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Polyisophthaloyl metaphenylene diamine fiber and preparation method thereof

A technology of polym-phenylene isophthalamide and isophthaloyl chloride, which is applied in the direction of single-component polyamide rayon, fiber treatment, spinning solution preparation, etc., and can solve the problem of polyisophthalamide The m-phenylenediamine fiber has low strength, grooves are easy to appear on the surface of the fiber, and the performance of aramid fiber is restricted. It is beneficial to fiber dyeing, high in strength and toughness, and compact in structure.

Active Publication Date: 2014-03-26
X FIPER NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The yield of fibers prepared by dry spinning is low, while the strength of polym-phenylene isophthalamide fibers prepared by wet spinning is low, easy to break, and defects such as grooves are prone to occur on the fiber surface, which seriously restricts the quality of aramid fibers. Further performance improvements

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 0.3mol of m-phenylenediamine with a purity of 99% to 300ml of amide polar organic solvent N,N-dimethylacetamide (DMAc) with a purity of more than 99%; stir for 10 minutes to dissolve completely, and then Cool to -10°C in a cooling bath, add isophthaloyl chloride in an equimolar ratio to m-phenylenediamine twice within 5 minutes into the mixed solution formed by m-phenylenediamine and amides polar organic solvents, and then Remove the cooling bath and carry out the polymerization reaction for 60 minutes, then add calcium hydroxide in an equimolar ratio to m-phenylenediamine into the mixed liquid within 10 minutes, neutralize the by-product hydrochloric acid generated by the polymerization reaction to generate hydrogen chloride, and obtain poly-m-phenylene Diformyl m-phenylenediamine spinning stock solution, at this time, the polymer concentration measured in the spinning stock solution is 23wt%, the inherent viscosity is 5.1dl / s, and the whole polycondensation reactio...

Embodiment 2

[0031] Add 0.3mol of m-phenylenediamine with a purity of 99% to 300ml of amide polar organic solvent N,N-dimethylacetamide (DMAc) with a purity of more than 99%; stir for 15 minutes to dissolve completely, then Cool to -5°C in a cooling bath, add isophthaloyl chloride in an equimolar ratio to m-phenylenediamine twice within 8 minutes to the mixed solution formed by m-phenylenediamine and amides polar organic solvents, and then Remove the cooling bath and carry out the polymerization reaction for 50 minutes, then add calcium hydroxide in an equimolar ratio to m-phenylenediamine into the mixed liquid within 10 minutes, neutralize the by-product hydrochloric acid generated by the polymerization reaction to generate hydrogen chloride, and obtain poly-m-phenylene Diformyl m-phenylenediamine spinning stock solution, at this time, the polymer concentration measured in the spinning stock solution is 21wt%, the inherent viscosity is 5.5dl / s, and the whole polycondensation reaction is ca...

Embodiment 3

[0036] Add 0.3 mol of m-phenylenediamine with a purity of 99% to 300ml of amide polar organic solvent N-methyl-2-pyrrolidone (NMP) with a purity of more than 99%; stir for 20 minutes to dissolve completely, then cool Cool in the bath to -12°C, add isophthaloyl chloride in an equimolar ratio to m-phenylenediamine into the mixed solution formed by m-phenylenediamine and amide polar organic solvent twice within 10 minutes, and then remove After cooling the bath for 40 minutes of polymerization reaction, calcium hydroxide with an equimolar ratio of m-phenylenediamine was added to the mixed solution within 10 minutes to neutralize the by-product hydrochloric acid generated by the polymerization reaction to generate hydrogen chloride to obtain poly-m-phenylenediamine Formamide m-phenylenediamine spinning stock solution, at this time, the polymer concentration measured in the spinning stock solution is 19wt%, the inherent viscosity is 5.0dl / s, and the whole polycondensation reaction i...

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Abstract

The inventioin discloses a polyisophthaloyl metaphenylene diamine fiber with the strength of 5.2-10.8 cN / dtex and the elongation at break of 2.0-5.0. The invention simultaneously discloses a preparation method of the polyisophthaloyl metaphenylene diamine fiber. The preparation method comprises steps as follows: firstly, metaphenylene diamine and isophthaloyl dichloride are subjected to polymerization reaction, and then, spinning operation is performed. According to the preparation method, gaseous hydrogen chloride produced in the dry spray stage and ammonia gas in a gas storage box react, the amount of hydrogen chloride discharged to the environment is reduced, ammonia gas and dry spray trickle are fully contacted, and forming of a macroscopic void structure during fiber solidification can be inhibited; the polyisophthaloyl metaphenylene diamine fiber prepared and obtained with the method has the advantages of compact structure, high strength and toughness, large specific surface area and convenience for fiber dyeing; and by means of the preparation method, the production efficiency of aramid fiber is improved greatly, and industrial mass production requirements of aramid fiber are met.

Description

technical field [0001] The invention relates to a method for preparing polym-phenylenediamine isophthalamide special-shaped fibers by using dry jet wet spinning technology, and belongs to the technical field of synthetic fiber preparation. Background technique [0002] Poly-m-phenylene isophthalamide fiber is called meta-aramid fiber or aramid fiber 1313 (PMIA), which is the earliest developed, largest output and most widely used organic high-performance fiber. Due to the conjugated structure formed between the meta-benzene ring and the amide bond on the main chain of the molecule and the hydrogen bond between the molecules, it has excellent thermal stability, impressive flame retardancy and excellent electrical insulation. With comprehensive utilization, a series of new functions and new products have been continuously developed, and the application fields are becoming wider and wider, and the popularity is getting higher and higher, making aramid 1313 an irreplaceable mate...

Claims

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Application Information

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IPC IPC(8): D01F6/60C08G69/32C08G69/28D01D1/02D01D5/253D01D10/00
Inventor 钟洲
Owner X FIPER NEW MATERIAL CO LTD
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