BIS-1:2 CHROME-DISAZO-BISAZO METHINE DYESTUFFS, THEIR PREPARATION AND USE FOR DYEING POLYAMIDE OR CELLULOSE MATERIALS AND LEATHER

摘要

Bis-1:2 chromium complex dyes consisting of 2-chromium atoms, 2 molecules of a metallizable azo or azomethine compound and a bisazomethine of the formula IMAGE wherein X is a direct bond or a bridge member, R1 is hydrogen or a substituent, and A is a benzene or naphthalene radical or a substituted or unsubstituted aliphatic or cycloaliphatic radical.