Amine Oxide Surfactant in Water-Soluble Unit Dose Articles
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Solution Overview
Problem
Water-soluble unit dose articles with liquid detergent compositions face issues of premature rupture leading to spillage and contamination, and increasing viscosity with rheology modifiers compromises cleaning performance by reducing active ingredient levels.
Innovation Solution
Incorporating amine oxide as an amphoteric surfactant in the liquid detergent composition within a water-soluble unit dose article, which is packaged with a recloseable container and water-soluble film, reduces liquid leakage from ruptured units while maintaining effective cleaning performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the viscosity of the liquid detergent composition is increased to reduce leakage from ruptured unit dose articles, then liquid leakage is reduced, but cleaning performance deteriorates due to lower levels of cleaning actives
Solution Approach 1:
The patent changes the chemical composition parameters of the detergent by incorporating amine oxide surfactants, which alter the surface tension and rheological properties of the liquid detergent. This allows the detergent to maintain lower viscosity (preserving cleaning active levels) while achieving adequate compression resistance to prevent premature rupture and leakage.
Solution Approach 2:
The patent creates a composite detergent formulation combining multiple surfactant types including amine oxide compounds. This composite approach allows the detergent to achieve both low viscosity for cleaning performance and sufficient compression resistance through the synergistic effects of different surfactant molecules working together.
2Reliability
If rheology modifiers are added to increase viscosity and reduce leakage, then liquid leakage is reduced, but cleaning performance deteriorates due to reduced cleaning active levels
Solution Approach 1:
The patent extracts and eliminates the need for separate rheology modifiers from the detergent formulation. Instead of adding dedicated viscosity-control additives that would displace cleaning actives, the invention uses amine oxide surfactants that inherently provide both cleaning functionality and adequate compression resistance.
Solution Approach 2:
The amine oxide surfactants serve multiple functions simultaneously: they act as cleaning agents, provide compression resistance to prevent premature rupture, and eliminate the need for separate rheology modifiers. This multi-functionality resolves the contradiction by replacing a single-function additive with a multi-functional ingredient.
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 amine oxide in the detergent composition minimizes liquid leakage from prematurely ruptured unit dose articles while providing excellent grease cleaning benefits and maintaining cleaning performance.
Implementation Method 1
the liquid laundry detergent composition comprises a non-soap anionic surfactant and an amphoteric surfactant, wherein the amphoteric surfactant is amine oxide
Data Source
Figure 1
AI summary
The present invention relates to water-soluble unit dose articles comprising an amphoteric surfactant, methods of making and methods of use.