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Aqueous dispersion of polyurethane or polyurethane urea as well as preparation method and application of aqueous dispersion

A technology of polyurethane urea and dispersion, which is applied in the direction of textiles and papermaking, and can solve problems such as the decline in water resistance of the coating and the inability to meet the use requirements

Active Publication Date: 2020-04-17
WANHUA CHEM GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, polyethylene glycol has strong hydrophilicity, which will cause the water resistance of the coating to decrease and cannot meet the requirements of use.

Method used

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  • Aqueous dispersion of polyurethane or polyurethane urea as well as preparation method and application of aqueous dispersion
  • Aqueous dispersion of polyurethane or polyurethane urea as well as preparation method and application of aqueous dispersion
  • Aqueous dispersion of polyurethane or polyurethane urea as well as preparation method and application of aqueous dispersion

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0132] 1) Add 210g of dehydrated PNA2000, 84g of CMB54, 5.88g of MPEG-1200, 10g of 12-hydroxystearic acid, 0.1g of bismuth neodecanoate, 47.6g of hexamethylene diisocyanate and 35.7g of acetone into a In a 1L four-necked round-bottomed flask with nitrogen inlet and outlet, the reaction was carried out with stirring at 70-80°C until the NCO content in the reaction system reached 2.50wt%, and the reaction was terminated to obtain the isocyanate-terminated prepolymer I;

[0133] 2) Add 528g of acetone to the system for dilution, lower the temperature and keep the temperature of the system at 43-50°C, add 4.9g of A95, 13.5g of isophoronediamine and 1.4g of AMP-95 for chain extension reaction for 15min to obtain terminal Isocyanate prepolymer II; then add 625g of water under high-speed stirring to disperse the obtained reaction product, and add 0.8g of ethylenediamine after the dispersion and continue stirring for 5min. After separation of acetone by distillation, an aqueous disper...

Embodiment 2

[0135] 1) 210g of dehydrated PNA2000, 84g of CMB54, 5.88g of MPEG-1200, 1.9g of 2-hydroxystearic acid, 0.1g of bismuth neodecanoate, 47.6g of hexamethylene diisocyanate and 137.4g of acetone were added to In a 1L four-neck round-bottomed flask equipped with a nitrogen inlet and outlet, the reaction was carried out with stirring at 70-80°C until the NCO content in the reaction system reached 2.33wt%, and the reaction was terminated to obtain the isocyanate-terminated prepolymer I;

[0136] 2) Add 1122g of acetone to the system for dilution, lower the temperature and keep the system temperature at 43-50°C, add 19g of A95 and 11.5g of AMP-95 for chain extension reaction for 15min to obtain isocyanate-terminated prepolymer II; then The resulting reaction product was dispersed by adding 625 g of water with stirring. After separation of acetone by distillation, the aqueous dispersion of solvent-free polyurethane or polyurethane urea is obtained, its theoretical design molecular weig...

Embodiment 3

[0138] 1) 210g of dehydrated PNA2000, 84g of CMB54, 20g of MPEG-1200, 20g of 12-hydroxystearic acid, 0.1g of bismuth neodecanoate, 47.6g of hexamethylene diisocyanate and 7.6g of acetone were added to the In a 1L four-neck round-bottomed flask at the import and export, the reaction was carried out with stirring at 70-80°C until the NCO content in the reaction system reached 2.04wt%, and the reaction was terminated to obtain the isocyanate-terminated prepolymer I;

[0139] 2) Add 236.4g of acetone to the system for dilution, lower the temperature and keep the system temperature at 43-50°C, add 2g of A95, 10g of isophoronediamine and 0.4g of AMP-95 for chain extension reaction for 15min to obtain terminal isocyanate the prepolymer II; the resulting reaction product was then dispersed by adding 625 g of water under high-speed stirring. After acetone is separated by distillation, the aqueous dispersion of solvent-free polyurethane or polyurethane urea is obtained, its theoretical ...

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Abstract

The invention relates to the technical field of aqueous polyurethane dispersions, in particular to an aqueous dispersion of polyurethane or polyurethane urea as well as a preparation method and an application thereof. The polyurethane or polyurethane urea is a reaction product prepared from raw materials comprising the following components: a) a polyol having Mn being greater than or equal to 1000and a functionality of 2-4; b) isocyanate having at least two isocyanate groups, optionally, c) a monofunctional nonionic hydrophilic compound containing at least one NCO reactive functional group, d) a hydrophilic compound containing one or more of an ionic group, a latent ionic group and a nonionic group and containing 2-3 NCO reactive functional groups, e) a hydroxyl fatty acid with a long carbon chain, f) a small molecular end-capping agent containing a single amino group, and optionally g) a low molecular compound containing 2 or more NCO reactive amino groups. The aqueous dispersion disclosed by the invention not only can ensure the softness of the resin, but also can improve the adhesive force of the aqueous slurry on the nylon fabric.

Description

technical field [0001] The invention relates to the technical field of polyurethane aqueous dispersions, in particular to an aqueous dispersion of polyurethane or polyurethane urea and its preparation method and application. Background technique [0002] Due to the characteristics of water-based glue, which does not contain organic solvents, is harmless to the human body, and is environmentally friendly, it is gradually used as glue in various fields such as textiles, wood, metal, and construction. Among them, due to the particularity of the substrate of the textile coating, the water-based coating used on it is required to have the characteristics of high adhesion, high softness, washing resistance, dryness and yellowing resistance. [0003] In textile materials, due to the low surface energy of nylon fabrics, it is difficult for water-based coatings to meet the requirements of high adhesion and high softness. [0004] In addition, the water-based coating fastness for nylo...

Claims

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Application Information

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IPC IPC(8): C08G18/66C08G18/42C08G18/48C08G18/34C08G18/32C08G18/12D06N3/14D06N3/00
CPCC08G18/6625C08G18/4018C08G18/42C08G18/48C08G18/348C08G18/3234C08G18/3271C08G18/3228C08G18/12D06N3/146D06N3/148D06N3/0034D06N2209/1642D06N2209/1664
Inventor 邢庆达纪学顺王震晋云全朱文辉刘云玲尹逊迪王少鹏于丽
Owner WANHUA CHEM GRP CO LTD
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