Metal Complexes for Burnt-In Soiling Removal
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Solution Overview
Problem
Current automatic dishwashing detergents are inadequate in removing burnt-in soiling, which occurs when cooking with proteins and starches at high temperatures, leading to consumer dissatisfaction due to insufficient cleaning performance.
Innovation Solution
The use of metal complexes with specific heterocyclic ligands, such as those represented by the general formula (I) and (III), which include sulfo or sulfato or thioalkyl substituents, enhances cleaning performance by forming effective cleaning agents for automatic dishwashers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional dishwashing detergents are used, then general cleaning performance is maintained, but cleaning performance on burnt-in soiling remains insufficient
Solution Approach 1:
The patent modifies the chemical structure of cyclic ligands by introducing specific substituents (sulfo, sulfato, thioalkyl groups at positions 3 and 7) to change the properties of the metal complex. This structural parameter change enables the detergent to effectively remove burnt-in soiling while maintaining overall cleaning performance.
Solution Approach 2:
The invention uses composite metal complexes formed by combining specific cyclic ligands with metal ions (such as Ga3+, In3+, Sc3+, Y3+, or their mixtures). These composite materials provide enhanced cleaning performance on burnt-in soiling compared to conventional single-component detergents.
2Reliability
If metal complexes with specific heterocyclic ligands are used, then cleaning performance on burnt-in soiling is improved, but detergent formulation complexity increases
Solution Approach 1:
The patent introduces specific functional groups (sulfo, sulfato, thioalkyl) at particular positions (3 and 7) of the cyclic ligand structure. This localized modification provides the necessary cleaning enhancement for burnt-in soiling while keeping the rest of the detergent formulation relatively simple and manageable.
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
These metal complexes significantly improve the removal of burnt-in soiling, providing better cleaning performance and addressing the limitations of existing detergents, as demonstrated by their ability to break down protein-based stains effectively.
Implementation Method 1
metal complexes with certain heterocyclic ligands, which have sulfo or sulfato or thioalkyl substituents on the hetero atom
Implementation Method 2
bring about improved cleaning performance on burnt-in soiling when used in dishwashers
Data Source
AI summary
The invention relates to compounds of general formula (I),in which each E independently represents O or NR1, with the proviso that at least 1 E is not O and at least 1 R1 represents a substituted C1-22 alkyl of the general formula (IIa) or (IIb) or (IIIa) or (IIIb),in which Q represents O or CH2, w represents a number from 1 to 22, q represents 1 or 2 and A+ represents a cation selected from alkali metal cations where q=1, ½ alkaline earth cations where q=2 and ammonium ions where q=1, as well as metal complexes having this ligand compound and dishwashing detergents which contain such metal complexes.