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A kind of preparation method of microscopically dispersed zirconium phosphate synergistic flame retardant spandex

A micro-dispersion and uniform technology, which is applied in the field of polyurethane elastic fiber material manufacturing, can solve the problems of uneven dispersion and good spinnability of spinning dope, and achieve the effects of reduced additive amount, good spinnability and high molecular weight

Active Publication Date: 2018-06-26
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] Technical problem: The purpose of this invention is to solve the problem of uneven dispersion of the synergistic flame retardant ZrP in spandex, and to provide a method for preparing uniformly microscopically dispersed zirconium phosphate synergistic flame-retardant spandex. The prepared spandex not only contains ZrP It has microscopic dispersion uniformity, spinning dope has good spinnability, and the synergistic flame-retardant spandex reaches the national standard for flame-retardant materials (limiting oxygen index LOI>28), with excellent mechanical properties

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0028] A preparation method of microscopically dispersed uniform zirconium phosphate synergistic flame-retardant spandex of the present invention comprises the following steps:

[0029] (1) Prepolymerization stage: at 20°C-60°C, add N,N-dimethylacetamide (DMAC) into the reaction kettle, start stirring, add oligomer polyol, and mix evenly by strong mechanical stirring, Then add diisocyanate to prepare a urethane prepolymer terminated with isocyanate (-NCO), and add DMAC solvent to fully dissolve to obtain a prepolymer solution;

[0030](2) Intercalation modified zirconium phosphate: first, disperse ZrP in DMAC solvent, stir for 24h-96h, preferably 72h, to obtain a uniformly dispersed ZrP solution; Alkanolamine, and add the above ZrP solution and protonated alkanolamine to DMAC at 30°C-80°C (preferably 50°C), raise the temperature to 30°C-80°C (preferably 70°C) and stir for 1h-24h (preferably 5h ), adding other amine compounds to obtain a mixed amine solution;

[0031] (3) Cha...

Embodiment 1

[0040] At 35°C, add N,N-dimethylacetamide (DMAC) to the reaction kettle, start stirring, add oligomer polyol, stir for 2 hours, add non-intercalated modified zirconium phosphate, stir at high speed for 3 hours, and then Add diisocyanate, polymerize at 51° C. for 2 hours, and add DMAC to prepare a prepolymer solution.

[0041] Cool the prepolymer solution to 8°C, add protonated alkanolamine and other amine compounds (without ZrP) to carry out chain extension reaction and chain termination reaction.

[0042] Phosphate ester flame retardant solution, antioxidant, matting agent, lubricating reliever, and antistatic agent are added to obtain a polyurethane spinning stock solution; finally, after the polyurethane spinning stock solution is stored and matured, the flame-retardant spandex is obtained through a dry spinning system.

Embodiment 2

[0044] At 30°C, add N,N-dimethylacetamide (DMAC) to the reaction kettle, start stirring, add oligomer polyol, stir for 2 hours, then stir at high speed for 3 hours, add diisocyanate, at 49°C After polymerization for 2 hours, DMAC was added to prepare a prepolymer solution.

[0045] Cool the prepolymer solution to 8°C, add alkanolamine intercalation modified zirconium phosphate and other amine compounds to carry out chain extension reaction and chain termination reaction.

[0046] Phosphate ester flame retardant solution, antioxidant, matting agent, lubricating reliever, and antistatic agent are added to obtain a polyurethane spinning stock solution; finally, after the polyurethane spinning stock solution is stored and matured, the flame-retardant spandex is obtained through a dry spinning system.

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Abstract

The invention relates to a preparation method of zirconium phosphate (ZrP) synergistic flame retarding spandex with the microcosmical dispersion uniformity. The method comprises the following steps that 1, a prepolymer solution is prepared; 2, a mixed amine solution is prepared; 3, a polyurethane urea solution is prepared; 4, a polyurethane spinning solution is prepared; 5, the polyurethane spinning solution is subjected to spray spinning and stretching filamentation by means of a dry spinning system, and the zirconium phosphate synergistic flame retarding spandex with the microcosmical dispersion uniformity is obtained. According to the preparation method, the purpose of solving the problem that dispersion of a synergistic flame retardant ZrP in spandex is nonuniform is achieved, and the spandex prepared through the method has the advantages that contained ZrP has the microcosmical dispersion uniformity, the spinnability of the spinning solution is good, the synergistic flame retarding spandex reaches the national standard (the limit oxygen index (LOI) is higher than 28) of nonflammable materials, and the mechanical properties are excellent.

Description

technical field [0001] The invention relates to a microscopically uniformly dispersed zirconium phosphate (ZrP) synergistic flame-retardant spandex and a preparation method thereof, belonging to the technical field of polyurethane elastic fiber material manufacturing. Background technique [0002] Polyurethane elastic fiber, commonly known as spandex, is a block copolymer containing repeated carbamate (-NH-C(=O)-O-) segments in the main chain. It has properties such as high elasticity and high elongation similar to rubber. When added to non-elastic fibers, it can greatly improve the wearing comfort of fabrics, making spandex fiber applications from underwear to outerwear, from knitting to weaving, from sportswear to Fashion clothing, from women's clothing to men's clothing, from ordinary fabrics to functional fabrics, from the clothing industry to other industries, has been comprehensively improved. [0003] Spandex fiber can be blended with polyester, nylon, viscose fiber,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/94D01F1/07C08G18/10C08G18/32
CPCC08G18/10D01F1/07D01F6/94C08G18/3271C08G18/3228
Inventor 吴志豪杨晓印温作杨邵晓林池晓智
Owner ZHEJIANG HUAFENG SPANDEX
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