Liquid Dishwashing Composition Grease Emulsification
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Solution Overview
Problem
Existing hand dishwashing compositions face challenges in effectively emulsifying grease, especially under diluted conditions, leading to poor grease removal and redeposition on dishes during in-sink dishwashing.
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 an alkyl chain of 8-18 carbon atoms and an average degree of alkoxylation less than 3.5, combined with a co-surfactant comprising at least 70% betaine surfactant and polypropyleneglycol with a weight average molecular weight of 500 g/mol to 1800 g/mol.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If hand-dishwashing composition is diluted into a sink filled with water, then the composition can be used in in-sink dishwashing processes, but grease emulsification becomes poor and greasy soils remain challenging to remove
Solution Approach 1:
The patent modifies the surfactant system parameters by incorporating specific ratios of anionic surfactants (alkyl sulfates with controlled alkoxylation), nonionic surfactants (alkyl polyglucosides), and amphoteric surfactants (betaines). This parameter optimization enables the composition to maintain effective grease emulsification even when diluted in sink water, resolving the contradiction between ease of in-sink operation and reliable grease removal.
Solution Approach 2:
The patent creates a composite surfactant system combining multiple surfactant types with complementary properties: anionic surfactants for grease emulsification, nonionic surfactants for stability, and amphoteric surfactants for enhanced cleaning. This composite approach allows the composition to maintain effectiveness under diluted conditions while providing reliable grease removal in in-sink dishwashing.
2Ease of operation
If hand-dishwashing composition is diluted into sink water, then the composition can be applied in practical dishwashing scenarios, but redeposition of greasy soils onto plates occurs
Solution Approach 1:
The patent optimizes the chemical parameters of the surfactant system, specifically the ratios and types of surfactants used. This parameter adjustment enhances the composition's ability to prevent grease redeposition during diluted in-sink dishwashing, allowing practical application while eliminating the harmful redeposition effect.
Solution Approach 2:
The patent introduces amphoteric surfactants (betaines) as intermediary agents that bridge the anionic and nonionic surfactant systems. These intermediary surfactants enhance the overall system's ability to prevent grease redeposition while maintaining compatibility with diluted sink water conditions, enabling practical dishwashing without harmful effects.
3Ease of manufacture
If traditional surfactant systems are used, then the composition is simple to formulate, but grease removal effectiveness is insufficient under diluted conditions
Solution Approach 1:
The patent develops a composite surfactant system combining anionic, nonionic, and amphoteric surfactants in specific ratios. This composite formulation maintains relative simplicity in manufacturing while significantly improving grease removal effectiveness under diluted conditions, resolving the contradiction between ease of manufacture and reliable performance.
Solution Approach 2:
The patent optimizes formulation parameters by establishing specific concentration ranges for each surfactant type: anionic surfactants (30-70%), nonionic surfactants (10-40%), and amphoteric surfactants (5-20%). These parameter adjustments enable effective grease removal under diluted conditions while keeping the formulation process straightforward and manufacturable.
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 improved grease emulsification and suds mileage, maintaining effective cleaning performance even under diluted conditions, reducing redeposition of greasy soils on dishes.
Implementation Method 1
a surfactant system, wherein 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
Implementation Method 2
from 0.1% to 10% by weight of the total composition of polypropyleneglycol, wherein the polypropyleneglycol has a weight average molecular weight from 500 g/mol to 1800 g/mol
Data Source
AI summary
The need for a hand-dishwashing composition which is highly effective at emulsifying grease is met by formulating the liquid hand dishwashing cleaning composition to comprise a surfactant system having a combination of alkyl sulphate anionic surfactant and a co-surfactant comprising at least 70% by weight of the co-surfactant of a betaine, in combination with a polypropyleneglycol having a weight average molecular weight from 500 g/mol to 1800 g/mol.