Topical pH Buffer Composition for Long-Lasting Skin Barrier Support
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Solution Overview
Problem
Existing skin care products fail to maintain optimal skin surface pH over an extended period, leading to disrupted skin barrier function and increased susceptibility to conditions like eczema, acne, psoriasis, and rosacea.
Innovation Solution
Topical formulations comprising specific pH-adjusting agents and buffers, such as citric acid, sodium citrate, gluconic acid, and shea butter, are applied to maintain skin surface pH between 4.5 and 5.5 for extended periods, supporting ceramide production and skin microbiome health.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If existing skin care products are used, then basic skin care functions are provided, but optimal skin surface pH cannot be maintained over extended period
Solution Approach 1:
The patent applies parameter changes by formulating a pH buffer system with specific pKa values (3.13, 4.76, and 6.0) that matches skin physiology. The buffer capacity is optimized to maintain pH within the 4.5-5.5 range for extended periods, transforming the product from providing transient pH adjustment to sustaining long-term pH stability through carefully selected chemical parameters.
Solution Approach 2:
The invention uses a composite buffering system combining multiple acid-conjugate base pairs (citric acid/sodium citrate, gluconic acid, amino acids) rather than a single buffering agent. This composite approach creates synergistic effects that extend pH control duration and improve reliability, as each component contributes to buffering capacity across different pH ranges.
2Reliability
If skin pH is not controlled, then natural skin function is disrupted, but maintaining pH control requires complex formulations
Solution Approach 1:
The pH buffer system serves multiple functions simultaneously: it maintains optimal pH for skin barrier function, supports ceramide synthesis by providing appropriate pH conditions for enzymes, and creates an unfavorable environment for pathogenic bacteria. This multi-functionality reduces the need for separate active ingredients, simplifying the overall formulation while improving skin barrier reliability.
Solution Approach 2:
The buffer system is designed to self-regulate skin surface pH through the inherent buffering capacity of the acid-conjugate base pairs. The formulation automatically resists pH changes from external factors (water, sweat, environmental exposure) without requiring additional active ingredients or complex mechanisms, allowing the buffer itself to serve the skin's pH regulation needs.
3Duration of action of moving object
If pH control is extended to 12 hours, then skin barrier function improves, but formulation stability becomes challenging
Solution Approach 1:
The patent achieves extended pH control by selecting buffer components with pKa values strategically distributed around the target pH range. Citric acid (pKa 3.13, 4.76, 6.0), gluconic acid (pKa 3.7), and amino acids (pKa 1.82-10.7) create overlapping buffering zones that ensure stable pH maintenance for 12 hours or longer, transforming formulation stability through optimized chemical parameters.
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 formulations effectively stabilize skin pH for 6 to 12 hours, reducing and preventing skin conditions by enhancing skin barrier function and supporting enzymatic reactions, while being non-irritating to the skin.
Implementation Method 1
a pH buffer system comprising specific acids and conjugate bases, such as citric acid, sodium citrate, gluconic acid, and shea butter, are applied to maintain a pH range of 4.5 to 5.5 for an extended period
Data Source
AI summary
Provided are methods and composition for treating skin barrier functions and associated disorders. Formulated compositions may be applied on human skin to maintain a desired skin surface pH over an extended period of time without irritating the skin. Maintaining the desired surface pH aids in treatment of eczema, in addition to other skin conditions.