Waterborne polyurethane emulsion as well as preparation method and application thereof

A water-based polyurethane and polyurethane film technology, applied in polyurea/polyurethane coatings, coatings, etc., can solve problems such as poor mechanical properties, poor water resistance, and inability to meet environmental protection requirements, so as to improve dispersion and stability, reduce The effect of consumption

Pending Publication Date: 2020-01-24
KUNSHAN JIALIPU PLATE MAKING TACKIFIER & INK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, organic solvents, catalysts, etc. are used in the preparation process of the waterborne polyurethane, which is not conducive to the needs of environmental protection.
[0005] CN105801790A discloses a water-based polyurethane and a preparation method thereof, and also discloses a water-based polyurethane automotive interior adhesive and a preparation method thereof, which sol

Method used

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  • Waterborne polyurethane emulsion as well as preparation method and application thereof
  • Waterborne polyurethane emulsion as well as preparation method and application thereof
  • Waterborne polyurethane emulsion as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0101] This embodiment provides a water-based polyurethane emulsion, the raw materials of which are composed of bio-based emulsifier, isophorone diisocyanate, 1,4-butanediol, triethylamine, acetone, ethylenediamine and deionized water.

[0102] The preparation method is as follows:

[0103] (1) Preparation of bio-based emulsifier:

[0104] 40.00g of castor oil and 6.00g of maleic anhydride were added into the reactor and mixed respectively, the temperature was adjusted to 120°C, the stirring speed was 800rpm for 5h, and then cooled to 25°C to obtain the bio-based emulsifier.

[0105] The hydroxyl value of the bio-based emulsifier prepared above is 80 mgKOH / g, and the acid value is 52 mgKOH / g.

[0106] (2) Preparation of water-based polyurethane emulsion:

[0107] a) Bio-based emulsifier (MCO) 3.8155g (the molar number of hydroxyl group is 0.00544mol, the molar number of carboxyl group is 0.0036mol), 2.2228g of isophorone diisocyanate (the molar number of isocyanate is 0.02mo...

Embodiment 2

[0112] This embodiment provides a water-based polyurethane emulsion, the preparation raw materials of which are composed of bio-based emulsifier, toluene diisocyanate, 1,4-butanediol, triethylamine, acetone, ethylenediamine and deionized water.

[0113] The preparation method is as follows:

[0114] (1) Preparation of bio-based emulsifier:

[0115] 40.0 g of castor oil and 7.01 g of maleic anhydride were added into the reactor for mixing, and the temperature was adjusted to 110° C., and stirred at 900 rpm for 6 hours, and then cooled to 23° C. to obtain the bio-based emulsifier.

[0116] The hydroxyl value of the bio-based emulsifier prepared above is 67 mgKOH / g, and the acid value is 60 mgKOH / g.

[0117] (2) Preparation of water-based polyurethane emulsion:

[0118] a) 4.1881g of bio-based emulsifier (MCO) (the molar number of hydroxyl group is 0.0050mol, the molar number of carboxyl group is 0.004479mol), 1.7415g of toluene diisocyanate (the molar number of isocyanate is 0...

Embodiment 3

[0123] This embodiment provides a water-based polyurethane emulsion, the raw materials of which are composed of bio-based emulsifier, diphenylmethane diisocyanate, glycerin, triethylamine, acetone, ethylenediamine and deionized water.

[0124] The preparation method is as follows:

[0125] (1) Preparation of bio-based emulsifier:

[0126] 40.0g of modified soybean oil (hydroxyl value 192mg KOH / g) and 6.9938g of maleic anhydride were added to the reactor and mixed respectively, the temperature was adjusted to 100°C, and the stirring speed was reacted at 900rpm for 5h, and then cooled to 18°C ​​to obtain The bio-based emulsifier.

[0127] The hydroxyl value of the bio-based emulsifier prepared above is 93 mg KOH / g, and the acid value is 56 mg KOH / g.

[0128] (2) Preparation of water-based polyurethane emulsion:

[0129] a) 4.6636g of bio-based emulsifier (the molar number of hydroxyl group is 0.007731mol, the molar number of carboxyl group is 0.004655mol), 2.5024g of diphenyl...

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Abstract

The invention provides a waterborne polyurethane emulsion as well as a preparation method and application thereof. The waterborne polyurethane emulsion is prepared from the following raw materials: abio-based emulsifier, diisocyanate, a first chain extender, a second chain extender, a salt-forming agent, a viscosity reducer and deionized water. The bio-based emulsifier is used as a preparation raw material for the first time, and the bio-based emulsifier not only contains hydroxyl capable of reacting with isocyanate radicals, but also contains carboxyl capable of generating salt forming reaction, therefore, requirements of a traditional waterborne polyurethane emulsion preparation process on catalysts and organic solvents are avoided, and consumption of hydrophilic chain extenders can bereduced, besides, the bio-based emulsifier is used as a soft segment in polyurethane molecular chains, and the molecular structure of the bio-based emulsifier contains carboxyl, so that the particle size of the waterborne polyurethane emulsion is reduced, and the dispersity and stability of particles are improved. The preparation method is simple and easy to operate, no solvent or catalyst is usedin the whole preparation process, and the preparation method is more environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of water-based polyurethane preparation, in particular to a water-based polyurethane emulsion and a preparation method and application thereof. Background technique [0002] Water-based polyurethane is a new type of polyurethane system that uses water instead of organic solvents as the dispersion medium, also known as water-dispersed polyurethane, water-based polyurethane or water-based polyurethane. Water-based polyurethane uses water as a solvent, and has the advantages of no pollution, safety and reliability, excellent mechanical properties, good compatibility, and easy modification. [0003] As a multifunctional polymer, waterborne polyurethane (WPU) has been used in many fields, such as ink, leather, foam, coating, adhesive, etc. However, a large amount of organic solvents will be used in the preparation process of WPU, which will cause certain harm to the environment and human health. At the same tim...

Claims

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Application Information

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IPC IPC(8): C08G18/36C08G18/10C08G18/08C08G18/24C08G18/32C09D175/04
CPCC08G18/10C08G18/36C08G18/0823C08G18/244C09D175/04
Inventor 蒋平平代注顶张萍波夏琪郑付林俞晓琴
Owner KUNSHAN JIALIPU PLATE MAKING TACKIFIER & INK
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