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Sea-island structure chlorine-resistant polyurethane and preparation method thereof

A sea-island structure, chlorine-resistant technology, used in rayon manufacturing, textile and papermaking, conjugated synthetic polymer rayon, etc., can solve the problem of large addition of aluminum and magnesium carbonate salts, and achieve excellent product performance and easy promotion. , the effect of mature manufacturing process

Active Publication Date: 2020-12-25
ZHENGZHOU ZHONGYUAN SPANDEX ENG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the amount of aluminum magnesium carbonate added is relatively large, accounting for more than 3% of the mass percentage of spandex

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028]The first step: the preparation of part of the polyether polyurethane of the chlorine-resistant spandex island

[0029]1) Mix the raw material polytetramethylene ether glycol 1800 and 4,4'-diphenylmethane diisocyanate, and react at 90°C for 100min to prepare prepolymer A, in which 4,4'-diphenylmethane The molar ratio of diisocyanate to polytetramethylene ether glycol 1500 is 1.80:1;

[0030]2) Dissolve ethylenediamine, hydroxymethyldiethylamine, 1,2-dipropylamine, and 1,4-butanolamine into the solvent N,N-dimethylacetamide to form an expansion with a mass percentage concentration of 7.00% Chain agent mixture solution;

[0031]3) Add the chain extender mixture solution to the N,N-dimethylacetamide solution of the prepolymer A and stir, wherein the ratio of the number of moles of amine groups to the number of moles of isocyanate groups is 1.05 :1. Perform a reaction to form a polyurethane solution with a concentration of 40% by mass;

[0032]4) Combine 2-(2'-hydroxy-3',5'-di-tert-butylpheny...

Embodiment 2

[0043]The first step: the preparation of part of the polyether polyurethane of the chlorine-resistant spandex island

[0044]1) Mix the raw material polytetramethylene ether glycol 1500 and 4,4'-diphenylmethane diisocyanate, and react at 90°C for 100min to prepare prepolymer A, in which 4,4'-diphenylmethane The molar ratio of diisocyanate to polytetramethylene ether glycol 1500 is 1.70:1;

[0045]2) Dissolve ethylenediamine, hydroxymethyldiethylamine, 1,2-dipropylamine, and 1,4-butanolamine into the solvent N,N-dimethylacetamide to form an expansion with a mass percentage concentration of 7.00% Chain agent mixture solution;

[0046]3) Add the chain extender mixture solution to the N,N-dimethylacetamide solution of the prepolymer A and stir, wherein the ratio of the number of moles of amine groups to the number of moles of isocyanate groups is 1.04 :1, react to form a polyurethane solution with a concentration of 40% by mass;

[0047]4) Combine 2-(2'-hydroxy-3',5'-di-tert-butylphenyl)-benzotriaz...

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Abstract

The invention relates to a preparation method of sea-island structure chlorine-resistant polyurethane. The preparation method comprises the following steps of (1) preparing a polyether type polyurethane spinning solution; (2) preparing a low-molecular hydrolysis-resistant polyester type polyurethane liquid material; (3) preparing sea island type polyurethane through a special coating device; and (4) obtaining the polyurethane with excellent chlorine resistance. According to the preparation method of the chlorine-resistant polyurethane, the requirements of a few special fields on the chlorine-resistant polyurethane are met, and the durability of an elastic fabric in a chlorine ion water environment is improved.

Description

Technical field[0001]The invention relates to a functional chemical fiber and its manufacturing method and technology, in particular to a preparation method and technology of a chlorine-resistant spandex. The key is a two-component formula. The sea-island fiber is formed through a special coating device and a curing device, which not only ensures the spandex The physical properties of the polyurethane fiber also give the spandex excellent chlorine resistance.Background technique[0002]Chlorine-resistant spandex is mostly used in swimwear fabrics, which can effectively resist the damage to spandex structure caused by active chlorine in swimming pool water and seawater, and provide long-lasting elasticity for swimwear fabrics.[0003]At present, a lot of work has been carried out on the technology of chlorine-resistant spandex, and many results have been obtained, which are basically based on aluminum magnesium carbonate. The aluminum magnesium carbonate has a layered structure, which ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/16D01F1/10C08G18/66C08G18/48C08G18/32
CPCD01F8/16D01F1/10C08G18/6685C08G18/4854C08G18/3228Y02P70/62
Inventor 马立伟叶峥嵘李红伟崔跃伟
Owner ZHENGZHOU ZHONGYUAN SPANDEX ENG TECH
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