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Preparation method of formaldehyde-free active dye fixing agent

A technology of reactive dyes and fixatives, used in dyeing, textiles and papermaking, etc., can solve the problems of discoloration, high dyeing cost, and increased dye consumption.

Inactive Publication Date: 2010-07-07
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Vat dyes make cotton dyed with better fastness, but the price is expensive, the price of reducing agent used in dyeing is also high, and the dyeing process is complicated, the dyeing cost is much higher than other dyes; direct dyes only rely on van der Waals force, hydrogen bond Combining with fibers, the binding force between dyes and fibers is small, and its wet rubbing fastness is poor; when sulfur dyes (including liquid sulfur dyes) dye dark colors, the wet rubbing fastness is not ideal; reactive dyes have complete chromatograms, bright colors, Low cost and easy to use, it has become a widely used cotton dye, and its demand is increasing year by year
Yet, along with the increase of reactive dyestuff application, also expose following problem: (1) because the existence of the free dyestuff that is not fixed on the cotton fiber and hydrolyzed reactive dyestuff, cause the decline of cotton dyeing fixation rate, washability is poor, The consumption of dyestuffs, water, electricity, and steam increases; (2) reactive dyes are combined with fibers by covalent bonds, and the fastness is strong, but when dyeing medium and dark colors, the wet rubbing fastness is low, and the dyed products Under the influence of factors such as sunlight, sweat, active chlorine, oxygen-based bleach, heat, acid gas and water, it is easy to cause discoloration, fading, fading and shifting and washing pollution
Therefore, in order to overcome the unsatisfactory wet rubbing fastness of reactive dyes and limit the mass fraction of formaldehyde on textiles, it is necessary to use formaldehyde-free color-fixing agents to improve the color fastness of reactive dyes for cotton
[0003] At present, domestic and foreign patents and literatures have not yet reported the formulation method of the new reactive dye fixing agent involved in the present invention, and this new formaldehyde-free color fixing agent has wide application value and prospects in textile finishing

Method used

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  • Preparation method of formaldehyde-free active dye fixing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: Select the cotton fabric dyed with reactive brilliant red X-3B.

[0017] (1) Add 1 part by weight of chitosan to an aqueous solution containing 1 part by weight of sodium hydroxide, use isopropanol as a solvent, heat to 55°C under stirring, basify at a constant temperature for 4 hours, then heat to 60°C in a water bath, and place the reaction vessel in an ultrasonic On the cleaning instrument, under the power of 100W, add 6 parts by weight of a solution of 3-chloro-2-hydroxypropyltrimethylammonium chloride dropwise, and control the rate of addition. Material; the slurry is adjusted to pH=7.0 with hydrochloric acid of ω=0.1 and suction filtered, and the filter residue is soaked and washed with 60ml ω=0.85 ethanol aqueous solution and suction filtered (repeated three times), and continued to be soaked and washed with dehydrated alcohol and suction filtered (repeated three times) ; Finally, the material is placed in a blast drying oven, and dried to a constan...

Embodiment 2

[0025] Choose Reactive Brilliant Blue X-B R Dyed cotton fabric.

[0026] (1) Add 1 part by weight of chitosan to an aqueous solution containing 1 part by weight of sodium hydroxide, use isopropanol as a solvent, heat to 55°C under stirring, basify at a constant temperature for 4 hours, then heat to 60°C in a water bath, and place the reaction vessel in an ultrasonic On the cleaning instrument, under the power of 100W, add 6 parts by weight of a solution of 3-chloro-2-hydroxypropyltrimethylammonium chloride dropwise, and control the rate of addition. Material; the slurry is adjusted to pH=7.0 with hydrochloric acid of ω=0.1 and suction filtered, and the filter residue is soaked and washed with 60ml ω=0.85 ethanol aqueous solution and suction filtered (repeated three times), and continued to be soaked and washed with dehydrated alcohol and suction filtered (repeated three times) ; Finally, the material is placed in a blast drying oven, and dried to a constant weight at a temper...

Embodiment 3

[0035] Select the cotton fabric dyed with reactive bright yellow K-6G.

[0036] (1) Add 1 part by weight of chitosan to an aqueous solution containing 1 part by weight of sodium hydroxide, use isopropanol as a solvent, heat to 55°C under stirring, basify at a constant temperature for 4 hours, then heat to 60°C in a water bath, and place the reaction vessel in an ultrasonic On the cleaning instrument, under the power of 100W, add 6 parts by weight of a solution of 3-chloro-2-hydroxypropyltrimethylammonium chloride dropwise, and control the rate of addition. Material; the slurry is adjusted to pH=7.0 with hydrochloric acid of ω=0.1 and suction filtered, and the filter residue is soaked and washed with 60ml ω=0.85 ethanol aqueous solution and suction filtered (repeated three times), and continued to be soaked and washed with dehydrated alcohol and suction filtered (repeated three times) ; Finally, the material is placed in a blast drying oven, and dried to a constant weight at a ...

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Abstract

The invention relates to a preparation method of a formaldehyde-free active dye fixing agent. The compound prescription of the active dye fixing agent consists of two components, component 1 is chitosan quaternary ammonium salt produced by 3-chlorine-2-hydroxypropyl trimethyl ammonium chloride grafted with chitosan under ultrasonic, and component 2 is reactive fixing agent produced after reaction of one weight part of triethylene tetramine and three weight parts of epoxy chloropropane; the mass ratio of the component 1 and the component 2 is 1:3. The method of the invention can be applied to fixing treatment of cotton fabric dyed by active dye, can improve rubbing fastness, washing fastness and light fastness of the fabric without influence on the chromatic light and the fabric hand feel; the prepared fixing agent which is free from formaldehyde, nontoxic and environment-friendly is a novel printing and dyeing assistant.

Description

Technical field: [0001] The invention relates to a preparation method of a formaldehyde-free reactive dye fixing agent, belonging to the technical field of new printing and dyeing auxiliaries. It can be applied to the color-fixing treatment of cotton fabrics dyed with reactive dyes. Background technique: [0002] At present, there are many kinds of dyes used for dyeing cotton fabrics, including vat dyes, direct dyes, sulfur dyes, reactive dyes and other varieties. Vat dyes make cotton dyed with better fastness, but the price is expensive, the price of reducing agent used in dyeing is also high, and the dyeing process is complicated, the dyeing cost is much higher than other dyes; direct dyes only rely on van der Waals force, hydrogen bond Combining with fibers, the binding force between dyes and fibers is small, and its wet rubbing fastness is poor; when sulfur dyes (including liquid sulfur dyes) dye dark colors, the wet rubbing fastness is not ideal; reactive dyes have com...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D06P5/08D06P3/66
Inventor 吕洲董朝红牛田云
Owner QINGDAO UNIV
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