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N,N-diacetoxyethyl-m-chloroaniline series azo dyes

A technology of azo dyes and p-nitroaniline, which is applied in the field of N, can solve the problems that have not been seen, and achieve the effects of good environmental protection, high color giving power, excellent color fastness and dyeing performance

Inactive Publication Date: 2011-06-08
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The addition of m-chloroaniline and acrylonitrile at a ratio of 1:2 (molar ratio) yields N,N-dicyanoethyl m-chloroaniline, but it has not been used to synthesize azo organics, nor has it been used as an azo Application of Nitrogen Disperse Dyes in the Dyeing of Polyester Fiber, Polyurethane, Polyamide, Acetate Fiber and Their Blended Fabrics

Method used

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Abstract

The invention provides N,N-diacetoxyethyl-m-chloroaniline series azo dyes. The general formula of the dyes is shown below, wherein R1 represents H, NO2, Cl, Br or COMMUNICATION and R2 represents H, NO2, Cl, Br or CN. The preparation method of the dyes comprises the following steps: using paranitroaniline or a derivative of paranitroaniline as diazo component to perform diazotization, and then reacting with N,N-diacetoxyethyl-m-chloroaniline to obtain orange or orange-red disperse dye which can have a single structure and be used to directly prepare dyes with mixed structures. The type of dyes are used to dye polyester fiber in dye liquor which is from weakly acidic to weakly alkaline; and the dyes have bright colors, good levelling property and redyeing property, high lifting force and excellent color fastness properties.

Description

technical field The invention relates to the field of fine chemical industry, in particular to a class of N, N-dicyanoethyl m-chloroaniline series azo dyes. Background technique The addition reaction of aromatic amine and acrylonitrile can obtain the corresponding mono-addition product and double-addition product. When aromatic amine and acrylonitrile are added at a ratio of 1:1 (molar ratio), the product is called monocyanoethylation. Product, when aromatic amine and acrylonitrile are added at 1:2 (molar ratio), the product is called dicyanoethylated product, and they can be used in the synthesis of disperse dyes. Because the monocyanoethyl reaction of aromatic amines is easy to carry out under the catalysis of catalysts, the monocyanoethylation products of aromatic amines are widely used in the synthesis of disperse dyes. For example, N-cyanoethylaniline, N-ethyl-N-cyanoethylaniline, N-hydroxyethyl-N-cyanoethylaniline, N-cyanoethyl-o-chloroaniline, N-butyl-N- Cyanoethyla...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09B29/085D06P1/04D06P3/52D06P3/24D06P3/40D06P3/85D06P1/18D06P3/54D06P3/26D06P3/42C09B67/22
Inventor 赵莹唐智勇刘伟
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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