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A kind of antibacterial cationic water-based polyurethane resin and preparation method thereof

A water-based polyurethane, cationic technology, used in polyurea/polyurethane coatings, antifouling/underwater coatings, and biocide-containing paints, etc., can solve problems such as human injury, achieve source safety, improve water resistance, and improve stability Effect

Active Publication Date: 2019-07-16
HEFEI KETIAN WATERBORNE TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this preservative is corrosive and has great harm to the human body.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

Embodiment 2

[0023] 165g of polyoxypropylene glycol with a molecular weight of 1000 and 136g of toluene diisocyanate were heated to 85°C for 4h, and the NCO content was measured every two hours. After reaching the theoretical value, the temperature was reduced to 40°C, and 6.2g of 1,6 was added. -Hexanediol, 1.5g of chlorogenic acid and a small amount of acetone to adjust the viscosity, heat up to 80℃ and react for 2h, add organic bismuth 2010 catalyst and 1mL acetone after reaching the time, heat up to 60℃ and react for 3h, then test the NCO value to reach the theoretical value After the value is reached, the temperature is lowered and 1mL of acetone is added to reduce the viscosity, and then 5.3g of N-methyldiethanolamine is slowly added in a dropwise manner within 30 minutes, reacted at 40°C for 1 hour, and then cooled to 0-5°C to obtain a prepolymer Pour the prepolymer into a plum bucket, then add 2.67g of glacial acetic acid at a speed of 800r / min, disperse for 10min, increase the speed...

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 4h, and the NCO content was measured every two hours. After reaching the theoretical value, the temperature was reduced to 40°C, and 3g of diethyl ether was added. Diol, 0.8g of chlorogenic acid and a small amount of acetone were used to adjust the viscosity. The temperature was raised to 80℃ and reacted for 2h. After reaching the time, Coscat83 catalyst and 1mL acetone were added. The temperature was raised to 60℃ and reacted for 3h. Then the NCO value was tested. 1mL of acetone was added to reduce the viscosity, and then 5.8g of N-methyldiethanolamine was slowly added dropwise within 30 minutes, reacted at 40°C for 1 hour, and then cooled to 0-5°C to obtain a prepolymer; Pour the polymer into a plum bucket, then add 2.92g of glacial acetic acid at a speed of 800r / min, disperse for 10min, increase the speed to 2000r / min, add 236g of deionized emulsi...

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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 high molecular polymers, and specifically discloses an antibacterial cationic waterborne polyurethane resin and a preparation method thereof. Background technique [0002] Waterborne polyurethane is a waterborne material based on polyurethane. Because it is rich in nutrients for the growth of microorganisms, as long as environmental conditions such as environmental temperature and suitable for the survival of microorganisms exist, microorganisms will multiply and destroy the original properties of the material. The quality has declined, even corrupted and deteriorated and scrapped. Therefore, waterborne polyurethane must be added with anti-mold and fungicides. The mode of action of anti-mold and fungicides are: 1. Inhibit energy production; 2. Interfere with the biological formation of pathogenic bacteria; and destroy cell structure. Commonly used anti-mold and bactericides include substituted aromatic hydro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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