Composite active black dye

Abstract

The invention discloses a composite active black dye, which comprises the following components in percentage by weight: 60 to 80 percent of component A shown in a formula (1), 10 to 30 percent of component B shown in a formula (2), and 10 to 20 percent of dye component C shown in a formula (3). The composite active black dye is suitable for pad dyeing and printing of cellulose fabrics, has high black degree, excellent color fastness, easy water washing performance and economy, and has excellent selectivity to cellulose fibers.

Description

technical field [0001] The invention belongs to the technical field of dyes, in particular to a composite reactive black dye. Background technique [0002] In order to improve the wash fastness of dyes, people have been trying to create a dye that can be covalently bonded to the fiber. In 1956, the British ICI company first produced reactive dyes for cotton containing dichloro-s-triazine active groups. Since then, various countries in the world have successively developed and produced various types of reactive dyes. Currently, reactive dyes have developed into the most important class of dyes for cellulose fibers. [0003] Black dye has always been the most used variety in dyes, currently on the market with reactive black 5 # Vinylsulfone-based reactive black printing products are dominant, but vinylsulfone-based dyes have poor alkali resistance, and the storage stability of the color paste is not good. After printing, drying at high temperature will speed up the 5 # Hydr...

AI Technical Summary

Problems solved by technology

[0003] Black dye has always been the most used variety in dyes, currently on the market with reactive black 5 # Vinylsulfone-based reactive black printing products are dominant, but vinylsulfone-based dyes have poor alkali resistance, and the storage stability of color paste is not good. After printing, drying at high temperature will speed up the 5 # Hydrolysis, after steaming, the color appears brown and the color changes seriously

At the same time, the dyed finished fabric has a hard hand feeling, and the color fastness indicators have not fully met the customer's requirements.

[0004] The Chinese patent whose publication number is CN101100559B discloses a composite reactive black dye, which uses a chloro-s-triazine group and an ethyl sulfone group as active groups at the same time, and has the following disadvantages: one is that the blackness is not ideal; Second, there is a big difference in the directness and water solubility of the fiber, and the compatibility is not good enough; third, some fastness is not ideal

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