Basf Aktiengesellschaft

Roland Martin

Walter Gramlich

Udo Hoppe

Paul Naegele

Karl Seib

Lothar Janitschke

2-methyl-3-(p-methylphenyl)-propionitrile is prepared for use as a scent.

2-methyl-3-(p-methylphenyl)propionitrile, preparation and use thereof as

Compounds of the formula I ##STR1## where the individual radicals R are identical or different and are each hydrogen, an alkali metal, or ammonium which is unsubstituted or substituted by organic radicals, or are each C.sub.1 -C.sub.20 -alkyl or a polyoxyethylene radical which contains from 1 to 10 ethylene oxide units and whose terminal OH group may be etherified by an alcohol of 1 to 3 carbon atoms, are used as sun screen agents.

s-Triazine derivatives and their use as sun screen agents

Alkylbenzenes of the general formula I ##STR1## where R.sup.1 is C.sub.1 -C.sub.4 -alkyl, preferably methyl, and R.sup.2 is hydrogen or C.sub.1 -C.sub.4 -alkyl, preferably methyl, are prepared by catalytic aromatization of the corresponding alkenylcyclohexenes of the general formula II ##STR2## by carrying out the conversion in the gas phase at 150.degree.-400.degree. C. over a catalyst which contains palladium oxide and sulfur and/or selenium or selenium oxide on active carbon.

Preparation of p-cymene and homologous alkylbenzenes

s-Triazine compounds which can be used as sunscreen agents are prepared in a technically simpler manner by a process in which an ester of a branched alkanoic acid with a saturated aliphatic alcohol or, if appropriate, a mixture of such alcohols is used as the solvent in the reaction of a cyanuric halide with a p-aminobenzoate.

Preparation of s-triazine derivatives

##STR1## where the individual radicals R are identical or different and are each hydrogen, an alkali metal, or ammonium which is unsubstituted or substituted by organic radicals, or are each C.sub.1 -C.sub.20 -alkyl or a polyoxyethylene radical which contains from 1 to 10 ethylene oxide units and whose terminal OH group may be etherified by an alcohol of 1 to 3 carbon atoms, are used as sun screen agents.

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Kaiserslautern, Germany

Roland Martin