Chalcone Stabilizers for Dibenzoylmethane UV-A Sunscreen
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Solution Overview
Problem
Existing sunscreen compositions containing dibenzoylmethane UV-A sunscreens suffer from low stability when exposed to solar radiation, especially when combined with oil-soluble UV-B sunscreens, leading to reduced efficacy and increased irritation potential.
Innovation Solution
Incorporating chalcone compounds, such as butein and monospermoside isolated from Butea monosperma, into sunscreen compositions to enhance the stability of dibenzoylmethane UV-A sunscreens, even in the presence of UV-B sunscreens, using a cosmetically acceptable base in a water-in-oil emulsion format.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If dibenzoylmethane UV-A sunscreen is combined with oil-soluble UV-B sunscreen, then wide spectrum protection is achieved, but stability of the UV-A sunscreen deteriorates
Solution Approach 1:
The patent introduces chalcone compounds as intermediary substances that mediate between the UV-A and UV-B sunscreen components. These chalcones act as stabilizing agents that prevent the degradation interaction between dibenzoylmethane UV-A filters and oil-soluble UV-B filters, allowing both to coexist without compromising each other's stability while maintaining wide spectrum protection.
2Stability of the object's composition
If synthetic sunscreen stabilizers are used to improve stability, then stability is enhanced, but irritation and allergenic potential increase
Solution Approach 1:
The patent changes the chemical parameter class of stabilizers from synthetic compounds to natural chalcone compounds. By selecting chalcones with specific chemical structures (flavonoid-based natural compounds), the formulation achieves stability enhancement while maintaining biocompatibility and reducing irritation potential associated with synthetic stabilizers.
3Object-affected harmful factors
If natural extracts are used as stabilizers, then mildness and availability are improved, but cost and efficacy may be compromised
Solution Approach 1:
The patent employs composite formulation strategy by combining chalcone compounds (natural stabilizers) with specific ratios of UV-A and UV-B filters in a cosmetically acceptable base. This composite approach ensures that the natural chalcones work synergistically with the sunscreen agents to provide reliable stability enhancement without compromising efficacy, while maintaining the mildness and natural origin benefits.
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 chalcone compounds significantly improve the photostability of UV-A sunscreens, providing prolonged protection against UV radiation while maintaining a mild and cost-effective formulation.
Implementation Method 1
chalcone compounds... for stabilizing cosmetic or dermatologically acceptable substances, the chemical formula of which includes the structural moiety of dibenzoylmethane, against the decomposition caused by UV radiation
Data Source
AI summary
The invention relates to a photoprotective personal care composition that provides enhanced stability of the UV-A sunscreen present therein. The present inventors have found that it is possible to enhance stability of the UV-A sunscreen of the dibenzoylmethane group by including certain compounds of the chalcone group.