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US 4,359,321 AGranted
Dye compositions and method of using same
AssigneeAmerican Can Company
InventorStephen Y. Lin
Life of this patent
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Abstract
Dispersants, especially well suited for use with insoluble dyes, are produced by reacting hydroxyl benzyl alcohol compounds with sulfonated lignin derivatives. The dispersants have high levels of heat stability, coupled with desirable dye reduction, staining, foaming, milling and viscosity-reducing properties. Dyestuffs, dye pastes and dye baths, as well as methods utilizing them, are provided.
Claims8
A dyestuff composition comprising a water-insoluble dye;
- and the lignin adduct of a sulfonated lignin material containing about 2 to 8 percent by weight of combined organic sulfur, and about 0.05 to 4.0 millimoles, per gram of the lignin moiety of said material, of an hydroxyl benzyl alcohol compound having the general formula:
- ##STR2## wherein n is an integer from 1 to 3 and A is a substituent selected from the group consisting of hydrogen, lower alkyl groups and the hydroxymethyl group, said adduct being present in a weight ratio to said dye of from about 0.25 to 0.75:1.0.
Dependencies are inferred from the claim text.