Topical Hydroxy Acid Compositions with Polystyrene Stabilizers
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Solution Overview
Problem
Current topical compositions combining alpha-hydroxy acids and beta-hydroxy acids, such as glycolic acid and salicylic acid, face technical difficulties in achieving stable and homogeneous formulations with high concentrations suitable for skin peeling, typically limited to low concentrations due to formulation challenges.
Innovation Solution
Incorporating water-soluble polystyrenes and their salts, like sodium polystyrene sulfonate, allows for the combination of alpha-hydroxy acids and beta-hydroxy acids at higher concentrations (e.g., glycolic acid at least 10% and salicylic acid at least 5%) in a homogeneous and stable composition, maintaining a low pH for effective topical use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If high concentrations of alpha-hydroxy acids and beta-hydroxy acids are combined in one composition, then the effectiveness for skin peeling is improved, but the formulation stability and homogeneity deteriorates
Solution Approach 1:
The patent introduces water-soluble polystyrenes as intermediary substances that mediate between the alpha-hydroxy acid and beta-hydroxy acid components. These polystyrenes act as formulation carriers that enable high concentrations of both acid types to coexist in a stable, homogeneous mixture, resolving the contradiction between high concentration and formulation stability.
2Quantity of substance
If high concentrations of alpha-hydroxy acids and beta-hydroxy acids are combined in one composition, then the effectiveness for skin peeling is improved, but the homogeneity of the composition deteriorates
Solution Approach 1:
Water-soluble polystyrenes serve as intermediary formulation carriers that distribute and stabilize both alpha-hydroxy acid and beta-hydroxy acid molecules throughout the composition. This intermediary mechanism ensures uniform distribution and homogeneous appearance even at high concentrations, eliminating phase separation and improving composition homogeneity.
3Stability of the object's composition
If low concentrations of alpha-hydroxy acids and beta-hydroxy acids are used, then the formulation stability is maintained, but the effectiveness for skin peeling deteriorates
Solution Approach 1:
The water-soluble polystyrenes act as formulation enablers that allow high concentrations of hydroxy acids to be maintained while preserving stability. The polystyrenes create a stable formulation matrix that prevents degradation and phase separation, enabling the composition to achieve both high effectiveness concentration and formulation stability simultaneously.
Data Source
AI summary
The present disclosure generally relates to topical compositions comprising a combination of at least one alpha-hydroxy acid (e.g., glycolic acid) combined with at least one beta-hydroxy acid (e.g., salicylic acid) in the presence of water-soluble polystyrenes or appropriate salts thereof. The present disclosure further provides methods of making and using such compositions.