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High temperature resistant chromophil polyurethane elastic fiber and preparation method thereof

A technology of polyurethane elasticity and high temperature resistance, which is applied to the preparation of single-component polyurethane artificial filaments and spinning solutions, and can solve the problems of poor high temperature resistance of spandex

Inactive Publication Date: 2009-10-14
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, spandex is mainly produced by adding additives through modification to make it have high temperature resistance. However, the high temperature resistance of spandex produced by this method is not very ideal.

Method used

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  • High temperature resistant chromophil polyurethane elastic fiber and preparation method thereof
  • High temperature resistant chromophil polyurethane elastic fiber and preparation method thereof
  • High temperature resistant chromophil polyurethane elastic fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) 159.978 Kg of polytetrahydrofuran ether glycol and 36.122 Kg of 4,4-diphenylmethane diisocyanate were added simultaneously and continuously, and the polymerization reaction was carried out at a temperature of 82° C. to obtain a prepolymer. Completely dissolve the prepolymer with 325.299 Kg of N,N-dimethylacetamide to obtain a N,N-dimethylacetamide solution of the prepolymer.

[0022] (2) synchronously and continuously adding 55.846Kg of chain extender ethylenediamine and 1,2-propylenediamine and 10.990Kg of reaction control agent b diethylamine to carry out chain extension reaction to obtain N,N-dimethylethylamine of polyurethane Amide solution.

[0023] The concentration of the N,N-dimethylacetamide solution of the chain extender is 6 wt%, wherein the molar ratio of ethylenediamine to 1,2-propylenediamine is 90%:10%.

[0024] The concentration of the N,N-dimethylacetamide solution of the reaction control agent b diethylamine is 5wt%.

[0025] (3) Add anti-yellowi...

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Abstract

The invention relates to a production method of a high temperature resistant chromophil polyurethane elastic fiber which is formed by copolymerization of oligo-diatomic alcohol, diisocyanate and chain extender segment; the invention is characterized in that: the production method changes the proportion of linear amine and side methyl to obtain more crosslink points among polymer molecules and promotes the average molecular weight of the polymers and the content of hard segment to improve the high temperature resistance property of the polyurethane elastic fiber. Polyurethane spinning solution prepared by the invention has high adhesion stability, and the polyurethane elastic fiber has excellent strength, high temperature resistance and easy dyeing and can be used for producing complex woven fabric and knitted fabric with the polyester fiber.

Description

technical field [0001] The invention belongs to the field of polymer material manufacturing, and in particular relates to a method for manufacturing high-temperature-resistant and easy-to-dye polyurethane elastic fibers. The polyurethane spinning dope produced by the invention has high viscosity stability, excellent strength and the fiber can be used together with polyester with high dyeing temperature to produce mixed woven fabrics and mixed knitted fabrics. Background technique [0002] With the widening of the use and application range of polyurethane elastic fibers, especially when spandex and polyester fibers are woven together or knitted textiles are dyed, high temperature of about 130°C is required for long-term dyeing treatment, and polyurethane elastic fibers have poor dyeability. In particular, it does not have high temperature resistance. Under high temperature conditions, the physical properties of polyurethane elastic fibers are severely damaged, and the fibers...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/70C08G18/66C08G18/10D01D1/02
Inventor 杨从登席青徐宁梁红军张礼华吴庆治费长书
Owner ZHEJIANG HUAFENG SPANDEX