Copper Complex Reactive Dye for High Fastness and Tinctorial Yield
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Solution Overview
Problem
Current fibre reactive metal complex dyes do not meet the requirements for sufficient substantivity, ease of washing off unfixed dye, high tinctorial yield, and excellent fastness properties, particularly in terms of wash- and chlorine fastness, for blue dyeing and printing of textile fibre materials.
Innovation Solution
Development of a reactive blue dye with a specific copper complex structure, formulated with multiple sulfo groups and suitable salts, which can be combined with other dyes to achieve desired shades, and a process involving diazotization, coupling, and reaction with a Cu(II) salt to create a high-performance dye for textile fibre materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional reactive dyes are used, then dyeing can be performed, but tinctorial yield and reactivity are not sufficiently high
Solution Approach 1:
The patent creates a composite dye structure by forming copper complexes with reactive dye molecules. The copper ion (Cu(II)) acts as a central metal coordinated with the dye ligands, creating a composite material that combines the high reactivity and tinctorial yield of reactive dyes with the enhanced fastness properties of metal complex dyes. This composite structure achieves both high tinctorial yield and excellent fastness properties simultaneously.
2Reliability
If conventional dyes are used, then basic dyeing requirements can be met, but all-round fastness properties including light-fastness and wet-fastness are not sufficient
Solution Approach 1:
The copper complex dye structure serves multiple functions simultaneously: the copper ion provides enhanced light-fastness and wet-fastness, the reactive groups ensure high reactivity and fixation, the sulfo groups provide water solubility and ease of washing, and the overall structure maintains good substantivity. This multi-functional design achieves all-round fastness properties without requiring separate dye components for each function, thereby managing complexity efficiently.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The new reactive dyes exhibit high compatibility with other dyes, allowing for adjustable shades, high fixing degrees, and improved fastness properties, including enhanced chlorine and wash fastness, while maintaining high tinctorial strength and stability on various fibre materials.
Implementation Method 1
diazotising a compound of the formula (3) to give a diazonium salt and reacting the diazonium salt with a coupling component of formula (4)
Implementation Method 2
reacting the diazonium salt with a coupling component of formula (4) to give an azo compound of formula (10)
Implementation Method 3
reacting a compound of formula (6) with a compound of formula (7) to give a compound of formula (8)
Implementation Method 4
reacting the bisazo dye prepared in step (c) with a Cu(II) salt in aqueous solution
Data Source
AI summary
A reactive dye of formulawhereinM is hydrogen, an alkali metal or one equivalent of an alkaline earth metal,Z1 is vinyl, β-sulfatoethyl or the radical —NHCO—(CH2)3—SO2—CH2CH2Cl;R1 denotes H or sulfo; andR2 is H, methyl, methoxy or sulfo,n is the number 3;Y is vinyl or a radical —CH2—CH2-U and U is —Cl or —OSO3H,is suitable for dyeing and printing cellulosic or amide-group-containing fibre materials.