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A kind of spandex with fatigue resistance and meltability and preparation method thereof

A fatigue-resistant and spandex technology, applied in the field of spandex fiber, can solve the problems of insufficient comprehensive performance and cumbersome polymerization process, and achieve the effect of improving aesthetics and comfort, excellent fatigue resistance, and excellent elastic function.

Active Publication Date: 2017-10-24
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the polymerization process of this method is cumbersome, and the important thing is that the comprehensive performance is not outstanding enough.

Method used

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  • A kind of spandex with fatigue resistance and meltability and preparation method thereof
  • A kind of spandex with fatigue resistance and meltability and preparation method thereof

Examples

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Effect test

preparation example Construction

[0021] A kind of preparation method of spandex with fatigue resistance and meltable properties of the present invention comprises the following steps:

[0022] 1) Perform chain growth reaction of IPDI and PCL in DMAC. When the viscosity reaches 100-600Pa·s at 25°C, terminate the reaction with neopentyl alcohol, and then add triethylene glycol ether-bis(3-tert-butyl-4 -Hydroxy-5-methylphenyl) propionate to obtain a component A stock solution with a solid content of 25% to 40%;

[0023] 2) Pre-polymerize 4,4'-MDI and PTMEG in DMAC, and then use ethylenediamine for chain extension reaction. When the viscosity reaches 100-600Pa·s at 25°C, stop the reaction with diethylamine, and finally add Bis(N,N-dimethylhydrazide amino 4-phenyl)methane to obtain a component B stock solution with a solid content of 25% to 40%;

[0024] 3) fully mixing and aging the stock solution of component A containing 15% to 70% of component A and the stock solution of component B containing 30% to 85% of c...

Embodiment 1

[0035]Preparation of component A stock solution (component A accounts for 52% of the total mass of spandex): 14.672kg of PCL with a molecular weight of 2000, 1.712kg of IPDI and 3.5g of benzoic acid are placed in 33.218kg of dimethylacetamide solution React at 50°C until the viscosity of the polymer reaches 25°C and 380Pa·s, immediately add 646.66g of 10% neopentyl alcohol solution, continue the reaction for 80min, then add 1.75kg of triethylene glycol ether-bis(3- tert-butyl-4-hydroxy-5-methylphenyl)propionate, stirred evenly, and matured to obtain the stock solution of component A, which was stored for future use.

[0036] Preparation of component B stock solution: 11.786kg of PTMEG with a molecular weight of 1810 and 3.337kg of 4,4'-MDI were reacted in 15.300kg of dimethylacetamide solution at 50°C for 120min to obtain isocyanate-terminated When the prepolymer is cooled to 6°C, add 13.638kg of ethylenediamine solution with a concentration of 2.8% under high-speed shear cond...

Embodiment 2

[0040] Spandex fibers were prepared according to the same method described in Example 1, except that the percentage of component A accounting for the total mass of spandex was 15%.

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Abstract

The invention discloses spandex with fatigue resistance and meltability, which is prepared from the following substances: (1) a reaction product of polycaprolactone diols, isophorone diisocyanate and neopentyl alcohol, (2) triglycol ether-bi(3-tertiary butyl-4-hydroxy-5-methyl phenyl)propionate, (3) a reaction product of 4,4'-diphenylmethane diisocyanate, PTMEG, quadrol and diethylamine, (4) bis(N,N-dimethyl hydrazide amino4-phenyl)methane. The spandex has high meltability and heat setting efficiency at temperature larger than or equal to 85 DGE C and can prevent the phenomena of silk thread dispersing, drawing and rolling caused by scratching, tailing and repeated pulling, thereby improving attraction and comfortable degree of the fabric, and achieving the energy saving and consumption reducing aims; the spandex has excellent fatigue resistance, the fabric cannot be severely deformed due to frequent knee bending and stretching and excellent elastic performance can still be kept.

Description

technical field [0001] The invention relates to a spandex with fatigue-resistant and meltable properties and a preparation method thereof, belonging to the technical field of spandex fibers. More specifically, the spandex prepared by the present invention has excellent meltability and high heat setting efficiency at a temperature greater than or equal to 85°C, which can prevent the fabric from being detached and drawn due to scratching, cutting and repeated stretching. It can improve the aesthetics and comfort of the fabric, and achieve the purpose of saving energy and reducing consumption. It also has excellent fatigue resistance. Even if the fabric is stretched repeatedly, it can still maintain excellent elastic functions. Background technique [0002] Conventional spandex is used in fabrics, such as silk stockings. Due to scratching, cutting, and repeated stretching, spandex often causes problems such as longitudinal detachment and spinning, which will damage the uniformi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/16D01F1/10C08G18/66C08G18/42C08G18/48
CPCC08G18/10C08G18/4277C08G18/4854D01F1/10D01F8/16C08G18/282C08G18/3228
Inventor 梁红军陈厚翔杨晓印许图远王靖
Owner ZHEJIANG HUAFENG SPANDEX
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