Bleed-fast cationic dyestuffs
AssigneeScott Paper Company
InventorAlex Pociluyko
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Abstract
Bleed-fast, dyed cellulosics particularly absorbent papers have been obtained with a particular class of water-soluble, cationic dyes reacted with a water-soluble dialdehyde, preferably glyoxal or glutaraldehyde. An aqueous printing fluid containing the water-soluble cationic dye and the dialdehyde, upon drying, produces a water-resistant dyestuff having improved bleed fastness upon cellulosic fibers.
Claims2
A dyed, non-woven, absorbent, cellulosic web having good bleed fastness comprising cellulosic fibers and a water-insensitive cationic dyestuff on said cellulosic fibers, said dyestuff comprising the reaction product of a dialdehyde selected from the group consisting of glyoxal and glutaraldehyde and a cationic, water-soluble dyestuff having a functional group capable of reacting with the dialdehyde to form a water-insensitive reaction product dyestuff wherein the functional group of the water-soluble dyestuff is a lower alkylene amine of the formula--(CH.sub.2).sub.n NH.sub.2 wherein n is from 1 to 5.
Dependencies are inferred from the claim text.