Liquid Detergent Composition for Aminocarboxylate Dye Stability
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Solution Overview
Problem
Aminocarboxylate builders in detergent formulations, such as methylglycine-N,N-diacetic acid and L-glutamic acid-N,N-diacetic acid, cause instability in dyes, leading to uneven or mottled colors, which can be exacerbated by light transmission through transparent containers, affecting consumer perception and product trust.
Innovation Solution
Incorporating small amounts of polyalkyleneimines, specifically polyethyleneimine, into the detergent compositions to stabilize the dyes, maintaining color integrity even in aqueous formulations and transparent containers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If aminocarboxylate builders are used in detergent formulations, then cleaning performance is improved, but dye stability deteriorates
Solution Approach 1:
The patent introduces a mediator substance that is compatible with both aminocarboxylate builders and dyes to resolve their incompatibility. This mediator acts as a buffer or protective agent that prevents the aminocarboxylate from degrading the dye while maintaining the cleaning efficacy of the builder system.
Solution Approach 2:
The patent modifies formulation parameters such as pH control, ionic strength, or concentration ratios of components to create conditions where both aminocarboxylate builders and dyes can coexist stably. By adjusting these parameters, the harmful interaction between builder and dye is minimized while preserving cleaning performance.
2Ease of manufacture
If transparent containers are used for detergent products, then product visibility is improved, but dye degradation is accelerated
Solution Approach 1:
The patent applies preliminary protective measures to the dye formulation, such as adding light-stabilizing agents or encapsulating the dye in protective matrices before packaging. This preliminary protection allows the use of transparent containers while preventing light-induced degradation during storage and use.
Solution Approach 2:
The patent introduces intermediary substances such as UV absorbers, antioxidants, or encapsulating materials that act as a barrier between the dye and light. These intermediaries absorb or scatter harmful light wavelengths while allowing the container to remain transparent for product visibility.
3Adaptability or versatility
If aqueous formulations are used to incorporate difficult ingredients, then formulation versatility is improved, but dye stability worsens
Solution Approach 1:
The patent adjusts aqueous formulation parameters such as pH, ionic strength, and component concentrations to create a stable environment for both difficult-to-formulate ingredients and dyes. By optimizing these parameters, the patent enables versatile ingredient incorporation while maintaining dye stability in the aqueous system.
Solution Approach 2:
The patent creates composite aqueous formulations that combine multiple stabilizing agents, surfactants, and builders in specific ratios. This composite approach allows difficult ingredients to be incorporated while the combined system provides enhanced stability protection for the dye against degradation.
Data Source
AI summary
The invention relates to a colour stable liquid or gel detergent composition comprising an aminocarboxylate builder, a dye and a polyalkyleneimine.