Coloration process
AssigneeImperial Chemical Industries PLC
InventorsSusan M. Bostock, Violet Boyd, Brian R. Fishwick, Brian Glover, Stewart R. Korn
Life of this patent
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Abstract
Process for the continuous coloration of aromatic polyester or cellulose triacetate textile materials and of unions of aromatic polyester with cellulose, by applying to the textile material for the polyester or triacetate a disperse azo dyestuff containing a single carboxylic acid ester group and at least one group selected from primary, secondary or tertiary sulphamoyl or carbamoyl; imido (especially phthalimido), hydroxy, acyloxy, sulphone (especially alkylsulphonyl) and lactone groups, and for the cellulose component of a union a reactive or other dyestuff, followed by an alkaline rinse of the colored textile material.
Claims10
A process for the continuous colouration of aromatic polyester or cellulose triacetate textile materials which comprises continuously applying to the said textile materials by an aqueous padding or printing process and fixing by a heat treatment a disperse azo dyestuff, free from carboxylic acid and sulphonic acid groups, which is represented by the formula:
- A--N.dbd.N--E
- wherein A is the residue of a diazotisable aromatic amine A--NH.sub.2 and E is the residue of a coupling component which is an aromatic or heterocyclic amine, an aromatic hydroxy compound, a pyrazolone or an active aliphatic methylene compound, each dyestuff containing a single carboxylic ester group and at least one of the following:
- (a) a primary, secondary or tertiary sulphamoyl group;
- (b) a primary, secondary or tertiary carbamoyl group;
- (c) an imido group;
- (d) a hydroxy group;
- (e) a sulphone group
- (f) a lactone group;
- and subsequently giving the coloured textile material a treatment in an aqueous alkaline bath at a pH above 8 and at a temperature between 50.degree. and 85.degree. C. which does not contain a reducing agent.
Dependencies are inferred from the claim text.