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US 5,563,248 AGranted
Fiber reactive formazan dyes containing a vinyl sulfonyl reactive group
AssigneeHoechst Celanese Corporation
InventorsWalter Helmling, Philomen DeCroos
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Abstract
The invention is a dye composition containing two or more dyes of the vinyl sulfone type which can be used in combination to dye polyamide substrates. Preferably the dye compositions of the invention contain at least three dyes of different primary colors.
Claims2
A compound of the formula:
- ##STR5## Wherein Y is selected from vinyl;
- .beta.-sulfatoethyl, .beta.-thiosulfatoethyl, .beta.-phosphatoethyl, .beta.-chloroethyl and R.sub.2 R.sub.3 N--CH.sub.2 --CH.sub.2 -- wherein R.sub.2 and R.sub.3 are independently selected from CH.sub.3, C.sub.2 H.sub.4 SO.sub.3 H, C.sub.2 H.sub.4 OH, C.sub.2 H.sub.5 and CH.sub.2 COOH.
A compound of the formula:
- ##STR6##
Dependencies are inferred from the claim text.