Antibacterial cationic waterborne polyurethane resin and preparation method thereof

A water-based polyurethane, cationic technology, used in polyurea/polyurethane coatings, antifouling/underwater coatings, coatings, etc., can solve problems such as human injury, achieve the effect of source safety, improve cross-linking degree, and improve stability

Active Publication Date: 2018-07-20
HEFEI KETIAN WATERBORNE TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 120g of polyester polyol with a molecular weight of 2000 and 128g of toluene diisocyanate were heated to 85°C for 2 hours, and the NCO content was measured for two hours. After reaching the theoretical value, the temperature was lowered to 40°C, and 1.8g of 1,4-butanediene was added. Alcohol, 1g of chlorogenic acid and a small amount of acetone to adjust the viscosity, heat up to 80°C for 2 hours, add Coscat83 catalyst and 1mL of acetone after the time is up, heat up to 60°C for 3h, then test the NCO value, cool down and add 2mL after reaching the theoretical value Acetone reduces the viscosity, lowers the temperature to 40°C, then slowly adds 6.2g of N-methyldiethanolamine in 30 minutes by dropping, reacts at 40°C for 1 hour, and then cools down to 0-5°C to obtain a prepolymer; Pour the prepolymer into a plum blossom barrel, then add 3.13g of glacial acetic acid at a speed of 800r / min, and after dispersing for 10 minutes, increase the speed to 1800r / min, add 213g of dei...

Embodiment 2

[0023] 165g of polyoxypropylene diol with a molecular weight of 1000 and 136g of toluene diisocyanate were heated to 85°C for 4 hours, and the NCO content was measured once every two hours. After reaching the theoretical value, the temperature was lowered to 40°C, and 6.2g of 1,6 - Hexylene glycol, 1.5g of chlorogenic acid and a small amount of acetone to adjust the viscosity, raise the temperature to 80°C for 2 hours, add organic bismuth 2010 catalyst and 1mL of acetone after the time is up, raise the temperature to 60°C for 3 hours, then test the NCO value to reach the theoretical value After cooling down and adding 1mL of acetone to reduce the viscosity, then slowly add 5.3g of N-methyldiethanolamine in 30min by dropwise, react at 40°C for 1h, then cool down to 0-5°C to obtain prepolymerized Pour the prepolymer into a plum blossom bucket, then add 2.67g of glacial acetic acid at a speed of 800r / min, and after dispersing for 10min, increase the speed to 2000r / min, add 254g of...

Embodiment 3

[0027] 132g of polytetrahydrofuran diol with a molecular weight of 2000 and 129.5g of toluene diisocyanate were heated to 85°C for 4 hours, and the NCO content was measured once every two hours. After reaching the theoretical value, the temperature was lowered to 40°C, and 3g of diethylene diethylene oxide was added. Diol, 0.8g of chlorogenic acid and a small amount of acetone to adjust the viscosity, raise the temperature to 80°C for 2 hours, add Coscat83 catalyst and 1mL of acetone after the time is up, raise the temperature to 60°C for 3 hours, then test the NCO value, and cool down after reaching the theoretical value. Add 1mL of acetone to reduce the viscosity, then slowly add 5.8g of N-methyldiethanolamine in 30min by dropwise, react at 40°C for 1h, then cool down to 0-5°C to obtain a prepolymer; Pour the polymer into a plum blossom bucket, then add 2.92g of glacial acetic acid at a speed of 800r / min, and after dispersing for 10min, increase the speed to 2000r / min, add 23...

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Abstract

The invention provides an antibacterial cationic waterborne polyurethane resin and a preparation method thereof. The preparation method comprises the steps of: reacting macromolecular polyol with polyisocyanate at 80-95DEG C for 2-4h; then adding a small molecular alcohol chain extender and chlorogenic acid for reaction at 75-85DEG C for 1-3h; then adding a catalyst for reaction at 55-65DEG C for2-4h; adding a hydrophilic chain extender by starved charging technique, carrying out reaction at 35-45DEG C for 0.5-1.5h, performing cooling to a temperature ranging from -5DEG C to 5DEG C, adding aneutralizer for neutralizing, adding deionized emulsified water and dispersing the substances uniformly, and then conducting reduced pressure distillation so as to obtain the cationic waterborne polyurethane resin. According to the invention, chlorogenic acid is introduced to a cationic waterborne polyurethane molecular chain by chemical bonding, the influence of functional additives to the mechanical properties of waterborne polyurethane can be avoided, and also a good antibacterial effect can be realized.

Description

technical field [0001] The invention relates to the technical field of polymers, and specifically discloses an antibacterial cationic waterborne polyurethane resin and a preparation method thereof. Background technique [0002] Water-based polyurethane is a water-based material based on polyurethane. Because it is rich in nutrients for microbial growth, as long as environmental conditions such as ambient temperature exist that are suitable for the survival of microorganisms, microorganisms will multiply and the original properties of the material will be destroyed. The quality declines, or even spoils and becomes scrapped. Therefore, anti-mildew and fungicides must be added to water-based polyurethane. The modes of action of anti-mold and fungicides are: 1. Inhibit the production of energy; 2. Interfere with the biological formation of pathogenic bacteria; and destroy the cell structure. Commonly used anti-mold and fungicides include substituted aromatic hydrocarbons, hete...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/48C08G18/44C08G18/42C08G18/34C09D175/08C09D175/06C09D5/14
CPCC08G18/348C08G18/42C08G18/44C08G18/4825C08G18/4854C08G18/664C08G18/6655C08G18/6659C08G18/6674C08G18/6688C08G18/6692C09D5/14C09D175/06C09D175/08
Inventor 戴家兵汪飞李维虎王浩志
Owner HEFEI KETIAN WATERBORNE TECH CO LTD
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