Rosewood Extract Solubility in Polyol Cosmetics
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Solution Overview
Problem
Plant extracts rich in polyphenols face solubility issues in water, leading to turbid compositions that are not stable, making them ineffective for cosmetic use in combating oxidative skin stress and aging.
Innovation Solution
Combining rosewood extract rich in polyphenols with a specific glycol, such as glycerol, to create a stable and transparent composition by adjusting the weight ratio of the extract to solvent, ensuring solubility and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If plant extracts rich in polyphenols are used in water-based compositions, then antioxidant activity is improved, but solubility and stability deteriorate causing turbidity
Solution Approach 1:
The patent uses a glycol (such as ethylene glycol, propylene glycol, or butylene glycol) as an intermediary substance to bridge the incompatibility between polyphenol-rich plant extracts and water-based compositions. The glycol acts as a co-solvent that enhances the solubility of polyphenols while maintaining the antioxidant activity, thereby preventing turbidity and improving composition stability without sacrificing the beneficial antioxidant effects.
2Reliability
If high concentration of polyphenol extract is used, then antioxidant efficacy is improved, but composition homogeneity and transparency worsen
Solution Approach 1:
The patent optimizes the concentration parameters of both the polyphenol extract and the glycol co-solvent to achieve a balance between antioxidant efficacy and composition homogeneity. By carefully controlling the ratio and concentration of these components, the formulation maintains high antioxidant activity while ensuring complete solubility and transparency, avoiding precipitation or turbidity even at elevated polyphenol concentrations.
3Stability of the object's composition
If rosewood extract is combined with glycerol, then solubility and stability are improved, but composition complexity increases
Solution Approach 1:
The patent applies the local quality principle by selectively using glycerol as the co-solvent specifically for solubilizing the polyphenol-rich rosewood extract, while keeping the rest of the composition (water phase, active ingredients, optional additives) relatively simple. This targeted approach improves solubility and stability locally at the extract-solvent interface without unnecessarily complicating the overall formulation structure.
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 resulting composition is homogeneous, stable, and transparent, effectively combating oxidative skin stress and signs of aging like wrinkles, maintaining stability over time and after centrifugation.
Implementation Method 1
combining a specific plant extract, comprising a large quantity of polyphenols, with a specific glycol such as glycerol, makes it possible to solubilize these polyphenols in a hydrophilic medium
Implementation Method 2
obtain a non-turbid and stable composition
Data Source
AI summary
The present invention relates to a composition, preferably cosmetic, comprising:at least one rosewood extract comprising polyphenols, andat least one solvent selected from:polyols comprising at least three hydroxy functions,mixtures of at least one polyol comprising at least three hydroxy functions and water, andmixtures of at least one polyol comprising at least three hydroxy functions and at least one diolcomprising from 2 to 4 carbon atoms,the weight ratio of rosewood extract to solvent being strictly less than 7:13.