Process for dyeing aminated cellulose/polyester blend fabric with fiber-reactive disperse dyestuffs

A process for dyeing fiber materials comprising cellulose fibers or a mixture of cellulose fibers and polyester fibers, which comprises first modifying the fiber material with one or more compounds containing amino groups and then dyeing the modified fiber material with a fiber-reactive disperse dyestuff in supercritical CO.sub.2 at a temperature of 70-210 degrees centigrade and a CO.sub.2 pressure of 30-400 bar, wherein the compound containing amino groups corresponds to the formula (1a) or (1b) ##STR43## in which:

• Y is an ester group;
• A and N together with 1 or 2 alkylene groups having 1 and 4 carbon atoms form the bivalent radical of a 5- or 6-membered heterocyclic ring, in which
• A is an oxygen atom or a group of the formula (a), (b) or (c) ##STR44## in which R is a hydrogen atom or an amino group, or an alkyl group having 1 to 6 carbon atoms, which is optionally substituted by 1 or 2 substituents from the group consisting of amino, sulfo, hydroxyl, sulfato, phosphato and carboxyl, or is an alkyl group having 3 to 8 carbon atoms, which is interrupted by 1 or 2 hetero groups chosen from the groups --O-- and --NH-- and is optionally substituted by an amino, sulfo, hydroxyl, sulfato or carboxyl group,
• R.sup.1 is hydrogen, methyl or ethyl,
• R.sup.2 is hydrogen, methyl or ethyl and
• Z.sup.(-) is an anion;
• B is the amino group of the formula H.sub.2 N- or an amino or ammonium group of the formula (d) or (e) ##STR45## in which R.sup.1, R.sup.2 and Z.sup.(-) has one of the abovementioned meanings and
• R.sup.3 is methyl or ethyl and
• R.sup.4 is hydrogen, methyl or ethyl;
• p is the number 1 or 2;
• alkylene is a straight-chain or branched alkylene radical having 2 to 6 carbon atoms, which is optionally substituted by 1 or 2 hydroxyl groups, or is a straight-chain or branched alkylene radical having 3 to 8 carbon atoms, which is interrupted by 1 or 2 hetero groups chosen from the groups --O-- and --NH--;
• alk is a straight-chain or branched alkylene radical having 2 to 6 carbon atoms, or is a straight-chain chain or branched, alkylene radical having 3 to 8 carbon atoms, which is interrupted by 1 or 2 hetero groups chosen from the groups --O-- and --NH--,
• m is the number 1 or 2;
• n is a number from 1 to 4 ;
• and
• the amino, hydroxyl and ester groups can be bonded either to a primary, secondary or tertiary carbon atom of the alkylene radical.