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Preparation method of antibacterial polyurethane

A technology of polyurethane and antibacterial activity, which is applied in the field of preparation of antibacterial polyurethane, which can solve the problems such as the degree of quaternization of polyurethane and the difficulty of controlling the reaction, and achieve strong sterilization, mildew and moth resistance, easy control of reaction conditions, and antibacterial effect Good results

Inactive Publication Date: 2010-11-10
LUDONG UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method is to carry out quaternization with halogenated hydrocarbon after polyurethane is blocked, the reaction is not easy to control, and it is difficult to ensure that the synthetic polyurethane has a high degree of quaternization

Method used

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  • Preparation method of antibacterial polyurethane
  • Preparation method of antibacterial polyurethane

Examples

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Embodiment 1

[0029] Example 1: In the prepolymerization stage, accurately weigh 1 mole of polytetrahydrofuran (molecular weight: 1800) in a three-necked flask, heat and vacuum dehydrate, add 2.2 moles of MDI after cooling to about 30°C, stir continuously and raise the temperature to 60-70°C, maintain this temperature for about 30 minutes, add 2500ppm (relative to the amount of 1 mole of polytetrahydrofuran) N-methyl-N-dodecyl-N, N-dihydroxyethylammonium bromide, and react for 10 minutes, the prepolymer is obtained. In the chain extension reaction stage, first dilute the prepolymer with N,N-dimethylamide to a concentration of about 50%, then raise the temperature to 70°C, add 0.8 moles of chain extender ethylenediamine, and wait until the reaction liquid is glycerol-like, Enter the termination reaction stage, then add 0.2 moles of terminator diethylamine in several times, the sum of the amount of chain extender ethylenediamine and terminator diethylamine is 1 mole, cool the reaction solutio...

Embodiment 2

[0030] Example 2: In the prepolymerization stage, accurately weigh 1 mole of polytetrahydrofuran (molecular weight: 1800) in a three-necked flask, heat and vacuum dehydrate, and add 2.2 moles of diphenylmethane-4,4' after cooling to about 30°C Diisocyanate, keep stirring and raise the temperature to 60-70°C, maintain this temperature for 30 minutes, add 5000ppm (relative to the amount of 1 mole of polytetrahydrofuran) N-methyl-N-n-butyl-N, N dihydroxyethyl ammonium bromide and react for 10 minutes to obtain the prepolymer. In the chain extension reaction stage, first dilute the prepolymer with N,N-dimethylamide to a concentration of about 50%, then raise the temperature to 70°C, add 0.8 moles of chain extender ethylenediamine, and wait until the reaction liquid is glycerol-like, Enter the termination reaction stage, then add 0.2 mole of terminator diethylamine in several times, the sum of the amount of chain extender ethylenediamine and terminator diethylamine is 1 mole, cool ...

Embodiment 3

[0031] Example 3: In the prepolymerization stage, accurately weigh 1 mole of polytetrahydrofuran (molecular weight: 1800) in a three-necked flask, heat and vacuum dehydrate, and add 2.2 moles of diphenylmethane-4,4' after cooling to about 30°C Diisocyanate, keep stirring and raise the temperature to 60-70°C, maintain this temperature for 30 minutes, add 10000ppm (relative to the amount of 1 mole of polytetrahydrofuran) N-methyl-N-benzyl-N, N-dihydroxyethyl ammonium chloride and react for 10 minutes to obtain the prepolymer. In the chain extension reaction stage, first dilute the prepolymer with N,N-dimethylamide (DMF) to a concentration of about 50%, then heat up to 70°C, add 0.8 moles of chain extender ethylenediamine, and wait until the reaction liquid is glycerol After that, enter the termination reaction stage. At this time, add 0.2 mole of terminator diethylamine in multiple times, the sum of the amount of chain extender ethylenediamine and terminator diethylamine is 1 mo...

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Abstract

The invention relates to a preparation method of antibacterial polyurethane, which belongs to the technical field of manufacture of organic polymer materials with antibacterial function. The preparation method comprises the pre-polymerization reaction, the chain extension reaction and the termination reaction, diphenylmethane-4,4'-diisocyanate and polytetrahydrofuran are taken as basic raw materials, and the preparation method is characterized by adding 500-10000ppm of quaternary ammonium salt with antibacterial activity in the pre-polymerization reaction stage. The preparation method has the advantages of wide sources of the raw materials, easy control of reaction conditions and low cost, and the produced antibacterial polyurethane has the advantages of good antibacterial effect and long-term keeping of the antibacterial activity.

Description

(1) Technical field: [0001] The invention relates to a preparation method of polyurethane, in particular to a preparation method of antibacterial polyurethane with antibacterial function. (two) background technology: [0002] With the rapid development of the polymer material industry, polyurethane is widely used in food processing, packaging industry and medical and health fields due to its excellent performance and low price. However, during the use and storage of polymer material products, bacteria are very easy to grow and reproduce under suitable temperature and humidity conditions, which seriously threaten people's health. Therefore, scientists have been working on the selection of antibacterial agents and the research on antibacterial processing methods for many years. Bacteria adhere to the surface of biological materials, grow and form bacterial biofilms together with their secreted extracellular matrix. The methods to prevent the formation of bacterial biofilm ar...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/66C08G18/48C08G18/40C08G18/10
Inventor 王春华曲荣君纪春暖马千里刘希光孙昌梅孙言志王玉鹏
Owner LUDONG UNIVERSITY
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