Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A kind of high concentration polyurethane urea spinning solution and preparation method thereof

A technology of polyurethane urea spinning and polyurethane urea, which is used in the preparation of spinning solutions, single-component synthetic polymer rayon, textiles and papermaking, etc., can solve the problems of branched entanglement and poor fluidity of branched polymers. , to achieve the effect of normal and stable process, stable and uniform properties, and small molecular size

Active Publication Date: 2017-05-17
ZHEJIANG HUAFENG SPANDEX
View PDF2 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the molecular weight and size of the branched chain of the branched polymer must be controlled within a certain range. If the molecular weight of the branched chain is too large and the size is too long, the branch itself will be entangled. Liquidity will become too poor

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 high concentration polyurethane urea spinning solution and preparation method thereof
  • A kind of high concentration polyurethane urea spinning solution and preparation method thereof
  • A kind of high concentration polyurethane urea spinning solution and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] 1. Add 4.0kg of PTMG2000 and 1.0kg of MDI into the reactor, and react at a constant temperature of 80°C for 2.5 hours; then add 3.6kg of organic solvent dimethylacetamide to dissolve and dilute, and cool to 15°C.

[0046] 2. Mix 67.2g of ethylenediamine and 800g of dimethylacetamide evenly, and then add dropwise to the product of step 1. The time used is controlled within 30 minutes to obtain a polymer solution with a viscosity of 800 Poise;

[0047] 3. Select 616g of polyetheramine with a relative molecular weight of 400, 8.5g of ethanolamine and 2.5kg of dimethylacetamide, mix evenly, add dropwise to the product of step 2, and control the time used within 60 minutes to obtain a polymer solution with a viscosity of 5400 Poise ;

[0048] 4. Add 10g of antioxidant auxiliary agent, 15g of light stabilizer, 25g of lubricant and 15g of dyeing auxiliary agent into the product of step 3, and fully stir for 24 hours to obtain a polyurethane urea spinning solution with a viscos...

Embodiment 2

[0050] 1. Add 4.0kg of PTMG2000 and 1.8kg of MDI into the reactor, and react at a constant temperature of 60°C for 2.0 hours; then add 3.5kg of organic solvent dimethylformamide to dissolve and dilute, and cool to 15°C.

[0051] 2. Mix 60.5g of 1,2-propylenediamine and 850g of dimethylformamide evenly, and then add it dropwise to the product of step 1. The time used is controlled within 40 minutes to obtain a polymer solution with a viscosity of 720 Poise;

[0052] 3. Select 750g of polyetheramine with a relative molecular weight of 520, mix 9.8g of n-butylamine and 3.0kg of dimethylformamide evenly, and add it dropwise to the product of step 2. The time used is controlled at 75 minutes to obtain a polymer with a viscosity of 6000 Poise substance solution;

[0053] 4. Add 20g antioxidant additive, 18g light stabilizer, 30g lubricant and 10g dyeing assistant to the product of step 3, and stir thoroughly for 16 hours to obtain a polyurethane urea spinning solution with a viscosi...

Embodiment 3

[0055] 1. Add 5.0kg of PTMG2000 and 2.2kg of MDI into the reactor, and react at a constant temperature of 72°C for 1.5 hours; then add 3.2kg of organic solvent dimethylacetamide to dissolve and dilute, and cool to 15°C.

[0056] 2. Mix 72.8g of 1,5-pentanediamine and 1.00kg of dimethylacetamide evenly, and then add it dropwise to the product of step 1. The time used is controlled within 40 minutes to obtain a polymer solution with a viscosity of 900 Poise;

[0057] 3. Select 650g of polyetheramine with a relative molecular weight of 475, mix 7.6g of n-butanol and 2.0kg of dimethylacetamide evenly, add dropwise to the product of step 2, and control the time used for 60 minutes to obtain a polymer with a viscosity of 7400Poise substance solution;

[0058] 4. Add 16g antioxidant additive, 18g light stabilizer, 35g lubricant and 13g dyeing assistant to the product of step 3, and stir thoroughly for 20 hours to obtain a polyurethane urea spinning solution with a viscosity of 7700 P...

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

No PUM Login to View More

Abstract

The invention provides a high-concentration polyurethane-urea spinning solution and a preparation method therefor. Firstly, polytetramethylene ether glycol and 4,4'-diphenylmethane diisocyanate are subjected to a prepolymerization reaction. Micromolecule diamine is used, the prepolymers are subjected to a first chain extension reaction and polymer chain segments with an appropriate molecule size are formed; Polyetheramine with three functional groups is employed as a chain extender of a secondary chain extension reaction of polyurethane-urea. By utilization of the unique chemical structure of polyetheramine, the formed polyurethane-urea has a branch chain structure, and dramatic increase of system viscosity caused by molecular weight increase or molecule winding increase during the chain extension reaction process is lowered effectively. In addition, the problem of viscosity fluctuation of the polyurethane-urea dense solution during the high-speed and long-time stirring process is solved. The mass concentration of the prepared polyurethane-urea spinning solution can reach 48-55wt%, the properties are stable and uniform, and the polyurethane-urea spinning solution is especially suitable for dry method spinning at a spinning speed of 1200m / min or more.

Description

technical field [0001] The invention belongs to the technical method of preparing polyurethane urea solution, in particular to a preparation method of high-concentration polyurethane urea spinning solution. Background technique [0002] Polyurethane urea fiber (referred to as "spandex") is widely used in high-end clothing, sweatshirts, underwear, socks, swimsuits and other textile fields due to its good elasticity. Wearing spandex-containing clothing can not only bring good comfort, but also highlight the perfect self-cultivation effect, so the proportion of spandex in fabrics is increasing, and its market demand is increasing year by year, which also prompts various manufacturers to continue to increase Spandex production capacity and increase the production efficiency of spandex. However, compared with other chemical fibers, the production efficiency of spandex is often not high. The spinning speed of ordinary dry-spun spandex is usually between 700 and 900m / min, which i...

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): D01F6/94D01D1/02C08G18/76C08G18/48C08G18/50C08G18/32C08G18/66C08G18/10
Inventor 许图远王靖陈厚翔梁红军杨晓印
Owner ZHEJIANG HUAFENG SPANDEX
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com