Ether Dye Fixatives for Cationic Cotton With Lower Waste
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Solution Overview
Problem
Current methods for creating 'cationic cotton' to enhance dye uptake are inefficient, generate waste, and are costly, particularly when using epoxy-based ammonium compounds like CR-2000.
Innovation Solution
Development of ether compounds with specific alkyl and halogen substituents that introduce a positive charge to cotton fabrics, offering improved dye fixative performance with reduced waste and lower costs, exemplified by compounds such as Bis[2-(N,N-dimethylamino)ethyl]ether reacted with epichlorohydrin to produce N,N′-(oxybis(ethane-2,1-diyl))bis(3-chloro-2-hydroxy-N,N-dimethylpropan-1-aminium) chloride.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If epoxy-based ammonium compounds like CR-2000 are used to create cationic cotton, then dye uptake is improved, but waste generation increases and treatment cost increases
Solution Approach 1:
The patent changes the chemical parameters by using alternative ammonium compounds with different molecular structures ( Formula I and Formula II) compared to conventional epoxy-based compounds. These compounds have specific structural features (R1, R2, R3 alkyl groups and X halogen atoms) that modify the reaction efficiency and dye fixation mechanism, achieving comparable or superior dye uptake with reduced waste
Solution Approach 2:
The patent employs readily available ammonium compounds that can be applied directly without requiring complex epoxy-based formulations. These compounds are designed to be cost-effective alternatives that achieve the desired cationic charge on cotton fibers through simpler chemical structures, reducing both material cost and waste treatment requirements
2Quantity of substance
If epoxy-based ammonium compounds like CR-2000 are used to create cationic cotton, then dye uptake is improved, but treatment cost increases
Solution Approach 1:
The patent substitutes expensive epoxy-based ammonium compounds with cheaper alternative compounds having formulas I and II. These compounds use simpler alkyl and halogen substituents that are more cost-effective while maintaining the ability to introduce positive charges on cotton fibers for enhanced dye uptake
Solution Approach 2:
The patent modifies the chemical composition parameters by using ammonium compounds with specific structural features (Formula I and Formula II) that differ from conventional epoxy-based compounds. These parameter changes result in reduced treatment costs while achieving comparable or superior dye fixation performance
3Quantity of substance
If conventional additives are used for dye fixation, then dye uptake is achieved, but reaction efficiency is low (greater than 7% for CR-2000)
Solution Approach 1:
The patent changes the chemical structure parameters of the ammonium compounds by defining specific formulas (I and II) with variable alkyl groups (R1, R2, R3) and halogen atoms (X). These structural modifications optimize the reaction efficiency with cotton cellulose, enabling faster and more effective dye uptake compared to conventional additives like CR-2000
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 ether compounds achieve comparable or superior dye uptake efficiency to CR-2000 with reduced waste and lower treatment costs, demonstrating enhanced performance in dyeing processes.
Implementation Method 1
dye fixative agent, comprising an ether compound, including salts, of Formula I... for introducing 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 C1-C6 alkyl; andX is, independently at each occurrence, Cl, Br, or I.