Ratio-Controlled Antibacterial Cleansing Composition for Skin Compatibility
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Solution Overview
Problem
There is a need for an antibacterial cleansing composition that effectively reduces bacteria on the skin, particularly Staphylococcus aureus, while maintaining consumer acceptability in terms of viscosity and delivery of actives, and providing a natural skin barrier reinforcement.
Innovation Solution
An antibacterial cleansing composition comprising chloroxylenol, sodium lauryl sulfate, and a co-surfactant with a specific weight ratio ranging from 3:1 to 5:1, preferably 7.5:2.5 to 8:2, and a pH of 2 to 5, which includes optional ingredients like pyrrolidone carboxylic acid to enhance antibacterial efficacy and skin barrier maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional antimicrobial soaps are used, then antibacterial efficacy is achieved, but consumer acceptability in terms of viscosity and skin feel deteriorates
Solution Approach 1:
The patent applies parameter changes by optimizing the weight ratio of sodium lauryl sulfate to co-surfactant (specifically cocamidopropyl betaine) within the range of 3:1 to 5:1, and controlling pH between 2-5. This resolves the contradiction by adjusting formulation parameters to achieve both high antibacterial efficacy (99% reduction) and consumer-acceptable viscosity (3,000-25,000 cps) and skin compatibility.
Solution Approach 2:
The patent uses composite materials by combining sodium lauryl sulfate with co-surfactants (cocamidopropyl betaine, zwitterionic surfactants, amphoteric surfactants, or nonionic surfactants) in specific ratios. This composite approach enables the formulation to simultaneously achieve effective bacterial reduction, appropriate viscosity for consumer use, and mildness to skin, thereby resolving the contradiction between efficacy and acceptability.
2Reliability
If high concentration of antibacterial actives is used, then germ reduction efficacy is improved, but delivery to skin and consumer acceptability deteriorates
Solution Approach 1:
The patent optimizes the concentration of chloroxylenol (0.01-1% by weight) and adjusts the surfactant system parameters (weight ratio 3:1 to 5:1, pH 2-5) to achieve effective delivery of antibacterial actives to the skin. This parameter optimization ensures 99% bacterial reduction while maintaining consumer-acceptable viscosity and skin feel, resolving the contradiction between high efficacy and effective delivery.
3Stability of the object's composition
If viscosity is increased for consumer acceptability, then product stability is improved, but delivery of actives to skin deteriorates
Solution Approach 1:
The patent precisely controls the weight ratio of sodium lauryl sulfate to co-surfactant (3:1 to 5:1) and pH (2-5) to achieve the optimal viscosity range of 3,000-25,000 cps. This parameter control resolves the contradiction by maintaining product stability through adequate viscosity while ensuring sufficient fluidity for effective delivery of antibacterial actives to the skin.
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 99% reduction in bacteria within 30-60 seconds and maintains skin barrier integrity by delivering antibacterial actives effectively, ensuring consumer-friendly viscosity and skin compatibility.
Implementation Method 1
Removal of the viruses and bacteria is due to the surfactant behavior of the soap and the mechanical action of the wash procedure
Implementation Method 2
the antimicrobial agent deposits at least in part onto the skin to provide residual protection against subsequent invasion
Data Source
AI summary
An antibacterial cleansing composition including from about 0.01% to about 1% of chloroxylenol by weight of the composition; from about 5% to about 15% of sodium lauryl sulfate by weight of the composition; from about 1% to about 5% of a co-surfactant by weight of the composition, wherein the co-surfactant is selected from zwitterionic surfactant, amphoteric surfactant, nonionic surfactant, or combinations thereof; wherein the weight ratio of sodium lauryl sulfate to the co-surfactant ranges from about 3:1 to about 5:1; and wherein the composition comprises a pH of from about 2 to about 5.