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Waterborne polyurethane dispersion body for water resistance and moisture permeability and preparation method and usage thereof

A water-based polyurethane, waterproof and moisture-permeable technology, applied in polyurea/polyurethane coatings, textiles, papermaking, coatings, etc., can solve the problems of no significant decrease in performance, decline in resin water pressure resistance, and impact on water pressure resistance, etc., to achieve improvement Moisture permeability, easy operation, and simple production process

Active Publication Date: 2018-10-19
WANHUA CHEM GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, experiments have also found that when the ethoxy group (-EO-) hydrophilic group is on the main chain, although the -EO- segment can play a good role in transmitting water molecules, due to its own Hydrophilicity, with the increase of -EO- segment on the main chain, the water pressure resistance of the resin decreases significantly
When the hydrophilic -EO- group is on the side chain, although the water pressure resistance and moisture permeability can be balanced to a certain extent, when the moisture permeability is improved, the water pressure resistance will often be affected
Therefore, in the case of ensuring a certain water pressure resistance, how to improve the moisture permeability and keep the performance of the fabric from washing for many times does not decrease significantly. These requirements have posed new challenges to relevant researchers.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Waterborne polyurethane dispersion body for water resistance and moisture permeability and preparation method and usage thereof
  • Waterborne polyurethane dispersion body for water resistance and moisture permeability and preparation method and usage thereof
  • Waterborne polyurethane dispersion body for water resistance and moisture permeability and preparation method and usage thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0078] Add 40g to a four-necked flask equipped with reflux condenser, thermometer and mechanical stirring HMDI, 25.2g HDI, 70g N120, 35g PPG2000, 50gPTMEG2000, 15gPTMEG1000, 30gMN3050, after reacting at 80°C for 1 hour, the theoretical NCO% reached 6.13%.

[0079] Cool down to 60°C, add 6g BDO, 0.08136g catalyst 8108 and 40g acetone to dilute, stir evenly, heat up to 80°C, react for 4.5-6.5h (75°C start timing), and stop the reaction when it reaches 2.51% of theoretical NCO%. Cool down to 60°C, add 54g of acetone to dilute, stir and mix for 5 minutes to fully mix the prepolymer and acetone, and continue to cool down to 30-35°C.

[0080] Add 1010 / 292 acetone solution, stir for 5 minutes to make the mixture uniform, stir at 1200-1500 rpm, and add 656 g of deionized water within 6 minutes.

[0081] Dilute 2g of ethylenediamine and 10g of 1,3-bis[(trimethylol)methylamino]propane with 48g of deionized water, slowly add them to the system, react at 35℃ for 5min, and distill the emulsion ...

Embodiment 2

[0083] Add 41g to a four-necked flask equipped with reflux condenser, thermometer and mechanical stirring HMDI, 25g HDI, 60g N120, 36g PPG2000, 47gPTMEG2000, 17gPTMEG1000, 30gMN3050, after reacting at 85°C for 1 hour, the theoretical NCO% reached 6.53%.

[0084] Cool down to 60°C, add 7g BDO, 0.0789g catalyst 8108 and 39.6g acetone to dilute, stir evenly, heat to 85°C, react for 4.5-6.5h (75°C start timing), and stop the reaction when it reaches 2.61% of theoretical NCO%. Cool down to 60°C, add 52.6g of acetone to dilute, stir and mix for 5 minutes to fully mix the prepolymer and acetone, and continue to cool down to 30-35°C.

[0085] Add 1010 / 292 acetone solution, stir for 5 minutes to make the mixing uniform, stir at 1200-1500 rpm, add 637 g of deionized water within 6 minutes to obtain an aqueous polyurethane dispersion.

[0086] Dilute 2g of ethylenediamine and 10g of 1,3-bis[(trimethylol)methylamino]propane with 48g of deionized water, slowly add them to the system, react at 3...

Embodiment 3

[0088] Add 38g to a four-necked flask equipped with reflux condenser, thermometer and mechanical stirring HMDI, 24g HDI, 80g N120, 50g PPG2000, 60gPTMEG2000, 15gPTMEG1000, 38gMN3050, after reacting at 75°C for 1 hour, the theoretical NCO% reached 4.41%.

[0089] Cool down to 60°C, add 3.5g BDO, 0.09255g catalyst 8108 and 46g acetone to dilute, stir evenly, heat to 75°C, react for 4.5-6.5h (75°C start timing), and stop the reaction when it reaches 1.89% of theoretical NCO%. Cool down to 60°C, add 61g of acetone to dilute, stir and mix for 5 minutes to fully mix the prepolymer and acetone, and continue to cool down to 30-35°C.

[0090] Add 1010 / 292 acetone solution, stir for 5 minutes to make the mixing uniform, stir at 1200-1500 rpm, and add 730 g of deionized water within 6 minutes to obtain an aqueous polyurethane dispersion.

[0091] Dilute 4g of isophorone diamine and 10g of 1,3-bis[(trimethylol)methylamino]propane with 56g of deionized water, slowly add them to the system, reac...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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PUM

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Abstract

The invention provides a waterborne polyurethane dispersion body for a waterproof and moisture-permeable fabric coating and a preparation method and a usage thereof. The waterborne polyurethane dispersion body is capable of, through a special micromolecular chain extender, introducing strong hydrophilic hydroxyl lateral groups aggregated in clusters to a main chain, and through the strong hydrophilic hydroxyl lateral groups aggregated in clusters and a weak hydrophilic ether bond on a branched chain, a synergistic effect is formed, thereby being beneficial to one-way movement of moisture in fabric from inside to outside. A problem of mutual restriction between hydraulic pressure and moisture permeability is balanced, and the good waterproof and moisture-permeable property are acquired.

Description

Technical field [0001] The invention belongs to the field of waterborne polyurethane materials, and specifically relates to a waterproof and moisture-permeable waterborne polyurethane dispersion, and a preparation method and application thereof. Background technique [0002] With the improvement of people's living standards and the increase in outdoor sports, the requirements for outdoor sportswear are getting higher and higher. Waterproof and moisture-permeable is a major trend. Polyurethane resin is a commonly used waterproof and moisture-permeable resin, but the current waterproof and moisture-permeable polyurethane resin still has the problem of poor moisture permeability. [0003] Studies have found that the amount of sweat perspiration during activities is 11500g / 24h, and the fabric needs about 4000g / m 2 / 24h corresponding moisture permeability; at the same time, in order to achieve the ideal waterproof effect, the hydrostatic pressure of the fabric must not be lower than 5.5...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): C08G18/66C08G18/48C08G18/32C09D175/08D06N3/14
CPCC08G18/3206C08G18/3228C08G18/4825C08G18/4833C08G18/4854C08G18/6674C08G18/6677C08G18/6685C09D175/08D06N3/146
Inventor 刘姗赵炳焱王萃萃张洁邓俊英
Owner WANHUA CHEM GRP CO LTD
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