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Batch polymerization method of aramid 1313

A polymerization method and technology of aramid fiber, applied in the direction of adding dyes to single-component polyamide rayon and spinning solution, can solve the problems of unstable fiber performance, poor dyeing effect, unstable production, etc., and achieve fiber easy Dyeing and finishing, simple route, good product stability

Inactive Publication Date: 2015-06-17
HANGZHOU JIULONG ARAMID FIBER
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] The present invention provides a method for intermittent polymerization of aramid fiber 1313, which mainly solves the technical problems of unstable production of 1313 spinning solution, low output, unstable fiber performance, and poor dyeing effect existing in the prior art.

Method used

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Examples

Experimental program
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Effect test

Embodiment

[0020] Embodiment: a kind of aramid fiber 1313 batch polymerization method of this example, its steps are:

[0021] a. Firstly, m-phenylenediamine is purified by flash distillation and then dissolved in cooled DMF with a concentration of 8.0-12.0%, and the temperature is lowered to minus 10 degrees in the reactor, and m-phenylenediamine, which accounts for 80-90% of the amount of m-phenylenediamine, is added. Phthaloyl chloride, isophthaloyl chloride addition process temperature is not higher than 15 degrees, after the reaction is completed, move to the next reactor;

[0022] b. Add ammonia gas to the reactor to control the pH value of the solution to 7-9;

[0023] c. Remove ammonium chloride from the solution;

[0024] d. Add isophthalic acid to the filtrate to extend the chain in the next reactor, and obtain a polymer with a target molecular weight of 150,000 CPo through online viscometer, molecular weight detector, etc.;

[0025] e. A sufficient amount of dibutylamin...

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PUM

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Abstract

The invention relates to a spinning process of aramid 1313, particularly relates to a batch polymerization method of aramid 1313 and mainly aims to solve the technical problems of instable production, low yield, instable fiber property, poor dyeing effect and the like of an aramid 1313 spinning solution in the prior art. The method comprises the following steps: performing flash distillation purification on m-phenylenediamine, dissolving in cooled polar solvent, and then adding m-phthaloyl chloride to obtain a prepolymer solution; adding ammonia gas into the prepolymer solution to neutralize hydrogen chloride therein, mechanically removing ammonium chloride therein, and then adding m-phthalic acid into the filtrate to perform chain extension so as to obtain a polymer solution; adding dibutylamine into the polymer solution to neutralize hydrogen chloride generated through chain extension polymerization, and dissolving the generated salt in the polymer solution; and finally, filtering the polymer solution, and debubbling to obtain the finished product for spinning.

Description

technical field [0001] The invention relates to an aramid 1313 spinning process, in particular to an aramid 1313 batch polymerization method. Background technique [0002] Aramid 1313, also known as meta-aramid fiber, full name "isophthalamide m-phenylene diamide", English abbreviation MPIA (Poly m phenyleneisophthalamide), is a kind of "aromatic polyamide fiber", is a new type of special Use synthetic materials. It has good flame retardancy, thermal stability, electrical insulation, chemical stability, radiation resistance and mechanical properties. Its application fields include: special protective clothing, high temperature filter materials, electrical insulation materials, industrial blankets, etc. The demand for aramid fiber at home and abroad continues to increase, and the market prospect is broad. Chinese patent discloses the preparation of a low-salt aramid fiber 1313 spinning solution and its wet spinning method (publication number: publication number CN 101285214...

Claims

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Application Information

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IPC IPC(8): C08G69/32C08G69/28C08G69/46D01F6/90D01F1/06
Inventor 冷健生汪丽华
Owner HANGZHOU JIULONG ARAMID FIBER
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