BEMT Sunscreen Composition for Reduced Whitening and Heavy Feel
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Solution Overview
Problem
Existing sunscreens with high SPF levels using inorganic UV-filters like titanium dioxide and zinc oxide suffer from a heavy, gritty feel and a white/blue residual on the skin, while organic UV-filters like isoamyl p-Methoxycinnamate, Diethylamino hydroxybenzoyl hexyl benzoate, and Octocrylene have hormonal activity concerns and cause discoloration.
Innovation Solution
Combining bis-ethylhexyloxyphenol methoxyphenyl triazine (BEMT) and butyloctyl salicylate in sunscreen compositions without isoamyl p-Methoxycinnamate, Diethylamino hydroxybenzoyl hexyl benzoate, and Octocrylene, particularly with double-coated titanium dioxide, reduces the skin whitening effect and improves aesthetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inorganic UV-filters (titanium dioxide, zinc oxide) are used to achieve high SPF levels, then sun protection factor is improved, but skin feel becomes heavy and gritty with white/blue residual
Solution Approach 1:
The patent introduces a specific combination of organic UV-filters (bis-ethylhexyloxyphenol methoxyphenyl triazine and butyloctyl salicylate) as intermediary substances that mediate between the inorganic UV-filters and the skin. This combination reduces the direct contact and interaction between inorganic particles and skin, thereby reducing the heavy and gritty feel while maintaining the SPF protection provided by the inorganic filters.
Solution Approach 2:
The patent creates a composite sunscreen formulation combining specific ratios of organic UV-filters (BEMT and BHB) with inorganic UV-filters. This composite approach allows the organic components to modify the behavior and skin interaction of the inorganic particles, achieving both high SPF and improved skin feel through the synergistic effect of the composite material system.
2Reliability
If inorganic UV-filters are used to achieve high SPF levels, then sun protection factor is improved, but aesthetic appearance deteriorates with white/blue residual on skin
Solution Approach 1:
The organic UV-filter combination acts as an intermediary layer that reduces the optical interaction between inorganic particles and skin, minimizing the white/blue residual effect. The specific molecular structures of BEMT and BHB interfere with the light scattering properties of inorganic particles, reducing their visible whitening effect while maintaining UV absorption capability.
Solution Approach 2:
The patent optimizes the concentration ratios and particle size parameters of the inorganic UV-filters in combination with the organic filters. By adjusting these parameters, the formulation achieves high SPF protection while minimizing the aesthetic drawbacks of inorganic particle visibility on the skin surface.
3Ease of operation
If organic UV-filters (isoamyl p-Methoxycinnamate, Diethylamino hydroxybenzoyl hexyl benzoate, Octocrylene) are used to improve skin feel, then ease of operation is improved, but harmful effects increase due to hormonal activity and discoloration
Solution Approach 1:
The patent extracts and eliminates the problematic organic UV-filters (isoamyl p-Methoxycinnamate, Diethylamino hydroxybenzoyl hexyl benzoate, and Octocrylene) from the formulation, removing the source of hormonal activity concerns and discoloration issues while replacing them with the safer BEMT and BHB combination that provides equivalent or improved skin feel.
Solution Approach 2:
The patent replaces controversial organic UV-filters with alternative organic filters (BEMT and BHB) that have shorter environmental persistence and lower hormonal activity potential. The new combination provides the desired skin feel properties without the long-term harmful effects associated with the disclaimed ingredients.
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 of BEMT and butyloctyl salicylate with inorganic UV-filters provides high SPF without the heavy feel and whitening effect, addressing consumer concerns and formulation stability.
Implementation Method 1
bis-ethylhexyloxyphenol methoxyphenyl triazine (BEMT), butyloctyl salicylate and at least one inorganic UV-filter selected from titanium dioxide and zinc oxide
Implementation Method 2
inorganic UV-filters, i.e. micronized (often also called microfine) metal oxides such as titanium dioxide or zinc oxide are particularly useful in sunscreen applications due to their ability to increase the sun protection factor (SPF) of formulations over a broad UV range
Data Source
AI summary
The present invention relates to specific topical compositions comprising bis-ethylhexyloxyphenol methoxyphenyl triazine (BEMT), butyloctyl salicylate and at least one inorganic UV-filter selected from titanium dioxide and zinc oxide. Said compositions exhibit an appealing skin feel and look.