Concentrated Disazo Dye Formulation for Precipitation-Free Handling
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Solution Overview
Problem
Conventional aqueous dye solutions for industrial dyeing and printing are prone to precipitation during storage and transportation, causing disruptions in metering and pumping systems, and require costly dissolving operations, which affects their stability and usability.
Innovation Solution
Development of concentrated aqueous solutions of an anionic disazo dye, comprising salts, the free acid of the dye, 2-(2-butoxyethoxy)ethanol, and optional water-soluble organic solubilizers and biocides, which are stable over a wide temperature range and remain homogeneous upon dilution, ensuring stability and ease of use in dyeing and printing processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional aqueous dye solutions are used for industrial dyeing and printing, then the dyeing and printing processes can be carried out, but the solutions are prone to precipitation during storage and transportation, causing disruptions in metering and pumping systems
Solution Approach 1:
The patent introduces 2-(2-butoxyethoxy)ethanol as an intermediary substance to mediate between the dye and water. This intermediary prevents precipitation by forming a stable complex with the dye molecules, ensuring both storage stability and operational reliability without requiring system modifications
Solution Approach 2:
The patent changes the chemical composition parameters of the aqueous solution by adding specific additives (2-(2-butoxyethoxy)ethanol and water-soluble organic solubilizers). This parameter change transforms the solution from a precipitation-prone state to a stable state that resists precipitation across varying temperatures and storage conditions
2Ease of manufacture
If pulverulent dyes are used for industrial dyeing and printing, then the dyeing and printing processes can be carried out, but costly dissolving operations are required
Solution Approach 1:
The patent applies preliminary action by pre-dissolving the dye in 2-(2-butoxyethoxy)ethanol and water-soluble organic solubilizers during the manufacturing process to create a concentrated stable solution. This preliminary dissolution eliminates the need for time-consuming dissolving operations at the application site, as the dye is already in solution form ready for direct use
Solution Approach 2:
The patent replaces the expensive and time-consuming dissolving operation with a simpler mixing process. The concentrated dye solution can be directly diluted with water at the application site, eliminating the need for heating, stirring, and monitoring dissolving processes, thereby reducing both time and operational costs
3Ease of operation
If concentrated aqueous dye solutions are used to eliminate dissolving operations, then the ease of operation is improved, but the solutions may precipitate during storage and transportation
Solution Approach 1:
The patent creates a composite aqueous solution system combining dye, 2-(2-butoxyethoxy)ethanol, and water-soluble organic solubilizers. This composite formulation leverages the synergistic effects of the components to maintain homogeneity and prevent precipitation, achieving both ease of operation and compositional stability
Solution Approach 2:
The 2-(2-butoxyethoxy)ethanol acts as a mediating substance that prevents phase separation and precipitation in the concentrated dye solution. It maintains the homogeneity of the solution during storage and transportation while allowing the solution to remain concentrated and ready for use
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 solutions exhibit excellent storage stability, low viscosity, and remain stable after freezing and thawing, preventing precipitation and ensuring seamless operation in metering and pumping systems, while also being suitable for various printing and dyeing applications.
Implementation Method 1
concentrated aqueous solutions of an anionic disazo dye, comprising salts and or the free acid of the anionic dye and 2-(2-butoxyethoxy)ethanol
Implementation Method 2
Solutions containing precipitates can cause disruptions in pumping or metering systems... The solutions exhibit excellent storage stability, low viscosity, and remain stable after freezing and thawing
Data Source
AI summary
The present invention concerns concentrated aqueous solutions of an anionic disazo dye, comprising salts and or the free acids of the anionic dye of the formula (I)and 2-(2-butoxyethoxy)ethanol and the use of these solutions for dyeing and/or printing hydroxyl-containing substrates and for producing inkjet inks.