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A kind of single-structure caramel reactive dye and preparation method thereof

A technology of reactive dyes and caramel, applied in reactive dyes, dyeing methods, azo dyes, etc., can solve the problems of complicated process and unstable finished product, and achieve the effect of simple preparation process, easy operation and better effect

Active Publication Date: 2016-03-23
TIANJIN DEK CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the red reactive dyes are obtained through color matching, but the color matching process is controlled and affected by a series of factors such as the shading intensity of the original dye, making the finished product unstable or the process complicated.

Method used

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  • A kind of single-structure caramel reactive dye and preparation method thereof
  • A kind of single-structure caramel reactive dye and preparation method thereof
  • A kind of single-structure caramel reactive dye and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0049] A kind of single structure caramel red reactive dye has the structural formula of formula (I-1):

[0050]

[0051] The preparation method of the caramel red reactive dye of the structural formula of formula (I-1), comprises the steps:

[0052](a). Dissolution: Add 28.1g of the para-ester into a 1000ml beaker, add 200ml of water, adjust the pH to 4.5-6.0 with 15% sodium carbonate aqueous solution at room temperature, and wait for condensation after complete dissolution.

[0053] (b). One-step condensation: add crushed ice 100g in a 1000ml beaker, add 18.45g cyanuric chloride, 4 drops of ice grinding aid (the ice grinding aid is composed of 30% dioxane according to volume percentage, three Ethanolamine 30%, chloroform 30%, acetic acid 10%), ice grinding for 5 minutes, and the solution obtained in step (a) was added dropwise at a constant speed for 30 minutes. After the addition, 97% sodium bicarbonate was used to maintain pH=2.5~3.0, and the temperature 0 ~ 5 ℃, heat ...

Embodiment 2

[0060] A single-structure caramel reactive dye has a structural formula of formula (II-1):

[0061]

[0062] The preparation method of the reactive dye of the structural formula of formula (II-1), comprises the steps:

[0063] (a). Dissolution: Add 28.1g of the para-ester into a 1000ml beaker, add 200ml of water, adjust the pH to 4.5-6.0 with 15% sodium carbonate aqueous solution at room temperature, and wait for condensation after complete dissolution.

[0064] (b). One-step condensation: add crushed ice 100g in a 1000ml beaker, add 18.45g cyanuric chloride, 4 drops of ice grinding aid (the ice grinding aid is composed of 30% dioxane according to volume percentage, three ethanolamine 30%, chloroform 30%, acetic acid 10%). Ice mill for 5 minutes, and add the solution obtained in step (a) dropwise at a constant speed for 30 minutes. After the addition, use 97% sodium bicarbonate to maintain pH=2.5-3.0, temperature 0-5°C, keep warm for 4-5 hours, TLC The plate takes the com...

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Abstract

The invention relates to a single-structure dark-red reactive dye and a preparation method thereof. The single-structure dark-red reactive dye has the following general structure formula, wherein the R is SO2C2H4OSO3Na or -SO2CH=CH2. The invention further provides a preparation method of the reactive dye which is the single-structure dark-red reactive dye. The defect of preparing dark red by color matching is overcome, and the single-structure dark-red reactive dye is simple in structure, low in cost of raw materials, bright in luster and high in color fixation and firmness and has excellent repeatability and stability during dyeing.

Description

technical field [0001] The invention relates to the field of reactive dyes, in particular to a single-structure maroon reactive dye and a preparation method thereof. Background technique [0002] At present, reactive dyes are very popular for dyeing cellulose fibers, and they have bright colors. Good fastness performance, easy to use and so on. However, with the continuous update of dye technology, high color fixation rate and high performance dyes have become the main development direction. At present, most of the red reactive dyes are obtained through color matching, but the color matching process is controlled and affected by a series of factors such as the shading intensity of the original dyes, making the finished product unstable or the process complicated. The dye of the present invention is a caramel red single-structure reactive dye. It has improved the shortcomings of obtaining maroon red by color matching in the past, and has simple structure, low raw material ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09B62/51D06P1/384
Inventor 张兴华张玉卿曹世川
Owner TIANJIN DEK CHEM