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Preparation method of flame retardation spandex fibers

A technology of spandex fiber and polyurethane polymer is applied in the field of textile fibers, which can solve the problems affecting the reaction process and physical properties of spandex, and achieve the effects of ensuring uniformity and spinnability, good flame retardant performance and good flame retardant performance.

Active Publication Date: 2016-03-23
YANTAI TAYHO ADVANCED MATERIALS CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] The Chinese invention patent with the authorized publication number CN103590138B discloses a preparation method of flame-retardant polyurethane elastic fiber, which uses -COOH and HPO 2 2- A phosphorus-based flame retardant is used as a reactive flame retardant, and the method of copolymerization and flame-retardant modification is used to obtain flame-retardant polyurethane elastic fibers; but according to the structural analysis of spandex, this flame retardant is compatible with amines during chain extension. Adding chain agent together will definitely affect the reaction process and physical properties of spandex

Method used

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  • Preparation method of flame retardation spandex fibers

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Embodiment 1

[0024] Example 1: In DMAC solution, polyether diol and diisocyanate are reacted at a molar ratio of 1: (1.55~2.15) to prepare a prepolymer, and the prepolymer is then reacted with a mixed amine chain extender. A polyurethane polymer solution of desired viscosity is prepared. Then add antioxidants, anti-yellowing agents and other additives to the polyurethane polymer solution, mix well, mature, and spin.

Embodiment 2

[0025] Example 2: In DMAC solution, polyether diol and diisocyanate are reacted at a molar ratio of 1: (1.55~2.15) to prepare a prepolymer, and the prepolymer is then reacted with a mixed amine chain extender for chain extension. A polyurethane polymer solution of desired viscosity is prepared. Then add the flame retardant and other additives such as antioxidant and anti-yellow agent to the polyurethane polymer solution, mix evenly, mature and spin. Among them, the halogen-free phosphorus-based flame retardant is preferably polyphenylsulfone diphenylphosphonate (PSPPP), and the addition amount of PSPPP is 1% of the total weight of the flame-retardant spandex fiber. PSPPP has the following structure:

[0026]

Embodiment 3

[0027] Embodiment 3: produce spandex fiber by the same method described in embodiment 2, wherein the addition amount of PSPPP is 3% of flame-retardant spandex fiber gross weight.

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Abstract

The invention relates to a preparation method of flame retardation spandex fibers. The method comprises the following steps: 1, reacting polyether glycol with diisocyanate in a DMAC (dimethyl acetamide) solution according to a molar ratio of polyether glycol to diisocyanate of 1:1.55-1:2.15 to prepare a prepolymer, and carrying out a chain extension reaction on the prepolymer and a mixed amine chain extender to prepare a polyurethane polymer solution with the viscosity meeting spinning requirements; and 2, adding a phenylphosphonate halogen-free phosphorus flame retardant, a nonmetal oxide synergistic flame retardant, a dyeing assistant and other assistants to the polyurethane polymer solution, mixing until uniformity, slaking the obtained solution, and spinning the slaked solution. Compared with fibers in the prior art, the fibers obtained in the invention have the advantages of environmental protection, good spinnability, no influences of the halogen-free phosphorus flame retardant on the performances of spandex, no introduction of other metal ions by the synergistic flame retardant, and meeting of Oeko-Tex100 standards.

Description

technical field [0001] The invention relates to textile fibers, in particular to a method for preparing flame-retardant spandex fibers. Background technique [0002] With the development of science and technology and the enhancement of people's safety awareness, the requirements for the flame retardancy of fiber products are becoming more and more prominent; in the fields of clothing textiles, interior decoration fabrics, transportation, protection and industrial textiles, flame-retardant Correspondingly, there are more types of fibers with flame retardant properties: flame retardant viscose fiber, flame retardant polyacrylonitrile fiber (acrylic fiber), flame retardant polyvinyl alcohol fiber (vinylon), flame retardant poly Ester fiber (polyester), flame retardant polypropylene fiber (polypropylene fiber), flame retardant polyamide fiber (nylon), flame retardant polyaramid fiber (aramid fiber), and PBI fiber, PPS fiber and PTO fiber, etc. And spandex, that is, polyurethane...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/94D01F1/07C08G18/48C08G18/66C08G18/10
CPCC08G18/10C08G18/4825C08G18/6681D01F1/07D01F6/94
Inventor 魏会芳王卫庆许钦一于游江
Owner YANTAI TAYHO ADVANCED MATERIALS CO LTD
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