BEMT UV Filter Compositions for Non-Greasy Texture
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Solution Overview
Problem
There is a need for improved compositions that combine organic UV filters with pleasant application properties, such as a non-greasy feeling, while providing effective UV protection.
Innovation Solution
The compositions comprise bis-ethylhexyloxyphenol methoxyphenyl triazine (BEMT) combined with at least one additional organic UV filter, such as Octisalate, Ensulizole, Homosalate, Octocrylene, and mixtures thereof, along with optional Avobenzone and/or mineral UV filters like titanium dioxide and zinc oxide.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If high levels of UV filters are used to achieve high UV protection efficiency, then UV protection performance is improved, but composition stability and texture quality deteriorate
Solution Approach 1:
The patent optimizes the concentration parameters of specific UV filters (BEMT at 1-10%, Octocrylene at 1-5%, Avobenzone at 0.1-5%) to achieve high UV protection efficiency while maintaining composition stability. By precisely controlling these parameter ranges, the formulation avoids the instability issues associated with high levels of multiple UV filters.
Solution Approach 2:
The patent creates a composite UV filter system combining BEMT, Octocrylene, and Avobenzone in specific proportions. This composite approach provides synergistic UV protection while the specific composition ratios ensure stability, avoiding the problems of simple high-concentration single-filter formulations.
2Reliability
If high levels of UV filters are used to achieve high UV protection efficiency, then UV protection performance is improved, but application texture and feel deteriorate
Solution Approach 1:
The patent controls the total concentration of UV filters within specific ranges (BEMT: 1-10%, Octocrylene: 1-5%, Avobenzone: 0.1-5%) to maintain pleasant application texture while achieving high UV protection. This parameter optimization prevents the greasy feeling associated with excessive filter concentrations.
Solution Approach 2:
The patent assigns specific functional roles to different UV filters within the composition: BEMT provides broad-spectrum protection, Octocrylene enhances UVB protection, and Avobenzone addresses UVA protection. This localized functional distribution optimizes both protection efficiency and texture properties.
3Reliability
If a large number of sunscreens and UV filters are combined to achieve high filtering efficiency, then UV protection performance is improved, but formulation complexity increases
Solution Approach 1:
The patent simplifies the formulation by optimizing the parameters of only three key UV filters (BEMT, Octocrylene, Avobenzone) rather than combining many different sunscreens. This reduced parameter set achieves high filtering efficiency while maintaining formulation simplicity and stability.
Solution Approach 2:
The selected UV filters provide multi-functional protection: BEMT offers broad-spectrum coverage, Octocrylene provides UVB protection and anti-grease properties, and Avobenzone addresses UVA protection. This multi-functionality reduces the need for multiple separate filters, simplifying 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
These compositions achieve high UV protection efficiency, as evidenced by SPF values of at least 15, critical wavelength of at least 370 nm, and favorable UVA/UVB ratios, while maintaining a pleasant texture and non-greasy feel.
Implementation Method 1
compositions comprising bis-ethylhexyloxyphenol methoxyphenyl triazine (BEMT or bemotrizinol) and at least one additional organic UV filter
Data Source
AI summary
The present disclosure relates to compositions including 2,4-bis-{[4-(2-ethyl hexyloxy)-2-hydroxy]-phenyl}-6-(4-methoxyphenyl)-1,3,5-triazine and additional organic UV filter(s), as well as to methods of making and using such compositions.