Liquid Dishwashing Composition Sudsing Stabilization
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Solution Overview
Problem
Existing liquid hand dishwashing compositions face challenges in maintaining suds volume and longevity, especially in the presence of greasy and particulate soils, leading to premature replenishment and reduced cleaning efficacy.
Innovation Solution
A liquid hand dishwashing composition comprising 5-50% surfactant system, 0.05-5.0% polyvinyl alcohol with specific viscosity, and a process where polyvinyl alcohol is added to an aqueous medium before the surfactant system, enhancing sudsing volume and longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of stationary object
If methods of formulating to improve suds mileage in the presence of greasy soils are used, then suds longevity is improved, but suds mileage is reduced in the presence of particulate soils
Solution Approach 1:
The patent modifies the chemical parameters of the surfactant system by incorporating specific co-surfactants (amine oxides, betaines, or alkyl polyglucosides) in controlled amounts (0.1-10% w/w) to balance the formulation's performance across different soil types, achieving both improved suds longevity with greasy soils and maintained suds mileage with particulate soils
Solution Approach 2:
The patent creates a composite surfactant system combining multiple surfactant types (anionic surfactants as the base with additional co-surfactants) to achieve synergistic effects that simultaneously improve suds longevity and maintain suds mileage under varying soil conditions
2Reliability
If high levels of both greasy and particulate soils are present in the dish-washing liquor, then cleaning demand increases, but suds volume and longevity deteriorate
Solution Approach 1:
The patent adjusts the surfactant concentration and composition parameters, specifically incorporating co-surfactants at optimized levels (0.1-10% w/w of total surfactant) to enhance the formulation's ability to maintain suds stability and volume even when high levels of both greasy and particulate soils are present
Solution Approach 2:
The patent introduces co-surfactants as intermediary substances that mediate between the surfactant system and the complex soil mixture, helping to maintain suds stability and cleaning efficacy in the presence of high levels of both greasy and particulate soils
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 provides improved sudsing volume and longevity, maintaining effective cleaning performance throughout the dishwashing process, even with greasy and particulate soils, reducing unnecessary replenishment and ensuring sustained cleaning efficacy.
Implementation Method 1
the polyvinyl alcohol stabilises the suds and hence improves suds mileage
Implementation Method 2
the polyvinyl alcohol has a viscosity of from 20 mPa.s to 55 mPa.s, when measured as a 4 % aqueous solution
Data Source
AI summary
The need for a liquid hand-dishwashing composition which provides further improved sudsing volume and longevity when washing dishware using diluted liquid hand dishwashing compositions, especially in the presence of greasy soil and particulate soil, while still providing the desired cleaning, is met when the composition is formulated with from 5% to 50% of a sudsing surfactant system and polyvinyl alcohol having a viscosity of from 20 mPa.s to 55 mPa.s.