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High heat and chlorine resistant polyurethaneurea elastic fiber and preparation of thereof

一种弹性纤维、聚氨酯脲的技术，应用在连续聚合制备该聚氨酯脲弹性纤维领域，能够解决滤压降低可纺性、差分散性、黄色等问题

Active Publication Date: 2010-06-09
TAEKWANG IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But zinc oxide has the problem of yellowing by reacting with additives and being eluted during acid staining (pH 3-4)
However, gel formation in the polymer remains a problem due to absorption and poor dispersion of the uncoated chlorine-resistant material, along with this process also increases filter pressure and reduces spinnability, resulting in discoloration of the final product for yellow

Method used

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  • High heat and chlorine resistant polyurethaneurea elastic fiber and preparation of thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0093] 305.80 g of polytetramethylene ether glycol (molecular weight: 1815) and phosphoric acid (molecular weight: 98.0, 7 ppm based on the weight of polytetramethylene ether glycol) were mixed. Charge 72.72 g of diphenylmethane-4,4'-diisocyanate into a static mixer using a metering pump at 40 °C and mix with the above mixture, which is charged into a cylindrical tubular continuous polymerization tube at 80 °C , followed by 135 minutes of reaction. The reaction was adjusted so that the content of unreacted diisocyanate at the end was 2.64 mol%. Thus, a primary polymer having a viscosity of 620 poise was synthesized.

[0094] The primary polymer was cooled to 40°C and then stabilized within 24 hours. The polymer was continuously charged into the high shear mixer along with 608.78 g of N,N-dimethylacetamide followed by vigorous stirring at 3500 rpm for 20 seconds before charging the polymer to the secondary reactor. The primary polymer was completely dissolved and cooled to 4...

Embodiment 2

[0101] Elastic fibers were prepared according to the same method described in Example 1, except that 90 ppm of diethylenetriamine was used as a viscosity stabilizer and a crosslinking agent.

Embodiment 3

[0103] Elastic fibers were prepared according to the same method described in Example 1, except that diethylamine and 230 ppm of diethylenetriamine were added as viscosity based on the chain extender (ethylenediamine) solution in a 1 / 14 amine equivalent ratio Stabilizers and crosslinkers.

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Abstract

The present invention relates to a preparation method of polyurethaneurea elastic fiber, particularly a preparation method of high heat-resistant elastic fiber which retains unique physical properties of elastic fiber under the high temperature process. The polyurethaneurea elastic fiber of the present invention is characteristically prepared without using 1 functional mono-alcohol generally usedto regulate the reaction speed and side-reaction during the prepolymer reaction to produce elastic fiber having excellent heat- resistance particularly for the dyeing processing or re-dyeing of polyester but using ethylenediamine alone as a chain extender for the polymerization. To reduce gel formation in polymer after the secondary polymerization and to regulate change of viscosity in the courseof process, the ratio of the chain extender amine to the terminal group of prepolymer of the first polymerization is increased. The present invention relates to the polyurethaneurea elastic fiber andthe preparation method of the same having excellent chlorine resistance, which favors the production of swimsuit by two-way knitting using nylon yarn. The polyurethaneurea elastic fiber prepared by the polymer mixture of the present invention has excellent heat- resistance and chlorine-resistance, so that it is endurable in chlorine -containing water of swimming pool and can be effectively produced as high quality yarn by combined-weaving of nylon or polyester.

Description

technical field [0001] The present invention relates to a method for preparing polyurethane urea elastic fibers having excellent heat resistance and chlorine resistance, which are resistant to chlorine water in swimming pools, and have excellent heat resistance, and which are provided by blending with nylon or polyester High fabric quality for easy re-dyeing and third-dyeing in high temperature process (at least 190°C). The present invention relates to polyurethane urea elastic fibers, more specifically polyurethane urea elastic fibers having excellent heat resistance and chlorine resistance as well as viscosity stability and improved spinning properties, and methods for producing the polyurethane urea elastic fibers by continuous polymerization method. Background technique [0002] Polyurethane urea elastic fibers are prepared by dry spinning polymers obtained by chain-extending prepolymers with isocyanate-terminated prepolymers made of high-molecular-weight polyols and or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/70D01F6/72D01F1/07C08G18/10C08G18/32B29C48/05B29C48/30
CPCD01F6/70D01F1/10D01F6/72B29C48/05
Inventor 辛益基郑仁洛金海东
Owner TAEKWANG IND CO LTD
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