New UV Absorbers for Cosmetic Sunscreens – A Breakthrough for the Photoprotection of Human Skin

Two new UV filters for use in cosmetic sunscreens have been developed. Bis-ethylhexyloxyphenol methoxyphenyl triazine (BEMT) is a hydroxy-phenyl-triazine derivative, which has been designed for optimal spectral performance, excellent photostability, and solubility in cosmetic oils. Methylene bis-ben...

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Bibliographic Details
Published inChimia Vol. 58; no. 7-8
Main Authors Bernd Herzog, Dietmar Hüglin, Elek Borsos, Albert Stehlin, Helmut Luther
Format Journal Article
LanguageEnglish
Published Swiss Chemical Society 01.07.2004
Subjects
Particle size
Photostability
Sunscreen
Uv absorber
Uva
Uvb
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Summary:Two new UV filters for use in cosmetic sunscreens have been developed. Bis-ethylhexyloxyphenol methoxyphenyl triazine (BEMT) is a hydroxy-phenyl-triazine derivative, which has been designed for optimal spectral performance, excellent photostability, and solubility in cosmetic oils. Methylene bis-benzotriazolyl tetramethylbutylphenol (MBBT) is the active ingredient of a particulate UV-filter system, which is available as a 50% dispersion of MBBT. Since the UV-attenuating efficacy depends strongly on particle size, the material is micronised to particle sizes below 200 nm. The mode of action of this photostable filter system is governed to about 90% by absorption and 10% by scattering of UV light. Both filters show broad-spectrum characteristics with significant protection in the UVA range.
ISSN:0009-4293
2673-2424
DOI:10.2533/000942904777677632