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Polyamide with sulfonic acid group

A technology of sulfonic acid groups and polyamides, applied in the field of polyamides, can solve the problems of lack of dyeing fastness of cationic dyes, etc.

Inactive Publication Date: 2015-05-13
YIWU HUADING NYLON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the traditional polyamide molecular chain lacks groups that can interact with cationic dyes, so it is difficult to be dyed by cationic dyes and the fastness after dyeing is not guaranteed. Process for the preparation of polyamides with sulfonic acid groups that bind well to dyes

Method used

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  • Polyamide with sulfonic acid group

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Add 2g of 5-sulfosalicylic acid, 2.1g of polyvinylpyrrolidone and a catalyst to 40g of polybutylene adipamide, heat to melt under a nitrogen atmosphere, gradually raise the temperature to 90°C, and react at a constant temperature for 2 hours. Then gradually raise the temperature to 260°C, and react at constant temperature for 3h. The polymer was decanted from the reaction vessel and soaked several times with sufficient distilled water to remove unreacted monomer. After drying in a vacuum drying oven for 24 hours, it was melt spun at a spinning speed of 600 m / min to obtain easily dyed fibers. The dyeing properties of the fibers are listed in Table 1.

Embodiment 2

[0026] Add 5g of 2-amino-5-sulfobenzoic acid, 0.9g of polyvinylpyrrolidone and a catalyst to 40g of polyhexamethylene dodecanediamide, heat it to melt under a nitrogen atmosphere, and gradually raise the temperature to 120°C. Constant temperature reaction 1h. Then gradually raise the temperature to 280° C., and react at constant temperature for 4 hours. The polymer was decanted from the reaction vessel and soaked several times with sufficient distilled water to remove unreacted monomer. After drying in a vacuum drying oven for 24 hours, it was melt spun at a spinning speed of 600 m / min to obtain easily dyed fibers. The dyeing properties of the fibers are listed in Table 1.

Embodiment 3

[0028] Add 2g of 5-sulfosalicylic acid, 1g of polyvinylpyrrolidone and a catalyst to 40g of 11-aminoundecanoic acid, add an appropriate amount of distilled water, and heat to 200°C for 3 hours at a constant temperature under a nitrogen atmosphere. Then the temperature was gradually increased to 270 °C, and the reaction was carried out at constant temperature for 6 h. The polymer was decanted from the reaction vessel and soaked several times with sufficient distilled water to remove unreacted monomer. After drying in a vacuum drying oven for 24 hours, it was melt spun at a spinning speed of 600 m / min to obtain easily dyed fibers. The dyeing properties of the fibers are listed in Table 1.

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Abstract

The invention relates to a polyamide with a sulfonic acid group and a preparation method of the polyamide, and belongs to the field of high polymer material preparation. The polyamide with the sulfonic acid group is prepared by introducing a sulfonic acid group in the polyamide. The polyamide with the sulfonic acid group is characterized in that a monomer with the sulfonic acid group, a polyamide monomer, a catalyst and additives are mixed, a melt polymerization reaction is carried out, and the sulfonic acid group is introduced in the macromolecular structure of the polyamide, so that a polyamide chain is bonded with the lateral group of the sulfonic acid group, thus improving the cation binding performance and the hydrophilcity of the polymer material. The polyamide can be prepared into resin particles for spinning fibres and processing plastic products.

Description

technical field [0001] The invention relates to a polyamide with sulfonic acid groups and a preparation method thereof, in particular to a polyamide capable of combining with cations. Background technique [0002] Polyamide fiber is a synthetic fiber with amide bonds (-CONH-) in the macromolecular chain. Because the molecular chain contains NH, it is easy to be dyed by acid dyes, and acid dyes are combined with fibers by ionic bonds. However, acid dyes are water-soluble, and the wet fastness of polyamide products after dyeing with acid dyes is poor, so it is difficult for polyamides to have bright and bright colors. Cationic dyes are usually bright in color and can combine with reactive groups in polymers to form a strong covalent bond, thus improving the color fastness. However, the traditional polyamide molecular chain lacks groups that can interact with cationic dyes, so it is difficult to be dyed by cationic dyes, and the fastness after dyeing is not guaranteed. It is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/48C08G69/42D01F6/90D01F1/10
Inventor 刘冬青宁佐龙尹翠玉谭延坤
Owner YIWU HUADING NYLON
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