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US 4,118,182 AGranted
Solutions of azo dyes derived from 4-4-diamino-2,2-stilbenedisulfonic acid
AssigneeE. I. Du Pont de Nemours and Company
InventorSanford Byrom Smith
Life of this patent
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Abstract
Aqueous dye solution, useful for dyeing cellulosic and leather substrates, consisting essentially of, by weight: (i) 10% to 25% of at least one dye selected from the group ##STR1## wherein M is a water-solubilizing cation; (II) 5% TO 20% OF UREA; AND (iii) 55% to 85% of water.
Claims10
The aqueous dye solution consisting essentially of the following components by weight:
- (i) 10% to 25% of at least one dye selected from the group ##STR6## wherein M is a water-solubilizing cation;
- (ii) 5% to 20% of urea;
- and
- (iii) 55% to 85% of water.
1 more element
Dependencies are inferred from the claim text.