Amphoteric water soluble color-fixing agent and its application

A color-fixing agent and water-soluble technology, applied in the field of amphoteric water-soluble color-fixing agents, can solve the problems of small molecules of the color-fixing agent, inability to improve wet rubbing fastness, and poor film-forming properties, so as to improve the color fastness. degree of effect

Inactive Publication Date: 2006-08-02
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently used cationic color-fixing agents either have too large a color-fixing agent molecule and poor diffusion performance, making it difficult to penetrate into the interior of the fiber, or the color-fixing a

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The synthetic example of embodiment 1 polymer:

[0029]① Synthesis of amphoteric polyacrylamide water-soluble polymers: a. Polymerization: acrylic acid (need to be refined) and acrylamide monomers are mixed into an aqueous solution according to the molar ratio of (10-40): (60-90), and the concentration of the monomer aqueous solution Control it at 5-15%, and then pass nitrogen into it for 10-30 minutes, and add ammonium persulfate-sodium bisulfite redox initiator under the protection of nitrogen, the amount of which is 0.001- 0.008 mole fraction, temperature between 60℃~80℃, copolymerization reaction for 3h~5h, to obtain anionic high polymer. b. Modification: at pH=7-9, the temperature is between 50°C and 70°C, preferably 65°C, the copolymer is subjected to Mannich reaction with formaldehyde and diethylamine hydrochloride, and modified for 2h to 4h, the aqueous solution of the amphoteric color-fixing agent can be obtained.

[0030] ②Use itaconic acid...

Embodiment 2

[0034] Embodiment 2 carries out performance test to the fabric after finishing.

[0035] ① Taking amphoteric polyacrylamide water-soluble polymer as an example, the effect after finishing is compared with the effect of fixing agent Y as follows:

[0036]

Experimental sample

Original cloth

amphoteric color fixing agent

Fixing agent Y

Direct Rosé 12B

Direct Big Red 4BS

Direct Rosé 12B

Direct Big Red 4BS

Direct Rosé 12B

Direct Big Red 4BS

Dry rubbing fastness

3-4

4-5

5

5

5

5

Wet rub fastness

2-3

2

5

4

4

2-3

Soaping fastness

Staining

2

1

4

2-3

4

3

faded

2

2-3

4

4

4

4

Perspiration fastness

sour

3

2-3

4

3

5

3

alkali

3

3 ...

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PUM

PropertyMeasurementUnit
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Abstract

The present invention relates to one kind of amphoteric water soluble polymer color-fixing agent and its synthesis and use. The amphoteric water soluble color-fixing agent is suitable for color fixing of direct active dye, and can form cation radical, reactant anion radical, hydrogen bond and some radical capable of increasing the intermolecular force in water solution. It can combine with dye anion and cellulose anion through electrostatic force like cationic color fixing agent, and has active cross-linking radical, structure unit with affinity to dye and molecular weight great enough to form protecting film combining with dye and fiber to close the hydrophilic radical, lower the water solubility of dye molecule and strengthen the force between dye molecule and cellulose molecule simultaneously, so as to raise color fastness in several aspects.

Description

technical field [0001] The invention belongs to the category of printing and dyeing auxiliaries, specifically an amphoteric water-soluble color-fixing agent and its application, which can be used for color-fixing of cotton fabrics dyed with direct and reactive dyes. Background technique [0002] Direct and reactive dyes have been widely used in the dyeing of cotton fabrics due to their bright color, complete chromatogram, relatively low cost and convenient use. However, due to the chemical structure of direct dyes, most of them have hydrophilic sulfonic acid groups and carboxylic acid groups, which have strong hydrophilicity and are only combined with fibers through hydrogen bonds and Van der Waals forces, so the wet fastness is low and the color fades , Staining phenomenon is also very serious. Although reactive dyes can form covalent bonds with fibers, the stability of many dyes and fibers is not high. For example, some types of reactive dyes are not resistant to acids, a...

Claims

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Application Information

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IPC IPC(8): D06P1/52
Inventor 陆大年周天池
Owner DONGHUA UNIV
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