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Preparation method of rosin-based TDI type antibacterial polyurethane

A polyurethane and rosin-based technology, which is applied in the field of preparation of antibacterial polyurethane, can solve problems such as life and health threats, easy growth or reproduction of bacteria, and disease transmission, and achieve good antibacterial properties, wide application, and good antibacterial properties.

Inactive Publication Date: 2019-11-19
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Polyurethane materials can also be used in medical and hygiene, food packaging and other fields, but in the process of use or storage, under certain temperature and humidity conditions, its surface is very easy to grow or reproduce bacteria, thereby spreading diseases and posing a huge threat to people's life and health

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Dissolve 100.0 parts by mass of acrylic rosin GMA ester (RAG) with 400 parts by mass of analytically pure acetone, add 0.75 parts by mass of chemically pure dibutyltin dilaurate (DBTDL), disperse evenly, and transfer to a tube equipped with a stirring bar and a reflux condenser. , thermometer and nitrogen protection device in the reactor, at 400r min -1 Stirring under low temperature, after heating to 30 ℃ in water bath, add 50.3 parts by mass of toluene diisocyanate (TDI) with a purity of 99% for reaction, and when the -NCO content drops to the theoretical value, add 12.9 parts by mass of a hydrophilic diisocyanate (TDI) with a purity of 99%. Chain agent N-methyldiethanolamine (MDEA), react until the -NCO content drops to 0, lower the reaction temperature to 25°C, add 6.0 parts by mass of analytically pure glacial acetic acid for neutralization for 20 minutes, add 30mL of deionized water, and heat at 1200rmin -1 Emulsify at a rotating speed of 15 minutes, and finally r...

Embodiment 2

[0018] Dissolve 100.0 parts by mass of acrylic rosin GMA ester (RAG) with 400 parts by mass of analytically pure acetone, add 0.75 parts by mass of chemically pure dibutyltin dilaurate (DBTDL), disperse evenly, and transfer to a tube equipped with a stirring bar and a reflux condenser. , thermometer and nitrogen protection device in the reactor, at 400r min -1 Stirring under low temperature, after heating to 30 ℃ in water bath, add 50.3 parts by mass of toluene diisocyanate (TDI) with a purity of 99% for reaction, and when the -NCO content drops to the theoretical value, add 14.6 parts by mass of a hydrophilic diisocyanate with a purity of 99%. Chain agent N-methyldiethanolamine (MDEA), react until the -NCO content is reduced to 0, lower the reaction temperature to 25°C, add 7.0 parts by mass of analytically pure glacial acetic acid for neutralization for 20 minutes, add 30mL of deionized water, and heat at 1300rmin -1 Emulsify at a rotating speed of 15 minutes, and finally re...

Embodiment 3

[0020] Dissolve 100.0 parts by mass of acrylic rosin GMA ester (RAG) with 400 parts by mass of analytically pure acetone, add 0.75 parts by mass of chemically pure dibutyltin dilaurate (DBTDL), disperse evenly, and transfer to a tube equipped with a stirring bar and a reflux condenser. , thermometer and nitrogen protection device in the reactor, at 400r min -1 Stirring under low temperature, after heating to 30°C in a water bath, 50.3 parts by mass of toluene diisocyanate (TDI) with a purity of 99% was added for reaction. Chain agent N-methyldiethanolamine (MDEA), react until the -NCO content is reduced to 0, lower the reaction temperature to 25°C, add 8.0 parts by mass of analytically pure glacial acetic acid for neutralization for 20 minutes, add 30mL of deionized water, and heat at 1200rmin -1 Emulsify at a rotating speed of 15 minutes, and finally remove acetone through decompression distillation to obtain a water-based polyurethane emulsion (RWPU) with a solid content of ...

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PUM

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Abstract

The invention discloses a preparation method of rosin-based TDI type antibacterial polyurethane. Low-price, easily available and natural renewable resource rosin which is used as a raw material is modified to obtain rosin-based polyol (RAG), the RAG reacts with toluene diisocyanate (TDI) in acetone used as a solvent to generate a prepolymer, and N-methyldiethanolamine (MDEA) is added to the systemas a hydrophilic chain extender to successfully prepare an antibacterial rosin-based TDI type waterborne polyurethane emulsion. Inhibition zone technology test shows that the waterborne polyurethanehas a significant killing effect on Escherichia coli and Staphylococcus aureus, and has a good antibacterial performance. The antibacterial polyurethane makes the rosin widely applied, and is expected to be widely used in fields of medical and health, biological engineering and food packaging.

Description

technical field [0001] The invention relates to a method for preparing antibacterial polyurethane by using rosin as raw material. [0002] technical background [0003] Polyurethane (PU) is a synthetic resin prepared by the reaction of hydroxyl polyols, isocyanates and small molecule chain extenders. Due to its good mechanical properties and processability, polyurethane materials are widely used in adhesives, coatings, elastomers, foams and fiber and many other fields. There are two types of polyols commonly used in the preparation of polyurethanes: polyester polyols and polyether polyols, most of which come from petroleum resources. In recent years, with the increasing requirements of environmental protection, the preparation of polyurethane from biomass has attracted more and more attention. Rosin is a rich natural renewable forest resource. The double bond and carboxylic acid group in the molecular structure of rosin can be modified to produce a new type of rosin-based d...

Claims

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Application Information

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IPC IPC(8): C08G18/76C08G18/67C08G18/32C09F1/04
CPCC08G18/3275C08G18/67C08G18/7614C09F1/04
Inventor 张发爱单建行余彩莉邵金涛
Owner GUILIN UNIVERSITY OF TECHNOLOGY
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