Trisazo Reactive Dyestuff for Cellulose Fiber Fixation
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Solution Overview
Problem
Current reactive dyes face challenges in achieving high fixation, wash-off properties, and color stability on cellulose fibers, particularly in exhaustion dyeing, cold-pad-batch dyeing, continuous dyeing, and digital printing processes.
Innovation Solution
A novel trisazo reactive dyestuff compound with specific structural features, such as good solubility and alkali-resistant solubility, is developed, allowing for effective binding with cellulose fibers and easy wash-off, suitable for various dyeing methods including exhaustion dyeing, cold-pad-batch dyeing, continuous dyeing, and digital printing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polyazo orange reactive dyestuff with multiple reactive groups is used to achieve high fixation, then fixation rate is improved, but wash-off property deteriorates
Solution Approach 1:
The patent applies local quality by introducing different types of reactive groups with distinct functions at different positions of the dyestuff molecule. Specifically, vinyl sulfone groups provide high fixation through strong covalent bonding, while quaternary ammonium groups enable good wash-off through ionic interactions that allow controlled removal. This spatial differentiation of reactive group types resolves the contradiction between high fixation and good wash-off property.
Solution Approach 2:
The patent employs parameter changes by modifying the chemical structure of reactive groups from traditional single-type reactive groups to a combination of vinyl sulfone and quaternary ammonium groups. This structural parameter change alters the bonding mechanism and interaction characteristics with cellulose fibers, enabling simultaneous achievement of high fixation rate and good wash-off property through different chemical interaction modes.
2Quantity of substance
If reactive dyestuff with high color yield is used, then color intensity is improved, but solubility and alkali-resistant solubility deteriorate
Solution Approach 1:
The patent applies parameter changes by modifying the solubility characteristics of the dyestuff through the introduction of quaternary ammonium groups, which provide excellent water solubility and alkali-resistant solubility. This chemical structural modification allows the high color yield dyestuff to maintain good solubility properties, resolving the contradiction between color intensity and solubility.
3Reliability
If traditional reactive groups are used to achieve stable binding, then binding stability is improved, but wet fastness and light fastness deteriorate
Solution Approach 1:
The patent applies local quality by differentiating the functions of different reactive groups: vinyl sulfone groups located at specific positions provide stable covalent bonding for binding stability, while quaternary ammonium groups at other positions contribute to wet fastness through ionic bonding and overall molecular stability. This spatial and functional differentiation resolves the contradiction between binding stability and fastness properties.
Solution Approach 2:
The patent employs composite materials principle by creating a hybrid reactive group system combining vinyl sulfone and quaternary ammonium groups within the same dyestuff molecule. This composite reactive system integrates the advantages of both group types - the strong covalent bonding of vinyl sulfone and the ionic bonding and stability of quaternary ammonium - thereby achieving simultaneous improvement in binding stability, wet fastness, and light fastness.
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 novel trisazo reactive dyestuff compound exhibits excellent fixation, build-up, and wash-off properties, ensuring high-quality dyeing and printing results on cellulose fibers, including natural and blended materials like cotton, linen, and rayon, with improved wet and light fastness.
Implementation Method 1
stable binding between the fibers and the dyestuffs
Implementation Method 2
diazo coupling reaction
Implementation Method 3
coupling and condensation reaction
Data Source
AI summary
The present invention relates to a novel trisazo reactive dyestuff compound of the following formula (I): wherein, R, A, B, D, and m are defined the same as in the specification. The trisazo reactive dyestuff compound of the present invention exhibits the properties of good solubility, good alkali-resistant solubility, and good wash-off, while dyeing cellulose fibers.