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Azo type disperse dyes in use for coloration in acid-alkalinity bath

A disperse dye and azo technology, applied in the direction of azo dyes, preparation of azo dyes, organic dyes, etc., can solve the problems of low dyeing rate, poor dyeing performance, slow dyeing speed, etc., and achieve dyeing rate High, excellent dyeing performance, fast dyeing effect

Active Publication Date: 2005-01-12
浙江昱泰染化科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The disperse dyes with the above two structures have the disadvantages of slow dyeing speed, low dyeing rate and poor dyeing performance when dyeing polyester fibers.

Method used

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  • Azo type disperse dyes in use for coloration in acid-alkalinity bath
  • Azo type disperse dyes in use for coloration in acid-alkalinity bath
  • Azo type disperse dyes in use for coloration in acid-alkalinity bath

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Control below 20°C, slowly add 7.25g (100%) sodium nitrite (0.105mol) to 80ml 93% sulfuric acid, then raise the temperature to 60-70°C and keep it for 1 hour, then cool down to 0°C Next, slowly add 19.5 grams (100%) of 3-amino-5-nitro-2,1-benzoisothiazole (0.1 mole), the temperature is lower than 5°C when adding, and keep below 5°C for 3 hours, Obtain diazo solution. At the same time, 23.2 g (100%) of N-ethyl-N (β-cyanoethoxyethyl) m-toluidine (0.1 mol) was dissolved in 10 ml of 93% sulfuric acid and 300 ml of ice water, and crushed Cool the ice to below 0°C and prepare the coupling components. Then slowly drop the diazo solution into the coupling component, control the temperature not to exceed 5°C, react at 0-5°C until the diazo component disappears, filter, wash with water until neutral, exhaust, and dry to obtain 37.9 grams of dye , and the yield was 86.5%.

Embodiment 2-3

[0032] In each embodiment, the consumption of 3-amino-5-nitro-2,1-benzoisothiazole is 0.1 mole, and other materials (wherein coupling component R 1 , R 2 As shown in table 1) proportioning (mol ratio) and operation method are with embodiment 1, and its result is:

Embodiment 2

[0033] Embodiment 2: get dyestuff 35.7 grams, yield rate is 84.2%

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Abstract

An ethyl dispersion pigment containing cyanoxethyl is made from diazocomposition of benzene ring or heterocyclic ring amine, -H-CH3 and -CH-C2H5. The process for preparing the pigment includes diazotizing diazomposition, reacting on diazotized material with coupling composition to produce dispersion pigment. The produced pigment can be single structure and also can be synthetized directly to be mixed structure or reprepared to be mixed structure when it is sold as commodity with colours from red orange to blue.

Description

technical field [0001] The invention relates to a class of β-cyanoethoxy ethyl azo-type disperse dyes in fine chemical industry and its mixture, preparation method and application. Background technique [0002] Common disperse dyes can be used to dye polyester fibers, polyamide fibers and acetate fibers, but most disperse dyes cannot dye dark colors. Moreover, the disperse dyes for dyeing polyester fibers are only suitable for dyeing in weak acid baths. [0003] European patent EP 0136619 once described a class of disperse dyes, in which the nitrogen atom of the coupling component in the azo dye is connected with a β-cyanoethoxyethyl group and a cyanoethyl group. Some dyes are already listed in the Color Index, for example: [0004] The structural formula of C.I.Disperse Orange 80 is: [0005] [0006] The structural formula of C.I.Disperse Red 169 is: [0007] [0008] The disperse dyes of the above two structures have the disadvantages of slow dyeing speed, low d...

Claims

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Application Information

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IPC IPC(8): C09B43/00
Inventor 王喆
Owner 浙江昱泰染化科技有限公司
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