Sun Protection Factors and UVA-Parameters of O/W-Sunscreen Emulsions Containing Bis-Ethylhexyloxy Methoxyphenyl Triazine
Publication Date: 2002-Jul-11
The IP.com Prior Art Database
Sunscreen formulations of the o/w-type containing different amounts of the UV-broadband filter Bis-Ethylhexyloxy Methoxyphenyl Triazine (BEMT) alone or in combination with other UVA- or UVB-absorbers have been investigated with respect to the sun protection factor (SPF) and UVA-parameters. The sun protection factors have been measured in vivo following the COLIPA protocol, whereas the UVA-parameters UVA/UVB-ratio and critical wavelength were determined with an in vitro method. According to the filter contents the SPF- and UVA-data varied over a broad range. SPF-data as well as UVA-parameters could be simulated satisfactorily using a calibrated step film model.