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A kind of polyurethane-polyurea aqueous dispersion and its preparation method and application

A polyurethane and dispersion technology, applied in textiles and papermaking, etc., can solve the problems of workability and improvement of solid content, achieve good printing layout effect, improve construction performance, and high solid content

Active Publication Date: 2021-07-23
WANHUA CHEM GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the relevant reports based on the textile field pay more attention to the hydrolytic stability, cohesiveness, resilience, etc. of the resin, and there is no report on improving its workability and solid content.

Method used

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  • A kind of polyurethane-polyurea aqueous dispersion and its preparation method and application
  • A kind of polyurethane-polyurea aqueous dispersion and its preparation method and application
  • A kind of polyurethane-polyurea aqueous dispersion and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] 147g of dehydration-treated polyol V (33.0wt%) and 220g of dehydration-treated polyol I (49.4wt%), 30g of HDI (6.7wt%), 30g of IPDI (6.7wt%), 3.0g of dehydration-treated MPEG -1200 (0.7wt%) and 50g of acetone were added to a 1L four-necked round-bottomed flask equipped with a nitrogen inlet and outlet, and the mixture was stirred at 60-90°C until the NCO reached 2.5%, and 550g of acetone was added to dilute the temperature and cooled to 40-90°C. 50°C, under rapid stirring, add 5 g concentration of 50% aqueous sodium N-(2-aminoethyl)-2-aminoethanesulfonate solution (N-(2-aminoethyl)-2- Sodium aminoethanesulfonate (0.6wt%) and 13g isophoronediamine (3.0wt%) were reacted for about 15min, and 400g deionized water was added under rapid stirring to disperse. After the acetone was separated by distillation, a solvent-free polyurethane-polyurea dispersion was obtained, and 2.7 g of triisopropanolamine (0.6 wt %) was added and stirred evenly. Finally, an aqueous polyurethane-po...

Embodiment 2

[0074] 170g of dehydrated polyol VI (41.2wt%) and 180g of dehydrated polyol II (43.6wt%), 47g of HDI (11.4wt%), 4.7g of IPDI (1.1wt%), 4.0g of dehydrated To process MPEG-1200 (1.0wt%), add 50g of acetone into a 1L four-necked round-bottomed flask equipped with a nitrogen inlet and outlet, stir the mixture at 60-90°C until the NCO reaches 2.55%, add 500g of acetone to dilute and cool down to 40~50℃, under rapid stirring, add 4 g of 50% aqueous solution of N-(2-aminoethyl)-2-aminoethanesulfonate sodium solution (N-(2-aminoethyl)- Sodium 2-aminoethanesulfonate (0.5wt%) and 4.5g ethylenediamine (1.1wt%) were reacted for about 15min, and 379g deionized water was added under rapid stirring to disperse. After acetone was separated by distillation, a solvent-free polyurethane-polyurea dispersion was obtained, and 4.0 g of triisopropanolamine (1.0 wt %) was added and stirred evenly. Finally, an aqueous polyurethane-polyurea dispersion was obtained with a solids content of 55% by weigh...

Embodiment 3

[0076]300g of dehydration treated polyol I (83.0wt%), 40g HDI (11.2wt%), 8gIPDI (2.2wt%), 4.0g of dehydration treatment MPEG-1200 (1.1wt%), 45g acetone were added to the In a 1L four-necked round bottom flask with nitrogen inlet and outlet, stir the mixture at 60-90°C until the NCO reaches 2.9%, then add 600g of acetone to dilute and cool down to 40-50°C, add 6.0g diluted with 5 times water under rapid stirring Concentration is 50% N-(2-aminoethyl)-2-aminoethanesulfonate sodium aqueous solution (N-(2-aminoethyl)-2-aminoethanesulfonate sodium 0.8wt%) and 4.5g Ethylenediamine (1.3wt%) was reacted for about 15 minutes, and 350 g of deionized water was added under rapid stirring to disperse. After acetone was separated by distillation, a solvent-free polyurethane-polyurea dispersion was obtained, and 3.7 g of triisopropanolamine (1.0 wt %) was added and stirred evenly. Finally, an aqueous polyurethane-polyurea dispersion was obtained with a solids content of 55% by weight and an ...

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Abstract

The invention discloses a polyurethane-polyurea aqueous dispersion and its preparation method and application, wherein the polyurethane-polyurea aqueous dispersion contains one or more tertiary amine compounds, and one or more functionalities are 2-2 4 polyols, one or more polyisocyanates, etc. The polyurethane-polyurea aqueous dispersion provided by the present invention has excellent powder dispersibility and film-forming properties, and the printing paste based on it has excellent thixotropy, construction performance and printing smoothness, and is suitable for textile, printing or printing. Synthetic leather field.

Description

technical field [0001] The invention belongs to the field of polymer materials, and relates to a polyurethane-polyurea aqueous dispersion and a preparation method and application thereof. Background technique [0002] Because polyurethane-polyurea aqueous dispersion has excellent paintability, excellent flexibility, peel strength and outstanding resistance, it has been widely used in the fields of coatings and adhesives. When used in the field of textile printing, it needs to have good film-forming properties, adhesion and flexibility, especially when used in the field of shoe material printing, in order to improve the thickness during printing, it is necessary to add gas phase dioxide with a large specific surface area Silicon such as Degussa's 200, which puts forward higher requirements for the dispersion, not only requires the dispersion itself to have high solid content and low viscosity, but also often requires good dissolution and coating of fumed silica, and good co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/42C08G18/48C08G18/32D06N3/14D06N3/00
CPCC08G18/3855C08G18/4018C08G18/425C08G18/4277C08G18/4833C08G18/6618D06N3/0061D06N3/0063D06N3/146D06N3/148D06N2211/28
Inventor 纪学顺王震李海峰仇伟朱文辉
Owner WANHUA CHEM GRP CO LTD
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