Cleanser Composition Stabilizing Salicylic Acid
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Solution Overview
Problem
Cleanser compositions with high levels of salicylic acid face challenges in stabilizing water insoluble materials and maintaining viscosity, making it difficult to create shelf-stable products that provide a comfortable user experience.
Innovation Solution
The use of sodium cocoyl isethionate and acrylate copolymer in combination with bio-based surfactants allows for the stable suspension of water insoluble ingredients, such as hectorite, in a cleanser composition, maintaining viscosity and stability over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high levels of salicylic acid are included in the cleanser composition, then acne treatment effectiveness is improved, but formulation stability and shelf life deteriorate
Solution Approach 1:
The patent changes the pH parameter of the formulation to be acidic (matching salicylic acid's pKa), which stabilizes the high concentration of salicylic acid (0.5-2.0%) while maintaining formulation stability and shelf life
Solution Approach 2:
The patent uses a composite surfactant system combining multiple surfactants (sodium cocoyl isethionate, sodium lauroyl sarcosinate, and other biodegradable surfactants) to achieve both high salicylic acid stability and effective cleansing, resolving the contradiction between active ingredient stability and formulation performance
2Ease of operation
If water insoluble materials are suspended in the cleanser, then exfoliation and skin treatment properties are improved, but viscosity stability and suspension maintenance deteriorate
Solution Approach 1:
The patent uses specific surfactants as intermediary agents that bridge the water-soluble and water-insoluble phases, enabling stable suspension of exfoliating particles (0.05-10.0%) while maintaining consistent viscosity and preventing separation during shelf storage and freeze/thaw cycles
Solution Approach 2:
The patent optimizes the viscosity and pH parameters of the formulation to maintain stable suspension of water-insoluble materials, using acidic pH conditions and specific surfactant concentrations to prevent particle settling while ensuring viscosity stability over time
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
This approach ensures that the water insoluble ingredients remain suspended, maintaining the cleanser's viscosity and stability, even under freeze/thaw cycles, while providing effective acne treatment with high levels of salicylic acid.
Implementation Method 1
a first surfactant sodium cocoyl isethionate; c. at least one one acrylate copolymer; d. a water insoluble ingredient; wherein the cleanser is stable and the water insoluble ingredient stays in suspension
Data Source
AI summary
The present disclosure relates to cleanser compositions, which generally include a. salicylic acid; b. a first surfactant sodium cocoyl isethionate; c. at least one acrylate copolymer; d. a water insoluble ingredient. The cleanser compositions contain a high level of salicylic acid and exhibits very good cleansing properties as well as being stable.