Photographisches Kopiermaterial oder Behandlungsbad mit Antibronzierungsmittel

摘要

N-Phenyl-N1-21-mercapto-ethylurea and N-(1-naphthyl) - N1 - 2 - mercapto - ethylurea are prepared by reacting b -mercaptoethylamine with phenyl or a -naphthyl isocyanate in anhydrous benzene. N - 2 - Naphthyl - 21 - mercapto ethyl carbamate is prepared by reacting b -naphthylisocyanate with b -mercaptoethanol in anhydrous benzene.