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Synthesis method of hydrolysis-resistant and high-color-fastness waterborne polyurethane emulsion

A water-based polyurethane, high color fastness technology, applied in the chemical field, can solve the problems of single color, water-based polyurethane material water resistance, wear resistance and other properties are not improved, etc., to achieve strong leather feeling, easy storage and transportation, improve stability Effect

Active Publication Date: 2022-03-25
江苏华缘高科股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

But its color is single, there is no colored water-based polyurethane dye, and it does not improve the water resistance and wear resistance of water-based polyurethane materials.

Method used

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  • Synthesis method of hydrolysis-resistant and high-color-fastness waterborne polyurethane emulsion

Examples

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Effect test

Embodiment approach 1

[0020] A method for synthesizing water-based polyurethane with hydrolysis resistance and high color fastness. Raw materials are taken by weight percentage: 20% diisocyanate, 15% oligomeric glycol, 5% vinyl-modified Maya blue-like hybrid pigment, acrylic acid -2-hydroxyethyl ester crosslinking agent 3%, ethanolamine hydrophilic chain extender 5%, glycerin crosslinking agent 0%-1%, small molecule acid neutralizer 2%, small molecule diamine extender 5% chain agent, 0.5% organic bismuth catalyst, 10% acetone, and the balance is water;

[0021] The synthesis steps are as follows:

[0022] (1) Preparation of vinyl-modified attapulgite-like hybrid pigments:

[0023] Take 2.0 g of indigo and 20.0 g of attapulgite and mix them in a ratio of 1:10, mix well and put them in an oven for 48 h at 130°C, take them out and cool to room temperature, disperse them in 200 ml of water, add 100 ml of isopropanol, 0.5 g sodium silicate, 3 g vinyltriethoxysilane and 0.5 ml hydrochloric acid (12 mol...

Embodiment approach 2

[0031] A method for synthesizing water-based polyurethane with hydrolysis resistance and high color fastness. The raw materials are taken by weight percentage: 25% of diisocyanate, 15% of oligomeric glycol, and 3% of vinyl-modified Mayan blue attapulgite hybrid pigment , 2-hydroxyethyl acrylate crosslinking agent 5%, ethanolamine hydrophilic chain extender 10%, glycerin crosslinking agent 0.5%, small molecule acid neutralizer 6%, small molecule diamine chain extender 8% agent, 1% organic bismuth catalyst, 10% acetone, and the balance is water;

[0032] The synthesis steps are as follows:

[0033] (1) Preparation of vinyl-modified attapulgite-like hybrid pigments:

[0034] Take 2.0 g of methyl red and 20.0 g of attapulgite and mix them according to the ratio of 1:10. After mixing well, put them in an oven for 48 hours at 130 ℃, take them out and cool to room temperature, disperse them in 200 ml of water, add 100 ml of isopropyl Alcohol, 0.5 g sodium silicate, 3 g vinyltrietho...

Embodiment approach 3

[0042] A method for synthesizing water-based polyurethane with hydrolysis resistance and high color fastness. The raw materials are taken by weight percentage: 30% diisocyanate, 20% oligomeric glycol, 1% vinyl-modified Maya blue-like hybrid pigment, acrylic acid -2-hydroxyethyl ester crosslinking agent 5%, ethanolamine hydrophilic chain extender 3%-15%, glycerol crosslinking agent 0%-1%, small molecule acid neutralizer 2%-10%, Small molecule diamine chain extender 3%-15%, organic bismuth catalyst 0%-1%, acetone 10%-20%, the balance is water;

[0043] The synthesis steps are as follows:

[0044] (1) Preparation of vinyl-modified attapulgite-like hybrid pigments:

[0045] Take 2.0 g of madder pigment and 20.0 g of attapulgite and mix them in a ratio of 1:10. After mixing well, put them in an oven and dry them at 130°C for 48 hours. Take them out and cool to room temperature, disperse them in 200 ml of water, and add 100 ml of isopropanol , 0.5 g sodium silicate, 3 g vinyltriet...

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Abstract

The invention relates to the field of chemical engineering, and discloses a synthesis method of a hydrolysis-resistant and high-color-fastness waterborne polyurethane emulsion. The preparation method comprises the following steps: carrying out stepwise polymerization reaction on oligomeric dihydric alcohol, aliphatic diisocyanate, a vinyl modified Maya blue-like attapulgite hybrid pigment, an ethanolamine hydrophilic chain extender, an acrylic acid-2-hydroxyethyl ester cross-linking agent and a glycerol cross-linking agent to synthesize a polyurethane prepolymer modified by the Maya blue-like attapulgite hybrid pigment on a side chain; the preparation method comprises the following steps: preparing an ethanol amine functional group, adding an acid neutralizer to neutralize the ethanol amine functional group to form quaternary ammonium salt, self-emulsifying and dispersing the quaternary ammonium salt in metering water to obtain a Maya blue-like attapulgite hybrid pigment modified waterborne polyurethane dispersion liquid, and adding diamine for chain extension to prepare the hydrolysis-resistant high-color-fastness waterborne polyurethane emulsion. When the waterborne polyurethane emulsion is used for producing waterborne polyurethane coatings, synthetic leather and other products in the later period, the water resistance of the obtained waterborne polyurethane product can be effectively improved, and the mechanical performance, color fastness and the like of the obtained product are further improved.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a method for synthesizing a water-based polyurethane emulsion with hydrolysis resistance and high color fastness. Background technique [0002] Polyurethane materials are widely used in light industry, chemical industry, electronics, medical treatment, building materials, automobiles, national defense, aerospace, aviation and many other fields of national economy because of their excellent mechanical and cold resistance properties. However, a large amount of organic solvents are required in the preparation process of traditional solvent-based polyurethane materials, which not only causes serious environmental problems, but also limits its application in high-end fields such as automobiles and medical treatment. [0003] Water-based polyurethane uses water as the dispersion medium, and the dispersion liquid does not contain or contain a very small amount of organic solve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G18/67C08G18/66C08G18/42C08G18/32C08G18/08C08K9/06C08K3/34C08K5/3417C08K9/10C08K3/36
CPCC08G18/672C08G18/4238C08G18/3206C08G18/3275C08G18/3228C08G18/08C08K9/06C08K3/346C08K5/3417C08K9/10C08K3/36C08G18/6655
Inventor 倪伶俐李浩扬赵兵兵李桂军张峰冯会生甄雷雷
Owner 江苏华缘高科股份有限公司
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