Dishwashing Detergent Composition for Low-Temperature Tea Stain Removal
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Solution Overview
Problem
Modern dishwashing detergents, particularly for dishwashers, struggle to effectively remove bleachable stains like tea stains, especially at lower cleaning temperatures and with reduced water consumption.
Innovation Solution
A dishwashing detergent composition comprising a hydrogen peroxide source, a bleaching catalyst selected from manganese complexes with 1,4,7-trimethyl-1,4,7-triazacyclononane (Me-TACN) or 1,2,4,7-tetramethyl-1,4,7-triazacyclononane (Me/Me-TACN), and a protease with an amino acid sequence identical to SEQ ID NO. 3, synergistically enhances cleaning performance on bleachable soils, particularly tea stains, even at low temperatures and short wash cycles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional bleaching systems are used in dishwashing detergents, then general cleaning performance is maintained, but effective removal of bleachable stains like tea stains is insufficient
Solution Approach 1:
The patent combines multiple components into a composite bleaching system: manganese catalyst (Me-TACN or Me/Me-TACN), protease enzyme with specific amino acid sequence (SEQ ID NO. 3), and hydrogen peroxide source (sodium percarbonate). This composite approach creates synergistic effects that dramatically improve tea stain removal compared to conventional single-component bleaching systems, while maintaining compatibility with standard dishwasher operations.
Solution Approach 2:
The invention optimizes specific parameters of the bleaching system: using manganese in specific coordination complexes (Me-TACN or Me/Me-TACN) rather than conventional bleach agents, selecting a specific protease with defined amino acid sequence, and controlling the hydrogen peroxide source (sodium percarbonate). These parameter changes enable effective low-temperature bleaching and enhance tea stain removal performance.
2Reliability
If higher temperatures are used for washing, then cleaning performance improves, but energy consumption and water heating requirements increase
Solution Approach 1:
The patent changes the chemical parameters of the cleaning system by introducing manganese catalysts (Me-TACN or Me/Me-TACN) and specific proteases that are optimized for low-temperature activity. This enables effective cleaning and bleaching performance at reduced temperatures, directly addressing energy conservation goals while maintaining cleaning effectiveness.
Solution Approach 2:
The invention replaces thermal energy (heat) with chemical energy (catalyst-enzyme systems) to achieve cleaning and bleaching effects. The manganese catalysts and proteases provide chemical mechanisms that facilitate stain removal and bleaching at lower temperatures, substituting the need for high thermal input while maintaining or improving cleaning performance.
3Reliability
If longer wash cycles are used, then cleaning performance improves, but productivity and time efficiency decrease
Solution Approach 1:
The patent incorporates protease enzyme that begins protein breakdown during the wash cycle, and manganese catalysts that activate bleaching agents. This preliminary chemical action on stains (particularly protein-based tea stains) prepares the soiling for easier removal during the main wash, enabling effective cleaning in shorter cycles by pre-treating stains in-situ during the wash process.
Solution Approach 2:
The manganese catalysts and proteases provide continuous cleaning action throughout the wash cycle. The catalysts continuously activate bleaching agents, and the protease continuously breaks down protein soils, ensuring that cleaning performance is maintained throughout the entire cycle rather than requiring extended periods for gradual effect. This continuous action enables shorter effective wash cycles.
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 composition exhibits very good bleaching and cleaning performance on bleachable soils, including tea stains, with improved rinsing performance and effectiveness at low temperatures and short wash cycles, demonstrating a synergistic interaction between the protease and bleaching catalyst.
Implementation Method 1
a hydrogen peroxide source, a bleaching catalyst... the composition exhibits very good bleaching and cleaning performance on bleachable soils
Implementation Method 2
a bleaching catalyst selected from manganese complexes with 1,4,7-trimethyl-1,4,7-triazacyclononane (Me-TACN) or 1,2,4,7-tetramethyl-1,4,7-triazacyclononane (Me/Me-TACN)
Implementation Method 3
a protease with an amino acid sequence identical to SEQ ID NO. 3... synergistically enhances cleaning performance on bleachable soils, particularly tea stains
Data Source
AI summary
In a dishwashing liquid, the cleaning performance, in particular on bleachable stains such as, for example, tea stains, is to be improved. This succeeds using a dishwashing liquid which comprises a hydrogen peroxide source, a bleaching catalyst and a protease that, in native electrophoresis on a polyacrylamide gel, has a migration distance that is longer than the migration distance of the protease as per SEQ ID NO. 1.