Ether Dye Fixatives for Higher Cotton Dye Uptake
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Solution Overview
Problem
Current methods for creating 'cationic cotton' to enhance dye uptake are inefficient in terms of dye uptake, generate waste, and are costly, necessitating the development of more effective and cost-efficient dye fixative agents.
Innovation Solution
The use of ether compounds of Formula I, where R1, R2, and R3 are alkyl groups with optional substitutions, and X is Cl, Br, or I, to introduce a positive charge to cotton fabrics for increased dye affinity, exemplified by compounds like N,N'-(oxybis(ethane-2,1-diyl))bis(3-chloro-2-hydroxy-N,N-dimethylpropan-1-aminium) chloride, which demonstrate improved dye fixation efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional epoxy based ammonium compounds (CR-2000) are used to create cationic cotton, then positive charge is introduced to increase dye uptake, but reaction efficiency is low (greater than 7%) and treatment cost is high
Solution Approach 1:
The patent changes the chemical parameters of the dye fixative agent by using quaternary ammonium compounds with different molecular structures and charge densities compared to conventional epoxy based agents. This results in higher reaction efficiency (greater than 10% improvement) while maintaining effective dye uptake, directly resolving the contradiction between reliability and productivity
Solution Approach 2:
The patent employs cost-effective quaternary ammonium compounds that are cheaper than conventional CR-2000 agents. By using these more economical chemicals that achieve superior performance, the treatment cost is reduced while maintaining high dye fixation efficiency, resolving the contradiction between reliability and productivity
2Reliability
If conventional dye fixative agents are used, then some dye uptake is achieved, but waste generation is high and treatment cost is high
Solution Approach 1:
The patent modifies the chemical parameters of the treatment process by using quaternary ammonium compounds with optimized molecular structures. This enables more efficient dye fixation with less chemical waste, as the agents are more effective at lower concentrations, directly addressing the contradiction between reliable dye fixation and waste reduction
Solution Approach 2:
The patent converts the potential harm of chemical waste into a benefit by using quaternary ammonium compounds that achieve superior dye fixation efficiency. The more effective agents mean less chemical is needed overall, transforming what would be waste into a more efficient, environmentally friendly process
3Reliability
If conventional additives are used for cationic cotton treatment, then some positive charge is introduced, but treatment cost is high and efficiency is low
Solution Approach 1:
The patent uses cost-effective quaternary ammonium compounds that are cheaper than conventional CR-2000 additives. These economical chemicals achieve superior charge introduction and dye fixation efficiency, directly resolving the contradiction between reliable charge introduction and low treatment cost
Solution Approach 2:
The patent changes the chemical parameters by selecting quaternary ammonium compounds with different molecular weights, charge densities, and reactivity compared to conventional agents. This optimization enables effective treatment at lower costs while maintaining or improving the quality of charge introduction, resolving the contradiction between reliability and ease of manufacture
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
These ether compounds achieve higher dye uptake and deeper color shades compared to conventional agents like CR-2000, with reduced waste and lower treatment costs, as evidenced by higher reaction efficiency and nitrogen content in treated cotton samples.
Implementation Method 1
applying to the fabric a dye fixative agent, comprising an ether compound of Formula I... to introduce a positive charge to a cotton fabric or textile for increased dye uptake, as dye particles are anionic
Data Source
AI summary
Described are dye fixative agents, comprising an ether compound, including salts, of Formula I: wherein, R1 is, independently at each occurrence, C1-C6 alkyl; R2 and R3, are, independently at each occurrence, optionally substituted C6 alkyl; and X is, independently at each occurrence, CI, Br, or I.