Antimicrobial Liquid Detergent Composition with Low Alkoxylation Surfactants
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Solution Overview
Problem
Liquid hand dishwashing compositions with lactic acid face challenges in achieving improved antimicrobial efficacy while maintaining physical stability, especially at low temperatures, due to the use of linear alkyl sulfate anionic surfactants with low alkoxylation.
Innovation Solution
A liquid hand dishwashing composition comprising 5-50% of a surfactant system with at least 50% alkyl sulfated anionic surfactants having an average degree of alkoxylation of 1.0 or less and an alkyl polyglucoside surfactant, along with lactic acid, at a pH of less than 5.0, which enhances foaming, grease cleaning, and antimicrobial efficacy while maintaining stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If linear alkyl sulfate anionic surfactants with low degree of alkoxylation are used to improve antimicrobial efficacy, then antimicrobial efficacy is improved, but physical stability at low temperatures deteriorates
Solution Approach 1:
The patent modifies the degree of alkoxylation parameter of the anionic surfactant to 1.0 or less, and adjusts the surfactant system composition to include both anionic and nonionic surfactants in specific ratios, thereby achieving improved antimicrobial efficacy while maintaining physical stability through parameter optimization
Solution Approach 2:
The patent creates a composite surfactant system combining anionic surfactants (linear alkyl sulfate with low alkoxylation) and nonionic surfactants (alkyl polyglucoside), where the composite formulation synergistically provides both antimicrobial efficacy and physical stability that neither component achieves alone
2Reliability
If linear alkyl sulfate anionic surfactants with low degree of alkoxylation are used to improve antimicrobial efficacy, then antimicrobial efficacy is improved, but foaming and cleaning performance deteriorate
Solution Approach 1:
The patent optimizes the degree of alkoxylation to 1.0 or less and adjusts the concentration ratios of anionic to nonionic surfactants, thereby achieving improved antimicrobial efficacy while maintaining foaming and cleaning performance through parameter optimization
Solution Approach 2:
The patent formulates a composite surfactant system where anionic surfactants provide antimicrobial efficacy and nonionic surfactants contribute to foaming and cleaning performance, with the composite providing synergistic effects that satisfy all performance requirements simultaneously
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 robust antimicrobial efficacy and physical stability at low temperatures, ensuring effective cleaning and foaming performance.
Implementation Method 1
The lactic acid exhibits antimicrobial efficacy while being suitable for use in liquid hand dishwashing compositions, when used in compositions having an acidic pH
Implementation Method 2
effective foaming and rinsing of the foam is important for consumers. To provide good foaming and cleaning benefits, formulators of hand dishwashing detergent compositions have traditionally formulated with anionic surfactants
Data Source
AI summary
A liquid hand dishwashing detergent composition includes from about 5% to about 50% by weight of the total composition of a surfactant system. The surfactant system includes anionic surfactant having at least about 50% by weight of the anionic surfactant of alkyl sulfated anionic surfactant. The alkyl sulfated anionic surfactant has an average degree of alkoxylation of about 1.0 or less, and the alkyl sulfated anionic surfactant has a weight average degree of branching of at least about 15%. The surfactant system further includes an alkyl polyglucoside surfactant. The composition further includes a carboxylic acid and/or a salt thereof; and the composition has a pH of less than about 5.0, measured as an about 10% solution in demineralized water at about 20° C.