Method for preparing water-based polyurethane resin and water-based polyurethane resin

A water-based polyurethane and resin technology, applied in the field of polyurethane resin, can solve the problems of poor hydrolysis resistance, poor flame retardancy, and poor performance of water-based ecological synthetic leather, and achieve the effect of enhancing compatibility and compatibility

Inactive Publication Date: 2011-01-05
丽水市优耐克水性树脂科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, due to the good hydrophilic properties of water-based polyurethane resin, the water-based ecological synthetic leather produced has poor hydrolysis resistance, poor resistance to alcohol, toluene, urine and other chemical substances, that is, poor anti-fouling and dirt resistance
On the other hand, polyurethane resin is composed of C, N, O, H and other chemical elements, among which C, N, H and other elements are easy to burn and react with O in the air to form carbon dioxide, nitrogen dioxide and water. That is, poor flame retardancy

Method used

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  • Method for preparing water-based polyurethane resin and water-based polyurethane resin
  • Method for preparing water-based polyurethane resin and water-based polyurethane resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] This embodiment is used to illustrate the preparation method of the waterborne polyurethane resin provided by the invention.

[0030] (1) Preparation of fluorine-containing diols

[0031] 20g of diethanolamine and 63.35g of dodecafluoroheptyl methacrylate were heated and refluxed at 80°C for 6 hours under the protection of nitrogen, and samples were taken every 30 minutes to measure their UV-vis spectra until the absorption peak remained basically unchanged. Wash 6 times with ethanol, 10ml each time, distill out acetocyanide and unreacted raw materials under reduced pressure to obtain 50.56g of product (yield rate: 63.2%).

[0032] (2) Preparation of prepolymer

[0033] Add 100.04g of isophorone diisocyanate to 100g of polytetrahydrofuran ether glycol (Mn=2000) and 50.5g (Mn=505.2) of the fluorine-containing diol mixed system prepared in step (1), at 80°C React for 120 minutes.

[0034] (3) Chain extension reaction

[0035]After step (2) finished, the reaction syste...

Embodiment 2

[0041] This embodiment is used to illustrate the preparation method of the waterborne polyurethane resin provided by the invention.

[0042] (1) Preparation of fluorine-containing diols

[0043] 12.28g of diethanolamine and 38.88g of dodecafluoroheptyl methacrylate were heated and refluxed at 80°C for 6 hours under the protection of nitrogen, and samples were taken every 30 minutes to measure their UV-vis spectra until the absorption peak remained basically unchanged. Wash with ethanol 6 times, 10ml each time, and distill out acetocyanide and unreacted raw materials under reduced pressure to obtain 30.9g (60.4% yield) of the product.

[0044] (2) Preparation of prepolymer

[0045] Add 73.36g of isophorone diisocyanate to 100g of polytetrahydrofuran ether glycol (Mn=2000) and 30.3g (Mn=505.2) of the fluorine-containing diol mixed system prepared in step (1), at 80°C React for 120 minutes.

[0046] (3) Chain extension reaction

[0047] After step (2) finished, the reaction s...

Embodiment 3

[0053] This embodiment is used to illustrate the preparation method of the waterborne polyurethane resin provided by the invention.

[0054] (1) Preparation of fluorine-containing diols

[0055] 7.94g of diethanolamine and 25.12g of dodecafluoroheptyl methacrylate were heated and refluxed at 75°C for 6 hours under nitrogen protection, and samples were taken every 30 minutes to measure their UV-vis spectra until the absorption peak remained basically unchanged. Wash with ethanol 6 times, 10ml each time, and distill out acetocyanide and unreacted raw materials under reduced pressure to obtain 21.07g of the product (63.76% yield).

[0056] (2) Preparation of prepolymer

[0057] Add 73.36g of isophorone diisocyanate into 160g of polytetrahydrofuran ether glycol (Mn=2000) and 20.2g (Mn=505.2) of the fluorine-containing diol mixed system prepared in step (1), and react at 80°C 120 minutes.

[0058] (3) Chain extension reaction

[0059] After step (2) finished, the reaction syste...

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Abstract

The invention provides a method for preparing a water-based polyurethane resin. The method comprises the following steps of: (1) reacting polyisocyanate, polyether diol and fluorine-containing diol to obtain prepolymer; (2) performing chain extension reaction on the prepolymer, bromine-containing diol and hydrophilic chain extender; and (3) neutralizing the solution by using a salt forming agent, and dispersing and emulsifying the solution by adding water to obtain water-based polyurethane dispersion. The invention also provides the water-based polyurethane resin prepared by the method. The water-based polyurethane resin solves the problems of poor dirt resistance and flame-retardant property of oil-based polyurethane resin and common water-based polyurethane resin.

Description

technical field [0001] The present invention relates to a preparation method of water-based polyurethane resin and the water-based polyurethane resin prepared by the method, more particularly to a preparation method of the anti-fouling and flame-retardant water-based polyurethane resin for synthetic leather and the polyurethane resin prepared by the method . Background technique [0002] Polyurethane (PU) refers to the abbreviation of high polymer polyurethane (Polyurethane) containing a large number of carbamate groups (-NHCOO-) on the main chain. Because of its excellent physical and chemical properties, it has been widely used in the synthetic leather and artificial leather industries. It is a multifunctional polymer material. It has become an indispensable class of polymer materials in social and economic development. [0003] Polyurethane resins for synthetic leather are divided into oily polyurethane resins and water-based polyurethane resins. Oily polyurethane resi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L75/08C08G18/12C08G18/32C08G18/48C08J3/03C08J5/18D06M15/576D06N3/14
Inventor 卢子标谢镇铭
Owner 丽水市优耐克水性树脂科技有限公司
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