Reactive Navy to Black Dye Composition for High Fixation and Build-Up
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Solution Overview
Problem
Reactive black KNB dyes have low substantativity, dye-uptake, and fixation, leading to poor build-up and difficulty in cleaning dyed fabrics, which are not adequately addressed by existing color matching products.
Innovation Solution
A reactive navy to black dye composition comprising specific dye compounds (A and B) with defined chemical structures, formulated to achieve high fixation and dye-uptake, suitable for nitrogen-containing and hydroxyl-containing fiber materials, with component A making up 5-50% and component B 50-95% of the composition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reactive black KNB dye is used, then low price and good fastness are achieved, but low substantativity and low dye-uptake occur
Solution Approach 1:
The patent combines reactive black KNB dye with reactive blue dyes (such as reactive blue 19, reactive blue 205, or their mixtures) to create a composite dye system. This composite approach allows the navy to black color effect while improving substantativity and dye-uptake through the synergistic interaction between different dye components, each contributing different properties to the overall dyeing performance.
2Reliability
If reactive black KNB dye is used, then low price is achieved, but low degree of fixation occurs
Solution Approach 1:
The composite dye system integrates reactive black KNB with reactive blue dyes that have different fixation characteristics. The reactive blue components contribute higher fixation efficiency, thereby improving the overall degree of fixation while maintaining the cost-effectiveness and washing fastness provided by the reactive black KNB base.
3Adaptability or versatility
If existing color matching products are used, then color variety is achieved, but poor build-up and difficulty in cleaning dyed fabric occur
Solution Approach 1:
The patent modifies the dye composition parameters by incorporating specific reactive blue dyes (reactive blue 19, reactive blue 205) in controlled proportions (5-50% and 50-95% mass ratios respectively). This parameter optimization improves build-up characteristics and reduces the tendency for dye to remain on fabric surfaces, making cleaning easier while preserving color matching versatility.
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 reactive navy to black dye composition exhibits excellent washing fastness, high degree of fixation, good build-up, and clear remanent dyeing liquor, significantly improving dyeing performance on nitrogen-containing and hydroxyl-containing fiber materials.
Implementation Method 1
at least one of D1 and D2 contains a fiber-reactive group, that is, —SO2Y1, —NHCO(CH2)pSO2Y2 or —CONH(CH2)qSO2Y3, wherein p=1-3, q=1-3, and Y1 ̃Y3 are each independently —CH═CH2, —C2H4OSO3H or —CH2CH2Cl
Data Source
AI summary
A reactive navy to black dye composition comprises component A and component B, wherein component A is selected from one or more compounds of formula (I), component B is selected from one or more compounds of formula (II); D1 and D2 are each independently a group represented by the following formula (a) or (b) or (c); R1-R12 are each independently selected from the group consisting of H, linear or branched C1˜C4 alkyl, C1˜C4 alkoxy and sulfo; m, n=0-3, and every R3 is each independently selected from the group consisting of amino, sulfo, ureido, C1˜C4 alkanoylamino, C1˜C4 alkoxy and C1˜C4 alkyl, every R6 is each independently selected from the group consisting of amino, hydroxyl and sulfo; X1-X3 are each independently selected from the group consisting of H, C1˜C4 alkyl, C1˜C4 alkoxy, —SO2Y1, —NHCO(CH2)pSO2Y2 and —CONH(CH2)qSO2Y3, and at least one of D1 and D2 contains a fiber-reactive group, p, q=1-3, and Y1˜Y5 are each independently selected from the group consisting of —CH═CH2, —C2H4OSO3H and —CH2CH2Cl. A reactive navy to black dye product comprising the dye composition, has the properties of good washing fastness, high degree of fixation and dye-uptake, good build-up, clear remanent dyeing liquor, and the like.