Sunscreen Composition Using Water-Soluble UVA Filter
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Solution Overview
Problem
Current sunscreen compositions face challenges due to the use of UV filters like octocrylene and oxybenzone, which are under health and environmental concern, and cause fabric staining, making them difficult to wash off textiles while providing inadequate UV protection.
Innovation Solution
A sunscreen composition comprising hexyl 2-[4-(diethylamino)-2-hydroxybenzoyl]benzoate and at least one water-soluble UVA filter, excluding octocrylene and oxybenzone, to provide efficient UV-A and UV-B protection while reducing fabric staining and enhancing washability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional UV filters like octocrylene and oxybenzone are used, then UV protection is provided, but fabric staining occurs and washability is reduced
Solution Approach 1:
The patent removes the harmful UV filters (octocrylene, oxybenzone) from the sunscreen composition while maintaining UV protection through alternative filters. This extraction of harmful substances resolves the contradiction by eliminating fabric staining while preserving the essential UV protection function.
Solution Approach 2:
The patent changes the chemical composition parameters of the UV filter system by replacing conventional filters with alternative filters that have different solubility and staining properties. This parameter change enables the composition to provide UV protection without causing fabric staining, thereby resolving the technical contradiction.
2Reliability
If conventional UV filters are used, then UV protection is achieved, but health and environmental concerns arise
Solution Approach 1:
The patent extracts and removes the controversial UV filters (octocrylene, oxybenzone) that raise health and environmental concerns while maintaining effective UV protection through alternative, safer filter ingredients. This extraction resolves the contradiction by eliminating harmful factors while preserving the protective function.
Solution Approach 2:
The patent converts the harm of using controversial filters into a benefit by formulating a sunscreen that explicitly avoids these substances, thereby addressing consumer concerns about health and environmental safety while maintaining equivalent or superior UV protection performance.
3Reliability
If UV filters with low water solubility are used, then UV protection is provided, but fabric staining becomes hard to remove
Solution Approach 1:
The patent changes the solubility parameter of the UV filters by selecting filters with appropriate water solubility characteristics. This parameter change enables the UV filters to provide protection while being easily removable from fabrics during washing, thereby resolving the contradiction between protection efficacy and washability.
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 composition effectively offers broad-spectrum UV protection without the use of controversial filters, reducing fabric staining and improving washability from textiles.
Implementation Method 1
These filters are added to sunscreen or cosmetic compositions. The UV filters are either organic or inorganic, particulate or non-particulate compounds, of which all have a high absorption efficacy in the UV-light range.
Data Source
Figure 1
AI summary
The present invention relates to sunscreen or daily care compositions comprising hexyl 2-[4-(diethylamino)-2-hydroxybenzoyl]benzoate (INCI diethylamino hydroxybenzoyl hexyl benzoate) and at least one water soluble UVA filter, wherein the composition does not comprise 2-hydroxy-4-methoxybenzophenone (INCI oxybenzone) and ethylhexyl-2-cyano-3,3-diphenyl-acrylate (INCI octocrylene). Furthermore, the present invention relates to the use of said composition to reduce fabric staining and to facilitate the washability of a sunscreen or daily care composition.