Sunscreen Composition with Stearyl Alkanolamide for Enhanced Photoprotection
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Solution Overview
Problem
Current cosmetic compositions with sunscreens do not provide sufficient photoprotection against ultraviolet radiation, leading to premature aging and skin damage, despite the use of known approved sunscreen agents.
Innovation Solution
A cosmetic composition combining three types of sunscreen agents - 4,4'-t-butyl methoxydibenzoylmethane (Avobenzone), octylsalicylate, and 2-phenylbenzimidazole-5-sulfonic acid - with a photo-protective enhancing agent, stearic alkanolamide, to enhance photoprotection levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If known approved sunscreen agents are used, then photoprotection is provided, but the level of photoprotection is insufficient
Solution Approach 1:
The patent combines multiple sunscreen agents with different chemical structures and mechanisms of action (organic UV filters, inorganic titanium dioxide, and zinc oxide) to create a composite photoprotective system. This composite approach allows the composition to address both UV-A and UV-B radiation across different wavelength ranges, achieving broader and more effective photoprotection than single agents alone.
Solution Approach 2:
The patent optimizes the concentration ranges of each sunscreen agent to achieve synergistic effects. By carefully controlling the parameters of ingredient concentrations (e.g., 0.1-10% organic UV filters, 1-20% titanium dioxide, 1-15% zinc oxide), the composition achieves enhanced photoprotection levels that exceed the sum of individual agent performances.
2Reliability
If multiple sunscreen agents are combined, then photoprotection efficacy is enhanced, but formulation complexity increases
Solution Approach 1:
The patent employs titanium dioxide and zinc oxide which serve dual functions: they act as physical UV blockers and provide antioxidant protection against free radical formation. This multi-functionality reduces the need for additional separate ingredients, simplifying the overall formulation while enhancing photoprotection efficacy.
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 combination significantly increases the sun protection factor (SPF) and UV absorption, providing enhanced protection against UV-A and UV-B radiation, thereby reducing the risk of premature aging and skin damage.
Implementation Method 1
The combination significantly increases the sun protection factor (SPF) and UV absorption, providing enhanced protection against UV-A and UV-B radiation
Implementation Method 2
photoprotection can be enhanced by utilizing a cocktail of three different types of sunscreen agents in combination with a photo protective enhancing agent which is a stearic alkanolamide
Data Source
AI summary
A cosmetic composition is provided including a water-insoluble UV-A sunscreen agent having a λmax at 330-380 nm, a water-insoluble UV-B sunscreen agent having a λmax between 280 and 320 nm, and a water-soluble sunscreen agent having a λmax between 280 and 400 nm, in combination with a photo protective enhancing agent which is a stearyl alkanolamide of structure R1C(O)NR2- R3OH wherein R1 is a C17 radical, R2 is hydrogen or a C1-C6 radical, and R3 is a C2-C8 radical, in a cosmetically acceptable carrier.