Check patentability & draft patents in minutes with Patsnap Eureka AI!

A kind of preparation method and application of soft high-solid aqueous polyurethane resin

A polyurethane resin and water-containing technology, which is applied in the direction of improved hand-feeling fibers, etc., can solve the problems of increasing the cost and high price of high-solid water-containing polyurethane resin, and achieve the effects of high cost performance, soft film formation and high solid content

Active Publication Date: 2018-05-15
SHANGHAI LANOU CHEM IND TECH
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because sodium ethylenediamine sulfonate contains two highly active amine-based hydrophilic chain extenders, and reacts quickly with isocyanates, it generally needs to be added to the reaction at a lower temperature, and it needs to be added in the later stage of the reaction, so Generally, only isocyanate monomers with relatively low activity (such as IPDI and HDI) can be used, and these two monomers are often expensive, which greatly increases the cost of high-solid water-based polyurethane resins

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
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A kind of preparation method and application of soft high-solid aqueous polyurethane resin
  • A kind of preparation method and application of soft high-solid aqueous polyurethane resin
  • A kind of preparation method and application of soft high-solid aqueous polyurethane resin

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Embodiment 1 A kind of preparation method of soft high-solid aqueous polyurethane resin

[0049] The preparation method of high-solid aqueous polyurethane resin, the steps are as follows:

[0050] 200g of polyfumaric acid-adipate-diethylene glycol ester polyol containing at least one sodium sulfonate group and a molecular weight of 2000 in the main chain and 1400g of polyadipate-1,4-polyol with a molecular weight of 2000 The butanediol ester diol is put into the reaction kettle, heated and melted by heating and stirred evenly. Dehydration under reduced pressure at 120° C. and a vacuum degree of 0.1 MPa for 1 hour. After the dehydration is completed, lower the temperature to 60°C, add 200g of acetone, stir evenly, add 260g of toluene diisocyanate (TDI), raise the temperature to 80°C and react for 2 hours to obtain a polyurethane prepolymer.

[0051] Subsequently, 40 g of ethylene glycol was added to continue the reaction for 2 hours. If the measured NCO% was less than ...

Embodiment 2

[0053] Embodiment 2 A kind of preparation method of soft high-solid aqueous polyurethane resin

[0054] The preparation method of high-solid aqueous polyurethane resin, the steps are as follows:

[0055] 220g of polyfumaric acid-adipate-diethylene glycol ester polyol with a molecular weight of 2000 and 1400g of polyadipate-neopentyl glycol ester glycol with a molecular weight of 2000 are put into the reactor, heated and melted and stir well. Dehydration under reduced pressure at 120° C. and a vacuum degree of 0.1 MPa for 1 hour. After the dehydration is completed, lower the temperature to 60°C, add 200g of acetone, stir evenly, add 278g of toluene diisocyanate (TDI), raise the temperature to 80°C and react for 2 hours to obtain a polyurethane prepolymer.

[0056] Subsequently, 60 g of 1,6-hexanediol was added to continue the reaction for 2 hours. If the measured NCO% was less than or equal to 1.2%, the reaction was terminated. Add 2000g of acetone dropwise to the reactant t...

Embodiment 3

[0058] Embodiment 3 A kind of preparation method of high solid aqueous polyurethane resin

[0059] The preparation method of high-solid aqueous polyurethane resin, the steps are as follows:

[0060] The 300g main chain contains at least one sodium sulfonate group, the polyfumaric acid-adipic acid-ethylene glycol-diethylene glycol polyol of 3000 molecular weight and the polytetrahydrofuran ether glycol of 2000 with a molecular weight of 1500g are dropped into In the reaction kettle, heat up to melt and stir evenly. Dehydration was carried out under reduced pressure at 120° C. and a vacuum degree of 0.1 MPa for 1 hour. After the dehydration is completed, lower the temperature to 60°C, add 200g of acetone, stir evenly, add 280.5g of toluene diisocyanate (TDI), raise the temperature to 80°C and react for 2 hours to obtain a polyurethane prepolymer.

[0061] Subsequently, 30 g of ethylene glycol was added to continue the reaction for 2 hours. If the measured NCO% was less than or...

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
Login to View More

PUM

PropertyMeasurementUnit
acid valueaaaaaaaaaa
Login to View More

Abstract

The invention provides a preparation method of soft high-solid-content waterborne polyurethane resin. The preparation method comprises the following steps: (1) mixing and dehydrating polyester polyol of which a molecular main chain contains at least one sodium sulfonate group with mixed polyalcohol, and reacting with aromatic diisocyanate to prepare a polyurethane prepolymer; (2) adding the polyurethane prepolymer prepared in the step (1) into small-molecular dihydric alcohol, and terminating; (3) diluting and emulsifying acetone, and adding an amine chain extender to react to prepare a polyurethane dispersion liquid; and (4) removing acetone in the polyurethane dispersion liquid to obtain the waterborne polyurethane resin. The preparation method provided by the invention is wide in applicability, and can be used for preparing soft waterborne polyurethane resin with different performance requirements and applications; and the prepared waterborne polyurethane resin provided by the invention has the advantages of high solid content, soft and elastic film forming, good low-temperature flexibility, high cost performance and the like, and can be widely applied to soft coating or decoration in the fields of textiles, leathers, synthetic leathers and the like.

Description

technical field [0001] The invention belongs to the field of water-based polyurethane resin preparation, in particular to a preparation method of water-based polyurethane resin with high solid content and good softness or flexibility. Background technique [0002] As a high-performance polymer material, polyurethane resin has a wide range of applications in various fields. Traditional polyurethane materials are mainly solvent-based polyurethanes, which contain a large amount of organic solvents and cause serious harm to the environment and human body. Waterborne polyurethane uses water as the dissolution medium and contains no or a small amount of organic solvents, which greatly reduces the emission of volatile organic compounds (VOC) and saves energy and resources. As the governments and folks around the world pay more and more attention to environmental protection, the restrictions on VOC emissions are becoming more and more stringent. It is a development trend to replace...

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
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08G18/66C08G18/46C08G18/32C08G18/12D06M15/572
CPCC08G18/0828C08G18/12C08G18/4018C08G18/4238C08G18/4277C08G18/44C08G18/4676C08G18/4854C08G18/6618C08G18/6651C08G18/68D06M15/572D06M2200/50C08G18/3206C08G18/3234C08G18/3228C08G18/3848C08G18/3231
Inventor 陈正林
Owner SHANGHAI LANOU CHEM IND TECH
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com