Catechol Disulfonamides for Liquid Detergent Stain Removal
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Solution Overview
Problem
Liquid detergents and cleaning agents often inadequately remove bleachable stains, particularly those containing polymerizable substances like polyphenolic dyes, due to the absence of bleaching agents, which can lead to intensification of soiling during the washing process.
Innovation Solution
Incorporating catechol disulfonamides into detergents and cleaning agents, specifically compounds of the general formula (I), which improve washing performance by stabilizing bleaching agents and enhancing the removal of bleachable stains without oxidative bleaching agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If bleaching agents are omitted from liquid detergents to ensure stability, then formulation stability is improved, but removal of bleachable stains deteriorates
Solution Approach 1:
The patent introduces catechol disulfonamides as intermediary substances that mediate between the stabilizing requirement and the stain removal function. These compounds complex with metal ions (particularly iron) to form stable complexes that prevent catalytic decomposition of peroxides while simultaneously enabling oxidation of stains, thus serving as both stabilizer and activator
Solution Approach 2:
The patent changes the chemical parameters of the detergent system by introducing catechol disulfonamides with specific molecular structures (formula I) that have optimal complexing constants with metal ions. This parameter change allows the system to maintain peroxide stability while preserving bleaching activity against stains
2Object-affected harmful factors
If bleaching agents are omitted to protect textile dyes from fading, then color protection is improved, but removal of polyphenolic stains deteriorates
Solution Approach 1:
Catechol disulfonamides act as intermediaries that enable selective oxidation. They complex with metal ions to create a controlled oxidation system that removes polyphenolic stains through chelation-assisted oxidation while being gentler on textile dyes compared to free peroxide decomposition
Solution Approach 2:
The patent converts the potential harm of metal ion-catalyzed peroxide decomposition into a benefit by using catechol disulfonamides to control this reaction. The metal ion complexing creates a controlled oxidation pathway that selectively targets stains while protecting dyes
3Device complexity
If washing is performed without bleaching agents, then formulation simplicity is improved, but intensification of soiling deteriorates
Solution Approach 1:
Catechol disulfonamides serve as intermediary agents that prevent the harmful polymerization reactions of polyphenolic substances during washing. By complexing with metal ions, they eliminate the catalytic effect that would otherwise cause stain intensification, while maintaining formulation simplicity
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
Significantly improves the removal of bleachable stains, including those from food products and drinks, by stabilizing bleaching agents and preventing the worsening of soiling during the washing process, as demonstrated by increased whiteness and stain removal efficiency.
Implementation Method 1
3,5-Disubstituted catecholsulfonamides and their complexing properties for iron were described by Schwert et al. in J. Med. Chem. 2005, 48, 7482-7485
Implementation Method 2
the removal of bleachable soils, which are normally at least partially removed by the peroxygen-based bleaching agent
Data Source
AI summary
The present invention relates to the use of disubstituted sulfonamides of catechol in detergents and cleaning agents for improving the washing or cleaning performance with respect to bleachable stains.