Basf Se Corporation

Martin Vogt

Thomas Ehlis

Stefan Müller

Jürg Haase

Julie Grumelard

Jochen Giesinger

Gilbert Kreyer

Cyrille Deshayes

Holger Paul

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&#xb0; C. This modification is therefore suitable in dispersions comprising micro-fine particles. 

Crystal modifications of transmission dyes

Disclosed is the use of an aqueous dispersion comprising (a) a micronized sparingly soluble organic compound which has a UV-Vis spectrum with a maximum from 380 to 420 nm; and (b) an anionic dispersing agent for protecting the human skin from browning and skin aging.

Use of transmission dyes for protecting human skin from browning and ageing

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Grenzach-Wyhlen, Germany

Martin Vogt