Preparation method of heterocyclic aramid 1313 fiber

A technology of heterocyclic aramid and fiber, which is applied in the field of preparation of heterocyclic aramid 1313 fiber, which can solve the problems of less research on the modification of aramid 1313 fiber, and achieve the effect of improving mechanical strength and performance

Active Publication Date: 2019-12-13
ZHUZHOU TIMES NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are few studies on the modification of aramid 1313 fibers, and it is urgent to research and develop a method for preparing high-performance aramid 1313 fibers

Method used

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  • Preparation method of heterocyclic aramid 1313 fiber
  • Preparation method of heterocyclic aramid 1313 fiber
  • Preparation method of heterocyclic aramid 1313 fiber

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A kind of preparation method of heterocyclic aramid fiber 1313 fiber of the present invention, its technological process schematic diagram is as figure 1 shown, including the following steps:

[0039] (1) Dissolve m-phenylenediamine and 5(6)-amino-2-(p-aminophenyl)benzimidazole in N,N-dimethylacetamide containing lithium chloride, the mass of lithium chloride 5% of the mass of N,N-dimethylacetamide to obtain a mixed solution, the temperature of the mixed solution is lowered to -15°C; according to diamine (including m-phenylenediamine and 5(6)-amino-2-( The molar ratio of p-aminophenyl) benzimidazole) and isophthaloyl chloride is 1:1.03, and the molar weight of 5(6)-amino-2-(p-aminophenyl) benzimidazole is isophthaloyl 5% of the molar weight of acid chloride, mix the mixed solution with molten isophthaloyl chloride at 20°C to obtain a heterocyclic aramid 1313 solution containing hydrogen chloride, and the content of the copolymerized modified aramid 1313 resin in this s...

Embodiment 2

[0044] A kind of preparation method of heterocyclic aramid fiber 1313 fiber of the present invention, its technological process schematic diagram is as figure 1 shown, including the following steps:

[0045] (1) m-phenylenediamine and 5(6)-amino-2-(p-aminophenyl) benzimidazole are dissolved in N,N-dimethylacetamide of lithium chloride, and the quality of lithium chloride is 5% of the mass of N,N-dimethylacetamide to obtain a mixed solution, the temperature of the mixed solution was lowered to -20°C; The molar ratio of aminophenyl) benzimidazole) and isophthaloyl dichloride is 1:1.02, and the molar weight of 5(6)-amino-2-(p-aminophenyl) benzimidazole is isophthaloyl dichloride 10% of the molar weight, mix and react the mixed solution with molten isophthaloyl chloride at 10°C to obtain a heterocyclic aramid 1313 solution containing hydrogen chloride, and the content of the copolymerized modified aramid 1313 resin in this solution is 14.5% , the logarithmic viscosity is 2.75; ...

Embodiment 3

[0050] A kind of preparation method of heterocyclic aramid fiber 1313 fiber of the present invention, its technological process schematic diagram is as figure 1 shown, including the following steps:

[0051] (1) m-phenylenediamine and 5(6)-amino-2-(p-aminophenyl) benzimidazole are dissolved in N,N-dimethylacetamide of lithium chloride, and the quality of lithium chloride is 6% of the mass of N,N-dimethylacetamide to obtain a mixed solution, the temperature of the mixed solution was lowered to -15°C; The molar ratio of aminophenyl) benzimidazole) and isophthaloyl dichloride is 1:1.02, and the molar weight of 5(6)-amino-2-(p-aminophenyl) benzimidazole is isophthaloyl dichloride 20% of the molar weight, mix the mixed solution with molten isophthaloyl chloride at 15°C to obtain a heterocyclic aramid 1313 solution containing hydrogen chloride, and the content of the copolymerized modified aramid 1313 resin in this solution is 12.5% , the logarithmic viscosity is 2.05;

[0052] (...

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Abstract

The invention provides a preparation method of heterocyclic aramid 1313 fiber. The preparation method of the heterocyclic aramid 1313 fiber includes the following steps that aromatic diamine A and aromatic diamine B are dissolved in an amide-type polar solvent, and a mixed solution is frozen for cooling and then mixed with molten isophthaloyl chloride for reaction under a low temperature environment to obtain a heterocyclic aramid 1313 solution; a neutralizing agent is used for to neutralization and impurity removal of the heterocyclic aramid 1313 solution to obtain a spinning dope; the spinning dope is subjected to high-temperature vacuum defoaming and filtering, then passes through a spinneret and a layer of air, enters into a first-stage coagulation bath, and is subjected to a second-stage coagulation bath, hot water drawing, water washing, drying, oiling, dry heat stretching, heat setting, cooling and oiling, and winding to obtain the heterocyclic aramid 1313 fiber. The preparation method of the heterocyclic aramid 1313 fiber can improve the mechanical strength, initial modulus, and heat resistance of aramid fiber, is conducive to the preparation of high-performance meta-aramid products, and lays a foundation for the application of the aramid 1313 fiber in more demanding fields.

Description

technical field [0001] The invention belongs to the technical field of spinning fibers, in particular to a method for preparing heterocyclic aramid 1313 fibers. Background technique [0002] Aramid 1313 fiber is meta-aramid fiber, which has many irreplaceable characteristics of other aramid fibers, and is widely used in aerospace, rail transit, electrical insulation, and flame-retardant protection fields. Modification of aramid 1313 fiber can further improve its strength and modulus on the basis of retaining the original characteristics, which can broaden its application field and increase its economic value. At present, there are few studies on the modification of aramid 1313 fibers, and it is urgent to research and develop a method for preparing high-performance aramid 1313 fibers. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a method for preparing heterocyclic aramid 1313 fibers with high heat resistance, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/80C08G69/32D01D5/06D01D5/14D01D10/02D01D10/06
CPCC08G69/32D01D5/06D01D5/14D01D10/02D01D10/06D01F6/805
Inventor 曹凯凯杨军杨佑王进刘含茂程海涛
Owner ZHUZHOU TIMES NEW MATERIALS TECH
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