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US 4,279,814 AGranted
Salicyl phenyl naphthyl trisazo di and trisulfonic developed direct black dyes
AssigneeCrompton & Knowles Corporation
InventorHoward L. Smith
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Abstract
New trisazo compounds that are useful as developed direct black dyes for cellulosic textiles and as self-shade dyes for paper and leather having the structure: ##STR1## wherein R' is at least one of the following groups: ##STR2## and M is H, Na, K, Li, N(R).sub.3 H where R is H, lower alkyl or lower hydroxyalkyl and each of the R groups can be the same or different.
Claims11
A compound having the structure:
- ##STR7## wherein R' is ##STR8## and where M is --H, --Na, --K, --Li or --N(R).sub.3 H and R represents the same or different substituents selected from the group --H, lower alkyl or lower hydroxyalkyl.
Dependencies are inferred from the claim text.