Production method of polyurethane urea elastic fiber with high heat setting efficiency

A polyurethane urea and elastic fiber technology, which is applied in the manufacturing field of polyurethane urea elastic fiber and polyurethane urea elastic fiber, can solve the problems of large negative impact on fiber elastic function and strength, decreased fiber setting efficiency, poor spinnability, etc., and achieves energy reduction. Consumption, improved setting efficiency, effect of high heat setting efficiency

Active Publication Date: 2013-12-25
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the heat setting efficiency of the polyurethane urea elastic fibers prepared by these methods has been improved to a certain extent, the negative impact on the elastic function and strength of the fibers is also relatively large, the spinnability is slightly poor, and some more complicated prod

Method used

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  • Production method of polyurethane urea elastic fiber with high heat setting efficiency
  • Production method of polyurethane urea elastic fiber with high heat setting efficiency
  • Production method of polyurethane urea elastic fiber with high heat setting efficiency

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Add 5.65 kg of DMAC and 9.5 kg of PTMEG with a number average molecular weight of 1810 into a polymerization reactor protected by a nitrogen atmosphere and stir well. Then add 3.120kg (95% equivalent) of 4,4'-MDI and 0.146kg (5% equivalent) of IPDI to the above system in a certain way and react at 42°C for 150min to obtain isocyanate-terminated polyurethane urea prepolymer . Then add 9.59 kg of DMAC to the prepolymer, continue to stir evenly, and lower the temperature to 17°C. At the same time, 523.42g (67% equivalent) of N,N'-dimethylpropylenediamine and 18.81g of isopropylamine were dissolved in 6.688kg of DMAC at a concentration of 7.5wt% to obtain a mixed amine chain extender solution for the first time , and added to the above-mentioned cooled prepolymer solution in a certain way to obtain polyurethane urea stock solution A.

[0060] Then 137.85g of ethylenediamine (30% equivalent), 26.65g of 2-methyl-1,5-pentanediamine (3% equivalent), and 8.06g of isopropylamin...

Embodiment 2 and 3

[0063] Polyurethane urea elastic fibers were prepared in the same manner as in Example 1, except that the molar ratio of 4,4'-MDI to IPDI was changed.

Embodiment 4～7

[0065] Polyurethane urea elastic fibers were prepared in the same manner as in Example 1, except that the molar ratio of dibasic secondary amines to dibasic primary amines was changed.

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PUM

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Abstract

The invention relates to a production method of polyurethane urea elastic fiber with high heat setting efficiency. The method comprises the steps of: reacting with polytetramethylene ether glycol, 4,4'diphenylmethane diisocyanate and isophorone diisocyanate in solvent to obtain isocyanate-terminated prepolymer; adding monamine compound and bis(secondary amine) compound mixed amine organic amide solution into the prepolymer for performing first chain extension, and then adding monamine compound and bis(primary amine) compound mixed amine organic amide solution for performing second chain extension to obtain polyurethane urea solution, and finally adding properly organic amide solution with low-volatile diamine and/or triamine compound into the stock solution; finally, adding 4,4'diphenylmethane urea derivatives into the generated stock solution with excessive amine; agitating the polyurethane urea stock solution at low speed and curing, then performing dry-process spinning to obtain polyurethane urea elastic fiber. According to the production method, the requirement on the setting efficiency of the polyurethane urea elastic fiber in the special fields can be met.

Description

technical field [0001] The invention relates to a manufacturing technology of polyurethane urea elastic fiber, which belongs to the technical field of polyurethane urea fiber. In particular, it relates to a production method of polyurethane urea elastic fibers with high heat setting efficiency and its products. More specifically, the present invention relates to a polyurethane urea elastic fiber prepared from a prepolymer terminated by a mixed diisocyanate component, chain-extended by a mixed diamine, and added with 4,4'-diphenylmethane urea derivatives. Background technique [0002] Polyurethane urea elastic fiber is a block type high elastic chemical fiber obtained by the reaction of polymer polyol and excess organic diisocyanate, isocyanate-terminated prepolymer and chain extension of diamine compound, commonly known as spandex (Spandex ). Due to the existence of urea structure and carbamate structure in polyurethane urea, a large number of hydrogen bonds will be genera...

Claims

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Application Information

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IPC IPC(8): D01F6/72C08G18/75C08G18/76C08G18/66C08G18/48C08G18/10
Inventor 陈厚翔周建军梁红军席青费长书
Owner ZHEJIANG HUAFENG SPANDEX
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