Alkyl Sulfate and Polyglucoside Surfactant System for Viscosity Stability
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Solution Overview
Problem
Hand dishwashing compositions face challenges in maintaining a consistent Newtonian viscosity and effective grease removal while providing long-lasting suds, as they are often sensitive to changes in surfactant and solvent levels, leading to variations in cleaning performance.
Innovation Solution
A liquid hand dishwashing composition is formulated with a surfactant system comprising at least 40% anionic surfactant, primarily alkyl sulfate anionic surfactant with a high degree of branching and little or no alkoxylation, combined with an alkyl polyglucoside surfactant, which stabilizes viscosity and enhances suds mileage and grease removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-generated harmful factors
If alkyl sulfate anionic surfactant with low degree of alkoxylation is used, then grease cleaning performance is improved, but suds mileage is reduced
Solution Approach 1:
The patent combines alkyl sulfate anionic surfactant with low degree of alkoxylation (0-0.5) and alkyl polyglucoside nonionic surfactant in a composite surfactant system. This composite approach allows the anionic surfactant to provide excellent grease cleaning performance while the nonionic surfactant compensates for the reduced suds mileage, achieving both cleaning effectiveness and sustained foaming throughout the dishwashing process.
2Object-generated harmful factors
If surfactant or solvent levels are adjusted to optimize cleaning performance or sudsing profile, then cleaning performance is improved, but viscosity changes occur
Solution Approach 1:
The patent specifies precise parameter ranges for the surfactant components: alkyl sulfate anionic surfactant with alkoxylation degree of 0-0.5 and alkyl polyglucoside nonionic surfactant with specific chain lengths (C8-C16). By controlling these parameters within defined ranges, the formulation maintains optimal viscosity stability while allowing adjustments in surfactant levels to optimize cleaning performance and sudsing characteristics.
3Ease of operation
If viscosity is increased to provide 'richness' and consistent user experience, then user experience is improved, but sensitivity to surfactant and solvent level changes increases
Solution Approach 1:
The alkyl polyglucoside nonionic surfactant acts as an intermediary component that buffers the viscosity against changes in surfactant and solvent levels. This mediator substance provides viscosity stability and reduces the overall formulation's sensitivity to compositional variations, ensuring consistent user experience across different batches and usage conditions.
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 composition achieves a consistent Newtonian viscosity, improved suds mileage, and enhanced grease removal performance, reducing sensitivity to surfactant and solvent level changes, resulting in a more stable and effective cleaning experience.
Implementation Method 1
the surfactant system comprises at least 40% by weight of the surfactant system of anionic surfactant, wherein the anionic surfactant comprises at least 50% by weight of the anionic surfactant of alkyl sulfate anionic surfactant
Data Source
AI summary
The need for a hand-dishwashing composition which is highly effective at removing grease, providing long-lasting suds under soiled conditions, while having a Newtonian viscosity which is less sensitive to changes on surfactant and solvent levels, is met by formulating the liquid hand dishwashing cleaning composition to comprise a surfactant system having a combination of alkyl sulphate anionic surfactant having little or no alkoxylation and an alkyl polyglucoside surfactant.