Martin Vogt,Stefan Müller,Julie Grumelard,Cyrille Deshayes,Holger Paul,Jürg Haase,Thomas Ehlis
申请号：
US12597930
公开号：
US08557820B2
申请日:
2008.04.28
申请国别(地区):
US
年份:
2013
代理人:
摘要：
Disclosed is the use of an aqueous dispersion comprising (a) a micronized sparingly soluble organic benzophenone derivative of formula (1), selected from the crystal modifications (B) and (C), wherein the crystal modification (B) is characterized by a peak in the X-ray diffraction pattern at a d-spacing of about 7.70 and wherein the crystal modification (C) is characterized by a peak in the X-ray diffraction pattern at a d-spacing of about 7.06 and (b) a dispersing agent selected from anionic, non-ionic and amphoteric surfactants for protecting the human skin from browning and skin aging. The new crystal modification (C) represents a thermodynamically stable compound of formula (1) at 25° C. This modification is therefore suitable in dispersions comprising micro-fine particles.
