Automatic Dishwashing Composition for Bleach-Free Tea Stain Removal
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Solution Overview
Problem
Automatic dishwashing compositions without phosphate builders or bleaching compounds struggle with removing stubborn stains, particularly tea stains, due to reduced cleaning performance and stability issues with bleaches.
Innovation Solution
Incorporating a chelating agent such as hydroxyethyliminodiacetic acid, glucoheptonic acid, hydroxyethylethylenediaminetriacetic acid, or poly(acrylic acid-co-hypophosphite) in significant amounts to enhance the composition's ability to remove stubborn stains, while maintaining a reduced phosphorus content and improved biodegradability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If phosphate builders are removed from the composition, then environmental profile is improved, but cleaning performance deteriorates
Solution Approach 1:
The patent changes the chemical parameters by replacing phosphate builders with alternative builders (zeolites, citrates, polymeric builders) and adjusting their concentrations to achieve both environmental compliance and effective cleaning performance without phosphates
Solution Approach 2:
The patent uses composite builder systems combining multiple non-phosphate ingredients (zeolites, citrates, polymeric builders) to achieve the combined functionality of sequestration, soil suspension, alkalinity, and emulsification that phosphates previously provided alone
2Reliability
If bleaching compounds are added to remove stains, then cleaning performance improves, but stability and compatibility deteriorate
Solution Approach 1:
The patent extracts or removes bleaching compounds from the composition entirely, relying instead on enhanced chelating agents and optimized builder systems to achieve stain removal without the stability and compatibility problems associated with bleaches
3Loss of substance
If phosphate builders are removed from the composition, then biodegradability is improved, but cleaning performance deteriorates
Solution Approach 1:
The patent changes the chemical composition parameters to use biodegradable alternative builders (citrates, polymeric builders) that can be readily broken down, while adjusting formulation parameters to maintain cleaning effectiveness
Solution Approach 2:
The patent employs composite formulations combining multiple biodegradable ingredients that work synergistically to provide both environmental benefits and effective cleaning performance
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 use of these chelating agents significantly improves the removal of stubborn stains like tea stains, even in compositions without phosphate builders or bleaches, while ensuring environmental sustainability and effective cleaning performance.
Implementation Method 1
Automatic dishwashing composition comprising a chelating agent selected from hydroxyethyliminodiacetic acid, glucoheptonic acid, hydroxyethylethylenediaminetriacetic acid, poly(acrylic acid-co-hypophosphite), and salts, complexes and mixtures thereof
Data Source
AI summary
An automatic dishwashing composition offering good performance especially in the removal of stubborn stains, such as tea stains, comprises a chelating agent selected from hydroxyethyliminodiacetic acid, glucoheptonic acid, hydroxyethylethylenediaminetriacetic acid, poly(acrylic acid-co-hypophosphite), and salts, complexes and mixtures thereof; wherein the composition is substantially free of phosphate containing builders and substantially free of bleaching compounds.