Dishwashing Detergent Pouch Chemistry for Tea Stain Removal
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Solution Overview
Problem
Existing automatic dishwashing detergent pouches struggle with inadequate cleaning performance, particularly against tough tea stains.
Innovation Solution
A water-soluble automatic dishwashing detergent pouch containing dipicolinic acid and/or its salt, a transition metal bleach catalyst, a bleach activator (TAED), and a source of peroxygen, such as sodium percarbonate, to enhance cleaning efficacy against tea stains.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional detergent formulations are used, then the detergent pouch provides basic cleaning function, but cleaning performance against tea stains is insufficient
Solution Approach 1:
The patent combines multiple cleaning agents (dipicolinic acid, transition metal bleach catalyst, TAED bleach activator, and peroxygen source) into a single synergistic detergent formulation. This merging of different chemical systems creates enhanced cleaning performance against tea stains while maintaining a unified pouch structure, resolving the contradiction between improved reliability and increased complexity.
Solution Approach 2:
The detergent composition uses a composite chemical system where dipicolinic acid works synergistically with transition metal bleach catalysts (such as manganese complexes), TAED, and sodium percarbonate. This composite approach allows each component to contribute specific functions while collectively achieving superior stain removal, particularly for difficult tea stains, without requiring overly complex formulation structures.
2Reliability
If the detergent pouch uses simple formulation, then manufacturing is easier, but cleaning efficacy against tough stains is inadequate
Solution Approach 1:
The patent optimizes specific parameters of the detergent components, including the concentration ranges of dipicolinic acid (0.1-5.0%), transition metal bleach catalyst (0.01-0.5%), TAED (0.2-5.0%), and sodium percarbonate (5-20%). By carefully controlling these parameters within defined ranges, the formulation achieves high cleaning efficacy while maintaining manufacturability through standardized ingredient specifications.
3Reliability
If conventional bleach systems are used, then the detergent provides general cleaning, but synergistic cleaning performance against tea stains is not achieved
Solution Approach 1:
The patent employs a accelerated bleach system combining transition metal bleach catalysts (particularly dinuclear manganese complexes), TAED as a bleach activator, and sodium percarbonate as a peroxygen source. This system generates highly reactive oxygen species that provide strong oxidizing power specifically effective against tea stains, achieving synergistic cleaning performance through the coordinated action of these chemical components.
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 combination provides synergistic cleaning performance, effectively removing tea stains and improving overall cleaning efficiency.
Implementation Method 1
transition metal bleach catalyst that is a dinuclear manganese-complex having the general formula: wherein Mn is manganese which can individually be in the III or IV oxidation state
Implementation Method 2
a source of peroxygen that is sodium percarbonate... combination of dipicolinic acid and/or salt thereof and a transition metal bleach catalyst in the presence of a bleach activator and source of peroxygen provides synergistic cleaning performance against tea stains
Implementation Method 3
greater than 0.2 wt. % bleach activator that is tetraacetylethylenediamine (TAED)... combination of dipicolinic acid and/or salt thereof and a transition metal bleach catalyst in the presence of a bleach activator and source of peroxygen provides synergistic cleaning performance against tea stains
Implementation Method 4
the automatic dishwashing detergent composition comprises: (a) dipicolinic acid and/or salt thereof... combination of dipicolinic acid and/or salt thereof and a transition metal bleach catalyst provides synergistic cleaning performance against tea stains
Implementation Method 5
a source of peroxygen that is sodium percarbonate... combination of dipicolinic acid and/or salt thereof and a transition metal bleach catalyst in the presence of a bleach activator and source of peroxygen provides synergistic cleaning performance against tea stains
Data Source
AI summary
A water-soluble automatic dishwashing detergent pouch includes an automatic dishwashing detergent composition that is enclosed by a water-soluble film. The automatic dishwashing detergent composition includes dipicolinic acid and/or salt thereof; transition metal bleach catalyst that is a dinuclear manganese-complex, greater than about 0.2 wt. % bleach activator that is tetraacetylethylenediamine (TAED); and a source of peroxygen that is sodium percarbonate.