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Dyeability modified meta-aramid fibers and preparation method therefor

A modified aramid fiber technology, which is applied in the field of dyeable modified meta-aramid fiber and its preparation, can solve the problems of poor flame retardancy, low fiber strength, and difficult dyeing, and achieve good light fastness and dyeing High dyeing rate, improving dye uptake and color fastness

Inactive Publication Date: 2019-12-03
YANTAI TAYHO ADVANCED MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide a kind of easily dyeable modified meta-aramid fiber and its preparation method; the method and material are used to solve the problems of difficult dyeing, low fiber strength and poor flame retardancy question

Method used

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  • Dyeability modified meta-aramid fibers and preparation method therefor
  • Dyeability modified meta-aramid fibers and preparation method therefor
  • Dyeability modified meta-aramid fibers and preparation method therefor

Examples

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preparation example Construction

[0030] The preparation process of this easily dyeable meta-aramid fiber comprises the following steps:

[0031] Step 1: Add MPD, DABAS and BAPPO in an organic solvent according to the molar ratio (85-94): (1-5): (5-10) at room temperature and in a nitrogen-drying environment, and machine at a speed of 200-2000r / min After stirring and dissolving, cool the system to -20~-10°C to form a diamine solution; the organic solvents are N,N-dimethylformamide (DMF), N,N-dimethylacetamide (DMAc) , one or more of N-methylpyrrolidone (NMP) and dimethyl sulfoxide (DMSO);

[0032] Step 2. Add IPC to the diamine solution twice within 30 minutes. The molar ratio of the added IPC to the total amount of MPD, DABAS and BAPPO added is (1.002-1.01): 1. The first time IPC is added to the total 0.3-0.7% of the mass of IPC is added, and the remaining IPC is added for the second time. During the addition of IPC, the reaction temperature is controlled to be -20--10°C. After reacting for 10-30 minutes, r...

Embodiment 1

[0036]Add MPD, DABAS, BAPPO and DMAc into a 250mL four-neck flask at room temperature and nitrogen dry environment, mechanically stir at a speed of 800r / min until dissolved, then cool the system to -15°C, add MPD, DABAS and BAPPO The molar ratio is 94:1:5.

[0037] Add IPC to the diamine solution of MPD, DABAS and BAPPO twice within 30 minutes. The mass proportion of IPC added for the first time is 50%. The solution is neutralized by adding calcium hydroxide, the temperature of the whole system is slowly raised to 70° C., and the pH value of the whole system is 7.1 to prepare a modified polym-phenylene isophthalamide polymer solution. The amount of IPC added is 0.2mol, and the molar ratio of IPC to MPD, DABAS and BAPPO is 1.002:1.

[0038] The prepared modified polym-phenylene isophthalamide polymer solution has a solid content of 17.58% and a viscosity of 62.7 Pa·s.

[0039] The modified poly-m-phenylene isophthalamide spinning solution is wet-spun to obtain an easy-to-dye ...

Embodiment 2

[0041] Add MPD, DABAS, BAPPO and DMAc into a 250mL four-neck flask at room temperature and in a nitrogen-dried environment, mechanically stir at a speed of 1000r / min until dissolved, then cool the system to -15°C, add MPD, DABAS and BAPPO The molar ratio is 94:1:5.

[0042] Add IPC to the diamine solution of MPD, DABAS and BAPPO twice within 30 minutes. The mass proportion of IPC added for the first time is 50%. Calcium hydroxide is added to the solution for neutralization, the temperature of the whole system is slowly raised to 70° C., and the pH value of the whole system is 7.5 to prepare a polymer solution of modified polym-phenylene isophthalamide. The amount of IPC added is 0.2mol, and the molar ratio of IPC to MPD, DABAS and BAPPO is 1.002:1.

[0043] The prepared modified polym-phenylene isophthalamide polymer solution has a solid content of 18.35% and a viscosity of 63.1 Pa·s.

[0044] The modified poly-m-phenylene isophthalamide spinning solution is wet-spun to prep...

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Abstract

The invention discloses dyeability modified meta-aramid fibers and a preparation method therefor. According to the method, m-phthaloyl chloride, m-phenylenediamine, sodium 3,5-diaminobenzoate and bis(3-aminophenyl)phenylphosphorus oxide serve as monomers, a modified polymetaphenylene isophthamide spinning solution is prepared in an organic solvent by employing low-temperature polycondensation, andprepared fibers have good affinity and excellent flame retardance to cationic dyes; and carboxylic acid group containing 3,5-diaminobenzoic acid monomer is added during preparation and participates in copolymerization, and a carboxylic acid group is an anionic group and can be combined with the cationic dyes by ionic bonds so as to achieve dyeability of the cationic dyes. A spinning dope of the dyeability modified meta-aramid fibers prepared by the method has good solubility and spinnability, and prepared fibers maintain original high-temperature resistance and mechanical properties, have relatively high dye uptake in the cationic dyes and are sharp in color and good in light fastness.

Description

【Technical field】 [0001] The invention belongs to the technical field of meta-aramid fiber, and in particular relates to an easily dyeable modified meta-aramid fiber and a preparation method thereof. 【Background technique】 [0002] Meta-aramid is one of the most widely used high-performance fibers. It has excellent high temperature resistance, flame retardancy, mechanical properties, electrical insulation and good textile processability. It is used in protective clothing, high-temperature filter materials, and composite materials. Wide range of applications. As clothing for special industries such as firefighting, special logos and colors are required, but the molecular structure of meta-aramid fibers is tight, and the glass transition temperature is 270 ° C. Even if some of them are barely dyed by conventional dyeing methods, the color fastness is poor. Most of the industry adopts the method of stock solution coloring to prepare colored meta-aramid fibers, that is, dyes ar...

Claims

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Application Information

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IPC IPC(8): C08G69/32C08G69/42D01F6/80D01D5/06
CPCC08G69/32C08G69/42D01D5/06D01F6/805
Inventor 关振虹宋金苓潘士东陈延平李丹
Owner YANTAI TAYHO ADVANCED MATERIALS
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