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Water-borne polyurethane-urea dispersoid containing nonionic and anionic hydrophilic groups

A water-based polyurethane and dispersion technology, applied in the direction of polyurea/polyurethane adhesives, adhesive types, adhesives, etc., can solve the problem of water-based adhesives that cannot meet the water resistance and high bonding strength, water-resistant peeling degree, poor water resistance. issues of sex

Active Publication Date: 2012-04-11
中科华宇(福建)科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] CN1185454A provides a kind of nonionic aqueous polyurethane dispersion and production method, but its polyurethane part is hydrophobic, promptly does not contain ionic or amphoteric part, does not contain the nonionic part based on poly(ethylene oxide)
However, the proportion of oxirane groups in the hydrophilic urethane in this patent is as high as 40-98%, and the water-resistant peeling degree of the adhesive after processing is significantly reduced, which cannot meet the water resistance and high viscosity of the water-based adhesive. Requirements for bonding strength
[0009] CNl214346A provides a kind of water-based polyurethane synthesis process, triggers ethylene oxide polymerization with amine, and prepares polyurethane prepolymer dispersion with aromatic polyisocyanate, and finally disperses this polyurethane prepolymer dispersion into water and hydrophobic polyol Or the mixed dispersion of hydrophobic polyamine-based compound is strongly stirred to make polyurethane aqueous dispersion. Due to the limitation of the molar ratio of isocyanate-terminated polyurethane prepolymer and hydrophobic polyhydroxyl or polyamine, the polycyclic ring in the polyurethane main chain The content of oxyethane will be relatively high, which will easily lead to poor water resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] The examples are further specific descriptions of the present invention, and the present invention is not limited to the following examples. Example 1. with 150g PBA (1,4-butylene adipate), the Polyethylene Glycol of 4g number average molecular weight 2000 adds airway tube, in the there-necked flask of stirrer and thermometer, heating and melting, in Vacuum dehydration at 110-120°C, 5mmHg for 1 hour, after cooling to about 70°C, add 0.68g of DMPA (dimethylol propionic acid), stir until the material is homogeneous, add 1.44g of HDI (hexamethylene diisocyanate) React with 17.08g of IPDI (isophorone diisocyanate), about 0.1g of DBTDL (dibutyltin dilaurate), and heat at 80-90°C for 4 hours to obtain a translucent viscous liquid. After cooling slightly, replace the gas guide device with reflux device, add about 350ml of acetone, and after the material is uniform in one phase, add a mixture of 4.94g of AAS (sodium ethylenediaminoethanesulfonate) (50%), 9.42g of water, 0.24g o...

example 2

[0027] Example 2. Add 150g of PBA and 4g of polyethylene glycol with a number average molecular weight of 2000 into a three-necked flask equipped with an air guide tube, a stirrer and a thermometer, heat and melt, vacuum dehydrate at 110-120°C and 5mmHg for 1 hour, and cool to After about 70°C, add 0.68g DMPA, stir until the material is homogeneous, add 1.21g HDI and 14.37gIPDI, about 0.1g DBTDL, keep warm at 80-90°C for 4 hours, and get a translucent viscous liquid. Replace the air device with a reflux device, add about 340ml of acetone, and wait for the material to become a uniform phase, such as adding a mixed solution of 2.66gAAS (50%), 6.78g water, 0.32g ethylenediamine, and 0.52g triethylamine. Incubate at -50°C for 20 minutes, add about 250 ml of water under vigorous stirring, and remove acetone by vacuum distillation to obtain a white emulsion. Gels quickly.

example 3

[0028] Example 3. Add 150g of PBA and 2g of polyethylene glycol with a number average molecular weight of 2000 into a three-neck flask equipped with an air guide tube, a stirrer and a thermometer, heat and melt, vacuum dehydrate at 110-120°C and 5mmHg for 1 hour, and cool to After about 70°C, add 0.68g DMPA, stir until the material is homogeneous, add 1.34g HDI and 15.96gIPDI, about 0.1g DBTDL, keep warm at 80-90°C for 4 hours, and get a translucent viscous liquid. Replace the air device with a reflux device, add about 400ml of acetone, and after the material is uniform, add a mixed solution of 3.10g of AAS (50%), about 4g of water and 0.66g of ethylenediamine, and keep it warm at 40-50°C for 20 minutes , add about 250ml of water under vigorous stirring, and vacuum distill off acetone to obtain a white emulsion. Its solid content is 43%, the initial peel strength is <30N / 25mm, and delamination occurs after being placed for 4 months.

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Abstract

The invention provides a water-borne polyurethane-urea dispersoid containing nonionic and anionic hydrophilic groups. The dispersoid is characterized in that: a resin main chain contains a nonionic hydrophilic component, and a side group contains an anionic hydrophilic group. The invention also provides a preparation method of the dispersoid. The water-borne polyurethane-urea dispersoid containing the nonionic-anionic hydrophilic groups can be applied to the fields of shoemaking adhesive, vacuum plastic and the like.

Description

technical field [0001] The invention relates to a water-based polyurethane-urea dispersion, the resin main chain contains non-ionic hydrophilic components, and the side groups contain anionic hydrophilic groups. A process for the preparation of the dispersion is provided. It can be used in shoe-making adhesives, vacuum-absorbing plastics and other fields. Background technique [0002] Water-based polyurethane has the advantages of good elasticity, good flexibility, and good hand feeling, and is non-flammable, non-toxic, environmentally friendly, and meets the requirements of environmental protection products. As people pay more and more attention to the environment and health, the development of water-based polyurethane dispersions , production and application have developed rapidly. [0003] Waterborne polyurethane dispersions are formed by dispersing polyurethane-urea in water. There are two types of known methods for obtaining aqueous polyurethane dispersions: external...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/42C08G18/48C08G18/32C09J175/06C09J175/08C08L75/06C08L75/08
Inventor 龚翠然许莹高冬寿
Owner 中科华宇(福建)科技发展有限公司
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