The Polycyclo Ring System Is Attached Indirectly By Nonionic Bonding To An Additional Polycyclo Ring System Having A Least Three Cyclos (e.g., Plural Anthracene Configured Ring Systems Bonded Directly To The Same Nitrogen, Etc.) Patents (Class 552/274)
  • Vat dyes
    Patent number: 5334734
    Abstract: Vat dyes for dyeing and printing cellulose material have the formula ##STR1## where P=pyranthrone structure, A=1,4-or 1,5-anthraquinonyl, V=a violanthronyl or isoviol-anthronyl radical which may carry up to 2 chlorine or bromine atoms as substitutents, R=hydrogen, the acyl radical of an aliphatic C.sub.1 -C.sub.6 -carboxylic acid or the acyl or sulfonyl radical of an aromatic carboxylic or sulfonic acid, Hal=chlorine or bromine, m=from 0 to 3, n=from 1 to 4, and p=from 0 to 3, with the proviso that the sum m+n+p is not greater than 4.
    Type: Grant
    Filed: October 26, 1992
    Date of Patent: August 2, 1994
    Assignee: BASF Aktiengesellschaft
    Inventors: Matthias Niedenbrueck, Manfred Patsch