Process for coloring aromatic polyester-cellulose unions with a reactive dyestuff and a disperse dyestuff containing at least two carboxylic acid ester groups
AssigneeImperial Chemical Industries PLC
InventorsBrian Ribbons Fishwick, Violet Boyd, Brian Glover
Life of this patent
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Abstract
An improved process for the continuous coloration of aromatic polyester/cellulose unions which comprises continuously applying to the said unions a reactive dyestuff and a disperse dyestuff containing at least two carboxylic acid ester groups, fixing the dyestuffs on the union, and thereafter subjecting the colored union to a treatment in an aqueous alkaline bath at a pH above 8.0 and at a temperature between 50.degree. and 85.degree. C, whereby the unions are padded or printed in a wide variety of shades possessing excellent fastness properties and there is little or no staining of any unprinted areas of the unions.
Claims8
An improved process for the continuous coloration of aromatic polyester/cellulose unions which comprises continuously applying to the said unions a reactive dyestuff and a disperse dyestuff which is free from sulphonic acid and carboxylic acid groups and which contains at least two carboxylic acid ester groups, fixing the dyestuffs on the union, and thereafter subjecting the colored union to a treatment in an aqueous alkaline bath at a pH above 8.0 and at a temperature between 50.degree. and 85.degree. C.
Dependencies are inferred from the claim text.