Non-Staining UV Filter Mixture for Skin Protection
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Solution Overview
Problem
Current sunscreen formulations using UVA filters like Avobenzone, Tinosorb S, Uvinul A Plus, and Benzophenone-3 often cause staining on clothing, which is difficult to remove and poses a concern for consumers, limiting their effectiveness in providing high UVA protection without discoloration issues.
Innovation Solution
Aqueous mixtures comprising disodium phenyl benzimidazole tetrasulfonic acid, Avobenzone, diethylhexyl naphthalate, and additional UV absorbing substances such as 2-ethylhexyl 2-cyano-3,3-diphenylacrylate, applied to human skin to protect against UV radiation from 280 to 400 nm, without causing staining.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UVA filters like Avobenzone, Tinosorb S, Uvinul A Plus, and Benzophenone-3 are used to provide high UVA protection, then UVA protection factor is improved, but staining on clothing occurs which is difficult to remove
Solution Approach 1:
The patent modifies the chemical structure of UVA filters by introducing sulfonate groups and using specific molecular architectures (benzimidazole, triazine, dibenzoylmethane derivatives) that change the staining properties while maintaining UV absorption. The disodium phenyl benzimidazole tetrasulfonic acid and related compounds provide high UVA protection through parameter optimization of molecular structure
Solution Approach 2:
The invention uses composite UV filter systems combining multiple different chemical types (benzimidazole sulfonates, triazines, dibenzoylmethanes, cinnamates, acrylates) to achieve synergistic effects. This composite approach provides broad-spectrum UVA protection while the specific combination prevents staining, as each component contributes different properties to the overall formulation
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 formulation effectively protects human skin from UV radiation across the 280-400 nm range without causing staining on clothing, addressing the limitations of existing UVA filters by providing a non-staining, high UVA protection solution.
Implementation Method 1
UV absorbers are compounds which have a pronounced absorption capacity for ultraviolet radiation
Data Source
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AI summary
Suggested is a cosmetic and/or pharmaceutical preparation, especially dermatological preparation and its used for the protection of the human skin and human hair against the harmful effects of ultraviolet solar radiation comprising the water soluble UVA absorbing substance disodium phenyl dibenzimidazole tetrasulfonate, wherein the preparation is free from the UVA filters selected from the group consisting of 2,4-bis[{(4-(2-ethylhexyloxy)-2-hydroxy}phenyl]--6-(4-methoxyphenyl)-1,3,5-triazine, (Tinosorb®S), hexyl 2-(4-diethylamino-2-hydroxybenzoyl)benzoate (Uvinul® A Plus), 2-hydroxy-4-methoxybenzo-phenone (Benzophenone-3, Oxybenzone, Neo Heliopan® BB), Tris-Biphenyl Triazine (Tinosorb® A2B) or mixtures thereof.