Aromatic Sulfonate Self-Tanning Composition for Bronze Hue Control
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Solution Overview
Problem
Conventional self-tanning products often produce unnatural colors, insufficient darkness, or rapidly fading tones, failing to achieve a desirable bronze/red hue and long-lasting skin tone.
Innovation Solution
A topical skincare composition comprising a reducing sugar, an alkali metal aromatic sulfonate with a topological polar surface area of less than 100 Ų, and a carrier, in specific weight ratios, enhances the Maillard reaction to produce a deep, long-lasting bronze/red tan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional self-tanning products using dihydroxyacetone (DHA) are used, then skin darkening is achieved, but the color appears unnatural with an undesirable orange hue
Solution Approach 1:
The patent modifies the chemical parameters of the tanning reaction by introducing aromatic sulfonate compounds and controlling the ratio of reducing sugars to DHA. This changes the reaction pathway to produce melanoidins with different chromophore structures, shifting the color from orange to bronze/red tones while maintaining skin darkening effectiveness
Solution Approach 2:
The invention creates a composite tanning system combining DHA, reducing sugars (erythrulose, glucose), and aromatic sulfonate compounds. This composite approach allows multiple chemical reactions to occur simultaneously, producing a complex mixture of pigments that achieve the desired bronze/red hue rather than the simple orange color from DHA alone
2Illumination intensity
If conventional self-tanning products are used, then initial skin coloration is achieved, but the color fades rapidly
Solution Approach 1:
The patent incorporates reducing sugars and aromatic sulfonates that prepare the skin surface and modify the Maillard reaction pathway in advance. These preliminary chemical modifications create a more stable pigment foundation that resists fading, allowing the tan to last longer than conventional DHA-only products
Solution Approach 2:
By adjusting the concentration ratios of reducing sugars to DHA and selecting specific aromatic sulfonate compounds with particular molecular weights and functional groups, the patent optimizes the stability parameters of the resulting pigments. This parameter control ensures slower degradation and extended color longevity
3Illumination intensity
If stronger skin darkening is pursued, then deeper color is achieved, but the hue becomes less desirable and more orange
Solution Approach 1:
The patent precisely controls the parameter of reducing sugar to DHA ratio (typically 1:4 to 4:1) and selects aromatic sulfonate compounds with specific structural parameters. This parameter optimization allows the reaction to produce darker pigments while maintaining bronze/red hue quality, avoiding the orange coloration that occurs with excessive DHA concentration alone
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 effectively adjusts skin color by reducing lightness, increasing saturation, and shifting hue angle, providing an aesthetically pleasing, intense, and fade-resistant tan.
Implementation Method 1
enhances the Maillard reaction to produce a deep, long-lasting bronze/red tan
Data Source
AI summary
A topical skincare composition that includes (A) a reducing sugar, (B) an aromatic sulfonate having a topological polar surface area (tPSA) of less than 100 Å2, and (C) a carrier. A method for adjusting color appearance (e.g., hue angle, lightness, saturation) of skin, which involves applying the topical skincare composition onto the skin is also specified. The topical skincare composition can provide a deep, rich, long lasting sunless tan with aesthetically pleasing red/bronze tone when applied onto the skin.