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A kind of preparation method of dyeable polyurethane elastic fiber

A polyurethane elastic and fiber technology, which is applied in the field of polymer material preparation, can solve the problems of insufficient printing and dyeing effect, complicated adding process, general printing and dyeing effect, etc., to improve dyeability and color fastness, low cost, and easy to promote Effect

Active Publication Date: 2017-08-11
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

961159911.X introduces a method of introducing acid seat at the end of molecular chain, but due to the requirement of molecular weight, the amount of addition is limited, and the effect of printing and dyeing is average
200710015248.5 introduced a chain extender with acid seat, but it is easy to embed in the hard segment micro-domain, or limited by the rebound requirement, the addition amount is limited, and it cannot achieve a good printing and dyeing effect
201310681125.0 introduces a primary amino-based additive, but the additive must be pretreated and attached to the white carbon black, and the adding process is complicated

Method used

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  • A kind of preparation method of dyeable polyurethane elastic fiber
  • A kind of preparation method of dyeable polyurethane elastic fiber
  • A kind of preparation method of dyeable polyurethane elastic fiber

Examples

Experimental program
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Effect test

Embodiment 1

[0031] 1) Mix the raw materials polytetramethylene ether glycol and 4,4'-diphenylmethane diisocyanate, and react at 90°C for 120 minutes to prepare a prepolymer, in which 4,4'-diphenylmethane diisocyanate and The molar ratio of polytetramethylene ether glycol is 1.70:1;

[0032] 2) Preparation of mixed amine solution: dissolve ethylenediamine and propylenediamine in a molar ratio of 4:1 into the solvent N,N-dimethylacetamide, and then add diethylamine with a diamine molar content of 15% to form a mass A mixed amine solution with a percentage concentration of 6.00%;

[0033] 3) Add the mixed amine solution into the prepolymer solution and stir, wherein the molar ratio of the amine group to the isocyanate group is 1.07:1, and react to form a concentration of 35% by mass polymer solution;

[0034] 4) Preparation of easy-to-dye auxiliaries slurry: based on the solid content of the polymer, 0.5 wt% of 2-(2'-hydroxy-3', 5'-di-tert-butylphenyl)-benzotriazole) , 0.5wt% bis (N, N-di...

Embodiment 2

[0037] A solution was obtained in the same manner as described in Example 1, except that the addition amount of octadecyltrimethylammonium chloride was 5.0 wt%. After 35 hours of stirring and aging, the dyeable polyurethane elastic fiber is formed by dry spinning. Example 3:

Embodiment 3

[0038] A solution was obtained in the same manner as described in Example 1 except that the addition amount of octadecyltrimethylammonium chloride was 10.0 wt%. After 35 hours of stirring and aging, the dyeable polyurethane elastic fiber is formed by dry spinning.

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Abstract

The invention relates to a preparation method of easy-dyeing polyurethane elastic fibers, in particular to a polyurethane resin composition containing dialkyl dimethyl quaternary ammonium salt and polyurethane fibers which are made of the polyurethane resin composition and have excellent dyeing performance. The method includes the steps that 1, oligomer dibasic alcohol and an excessive amount of organic diisocyanate are subjected to primary polymerization, and prepolymer is obtained; 2, the prepolymer is dissolved in organic solvent and then reacts with diamine and monamine for conducting secondary polymerization, so that a polyurethane solution is obtained; 3, the dialkyl dimethyl quaternary ammonium salt which serves as a dyeing additive and accounts for 0.1-15wt% the weight of polyurethane polymer is added to the polyurethane solution so as to obtain a mixture, the mixture is subjected to spinning, and the easy-dyeing polyurethane elastic fibers are obtained. The preparation method is simple and convenient in implementation process and capable of being widely applied to polyurethane elastic fibers of different varieties, and the obtained polyurethane elastic fibers are easy to dye and high in colour fastness.

Description

technical field [0001] The invention relates to a method for manufacturing novel functionalized spandex fibers, in particular to a method for manufacturing spandex fibers with good dyeing properties. The invention belongs to the technical field of polymer material preparation. Background technique [0002] Spandex is a highly elastic chemical fiber with a breaking elongation of 500% to 700%, an elastic recovery rate generally greater than 90%, and a high breaking strength. Therefore, spandex fibers are widely used in knitted and woven fabrics. However, during the dyeing process of spandex fiber, it is difficult to color, which is mainly caused by the high polymer structure of spandex fiber. The high polymer structure is composed of hard segment and soft segment. The soft segment is weak in polarity, but has poor action on dyes, so it is difficult to color the spandex fiber and the color fastness is low. With the continuous improvement of national living standards, higher re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/94D01F1/10C08G18/10
Inventor 王靖晋中成王小华薛士壮钱锦费长书席青
Owner ZHEJIANG HUAFENG SPANDEX
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