Basf Aktiengesellschaft

Basf Magnetics Gmbh

Emtec Magnetics Gmbh

Thomas Wunsch

Horst Westenfelder

Thorsten Habeck

Volker Schehlmann

Alexander Aumuller

August Lehner

Albert Kohl

Norbert Schneider

Gregor Brodt

Ria Kress

Karin Sperling

Sylke Haremza

Alexander Aumueller

Werner Balz

Werner Loch

Frank Prechtl

Oskar Stephan

Martin Holderbaum

Norbert Muller

Uwe Burkhardt

Jochen Eicher

Karl-Heinz Sartor

Beate Trentmann

Axel-Rudiger Schulze

The invention relates to the use of substituted, dimeric .alpha.-alkylstyrene derivatives of the formula I ##STR1## in which the substituents are as defined in the description, as photostable UV filters in cosmetic and pharmaceutical preparations for protecting human skin or human hair against solar rays, alone or together with compounds which absorb in the UV region and which are known per se for cosmetic and pharmaceutical preparations.

Dimeric .alpha.-alkylstyrene derivatives as photostable UV filters in

The present invention relates to cosmetic compositions comprising a combination of sunscreen filters of the formula ##STR1## with other sunscreen filters.

Cosmetic compositions comprising a combination of UV absorbers

Cosmetic or pharmaceutical preparations for protecting human skin or human hair from solar rays which contain

Cosmetic or pharmaceutical preparations comprising 1,3,5-triazine

Recovery of raw materials from magnetic recording media

Use of 4,4-diarylbutadienes of the formula I, ##STR1## where the variables have the meanings explained in the description, as water-soluble photostable UV filters in cosmetic and pharmaceutical preparations for protecting the human skin or human hair from the sun's rays, alone or together with compounds which absorb in the UV region and are known per se for cosmetic and pharmaceutical preparations.

4,4-diarylbutadienes as water-soluble photostable UV filters for

The use of substituted .alpha.-methylstyrene derivatives of the formula I, ##STR1## where the variables have the following meanings: R.sup.1 C.sub.4 -C.sub.10 -alkoxy, C.sub.1 -C.sub.12 -alkylamino, C.sub.1 -C.sub.12 -dialkylamino, substituents which confer solubility in water and which are selected from the group consisting of carboxylate, sulfonate or ammonium residues;

Cosmetic and pharmaceutical preparations comprising photostable UV

A cosmetic preparation which comprises a sunscreen agent for protecting the human epidermis against UV light in the range from 280 to 400 nm, which comprises, in a cosmetically suitable carrier, alone or together with compounds which absorb in the UV region and are known for cosmetic preparations, as photostable UV-A filters, effective amounts of compounds of the formula I ##STR1## where R.sup.1, R.sup.2 and R.sup.3 are hydrogen or aliphatic or cycloaliphatic radicals each having up to 18 carbon atoms, it being possible for any two of the radicals R.sup.1, R.sup.2 and R.sup.3 together to form a 5- or 6-membered ring, and R.sup.4 and R.sup.5 are an unsubstituted or substituted aromatic or heteroaromatic radical having 5 to 12 ring atoms, and R.sup.5 can additionally be hydrogen.

Cosmetic preparations comprising photostable UV-A filters

A method of using compounds of formula I ##STR1## in which the C.dbd.C double bond is present in E and/or Z configuration and the variables R.sup.1, R.sup.2, R.sup.3 and R.sup.4 have the meanings defined in the specification disclosure, as UV filters, particularly UV-A filters, in cosmetic and pharmaceutical formulations for the protection of the human skin or human hair from solar radiation, alone or together with compounds known per se in cosmetic and pharmaceutical formulations and capable of absorbing radiation in the UV range.

Photo-stable cosmetic and pharmaceutical formulations containing

Hydroxyl-containing polyurethanes I are composed essentially of

Polyurethanes

Cosmetic preparations containing photostable UV-A filters

A method of using compounds of formula I ##STR1## in which the C.dbd.C double bond is present in E and/or Z configuration and the variables have the following meanings:

Preparation of materials (I) having an average molecular weight from 4000 to 30,000, obtainable by reacting

Materials suitable as crosslinkable binder components

A material suitable as crosslinking binder component for pigment-containing coatings and having an average molecular weight of from 25,000 to 150,000, obtainable by reacting a polyurethane comprising a diol having a molecular weight between 400 and 4,000, an aliphatic or cycloaliphatic diol of 2-18 carbon atoms, an aromatic diol of 8-36 carbon atoms, a trihydric or polyhydric alcohol of 3-18 carbon atoms, a polyhydric alcohol of 3-40 carbon atoms containing a tertiary amino group, and a diisocyanate of 3-34 carbon atoms with a compound containing one or more hydroxyl groups and one or more amino groups reactive toward isocyanate groups. The materials may be used as crosslinkable binder components for pigment-containing coatings, in particular for the production of magnetic recording materials.

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Speyer, Germany

Thomas Wunsch