Merck Patent Gesellschaft MIT Beschrankter Haftung

Merck Patent Gesellschaft MIT

Merck Patent Gesellschaft MIT Beschraenkter Haftung

Merck Gmbh

Merck Patent Gmbh

Thekla Kurz

Sabine Hitzel

Roland Martin

Dorothee Wille

Ulrich Heywang

Ralf Emmert

Michael Schwarz

Ingeborg Stein

Gerd Bauer

Mohammad Jalalian

HansJ&uuml;rgen Driller

Andrea Spiller

Sieglinde Stossel

Heike Schuchmann

The invention relates e.g. to the use of aldehydes and/or ketones for improving the stability of cosmetic formulations containing butylmethoxydibenzoylmethane as organic light protection filters in conjunction with inorganic light protection filters.

Stable cosmetic formulation containing butylmethoxydibenzoylmethane

A cosmetic preparation having butylmethoxydibenzoyhmethane as a protection filter and insoluble inorganic particles which are titanium dioxide particles doped with cerium or iron ions which absorb in the UVA region and are added to improve the photostability of the cosmetic preparation.

Light-stable cosmetic formulation containing butylmethoxydibenzoylmethane

The invention related to powder mixtures containing formaldehyde- and/or formic acid-releasing compounds which have skin-tanning properties, which powder mixtures contain an agent which forms sulphite ions and, if appropriate, a stabilizer, and to the preparation and use of these powder mixtures for manufacturing cosmetic or pharmaceutical preparations.

Skin-coloring powder mixture

The present invention relates to stable aqueous formulations of the insect repellent ethyl 3-(N-butyl-acetamino)propionate.

Stable aqueous formulation of 3-(N-butylacetamino)-propionic acid ethyl ester

The invention relates to novel light protection filters for the VIS and IR region for the preparation of sunscreens and also to the use thereof in cosmetics. The invention further relates to sunscreens which have broad-band or ultraspectral protection.

Sunscreens having ultraspectral protection

The present invention relates to a dispersion of inorganic UV filters in liquid UV filters and their use in sunscreens.

Dispersion of inorganic UV filters

The invention relates to the use of .alpha.-hydroxyketoalkyl derivatives as light protection filters for cosmetic or pharmaceutical products, the .alpha.-hydroxyketoalkyl group being linked, if appropriate via a spacer, to a chromophoric group which has an absorption maximum in a wavelength range of between 280 and 400 nm and has a conjugated .pi.-electron system of at least 8 .pi.-electrons, and to new .alpha.-hydroxyalkyl derivatives, processes for their preparation and pharmaceutical and cosmetic formulations comprising these derivatives as light protection substances.

.alpha.-hydroxyketoalkyl derivatives as light protection filters

A light-stable cosmetic composition for protection from UV rays having a wavelength of between 280 and 400 nm, which contains at least one tetraalkylquercetin in a cosmetically acceptable oil-based medium, and new tetraalkylquercetins.

Light-stable cosmetic composition

The invention relates to powder mixtures containing formaldehyde- and/or formic acid-releasing compounds which have skin-tanning properties, which powder mixtures contain an agent which forms sulphite ions and, if appropriate, a stabilizer, and to the preparation and use of these powder mixtures for manufacturing cosmetic or pharmaceutical preparations.

Use of .alpha.-hydroxyketoalkyl derivatives as light protection filters

The invention relates to a skin-coloring preparation, containing a hydroxycarbonyl compound which has self-tanning properties, in a cosmetologically acceptable carrier, which preparation contains at least one colorant which adheres to the skin.

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Darmstadt, Germany

Thekla Kurz