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Pyridine quaternary ammonium salt polyurethane and preparation method thereof

A technology of pyridinium quaternary ammonium salt and polyurethane, which is applied in the field of pyridinium quaternary ammonium salt polyurethane and its preparation, which can solve the problems of limited application fields, poor stability and antibacterial properties of water-based polyurethane, and achieve improved stability, enhanced antibacterial activity, and stability and strong antibacterial activity

Inactive Publication Date: 2011-05-25
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention solves the technical problems of poor stability and antibacterial properties of water-based polyurethane and limited application fields existing in the prior art

Method used

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  • Pyridine quaternary ammonium salt polyurethane and preparation method thereof
  • Pyridine quaternary ammonium salt polyurethane and preparation method thereof
  • Pyridine quaternary ammonium salt polyurethane and preparation method thereof

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preparation example Construction

[0030] The present invention also provides a kind of preparation method of pyridinium quaternary ammonium salt polyurethane, comprises the following steps:

[0031] 1) mixing polypropylene glycol (PPG) with diphenylmethane diisocyanate (MDI), and performing a condensation reaction to obtain an isocyanate group-terminated prepolymer 1;

[0032] 2) Add tetraphenylethylene glycol (TPED) to the isocyanate group-terminated prepolymer 1 obtained in step 1), and react in the presence of a catalyst to obtain a benzene ring-containing prepolymer 2;

[0033] 3) Mix the benzene ring-containing prepolymer 2 obtained in step 2) with vinylpyridine in proportion, and react with the solvent to obtain the pyridine group-containing prepolymer 3;

[0034] 4) adding halogenated hydrocarbon or hydrohalic acid to the pyridine group-containing prepolymer 3 obtained in step 3), to obtain the pyridine quaternary ammonium salt polyurethane.

[0035] The preparation mechanism of the pyridine quaternary...

Embodiment 1

[0053] (1) Add 120 g of PPG (molecular weight 2000) and 20 g of MDI into a 500 mL four-neck flask, heat to 75° C. for 3 hours under the protection of nitrogen, and cool to 25° C. to obtain product A1.

[0054] (2) Add 175g of product A, 15g of TPED, 0.5g of dibutyltin dilaurate and 180mL of MEK into a 500mL four-neck flask, and stir at a constant temperature of 25°C for 24 hours. The obtained product was repeatedly suction-filtered three times with methanol as a solvent, and vacuum-dried at 4° C. to obtain product B1.

[0055] (3) Add 100 g of product B1 into a 500 mL four-neck flask, add DMF 10 g and vinylpyridine 10 g in turn under nitrogen protection, and then place it in a constant temperature water bath at 75°C for 5 hours to obtain product C1.

[0056] (4) Add 25 g of product C1 into a 500 mL four-neck flask, add 2.0 g of hydrobromic acid, and perform quaternization reaction for 24 hours. Evaporate with a rotary evaporator until the volume of the residue is 30%, and dry...

Embodiment 2

[0059] (1) Add 100 g of PPG (molecular weight: 2000) and 25 g of MDI into a 500 mL four-necked flask, and heat to 75° C. for 3 hours under the protection of nitrogen; cool to 25° C. to obtain product A2.

[0060] (2) Add 275g of reaction product A, 14.65g of TPED, 0.5g of stannous octoate and 180mL of MEK into a 500mL four-neck flask, and stir at a constant temperature of 25°C for 24 hours. The obtained product was repeatedly suction-filtered three times with methanol as a solvent, and vacuum-dried at 4° C. to obtain product B2.

[0061] (3) Add 100 g of product B2 to a 500 mL four-neck flask, add DMF 10 g and vinylpyridine 10 g in sequence under nitrogen protection, and then place it in a constant temperature water bath at 75°C for 5 hours to obtain product C2.

[0062] (4) Add 25 g of the product C2 into a 500 mL four-neck flask, add 2.0 g of hydrobromic acid, and perform quaternization for 24 hours. Evaporate with a rotary evaporator until the volume of the residue is 20%,...

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Abstract

The invention provides pyridine quaternary ammonium salt polyurethane, which comprises constitutional units shown in formulas 1, 2 and 3, wherein n is an integer from 20 to 80, and X is halogen atom; and the molecular weight of the pyridine quaternary ammonium salt polyurethane is 10,000 to 80,000. The invention also provides a preparation method for the pyridine quaternary ammonium salt polyurethane, which comprises the following steps of: performing condensation on polypropylene glycol and 4,4'-diphenylmethane diisocyanate to obtain prepolymer 1 taking isocyanate as a terminal group; performing chain extension on resin by adopting 1,1,2,2-tetraphenyl-1,2-ethanediol, and adding vinyl pyridine; and performing quaternary ammonium. The pyridine quaternary ammonium salt polyurethane has lipophilicity and hydrophily, and improves antibiotic property on the premise of keeping better ageing resistance and scratch resistance.

Description

technical field [0001] The invention relates to a pyridine quaternary ammonium salt polyurethane and a preparation method thereof. Background technique [0002] Quaternary ammonium salt is a very efficient antibacterial agent. The quaternary ammonium salt antibacterial agent used in the prior art usually includes dodecylpyridinium chloride, dodecyldimethylbenzyl ammonium chloride and dodecyl ammonium chloride. trimethylammonium bromide. Each group in the molecular structure of the quaternary ammonium salt has a great effect on the antibacterial effect. [0003] The hydrophilic group contained in cationic waterborne polyurethane is cationic, which has good adhesion to anionic substrates such as glass and leather, and is not sensitive to water hardness. It can be used under acidic conditions. The cationic system also has Anti-fouling effect. Cationic waterborne polyurethane can be divided into amine salt and quaternary ammonium salt according to its structure. In the prior...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/83C08G18/76C08G18/48
Inventor 李红
Owner BYD CO LTD
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