Oblon, Fisher, Spivak, McClelland & Maier
Quinophthalone dyes
 Quinophthalone dyes of the formula ##STR1## where X is O or NC--C--R, where R is cyano, unsubstituted or N-substituted carbamyl, carboalkoxy, quinazolonyl, quinoxalinonyl, benzimidazolyl or benzothiazolyl and the rings A, B, the quinoline system and/or the fused benzo systems may be substituted by insolubilizing groups, in surface finishes, printing inks and plastics, in particular in thermoplastics, gives bright hues having good fastness properties coupled with high thermostability. 
BASF Aktiengesellschaft
C C
C09B C09B
inventional inventional
Wolfgang Peter Heinrich
Lotsch Neumann Kowarsch