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US 5,456,727 AGranted
Dye compositions for polyamides
AssigneeHoechst Celanese Corporation
InventorsWalter Heimling, Mark Helle, Kerry Proulx, Leslie McIntosh, Philomen DeCroos
Life of this patent
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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.
Claims4
A dye composition containing at least two dyes having different primary colors wherein said dyes are selected from dyes of the following formulae:
- ##STR5##
Dependencies are inferred from the claim text.