Bayer Aktiengesellschaft

Rolf Bunnenberg

Wilhelm Brandes

Gerd Hanssler

Paul Reinecke

Karlfried Wedemeyer

Andreas Schulze Tilling

Michael Holzbrecher

Andreas Gr&ouml;schl

The invention relates to a process for the preparation of diaminodicyclohexylmethane (&ldquo;PACM&rdquo;) with a proportion of trans,trans-4,4&prime;-diaminodicyclohexylmethane of from 17 to 24% by hydrogenation of diaminodiphenylmethane (&ldquo;MDA&rdquo;) in the presence of a pulverulent catalyst in a continuously operated suspension reactor at a conversion of MDA of at least 95%, based on the amount of MDA used.

Continuous process for the preparation of diaminodicyclohexylmethane

3,6-Disubstituted 2-thioxo-1,3,5-thiadiazin-4-ones of the formula ##STR1## in which R.sup.1 represents hydrogen; alkyl which is optionally monosubstituted or polysubstituted by identical or different substituents; alkenyl which is optionally monosubstituted or polysubstituted by identical or different substituents; alkinyl which is optionally monosubstituted or polysubstituted; cycloalkenyl or cycloalkyl which is optionally monosubstituted or polysubstituted by identical or different substituents; aryl or aralkyl which is optionally monosubstituted or polysubstituted by identical or different substituents; or a heterocyclic structure which is monosubstituted or polysubstituted by identical or different substituents;

3,6-Disubstituted 2-thioxo-1,3,5-thiadiazin-4-ones

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Leichlingen, Germany

Rolf Bunnenberg