Phosphate-Free Dishwasher Agent for Bleachable Stain Removal
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Solution Overview
Problem
Automatic dishwashing agents often fail to effectively remove bleachable stains, such as tea residues, from light-colored ceramics, and existing bleaching agents with bleach activators and catalysts are costly and environmentally harmful, while bleach-free detergents lack satisfactory cleaning performance.
Innovation Solution
A phosphate-free automatic dishwashing agent formulated with at least one bleaching agent and two builders, specifically oxygen bleaching agents like sodium percarbonate, and builders like silicates and citric acid, which are combined to enhance cleaning performance on bleachable stains without using nonionic surfactants, bleach activators, or bleach catalysts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bleaching agents with bleach activators and catalysts are used, then cleaning performance on bleachable stains is improved, but cost increases and environmental harm worsens
Solution Approach 1:
The invention extracts and removes the harmful components (bleach activators and bleach catalysts) from the cleaning system while retaining the essential bleaching function through the use of persalts alone, thereby reducing environmental pollution while maintaining cleaning performance
Solution Approach 2:
The invention changes the chemical parameters by using alternative persalt compounds (sodium percarboxylates, potassium percarboxylates, calcium percarboxylates, or mixtures thereof) with specific peroxide content ranges (5-80% by weight) to achieve effective bleaching without requiring activators or catalysts, thus resolving the environmental harm issue
2Reliability
If bleaching agents with bleach activators and catalysts are used, then cleaning performance on bleachable stains is improved, but manufacturing cost increases
Solution Approach 1:
The invention extracts and eliminates the expensive components (bleach activators and bleach catalysts) from the formulation, using only persalts which are more cost-effective, thereby reducing manufacturing cost while maintaining cleaning efficacy through optimized persalt selection and concentration
Solution Approach 2:
The invention employs inexpensive persalt compounds that can be used directly without requiring additional expensive chemical systems (activators and catalysts), making the cleaning agent more affordable while maintaining effective bleaching performance through proper formulation
3Object-generated harmful factors
If bleach-free detergents are used, then environmental impact is reduced, but cleaning performance on bleachable stains deteriorates
Solution Approach 1:
The invention changes the chemical formulation by using persalts with optimized peroxide content (5-80% by weight) and specific composition ratios, enabling effective bleaching action without requiring additional chemical systems, thus achieving both environmental friendliness and satisfactory cleaning performance on bleachable stains
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 agent provides improved cleaning performance on bleachable stains, reducing environmental impact and resource usage by eliminating the need for costly bleach activators and catalysts, while ensuring spotless dishwashing without additional manual effort.
Implementation Method 1
containing at least one bleaching agent... oxygen bleaching agents like sodium percarbonate
Data Source
AI summary
The present invention relates to a phosphate-free agent for machine dishwashing, which does not contain a nonionic surfactant, comprising at least one bleaching agent and at least one first builder and at least one second builder. Furthermore, a method for producing this agent and a method for removing bleachable soils are also part of the invention. The invention also relates to the use of at least one first builder and at least one second builder together with a bleaching agent for removing bleachable soils.