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Preparation method of poly(m-phenylene isophthalamide) fibrid colloid polymer

A poly-m-phenylene isophthalamide and colloidal polymer technology, which is applied in the field of polymer material production, can solve the problems of high requirements for a freezing system, many process control points, large investment in production equipment, etc. The effect of stable production process and less investment in production equipment

Inactive Publication Date: 2013-11-27
东莞市灿森新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the preparation method disclosed above, due to the low temperature during the polymerization reaction, the requirements for the freezing system are high, so the investment in production equipment is large, and there are many process control points.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Example 1: In a stirred and jacketed tank reactor, 1 part by weight of polymer grade m-phenylenediamine was added to 9.7 parts by weight of dry N,N-dimethyl In acetamide, the temperature is controlled at 20~30°C, and 1.88 parts by weight of polymeric isophthaloyl chloride is continuously and slowly added for polymerization reaction, and the generated hydrogen chloride is continuously neutralized with 0.68 parts by weight of calcium hydroxide. When the temperature is lower than 70°C, the polym-phenylene isophthalamide produced by the reaction precipitates the fiber colloid polymer, the concentration of the polymer is 15.2wt%, [η]=1.92, and the pH value is 6.5; the polymer is light yellow and transparent , good quality.

Embodiment 2

[0020] Example 2: In a stirred and jacketed tank reactor, 1 part by weight of polymer grade m-phenylenediamine was added to 9.7 parts by weight of dry N,N-dimethyl In acetamide, the temperature is controlled at 30~40°C, and 1.88 parts by weight of polymer-grade isophthaloyl chloride is continuously and slowly added for polymerization reaction, and the generated hydrogen chloride is continuously neutralized with 0.68 parts by weight of calcium hydroxide. When the temperature is lower than 70°C, the polym-phenylene isophthalamide produced by the reaction precipitates the fiber colloid polymer, the concentration of the polymer is 15.2wt%, [η]=1.7, and the pH value is 6.9; the polymer is light yellow and transparent , good quality.

Embodiment 3

[0021] Example 3: In a stirred and jacketed tank reactor, 1 part by weight of polymer-grade m-phenylenediamine was added to 9.7 parts by weight of dry N-methyl-2- In pyrrolidone, control the temperature at 20~30°C, continuously and slowly add 1.88 parts by weight of polymer-grade isophthaloyl chloride for polymerization reaction, and continuously neutralize the generated hydrogen chloride with 0.68 parts by weight of calcium hydroxide, and control the temperature Below 70°C, the polym-phenylene isophthalamide produced by the reaction precipitates the fiber colloid polymer, the concentration of the polymer is 15.2wt%, [η] = 2.2, and the pH value = 6.79; the polymer is light yellow and transparent, good quality.

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PUM

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Abstract

The invention discloses a preparation method of poly(m-phenylene isophthalamide) fibrid colloid polymer. The preparation method comprises following steps: an amide-based polar organic solvent is added into a polyreactor, m-phenylenediamine is added for dissolving at a temperature of 20 to 60 DEG C; isophthaloyl dichloride is added when m-phenylenediamine is dissolved fully, and the mixture is subjected to polymerization, wherein the reaction is an exothermic reaction, so that the temperature of the reaction system is kept at 20 to 40 DEG C by using a refrigerant; after the reaction, the colloid is neutralized with an alkaline earth oxide or a hydroxide so as to obtain the poly(m-phenylene isophthalamide) fibrid colloid polymer. A low temperature (-20 to 10 DEG C) is not needed by the preparation method; investment on production equipment is less; production processes are stable; technology points and control points are few; performances of the colloid polymer are stable; and quality is excellent.

Description

Technical field: [0001] The invention relates to the technical field of polymer material production, in particular to a preparation method of polym-phenylene isophthalamide precipitated fiber colloid polymer which can be produced at normal temperature. Background technique: [0002] Poly-m-phenylene isophthalamide fiber, also known as aramid 1313, has the characteristics of high temperature resistance, high strength, high modulus and small deformation, and has the excellent properties of steel wire, rayon and nylon fiber. Known as "steel wire", aramid 1313 is widely used in various aspects of the national economy such as aerospace, electromechanical, construction, automobiles, and sporting goods due to its excellent performance. [0003] At present, the commonly used polymerization method in China is low temperature solution polymerization. phenylenediamine, and generate hydrogen chloride as a by-product at the same time; step (2) neutralize the hydrogen chloride in step (1...

Claims

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Application Information

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IPC IPC(8): C08G69/32C08G69/46
Inventor 钟彤
Owner 东莞市灿森新材料有限公司
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