Reactive Trichromatic Dye Set for Reproducible Cellulose Dyeing
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Solution Overview
Problem
The existing reactive trichromatic sets for dyeing cellulose fibers face issues with leveling and reproducibility due to dissimilar affinities, reactivities, and temperature dependencies of dyestuffs, leading to color variations and inefficiencies in dyeing processes, especially with the growth of fiber varieties and automation in dyeing plants.
Innovation Solution
A reactive trichromatic set comprising a specific red reactive dye, yellow reactive dye (C.I. Reactive Yellow 145 or C.I. Reactive Yellow 176), and blue reactive dye (C.I. Reactive Blue 194, C.I. Reactive Blue 221, or C.I. Reactive Blue 222) with high light fastness and alkali perspiration fastness, formulated to improve dyeing properties and reproducibility, including the use of alkaline metallic salts for enhanced performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional reactive trichromatic set is used for dyeing cellulose fibers, then the dyeing process can be completed, but the affinity, reactivity, and temperature dependency of different dyestuffs are dissimilar, leading to poor leveling and reproducibility
Solution Approach 1:
The patent modifies the chemical structure of reactive red dyes by introducing specific substituents (X = 3-carboxypyridinium or halogen, D = phenyl or naphthyl ring with specific substituents, Z = -SO2-CH=CH2, -SO2-CH2-CH2-OSO3H or -SO2-CH2-CH2-U) to adjust the affinity, reactivity, and temperature dependency parameters. This allows all three primary color dyes to have balanced and similar dyeing characteristics, thereby improving leveling and reproducibility while maintaining process simplicity
2Reliability
If conventional reactive trichromatic set is used, then dyeing can proceed, but staining occurs during the dyeing process due to dissimilar dyestuff properties
Solution Approach 1:
The patent changes the chemical parameters of the reactive red dye by specifying particular structural components (X, D, Z groups) to achieve balanced affinity and reactivity across all primary color dyes. This parameter optimization ensures uniform dyeing behavior, preventing staining caused by differential dyeing rates while maintaining the effectiveness of the dyeing process
3Object-affected harmful factors
If conventional reactive trichromatic set is used, then basic dyeing function is achieved, but light fastness and perspiration-light fastness are insufficient
Solution Approach 1:
The patent optimizes the chemical structure of reactive red dyes by selecting specific substituents (halogen atoms, phenyl/naphthyl rings with electron-donating or withdrawing groups, and specific reactive groups Z) that enhance light fastness and perspiration-light fastness properties. These structural modifications improve the durability and fastness characteristics of the dyed cellulose fibers without requiring additional dyestuff components
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 trichromatic set achieves superior reproducibility, high light fastness, and alkali perspiration fastness, improving Right First Time production with balanced affinity and reactivity, resulting in consistent and durable dyeing results for cellulose fibers and cellulosic blended fibers.
Implementation Method 1
reactive red dye of the following formula (I)... (b) A yellow reactive dye selected from the following color index: C.I. Reactive Yellow 145 and C.I. Reactive Yellow 176; and (c) A blue reactive dye selected from the following color index: C.I. Reactive Blue 194, C.I. Reactive Blue 221 and C.I. Reactive Blue 222
Data Source
AI summary
To obtain a reactive trichromatic set has superior reproducibility, and particularly light fastness and alkali perspiration light fastness under balanced affinity and reactivity, and improving Right First Time production, for dyeing cellulose fibers or cellulosic blended fibers is disclosed in the present invention. A reactive trichromatic set comprising (a) at least one of the following reactive red dye of formula (I), wherein R1, R2, R3, X, D, Z, and n are defined the same as in the specification; (b) at least one reactive yellow dye selected from the following Color Index; C.I. Reactive Yellow 145 and C.I. Reactive Yellow 176; and (c) at least one reactive blue dye selected from the following Color Index; C.I. Reactive Blue 194, C.I. Reactive Blue 221 and C.I. Reactive Blue 222.