Reactive Azo Dyes, Methods for the Production Thereof and Their Use

A reactive dye of formula (1)

• wherein
• D is the radical of a diazo component of the benzene or naphthalene series, a heterocyclic radical, or the radical of a monoazo or diazo dye;
• R1 is C1 to C4 alkyl;
• R2 is cyano, carbamoyl, or sulfomethyl;
• R3, R4, and R5
• are, independently of one another, hydrogen, C1 to C18 alkyl, or C4 to C7 cycloalkyl, wherein said alkyl and cycloalkyl is optionally substituted by hydroxyl, sulfo, sulfato, or vinylsulfonyl and wherein, except for methyl, one or more nonadjacent carbon atoms is optionally replaced by oxygen or NR7, or R3 and R4 are part of heterocyclic groups;
• R7 is hydrogen or C1 to C4 alkyl;
• Q is C1 to C18 alkylene optionally substituted by C1 to C4 alkyl, halogen, or hydroxyl and wherein, except for methylene, one or more nonadjacent carbon atoms is optionally replaced by oxygen or NR7;
• n is 0 or 1;
• Ar is a phenylene or naphthylene radical optionally substituted by sulfo, carboxyl, C1 to C4 alkyl, C1 to C4 alkoxy, or halogen;
• and
• Y is —CH═CH2 or —CH2CH2Y1, wherein Y1 is hydroxyl or a group which can be eliminated under the action of alkali.

A diaminopyridine of formula (2):

• wherein
• R1 is C1 to C4 alkyl;
• R2 is cyano, carbamoyl, or sulfomethyl;
• R3, R4, and R5
• are, independently of one another, hydrogen, C1 to C18 alkyl, or C4 to Cal cycloalkyl, wherein said alkyl or cycloalkyl is optionally substituted by hydroxyl, sulfo, sulfato, or vinylsulfonyl, and wherein, except for methyl, one or more nonadjacent carbon atoms is optionally replaced by oxygen or NR7, or R3 and R4 are part of heterocyclic groups;
• R7 is hydrogen or C1 to C4 alkyl;
• Q is C1 to C18 alkylene optionally substituted by C1 to C4 to alkyl, halogen, or hydroxyl and wherein, except for methylene, one or more nonadjacent carbon atoms is optionally replaced by oxygen or NR7,
• n is 0 or 1;
• Ar is a phenylene or naphthylene radical optionally substituted by sulfo, carboxyl, C1 to C4 alkyl, C1 to C4 alkoxy, or halogen;
• and
• Y is CH═CH2 or —CH2CH2Y1, wherein Y1 is hydroxyl or a group which can be eliminated under the action of alkali.