Dyeing and printing basic dyeable textile substrates with becationic disazo and trisazo dyes having optionally further substituted 6-hydroxy-4-methyl-3-N-pyridiniumpyridone-2-coupling component radicals

Claim 2

A process for dyeing or printing a basic dyeable textile substrate comprising applying to a basic dyeable textile substrate, as a dyeing or printing agent, a bicationic disazo or trisazo dye containing 6-hydroxy-4-methyl-3-N-pyridinium or substituted pyridinium-pyrid-2-one-5 terminal coupling component radicals, the 1-position of each of which is independently unsubstituted or substituted, said dye being free of sulfo groups.

Claim 3

A process according to claim 1 wherein said basic dyeable textile substrate consists of or comprises a polymer or mixed polymer of acrylonitrile or dicyanoethylene, a synthetic polyester modified by acid groups, a polyamide modified by acid groups or a differential dyeing polyamide.

Claim 4

A process according to claim 2 wherein said basic dyeable textile substrate consists of or comprises a polyamide modified by acid groups or a differential dyeing polyamide.

Claim 5

A process according to claim 2 wherein said basic dyeable textile substrate consists of or comprises a polymer of acrylonitrile or a mixed polymer of 80-95% acrylonitrile and 5-20% vinyl acetate, vinylpridine, vinyl chloride, vinylidene chloride, acrylic acid, an acrylic acid ester, methacrylic acid, a methacrylic acid ester or asymmetrical dicyanoethylene.

Claim 6

A process according to claim 1 wherein said bicationic disazo or trisazo dye contains 6-hydroxy-4-methyl-3-[N-pyridinium, N-(n-C 1-4 alkyl)pyridinium, N-(n-C 1-4 hydroxyalkyl)pyridinium or N-(C 1-4 alkoxy)pyridinium]-pyrid-2-one-5 terminal coupling component radicals, the 1-position of each of which is independently unsubstituted or substituted by C 1-4 alkyl, C 1-4 hydroxyalkyl or --NR 3 R 4 , wherein each of R 3 and R 4 is independently n-C 1-4 alkyl.

Claim 7

A process according to claim 5 wherein said dye is a dye of the formula ##STR69## wherein R is the radical of a tetrazotizable diamino compound, each R 1 is independently hydrogen, C 1-4 alkyl, C 1-4 hydroxyalkyl or --NR 3 R 4 , wherein each of R 3 and R 4 is independently n-C 1-4 alkyl, each R 2 is independently hydrogen, n-C 1-4 alkyl, n-C 1-4 hydroxyalkyl or C 1-4 alkoxy, and each A - is an anion.

Claim 8

A process according to claim 6 wherein said dye is a dye of the formula ##STR70## wherein R is 1,4-phenylene, 2,7-fluorenylene, ##STR71## wherein Z is a direct bond, straight or branched ##STR72## wherein each R 8 is independently hydrogen or C 1-4 alkyl, x is halo, C 1-4 alkyl or C 1-4 alkoxy, y is halo, --NHCH 2 CH 2 OH or --N(CH 2 CH 2 OH) 2 , and n is 1, 2, 3 or 4, with the proviso that Z is meta or para to each --N═N-- linkage, Zo is a direct bond, --N═N--, --CH 2 -- or --CH 2 CH 2 --, R 5 is hydrogen, halo, C 1-4 alkyl or C 1-4 alkoxy, R 6 is halo, C 1-4 alkyl or C 1-4 alkoxy, and R 7 is hydrogen, C 1-4 alkyl or C 1-4 alkoxy, each R 1 is independently hydrogen, C 1-4 alkyl, C 1-4 hydroxyalkyl or --NR 3 R 4 , wherein each of R 3 and R 4 is independently n--C 1-4 alkyl, each R 2 is independently hydrogen, n--C 1-4 alkyl, n--C 1-4 hydroxyalkyl or C 1-4 alkoxy, and each A - is an anion, wherein each halo is independently fluoro, chloro or bromo.

Claim 9

A process according to claim 7 wherein each A - is a non-chromophoric anion.

Claim 10

A process according to claim 7 wherein the two R 1 's are identical, and the two R 2 's are identical.

Claim 11

A process according to claim 8 wherein said dye is a dye of the formula ##STR73## wherein Ro' is ##STR74## wherein Zy is --NH--CO-- or ##STR75## with the proviso that Zy is meta or para to each --N═N-- linkage, Zz is a direct bond, --CH 2 -- or --CH 2 CH 2 --, and each R 9 is hydrogen, chloro or methyl, with the proviso that the two R 9 's are identical, each R 1 is independently hydrogen, C 1-4 alkyl, C 1-4 hydroxyalkyl or --NR 3 R 4 , wherein each of R 3 and R 4 is independently n-C 1-4 alkyl, each R 2 is independently hydrogen, n-C 1-4 alkyl, n-C 1-4 hydroxyalkyl or C 1-4 alkoxy, and each A - is an anion.

Claim 12

A process according to claim 10 wherein the two R 1 's are identical, and the two R 2 's are identical.

Claim 13

A process according to claim 10 wherein Ro' is ##STR76##

Claim 14

A process according to claim 12 wherein said dye is a dye of the formula ##STR77## wherein Ro" is ##STR78## each R 1 ' is independently hydrogen, methyl, ethyl, 2-hydroxyethyl, 2-hydroxypropyl, 2-hydroxy-1-methylethyl or dimethylamino, each R 2 ' is independently hydrogen, methyl, methoxy or 2-hydroxyethyl, and each A - is an anion.

Claim 15

A process according to claim 13 wherein the two R 1 ''s are identical, and the two R 2 ''s are identical.

Claim 16

A process according to claim 13 wherein Ro" is ##STR79##

Claim 17

A process according to claim 15 wherein Ro" is ##STR80##

Claim 18

A process according to claim 15 wherein said dye is a dye of the formula ##STR81## wherein Ro'" is ##STR82## each R 1 " and R 2 " is independently hydrogen or methyl, and each A- is an anion.

Claim 19

A process according to claim 17 wherein the two R 1 "'s are identical, and the two R 2 "'s are identical.