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 pH between 4.5 and 5.5 for an extended period, 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 skin surface pH control is provided, but the pH control duration is short and cannot be maintained over extended periods
Solution Approach 1:
The patent employs a combination of pH-adjusting agents (citric acid, gluconic acid, lactic acid) and buffering agents (sodium citrate, disodium EDTA, phytosphingosine) that work continuously to maintain skin surface pH within the optimal range of 4.5-5.5 for extended periods. This continuous action ensures sustained skin barrier function support without requiring frequent reapplication, directly resolving the contradiction between duration and reliability.
2Reliability
If pH-adjusting agents are applied frequently to maintain pH, then pH control is improved, but application complexity and user burden increase
Solution Approach 1:
The formulation is designed to be self-regulating through its buffer system. Once applied, the combination of weak acids (citric acid pKa 3.13, gluconic acid pKa 3.7, lactic acid pKa 3.86) and their conjugate bases creates a buffer capacity that automatically maintains pH within the target range of 4.5-5.5 without requiring frequent monitoring or reapplication. This self-service mechanism reduces user burden while maintaining reliable skin barrier support.
3Duration of action of moving object
If strong buffering agents are used to extend pH control duration, then duration is improved, but skin irritation risk increases
Solution Approach 1:
The patent carefully selects pH-adjusting agents with specific pKa values (citric acid pKa 3.13, gluconic acid pKa 3.7, lactic acid pKa 3.86) that are optimized to maintain skin surface pH within the physiological range of 4.5-5.5. These parameters are chosen to provide effective buffering without causing irritation, extending pH control duration while maintaining skin compatibility. The gradual release profile of these agents ensures prolonged effect without harshness.
4Manufacturing precision
If multiple pH-adjusting agents are combined to enhance effectiveness, then pH control precision is improved, but formulation complexity increases
Solution Approach 1:
The patent combines multiple pH-adjusting agents (citric acid, gluconic acid, lactic acid) with complementary pKa values in a single formulation, along with buffering agents (sodium citrate, disodium EDTA, phytosphingosine). This merging creates a synergistic buffer system that maintains pH precision across varying skin conditions and environmental factors. The combined approach provides robust pH control without requiring multiple separate products or complex application routines.
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 stabilize skin pH for up to 12 hours, reducing eczema symptoms and enhancing skin barrier function without irritation, thereby improving skin health and preventing conditions like eczema, acne, and psoriasis.
Implementation Method 1
maintaining a first pH buffer at a target skin area between 4.5 and 5.5 for a first period of time by applying a first composition to the target skin area, the first composition with a first buffer capacity concentration of acids and conjugate bases
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.