US 4,226,596 AGranted

Process for printing unions

AssigneeRohner AG Pratteln

InventorsRichard Peter, Hans D. Kirner, Rolf Gehrlein

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Abstract

The unions consist of a mixture of fibers which can be colored with disperse dyestuffs and fibers which can be colored with reactive dyestuffs. A printing paste containing: (a) at least one finely dispersed, water-insoluble azo dye-stuff of the formula: ##STR1## (b) at least one reactive dyestuff and (c) at least one non-ionic surfactant is used. The azo dyestuff of formula I is not prepared in the printing paste. It has a melting point between 220.degree. and 300.degree. C. In the formula, A, D and R have the meanings given in claim 1. In this way, prints are obtained, from which the non-fixed dyestuffs can easily be washed out and which have an excellent white ground. The build-up and fastness properties are good. The prints are very brilliant and deep in color, in particular in the field of orange and red shades.

Claims17

Dependent claims

A process for printing unions consisting of mixtures of fibers which can be coloured with disperse dyestuffs and fibers which can be coloured with reactive dyestuffs, characterized by using a printing paste containing at least one finely dispersed, water-insoluble azo dyestuff of the formula:

##STR34## which is not prepared in the printing paste and which has a melting point between 220.degree. and 300.degree. C. and wherein D is a phenyl radical free from sulfo and carboxyl groups and bearing at least one electrophilic substituent and optionally up to two low molecular weight alkyl and/or alkoxy groups, R is hydrogen, a halogen atom or an optionally substituted alkoxy group and A is a phenyl radical which can be substituted by one or two optionally substituted alkyl and/or alkoxy groups and/or one halogen atom as well as at least one reactive dyestuff at least one non-ionic surfactant, and by applying the printing paste to the unions in a manner known per se.

Dependencies are inferred from the claim text.