Storage-Stable Dye Salts Using Alkanolamines
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Solution Overview
Problem
Conventional dye compositions face stability issues during storage and transportation, leading to precipitation and disruptions in pumping systems, and they contribute to high water-treating costs due to high carbon content in effluents.
Innovation Solution
A storage-stable dye composition comprising a compound of formula (I) with a coupling component and an alkanolamine, such as triisopropanolamine or dimethylethanolamine, which maintains stability across a wide temperature range and reduces sedimentation and crystallization, thereby preventing disruptions and effluent issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional aqueous dye solutions are used, then dyeing function is provided, but storage stability deteriorates leading to precipitation during transportation and storage
Solution Approach 1:
The patent changes the chemical parameter by replacing conventional amine salts with alkanolamine salts (specifically triisopropanolamine or dimethylethanolamine). This parameter change in the salt structure fundamentally alters the storage stability characteristics, preventing precipitation across a wide temperature range from -20°C to 50°C without requiring additional solubilizers.
2Stability of the object's composition
If solubilizers are added to improve storage stability, then precipitation is prevented, but carbon content in effluents increases leading to high water-treating costs
Solution Approach 1:
The patent extracts and eliminates the need for additional solubilizers from the dye composition. By using alkanolamine salts intrinsically, the formulation removes the harmful solubilizer components that would otherwise increase carbon content in effluents and require expensive water treatment, while maintaining storage stability.
3Temperature
If frozen dye compositions are stored, then transportation is enabled, but stability problems occur during thawing and pumping
Solution Approach 1:
The patent changes the physical-chemical parameters of the dye composition through alkanolamine salt formation, which prevents crystallization and maintains stability during freezing and thawing cycles. This enables the dye to be stored frozen at -20°C and remain stable during subsequent thawing and pumping operations without precipitation or degradation.
Data Source
AI summary
The present invention relates to storage-stable dye salts, solutions and compositions thereof a process for their preparation and their use for dyeing and/or printing substrates.