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Zwitterionic polyester diol and preparation method thereof

A technology of polyester diol and zwitterion, which is applied in the field of polyester diol and its preparation, can solve the problems of single structure and performance, less polyester or polyether polyol, etc., and achieve simplified preparation process and comprehensive performance , good water resistance effect

Active Publication Date: 2015-01-07
河北诚信众诚科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are very few types of polyester or polyether polyols containing zwitterionic groups currently available, and the structure and performance are relatively simple, and the preparation technology needs to be further improved.
There are few reports on the introduction of zwitterionic groups into polyester polyols

Method used

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  • Zwitterionic polyester diol and preparation method thereof
  • Zwitterionic polyester diol and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0033] (1) Preparation of zwitterionic diols by quaternization reaction:

[0034] Dissolve 119g of N-methyldiethanolamine and 122g of 1,3-propane sultone in 200g of acetone, react with stirring at room temperature, and filter to obtain the crude product; wash with acetone to remove unreacted N-methyldiethanolamine in the crude product and 1,3-propane sultone, filtered and dried to obtain a white powder, which is zwitterionic dihydric alcohol; the schematic diagram of its reaction principle is attached figure 1 shown.

[0035] (2) Esterification to prepare zwitterionic polyester diol:

[0036] First feed nitrogen into the reactor, replace the air in the reactor, add 482g of zwitterionic diols prepared in step (1), 146g of adipic acid and 104g of water, heat, when the temperature in the reactor rises to 80 ℃, keep the temperature constant for 4 hours, and then continue to heat up to 200 ℃ for dehydration reaction; when no reaction-generated water distills out under normal pre...

Embodiment 2

[0040] (1) Preparation of zwitterionic diols by quaternization reaction:

[0041]Dissolve 95.2g of N-methyldiethanolamine and 122g of 1,3-propane sultone in 108g of acetone, react with stirring at room temperature, and filter to obtain the crude product; wash with acetone to remove unreacted N-methyl di Ethanolamine and 1,3-propane sultone are filtered and dried to obtain a white powder, which is zwitterionic diol.

[0042] (2) Esterification to prepare zwitterionic polyester diol:

[0043] First feed nitrogen into the reactor, replace the air in the reactor, add 482g of zwitterionic diols prepared in step (1), 90g of oxalic acid and 276g of water, heat, when the temperature in the reactor rises to 70 ℃, keep the temperature constant for 8 hours, and then continue to heat up to 190 ℃ for dehydration reaction; when no reaction-generated water distills out under normal pressure, add the catalyst dibutyltin dilaurate (control the ratio of the catalyst content in the system to 40...

Embodiment 3

[0047] (1) Preparation of zwitterionic diols by quaternization reaction:

[0048] Dissolve 142.8g of N-methyldiethanolamine and 122g of 1,3-propane sultone in 434g of acetone, react with stirring at room temperature, and filter to obtain the crude product; wash with acetone to remove unreacted N-methyl di Ethanolamine and 1,3-propane sultone are filtered and dried to obtain a white powder, which is zwitterionic diol.

[0049] (2) Esterification to prepare zwitterionic polyester diol:

[0050] First feed nitrogen into the reactor, replace the air in the reactor, add 482g of zwitterionic diols prepared in step (1), 148g of phthalic anhydride and 30.5g of water, heat, when the temperature in the reactor When the temperature rises to 70°C, keep the temperature constant for 8 hours, and then continue to heat up to 200°C for dehydration reaction; when no reaction-generated water distills out under normal pressure, add catalyst p-toluenesulfonic acid (control the ratio of catalyst c...

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Abstract

The invention discloses a zwitterionic group-containing polyester diol and a preparation method thereof. The preparation method comprises the following steps: firstly, performing quaterisation reaction on N-methyldiethanolamine and 1,3-propanesultone to prepare zwitterionic diol and then performing esterification reaction on the zwitterionic diol and binary acid to prepare the zwitterionic polyester diol. When the zwitterionic polyester diol is used as a raw material for preparing waterborne polyurethane, a zwitterionic hydrophilic group can be introduced into the block of the polyurethane, so that the water resistance, the stability and other comprehensive performance of the waterborne polyurethane can be improved, and the solid content of the waterborne polyurethane can be increased. The zwitterionic polyester diol is simple in synthetic method, free of toxicity and small in pollution in the producing and using processes, and has a wide application prospect in the waterborne polyurethane industry.

Description

technical field [0001] The invention relates to a polyester diol used for water-based polyurethane and a preparation method thereof, in particular to a polyester diol containing zwitterionic groups and a preparation method thereof. Background technique [0002] Water-based polyurethane refers to the use of water instead of organic solvents as the dispersion medium. The amount of solvent used in the system is less, that is, an environmentally friendly material. It has the advantages of safety, low toxicity, no pollution to the environment, and convenient and simple operation and processing. Water-based polyurethane dispersion is an excellent Green environmental protection materials, whose production and application conform to the sustainable development strategy, are encouraged and supported by governments around the world. Due to its superior application properties, it has played an increasingly important role in coatings, textile finishing, pigment printing, coatings, adhes...

Claims

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Application Information

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IPC IPC(8): C08G63/688C08G63/78C08G18/46
Inventor 刘云晖其他发明人请求不公开姓名
Owner 河北诚信众诚科技有限公司
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