US 3,940,247 AGranted

Dye migration control with amine salt of poly(vinyl methyl ether/maleic acid)

AssigneeGAF Corporation

InventorsDerwin Sthare, Richard F. Chambers

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Abstract

In the Thermosol and like processes in which a dye-impregnated textile material is dried prior to fixation, uncontrolled migration of the dye to the surface of the material during the drying operation is obviated by the incorporation of an antimigration additive in the aqueous dye bath liquid, said additive being an amine salt of poly(vinyl methyl ether/maleic acid). The parent poly(vinyl methyl ether/maleic anhydride) from which the said poly(vinyl methyl ether/maleic acid) is prepared by hydrolysis has a specific viscosity of about 0.75 to about 4.5, preferably about 1.0 to 3.5, more preferably from about 2.0 to about 3.5, measured at a concentration of 1 gram of said parent polymer per 100 ml. of methylethyl ketone at 25.degree.C. The additive, employed within the general range of from about 0.05% to about 0.50% by weight based on the total weight of the dye bath, serves to enhance the uniformity of the dyeing operation and the color properties of the dyed textile material.

Claims11

Dependent claims

In an aqueous dye bath liquid suitable for the impregnating of textile material with said dye, with subsequent drying prior to the fixing of said dye, the improvement comprising the incorporation in said dye bath of a polymeric antimigration additive in an amount within the range of from about 0.05% to about 0.50% by weight, based on the total weight of said dye bath, said additive being the amine salt of poly(vinyl methyl ether/maleic acid) having the unit structural formula:

##EQU2## where x is from 0.5 to 2.0, R.sub.1, R.sub.2 and R.sub.3 each being taken from the group consisting of H, CH.sub.3, CH.sub.2 CH.sub.3, CH(CH.sub.3).sub.2, CH.sub.2 CH.sub.2 CH.sub.3, CH.sub.2 CH.sub.2 OH and CH.sub.2 CHOHCH.sub.3, with the exception that R.sub.1, R.sub.2 and R.sub.3 are not all H and that R.sub.1 and R.sub.2 together may be a divalent unit taken from the group consisting of--(CH.sub.2).sub.4-6 and (--CH.sub.2 CH.sub.2).sub.2 O, the presence of said additive serving to minimize uncontrolled dye migration to the surface of the dye-impregnated textile material during the drying of said material prior to fixing, thus enhancing the uniformity of the dyeing operation and the color properties of the dyed textile material.

Dependencies are inferred from the claim text.