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Preparation method of ethylene propylene diene monomer flame-retardant composite fiber material

A technology of EPDM and flame retardant compounding, which is applied in the manufacture of fire-retardant and flame-retardant filaments, fiber processing, spinning solution preparation, etc. Low energy consumption and scientific preparation method

Active Publication Date: 2014-06-25
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But, there are weak points in this production method, at first, in order to obtain the magnesium hydroxide particle with definite particle diameter and specific surface area, need the aqueous slurry of magnesium hydroxide or the aqueous slurry of magnesium hydroxide and dispersing agent place Grinding in a hot air flow with a temperature of 150-550°C and a Ray number greater than 3000, and grinding at a peripheral speed of the grinding rotor higher than 40-70m / sec, is troublesome, time-consuming, and energy-consuming; secondly, the product is only It is a semi-finished product, if it is made into fiber, it needs to be processed again

Method used

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  • Preparation method of ethylene propylene diene monomer flame-retardant composite fiber material
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  • Preparation method of ethylene propylene diene monomer flame-retardant composite fiber material

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Experimental program
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Effect test

Embodiment 1

[0019] The concrete steps of preparation are:

[0020] Step 1: First mix EPDM rubber and tetrahydrofuran solvent in a mass ratio of 2:98, and then stir at 20°C for 4 hours to obtain a mixed solution. After mixing the mixed solution with the soluble magnesium salt, place it at 20°C and stir for 7 hours; wherein, the mass ratio of the EPDM rubber in the mixed solution to the soluble magnesium salt is 100:1, and the soluble magnesium salt is magnesium chloride. spinning solution.

[0021] Step 2, the spinning solution is first placed on the electrostatic spinning machine, and the spinning voltage is 10kV, the distance between the spinneret and the drum spinning collector is 10cm, and the flow rate of the spinning solution is 0.5mL / h. spinning, to obtain approximately figure 1 The EPDM-soluble magnesium salt composite fiber shown. Then place the EPDM-soluble magnesium salt composite fiber with a concentration of 5wt% and soak it in ammonia water for 15 hours, then wash and dry ...

Embodiment 2

[0023] The concrete steps of preparation are:

[0024] Step 1: First mix EPDM rubber and tetrahydrofuran solvent in a mass ratio of 4:96, and then stir at 30°C for 3.5 hours to obtain a mixed solution. After mixing the mixed solution with the soluble magnesium salt, place it at 30°C and stir for 6.5 hours; wherein, the mass ratio of the EPDM rubber in the mixed solution to the soluble magnesium salt is 100:7, and the soluble magnesium salt is magnesium chloride. A spinning solution is obtained.

[0025] Step 2, first place the spinning solution on the electrospinning machine, and electrospin at a spinning voltage of 15kV, a distance between the spinneret and the drum spinning collector of 15cm, and a flow rate of the spinning solution of 1mL / h. silk, to obtain approximately figure 1 The EPDM-soluble magnesium salt composite fiber shown. Then place the EPDM-soluble magnesium salt composite fiber in ammonia water with a concentration of 11wt% and soak it for 12.5 hours, and t...

Embodiment 3

[0027] The concrete steps of preparation are:

[0028] Step 1: First mix EPDM rubber and tetrahydrofuran solvent at a mass ratio of 6:94, and then stir at 40°C for 3 hours to obtain a mixed solution. After mixing the mixed solution with the soluble magnesium salt, place it at 40°C and stir for 6 hours; wherein, the mass ratio of the EPDM rubber in the mixed solution to the soluble magnesium salt is 100:13, and the soluble magnesium salt is magnesium chloride, to obtain spinning solution.

[0029] Step 2, the spinning solution is first placed on the electrostatic spinning machine, and the spinning voltage is 20kV, the distance between the spinneret and the drum spinning collector is 20cm, and the flow rate of the spinning solution is 2.0mL / h. spinning, to obtain as figure 1The EPDM-soluble magnesium salt composite fiber shown. Then place the EPDM-soluble magnesium salt composite fiber at a concentration of 18wt% and soak it in ammonia water for 10 hours, then wash and dry it...

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Abstract

The invention discloses a preparation method of an ethylene propylene diene monomer flame-retardant composite fiber material. The method comprises the steps of firstly, mixing and agitating ethylene propylene diene monomer and tetrahydrofuran solution according to the mass ratio of (2-10): (90-98) to obtain a mixed solution; mixing and agitating the mixed solution with soluble magnesium salt, wherein the mass ratio of the ethylene propylene diene monomer to the soluble magnesium salt in the mixed solution is 100: (1-25) to obtain a spinning solution; then putting the spinning solution on an electrostatic spinning machine, and carrying out electrostatic spinning under the conditions that the spinning voltage is 10-30kV, the distance from a spinning jet to a spinning receiver is 10-30cm, and the flow velocity of the spinning solution is 0.5-4.0mL / h to obtain the ethylene propylene diene monomer-soluble magnesium salt composite fiber; putting the composite fiber into ammonia water of which the concentration is greater than or equal to 5wt% to soak for at least five hours, washing and drying to prepare a target product which is formed by magnesium hydrate and ethylene propylene diene monomer, of which the mass ratio is (0.2-15):100, wherein the diameter of the target product is 0.1-5 microns. The preparation method has the characteristics that the process is simple; and the time and energy are saved.

Description

technical field [0001] The invention relates to a preparation method of a flame-retardant composite fiber material, in particular to a preparation method of an EPDM rubber flame-retardant composite fiber material. Background technique [0002] Ethylenepropylene diene monomer (EPDM) is widely used in many fields such as automobile parts, wires and cables, seals and so on due to its excellent thermal stability, aging resistance, corrosion resistance, water resistance, insulation and other properties. However, as a polymer material, EPDM is extremely flammable and easily degrades under high temperature conditions, thus rendering the material useless. Therefore, in order to further meet the demand of the market for EPDM materials, people have carried out flame-retardant modification to it, so as to greatly improve the safety performance of the material, as published in CN 101415642 A in April 2009 for Chinese invention patent application A "Magnesium Hydroxide with Improved Com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F6/46D01F1/07D01D5/00D01D1/02D01D10/06
Inventor 薛萌张献顾振王欢林永兴包超田兴友
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI