Phenoxyalkyl Esters Solubilizing UV Filters
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Solution Overview
Problem
Current cosmetic and dermatological formulations face challenges in achieving good solubility and stability for high-dose UV light protection filters, particularly UV-B filters like Ethylhexyl Triazone, which have poor solubility in lipids, limiting their concentration in formulations.
Innovation Solution
The use of phenoxyalkyl esters of C6-C12 alkyl and cycloalkylcarboxylic acids as solubilizers and solvents in cosmetic, dermatological, or pharmaceutical formulations, enhancing the solubility of UV light protection filters and deodorant/antiperspirant active ingredients.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high concentrations of UV light protection filters are used to achieve high SPF values, then the protective effect against UV radiation is improved, but the solubility and stability of the formulation deteriorates
Solution Approach 1:
The patent employs phenoxyalkyl esters as intermediary solubilizing agents that mediate between the UV filters and the formulation base. These esters specifically solubilize UV-B filters like Ethylhexyl Triazone, enabling high concentrations (3-30% w/w) to be incorporated while maintaining formulation stability and homogeneity.
Solution Approach 2:
The patent changes the chemical parameters of the formulation by introducing phenoxyalkyl esters with specific molecular structures (phenoxy group combined with ester functionality). This parameter change enables the formulation to accommodate high concentrations of previously insoluble UV filters without compromising stability.
2Quantity of substance
If conventional ester oils are used as solvents for UV filters, then the dissolving power is improved, but the sensory properties and dermatological compatibility of the formulation deteriorates
Solution Approach 1:
The patent uses phenoxyalkyl esters as composite oil bodies that combine the solubilizing properties of ester oils with the sensory benefits of more skin-friendly ingredients. The phenoxy group provides excellent solubility for UV filters, while the ester structure maintains good sensory properties and dermatological compatibility.
3Reliability
If the concentration of UV sun protection filters is increased to achieve higher SPF values, then the sun protection factor is improved, but the ease of homogeneous dissolution deteriorates
Solution Approach 1:
Phenoxyalkyl esters act as intermediary solubilizers that facilitate the homogeneous dissolution of high concentrations of UV filters. The specific molecular structure of these esters enables them to interact with both the UV filters and the formulation base, ensuring uniform distribution even at concentrations of 3-30% w/w.
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
Phenoxyalkyl esters significantly improve the solubility of UV light protection filters, allowing for higher concentrations in formulations, thereby enhancing the protective properties against UV radiation while maintaining good sensory properties.
Implementation Method 1
phenoxyalkyl esters of C6-C12 alkyl and cycloalkylcarboxylic acids as solubilizers and solvents in cosmetic, dermatological, or pharmaceutical formulations, enhancing the solubility of UV light protection filters
Data Source
AI summary
The invention relates to the use of phenoxyalkyl esters of C6-C12 alkyl and cycloalkyl carboxylic acids for the production of a cosmetic, dermatological or pharmaceutical formulation.