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Modified poly(isophthaloyl metaphenylene diamine) for realizing easy dyeing effect of cationic dyes, and preparation method and application thereof

A poly-m-phenylene isophthalamide, cationic dye technology, applied in the direction of one-component copolyamide rayon, textile and papermaking, one-component synthetic polymer rayon, etc., can solve the dye uptake rate Limited, unsuitable, waste of slurry, etc., to save time and material costs, improve processing performance, and achieve bright colors.

Active Publication Date: 2018-03-20
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solution dyeing method can solve the dyeing problem of meta-aramid fiber to a certain extent, but the color tone of the meta-aramid fiber obtained by relying on the solution coloring method is relatively single, and the production method is not flexible, and the spinning pipeline is difficult when changing the fiber color variety. Difficult to clean, will cause a lot of slurry waste and other disadvantages, which further limits the application expansion of meta-aramid in the field of clothing
ZL201510148654.3 adopts the primary fiber dyeing method. The meta-aramid primary fiber obtained by wet spinning, coagulation, and water washing is dyed in the dyeing bath after being dispersed by ball milling, and then dried and hot-drawn. Colored meta-aramid fibers can be obtained by stretching, crimping, cutting, etc. Although this method solves the problem of single color of dope dyed fibers, it has high requirements for pigment fineness and limited dyeing rate.
[0003] The patent US4278779 improves the dyeing performance of the fiber by changing the chemical structure of the meta-aramid fiber, and uses the meta-xylylene diamine as the third monomer to copolymerize the modified poly-m-phenylene isophthalamide. The fiber obtained by blending and spinning polym-phenylene isophthalamide solution has good dye uptake, but the molecular weight of the obtained copolymer is not high, which will affect the mechanical properties of the fiber
The patent US5852087 adds cationic quaternary salts with alkylbenzenesulfonic acid groups to the solvent used for polymerization, and then mixes them with polym-phenylene isophthalamide with a certain logarithmic viscosity to obtain cationic Aromatic meta-polyamides that are easily dyed by dyes, but in this patent, there are restrictions on the logarithmic viscosity of the added polym-phenylene isophthalamide, and the operation method is complicated, which is obviously not suitable

Method used

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  • Modified poly(isophthaloyl metaphenylene diamine) for realizing easy dyeing effect of cationic dyes, and preparation method and application thereof
  • Modified poly(isophthaloyl metaphenylene diamine) for realizing easy dyeing effect of cationic dyes, and preparation method and application thereof
  • Modified poly(isophthaloyl metaphenylene diamine) for realizing easy dyeing effect of cationic dyes, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) In a dry environment where the humidity is kept below 30%, nitrogen is passed through a 250mL four-neck flask equipped with a mechanical stirrer and a thermometer for 20min, nitrogen is filled to catch oxygen, and MPD, 2,4-diaminobenzenesulfonic acid Add sodium, 4,4'-ODA, 150mL N,N-dimethylacetamide DMAC into the above four-neck flask, stir at room temperature for 25min to dissolve, and obtain a diamine solution, in which MPD, sodium 2,4-diaminobenzenesulfonate, The molar ratio of 4,4'-ODA is 90:7:3.

[0034] (2) Transfer the entire dissolving device of the diamine solution obtained in step (1) to a low-temperature refrigerated circulating bath at -15°C for 15 minutes to make the temperature of the diamine solution drop to -10°C, add IPC, and adjust the amount of IPC added Rate control The temperature of the reaction solution is kept at 15-20°C. After the first addition of IPC, the reaction device is transferred to room temperature and stirred at a high speed (1000r...

Embodiment 2

[0038] (1) In a dry environment where the humidity is kept below 30%, nitrogen is passed through a 250mL four-neck flask equipped with a mechanical stirrer and a thermometer for 20min, nitrogen is filled to catch oxygen, and MPD, 2,4-diaminobenzenesulfonic acid Add sodium, 3,4'-ODA, 150mL N,N-dimethylacetamide DMAC into the above four-neck flask, stir at room temperature for 25min to dissolve, and obtain a diamine solution, in which MPD, sodium 2,4-diaminobenzenesulfonate, The molar ratio of 3,4'-ODA is 90:7:3;

[0039] (2) Transfer the entire dissolving device of the diamine solution obtained in step (1) to a low-temperature refrigerated circulating bath at -15°C for 15 minutes to make the temperature of the diamine solution drop to -10°C, add IPC, and adjust the amount of IPC added Rate control The temperature of the reaction solution is kept at 15-20°C. After the first addition of IPC, the reaction device is transferred to room temperature and stirred at a high speed (1000r...

Embodiment 3

[0043] (1) In a dry environment where the humidity is kept below 30%, nitrogen is passed through a 250mL four-neck flask equipped with a mechanical stirrer and a thermometer for 20min, nitrogen is filled to catch oxygen, and MPD, 2,4-diaminobenzenesulfonic acid Add sodium, 4,4'-ODA, and 150mL NMP into the above-mentioned four-neck flask, stir and dissolve at room temperature to obtain a diamine solution, wherein the molar ratio of MPD, sodium 2,4-diaminobenzenesulfonate, and 4,4'-ODA is 93:5:2.

[0044] (2) Transfer the entire dissolving device of the diamine solution obtained in step (1) to a low-temperature refrigerated circulating bath at -15°C for 15 minutes to make the temperature of the diamine solution drop to -10°C, add IPC, and adjust the amount of IPC added Rate control The temperature of the reaction solution is kept at 15-20°C. After the first addition of IPC, the reaction device is transferred to room temperature and stirred at a high speed (1000r / min) for 20 minu...

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Abstract

The invention relates to a modified poly(isophthaloyl metaphenylene diamine) for realizing easy dyeing effect of cationic dyes, and a preparation method and application thereof. The modified poly(isophthaloyl metaphenylene diamine) is prepared from the following components of MPD (m-phenylenediamine), IPC (isophthaloyl dichloride), 2,4-diaminobenzenesulfonic acid sodium salt, and ether-containingaromatic diamine, and is prepared by performing co-condensation on the four types of monomers in an organic solvent at low temperature. The prepared modified poly(isophthaloyl metaphenylene diamine) has the advantages that the logarithmic viscosity number can reach 1.5 to 2.1dL / g, the good dissolving property is realized in the organic solvent, the spinnability is better, and the modified poly(isophthaloyl metaphenylene diamine) can be further prepared into fiber or resin. The prepared fiber has the advantages that the easy dyeing effect of the cationic dye in common-pressure boiled water dyeing bath can be realized, the high temperature-resistant property is excellent, the mechanical property is better, and the problem of difficulty in dyeing by the conventional method due to no dyeing affinity groups because of tight arrangement of meta-aramid molecules is solved.

Description

technical field [0001] The invention belongs to the technical field of modified poly-m-phenylene isophthalamide, and in particular relates to a modified poly-m-phenylene isophthalamide easily dyed by cationic dyes and a preparation method and application thereof. Background technique [0002] Because of its excellent heat resistance, flame resistance, electrical insulation, excellent high temperature acid and alkali resistance and good textile processing performance, meta-aramid fiber is widely used in the fields of protective clothing, high temperature filter material, electrical industry and composite materials. be widely used. Especially when used in various types of protective clothing, the fibers are required to have different colors. However, due to the characteristics of its molecular structure, the molecular chains of meta-aramid fibers are tightly arranged, the effect of hydrogen bonds and benzene rings leads to high fiber crystallinity, and the fiber glass transit...

Claims

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Application Information

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IPC IPC(8): C08G69/32D01F6/80
CPCC08G69/32D01F6/805
Inventor 于俊荣李娜胡祖明王彦诸静
Owner DONGHUA UNIV
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