Cationic dyestuff printing inks
AssigneeScott Paper Company
InventorAlex Pociluyko
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Abstract
Bleed-fast, dyes cellulosics particularly absorbent papers have been obtained with a particular class of water-soluble, cationic dyes reacted with a water-soluble aldehyde, preferably formaldehyde, glyoxal or glutaraldehyde. An aqueous printing fluid containing the water-soluble cationic dye and the aldehyde, upon drying, produces a water-resistant dyestuff having improved bleed fastness upon cellulosic fibers.
Claims3
The reaction product of an aldehyde selected from the group consisting of formaldehyde, glyoxal and glutaraldehyde and a cationic, water-soluble dyestuff having a functional group capable of reacting with said aldehyde wherein the functional group of the cationic, 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.