Alkaline Mild Cleansing Composition with Amino Acid Surfactants
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Solution Overview
Problem
Formulating personal cleansing compositions that are both mild and effective antibacterials is challenging, as mild surfactants often compromise antibacterial efficacy, and high pH levels are typically associated with harshness rather than gentleness.
Innovation Solution
A cleansing composition comprising non-soap surfactants like alkyl glycinate, alkyl carboxy glycinate, sarcosinate, or glutamate, combined with antimicrobial agents such as thymol and terpineol, with a pH of at least 8.5 and minimal soap content, to achieve both mildness and rapid antibacterial action.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If very mild non-soap surfactants are used, then skin mildness is improved, but antibacterial effectiveness is compromised
Solution Approach 1:
The patent changes the pH parameter from the conventional neutral range (pH 5-7) to an alkaline range (pH 8.5-10.5), which enables very mild surfactants to exhibit effective antibacterial activity. This parameter change resolves the contradiction by allowing the same mild surfactants to provide both skin gentleness and antibacterial effectiveness under different pH conditions.
Solution Approach 2:
The patent combines very mild surfactants (such as alkyl polyglucosides or amino acid-based surfactants) with alkaline agents (such as sodium carbonate, potassium carbonate, or triethanolamine) to create a composite cleansing composition. This composite approach allows the mild surfactants to maintain their gentleness while the alkaline environment enhances their antibacterial properties.
2Reliability
If high pH levels are used, then antibacterial effectiveness is improved, but skin mildness deteriorates
Solution Approach 1:
The patent optimizes the pH parameter to a specific alkaline range (pH 8.5-10.5) that is high enough to provide effective antibacterial activity but controlled to avoid excessive harshness. This precise parameter control allows the composition to achieve strong antibacterial effects while maintaining acceptable skin mildness.
Solution Approach 2:
The patent uses very mild surfactants with specific molecular structures (such as alkyl polyglucosides with C12-C18 alkyl chains) that provide localized gentleness at the skin interface even in an alkaline environment. The surfactant structure is designed to be gentle on skin while the overall composition pH provides antibacterial effectiveness.
3Reliability
If conventional soap is used, then antibacterial effectiveness is improved, but skin mildness deteriorates
Solution Approach 1:
The patent extracts and eliminates the harsh components of conventional soap (such as high molecular weight fatty acid salts that cause skin dryness and irritation) while retaining the beneficial alkaline pH and antibacterial properties. The composition uses alternative surfactant systems that provide gentleness without compromising antibacterial effectiveness.
Solution Approach 2:
The patent replaces durable but harsh conventional soap with milder surfactant systems that may require more frequent replenishment but provide gentler skin care. The composition uses readily biodegradable surfactants that are gentle on skin while maintaining effective antibacterial activity.
Data Source
AI summary
Disclosed is a cleansing composition comprising: (i) a non-soap surfactant which is an alkyi glycinate, alkyi carboxy glycinate, sarcosinate, glutamate or a mixture thereof; and, (ii) one or more antimicrobial agent, wherein pH of said composition is at least 8.5 and zein number of said composition is in the range of 10 to 65 and wherein soap content of said composition is not greater than 5 wt%. The formulation is highly alkaline, yet gives mild antibacterial cleansing action.