Polyurethane urea elastic fiber having high heat resistance and fine shape-setting and process for preparing same

A polyurethane urea and elastic fiber technology, applied in the field of polyurethane urea elastic fibers, can solve the problems of reducing the spinnability of the final polymer, unable to guarantee heat resistance, etc., and achieve excellent viscosity stability, avoid gelation, and improve heat resistance. Sexuality and stereotyping effects

Inactive Publication Date: 2005-06-01
TAEKWANG IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the elastic fiber disclosed in this patent, a sufficient level of heat resistance cannot be secured due to the low content of triamine
In addition, since the first-step reaction to produce the prepolymer is performed at a high temperature of more than 90°C without using a reagent that suppresses side reactions, many side reactions such as gel formation may occur, thereby reducing the yield of the final polymer. Spinnability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] Preparation of prepolymer solution

[0053] 27.4 kg of PTMEG having a molecular weight of 1,816 was added and stirred well in a batch polymerization reactor equipped with a stirrer. Then, 6.6 kg of MDI having a molecular weight of 250 was added in such a way that the MDI / PTMEG molar ratio was 1.75. Then, 41.1 g of n-butanol was added in an amount corresponding to 0.15% by weight relative to the weight of PTMEG, after which the temperature in the reactor was raised to 70° C. under a nitrogen atmosphere. Then, the mixture was reacted at the same temperature for 90 minutes to obtain a prepolymer. Thereafter, the prepolymer was cooled to 55° C. and then dissolved in 58.3 kg of DMAc to produce a prepolymer solution containing 36.9 wt% solids.

[0054] Preparation of Polyurethaneurea Polymer

[0055] The prepolymer solution produced in the above step was cooled to 5°C. At the same time, with a concentration of 5wt%, 75.5 equivalent% (500.81g) of ethylenediamine, 20.3% equ...

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PUM

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Abstract

The present invention relates to a production method of polyurethane urea elastic fiber. The method comprises: reacting polytetramethylene ether glycol with a molecular weight of 1,500-2,000, 4,4'-diphenylmethanediol in a reactor equipped with a stirrer isocyanate and n-butanol to produce a prepolymer; dissolving the prepolymer in N,N-dimethylacetamide (DMAc) or dimethylformamide (DMF) to produce a prepolymer solution; and Add the prepolymer solution to the chain extender mixture composed of amine compound, trifunctional amine and diethylamine, and use the chain extender mixture to extend the chain of the prepolymer while performing chain termination, so that the All remaining isocyanate groups of the prepolymer react to produce an elastic polyurethane urea polymer. The polyurethaneurea elastic fiber produced by the present invention has high viscosity stability, excellent strength and improved heat resistance and settability.

Description

technical field [0001] The present invention relates to a process for the preparation of polyurethane urea polymers for the production of polyurethane urea elastic fibers and polyurethane urea elastic fibers produced by said process, wherein the polyurethane urea elastic fibers remain superior to elastic yarns produced by existing batch polymerization processes Its thermal durability and strength make it stable for use with polyester in hybrid weaves and weaves. More particularly, the present invention relates to the production of polyurethaneurea elastic fibers using a batch polymerization process, wherein the polyurethaneurea elastic fibers have high viscosity stability, excellent strength, and improved heat resistance and settability. Background technique [0002] Polyurethane urea elastic fibers have excellent elasticity and elastic recovery and are commonly used in elastic fabrics. Warp-knitted fabrics of this fiber are mainly used for swimwear, fitness clothes, bicycl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/70C08G18/48C08G18/76D01F6/58
CPCD01F1/10
Inventor 李兴宰郑仁洛
Owner TAEKWANG IND CO LTD
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