发明授权
US3655638A Azo dyestuffs containing triazines and vattable polycyclic quinones 失效
含有三聚氰胺和增值多环喹啉的AZO DYESTUFFS

Azo dyestuffs containing triazines and vattable polycyclic quinones
摘要:
DYESTUFFS WHEREIN A SIX-MEMBERED HETEROCYCLIC RING CONTAINING THREE NITROGEN ATOMS AS RING MEMBERS IS BOUND TO TWO VATTABLE CHROMOPHORES FREE FROM AULPHONIC ACID GROUPS TO EACH THROUGH AN -NH-BRIDGE, AND THROUGH AN-O-OR-NH-BRIDGE TO A NON-METALLIZABLE AZO DYESTUFF RESIDUE, ARE VALUABLE VAT DYESTUFS WITH EXCELLENT PROPERTIES OF WET FASTNESS AND SURPRISING PROPERTIES IN RESPECT OF APPLICATION.
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