Zwitterionic Polyamine in Water-Soluble Unit Dose
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Solution Overview
Problem
Water-soluble unit dose laundry detergent compositions face challenges in effectively removing particulate soil due to limited space for active formulation, particularly in low fatty acid/neutralized fatty acid soap formulations, where ethoxylated polyethyleneimines do not provide sufficient particulate soil removal.
Innovation Solution
Incorporating a zwitterionic polyamine in the detergent composition, within specific weight percentages, along with fatty acids or neutralized fatty acid soaps, to enhance particulate soil removal capabilities, while reducing the overall levels of fatty acids or neutralized fatty acid soaps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If ethoxylated polyethyleneimines are used in low fatty acid formulations, then the formulation space is optimized, but particulate soil removal is insufficient
Solution Approach 1:
The patent changes the chemical parameter of the polyamine component from ethoxylated polyethyleneimine to zwitterionic polyamine, which has different molecular structure and charge characteristics. This parameter change enables effective particulate soil removal at lower fatty acid concentrations, resolving the contradiction between reduced fatty acid content and maintained cleaning performance
Solution Approach 2:
The patent creates a composite detergent system combining zwitterionic polyamine with low levels of fatty acid/neutralized fatty acid soap. This composite formulation achieves synergistic effects where the zwitterionic polyamine provides particulate soil removal capability that complements the reduced fatty acid content, maintaining overall cleaning effectiveness
2Reliability
If zwitterionic polyamines are added to improve particulate soil removal, then cleaning performance increases, but formulation complexity increases
Solution Approach 1:
The zwitterionic polyamine serves multiple functions in the formulation: it provides particulate soil removal, works effectively with low fatty acid content, and maintains stability in the water-soluble unit dose format. This multi-functionality reduces the need for additional separate additives, thereby limiting the increase in formulation complexity while achieving improved 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 zwitterionic polyamines in the detergent composition significantly improves particulate soil removal compared to formulations with ethoxylated polyethyleneimines, demonstrating a higher stain removal index in wash tests, even in low fatty acid/neutralized fatty acid soap formulations.
Implementation Method 1
zwitterionic polyamines in low fatty acid/neutralized fatty acid soap formulations improved particulate soil removal
Implementation Method 2
Ethoxylated polyethyleneimines provide particulate soil removal from fabrics
Data Source
Figure 1
AI summary
The present disclosure is to a water-soluble unit dose article comprising a laundry detergent composition wherein the detergent contains a zwitterionic polyamine, and methods of using said unit dose article.