heavy pollution, 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 has a large solubility in acetone, and the viscosity is also small during the synthesis process, but The production pollution is serious, and the synthesis technology is complex and difficult. At present, there are few large-scale manufacturers in China

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Dehydrate 80g of polytetrahydrofuran ether polyol (molecular weight: 3000) at 105°C for 1 hour, then cool down to 50°C, add 15g of toluene diisocyanate, raise the temperature to 90°C and keep it warm for 3 hours, measure the NCO content in two hours, and reach the theoretical value After cooling down to 50°C, add 6g of chlorogenic acid and 1.5g of ethylene glycol to react at 80°C for 2h, cool down to 50°C, then add 0.2g of organic bismuth Coscat83 and 2ml of acetone to adjust the viscosity, and react at 70°C for 2.5h After the reaction is over, measure the NCO content, then lower the temperature to 0°C, add 2.32g of triethylamine for neutralization, after 30 minutes of neutralization, add deionized water under high-speed shearing, disperse for 2 minutes, and then slowly add 2g of ethylene diethylamine amine, and the acetone in the system was distilled off under reduced pressure to obtain aqueous polyurethane resin emulsion sample 1 with a solid content of 34%.

[0038] ...

Embodiment 2

[0040] Dehydrate 78g of polyethylene oxide polyol (molecular weight: 3000) at 105°C for 1 hour, then cool down to 50°C, add 15g of isophorone diisocyanate, raise the temperature to 90°C and keep it warm for 3 hours, then measure NCO in two hours After reaching the theoretical value, cool down to 50°C, then add 8g of chlorogenic acid and 1.5g of glycerin to react at 80°C for 2 hours, cool down to 50°C, then add 0.15g of organic bismuth 1610 and 2ml of acetone to adjust the viscosity, at 70°C React for 2.5 hours, measure the NCO content after the reaction is completed, then cool down to 0°C, add 2.12g of triethylamine for neutralization, after neutralization for 30 minutes, add deionized water under high-speed shear, disperse for 2 minutes, and then slowly add 8g of triethylamine Polyetheramine, acetone in the system was distilled off under reduced pressure to obtain waterborne polyurethane resin sample 2 with a solid content of 36%.

[0041] The bacteriostatic rate of the aqueo...

Embodiment 3

[0043] Dehydrate 75g of polyester ether polyol (molecular weight: 3000) at 105°C for 1 hour, then cool down to 50°C, add 15g of 1,6-hexamethylene diisocyanate, raise the temperature to 90°C and keep it warm for 3 hours, then measure the NCO content in two hours After reaching the theoretical value, cool down to 50°C, then add 7.2g of chlorogenic acid and 1.5g of ethylene glycol to react at 80°C for 2 hours, cool down to 50°C, then add 0.2g of organic bismuth 2010 and 2ml of acetone to adjust the viscosity, at 70°C React at ℃ for 2.5h, measure the NCO content after the reaction is over, then cool down to 0℃, add 2.51g of triethylamine for neutralization, after 30 minutes of neutralization, add deionized water under high-speed shear, disperse for 2min, then slowly add 5g of isophorone diamine, the acetone in the system was distilled off under reduced pressure to obtain water-based polyurethane resin sample 3 with a solid content of 34%.

[0044] The bacteriostatic rate of aqueou...

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Abstract

The invention provides an antibacterial anionic waterborne polyurethane resin and a preparation method thereof. The waterborne polyurethane includes the following raw materials by weight: 70-85 partsof macromolecular polyol; 10-20 parts of polyisocyanate; 4.5-12.5 parts of a hydrophilic chain extender; 0.5-2 parts of a small molecular alcohol chain extender; 1-10 parts of an amine chain extender;0.01-0.5 part of a catalyst; and 2-5 parts of a salt-forming agent. Specifically, the hydrophilic chain extender is chlorogenic acid. The method provided by the invention employs chlorogenic acid toreplace carboxylic acid type hydrophilic chain extender, and greatly improves the water resistance, chemical resistance and mechanical strength of the obtained waterborne polyurethane. Chlorogenic acid has the characteristics of safe source, environmental friendliness and no pollution, can be used as a hydrophilic chain extender, is easily soluble in acetone, and can be better react with polyisocyanate so as to improve the polymerization reaction stability. Chlorogenic acid has antibacterial and antivirus effects, and the obtained waterborne polyurethane can reach anticorrosion and sterilization effects without additional bactericide.

Description

technical field [0001] The invention relates to the technical field of polymers, and specifically discloses an antibacterial anionic waterborne polyurethane resin and a preparation method thereof. Background technique [0002] Waterborne polyurethane materials are familiar to more and more people because of their environmental protection and safety properties. At present, waterborne polyurethanes mainly include cationic, anionic and nonionic types. Anionic types include sulfonic acid type and carboxylic acid type. Carboxylic acid type The preparation method of waterborne polyurethane mainly relies on hydrophilic chain extenders such as dimethylolpropionic acid (DMPA) and dimethylolbutyric acid (DMBA) to prepare, but the production process of these two hydrophilic chain extenders is Produces heavy pollution, 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;...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/48C08G18/34C08G18/32C08G18/50C08G18/61C08G18/65D06N3/14
CPCC08G18/348C08G18/48C08G18/482C08G18/4833C08G18/4854C08G18/5021C08G18/61C08G18/6511C08G18/6529C08G18/6541C08G18/6607C08G18/6618C08G18/6625C08G18/6674C08G18/6677C08G18/6685C08G18/6692D06N3/14
Inventor 戴家兵汪飞李维虎王浩志
Owner HEFEI KETIAN WATERBORNE TECH CO LTD
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