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Preparation method for anti-flaming polyurethane elastic fiber

A technology of polyurethane elasticity and polyurethane, which is applied in the manufacture of fire-resistant and flame-retardant filaments, the chemical characteristics of fibers, and the preparation of spinning solutions, etc., to achieve the effects of reducing breaking strength, reducing burning dripping, and excellent permanent flame retardancy

Active Publication Date: 2014-02-19
ZHEJIANG HUAFENG SPANDEX
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After reviewing the data, it is found that there are many flame-retardant modifications of thermoplastic polyurethane plastic TPU, but there are very few patents and documents related to the flame-retardant modification of polyurethane urea PU elastic fibers.

Method used

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  • Preparation method for anti-flaming polyurethane elastic fiber
  • Preparation method for anti-flaming polyurethane elastic fiber
  • Preparation method for anti-flaming polyurethane elastic fiber

Examples

Experimental program
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Effect test

preparation example Construction

[0021] The invention guarantees permanent flame retardancy by copolymerizing with phosphorus-based flame retardants; further enhances flame retardancy by combining with a small amount of halogen-free phosphonate flame retardants, a small amount of melamine flame retardants and aluminum oxide and other flame retardant synergists The combination of copolymerization and blending ensures the spinnability of the spinning dope and effectively reduces the burning and dripping of the fiber. Its preparation method features include:

[0022] It is made through two main processes of preparing flame-retardant polyurethane spinning dope and subsequent dry spinning. Among them, the polyurethane spinning stock solution is a prepolymer formed by condensation and addition of polyether diol and diisocyanate; the prepolymer is formed by chain extension of a phosphorus-containing flame retardant, a diamine, and a chain terminator to form a main chain containing phosphorus elements. Flame-retarda...

Embodiment 1-3

[0053] The preparation of embodiment 1-3 experimental sample

[0054] When preparing the samples of Examples 1-3, the experimental operation method was the same as that of the comparative sample, except that the chain extender with the ratio shown in Table 2 was used for chain extension.

[0055] Table 2 Experimental sample 1-3 chain extension solution material ratio data table

[0056]

[0057] Among them: 1) Number of moles: n UA +n UE +n CEPPA =n MDI -n PTMEG -n ST / 2

[0058] 2) A is the solid content of the polymer polymerized by RA2, that is, A is the sum of the mass of the following substances:

[0059] A=m PTMEG +m MDI +m UE +m UA +m CEPPA +m ST +m SPA

Embodiment 4-6

[0060] The preparation of embodiment 4-6 experimental sample

[0061] When preparing the samples of Examples 4-6, the experimental operation method is the same as that of Preparation Example 2, the difference is that, before the aging, the flame retardant of the proportion shown in Table 3 must be added to the D-FETK in addition, adding the flame retardant When using a flame retardant, first prepare the flame retardant and solvent DMAC into a solution with a mass concentration of 33.5% before adding.

[0062] Table 3 Experimental sample 4-6 Flame retardant addition data table

[0063]

[0064] Wherein: A is the solid content of the polymer polymerized by RA2, that is, A is the mass sum of the following substances:

[0065] A=m PTMEG +m MDI +m UE +m UA +m CEPPA +m ST +m SPA

[0066] Each embodiment polyurethane elastic fiber physical index is listed in table 4:

[0067] Table 4 each embodiment polyurethane elastic fiber physical index

[0068]

[0069] Among th...

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Abstract

The invention relates to a preparation method for an anti-flaming polyurethane elastic fiber. The permanent flame retardancy can be guaranteed through copolymerization with a phosphorus flame retardant; the high anti-flaming characteristic is further guaranteed through blending with a small quantity of anti-flaming auxiliaries such as a halogen-free phosphonic acid ester flame retardant, a tripolycyanamide flame retardant and an aluminum oxide flame retardant to weaken the combustion dripping performance for preparing an excellent spinning solution; the anti-flaming polyurethane elastic fiber is prepared by the spinning solution and two main subsequent dry spinning procedures. The anti-flaming polyurethane elastic fiber prepared by the method is excellent in permanent flame retardancy, free from damage to fiber elasticity, good in safety and environment-friendly, achieves good effects on preventing, delaying or terminating fire and is particularly suitable for protection suits, household articles, decoration articles and juvenile costumes used in anti-flaming occasions.

Description

technical field [0001] The invention relates to a preparation method of flame-retardant polyurethane elastic fiber. Background technique [0002] With the development of the global economy and society and the increasing awareness of human living standards and safety and environmental protection, the demand for new materials with green environmental protection, safety and health, and special properties is becoming stronger and stronger. Polyurethane elastic fiber is a synthetic fiber with excellent properties such as high elongation at break, low modulus and high elastic recovery rate, and is widely used in knitted clothing, household products and other fields. However, a major defect of polyurethane elastic fiber is its flammability. Its limiting oxygen index is only 17%. Life and property safety and living environment safety. If it is blended with polyester, nylon and other fibers, its dosage is small, but when the blended fabric is exposed to heat or fire, the flammabili...

Claims

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Application Information

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IPC IPC(8): D01F6/94D01F1/07C08G18/66C08G18/48C08G18/38C08G18/10D01D1/02D01D5/04
Inventor 周建军陈厚翔梁红军席青费长书刘亚辉许图远
Owner ZHEJIANG HUAFENG SPANDEX
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