Alkyl Benzoate Mixtures for UV Filter Solubility
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Solution Overview
Problem
Existing alkyl benzoates in cosmetic preparations face challenges with solubility and stability of UV photoprotective filters, particularly crystalline filters, and have suboptimal sensory properties.
Innovation Solution
Alkyl benzoate mixtures with a defined alkyl chain distribution, where the fraction of uneven-numbered alkyl benzoates is limited, and a higher proportion of C12 and C14 alkyl benzoates, enhance solubility and sensory properties by optimizing the carbon chain distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional alkyl benzoates are used as oil bodies, then the cosmetic preparations can be formulated with basic cleansing and care functions, but the solubility of UV photoprotective filters (especially crystalline filters) is insufficient and stability is compromised
Solution Approach 1:
The patent changes the physical-chemical parameters of the alkyl benzoate oil body by defining a specific carbon chain distribution (C12: 40-70%, C14: 20-50%, C16: 5-20%, C18: 1-10%). This parameter optimization resolves the contradiction by achieving both improved UV filter solubility/stability and enhanced sensory properties through the balanced carbon chain composition.
Solution Approach 2:
The patent creates a composite alkyl benzoate mixture combining multiple carbon chain lengths (C12-C18) in specific proportions. This composite approach allows the oil body to simultaneously provide excellent solubility for crystalline UV filters, storage stability, and improved sensory characteristics that single-chain-length alkyl benzoates cannot achieve alone.
2Reliability
If alkyl benzoates with broader carbon chain distribution are used, then more UV filter types can be solubilized, but the sensory properties and elegance of the cosmetic preparation deteriorate
Solution Approach 1:
The patent optimizes the carbon chain distribution parameters within a controlled range (C12: 40-70%, C14: 20-50%, C16: 5-20%, C18: 1-10%) to achieve the best balance between UV filter solubility and sensory properties. This precise parameter control ensures broad UV filter compatibility while maintaining elegant sensory characteristics.
3Ease of manufacture
If existing oil bodies are used for cleansing and care, then the basic cosmetic functions are fulfilled, but the dermatological compatibility and refatting properties are suboptimal
Solution Approach 1:
The patent modifies the oil body composition by specifying a particular carbon chain distribution profile for the alkyl benzoate mixture. This parameter change enhances dermatological compatibility and refatting properties while preserving the essential cleansing and care functions, creating a more skin-friendly cosmetic preparation.
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 alkyl benzoate mixtures improve the solubility and stability of UV photoprotective filters and provide a more elegant sensory impression, making them suitable for cosmetic and pharmaceutical preparations.
Implementation Method 1
the solubility and stability of the UV photoprotective filters in the cosmetic preparations and in particular in the oil bodies is decisive for the UV photoprotective effect
Data Source
AI summary
The invention relates to alkyl benzoate mixtures, the sum of the C12- and C14-alkyl benzoates being greater than or equal to 85%, in relation to the total sum of the alkyl benzoates. The invention also relates to the use of said alkyl benzoate mixtures in cosmetic and/or pharmaceutical preparations, in particular as oil components.