Patent ID: 6815536
Filing Date: 2004-11-09
Classification: C09B

Abstract:
A monoazo reactive red dyestuff of formula (I), wherein: X is â€”NHCN, â€”OH, â€”SCH2COOH, â€”NHSO2CH3, 3-carboxypyridinium, â€ƒor halogen; D is a phenyl having 0 to 3 substituent groups, said substituent groups are selected from the group consisting of halogen, C1-4 alkyl, C1-4 alkoxyl, nitro, amino, hydroxyl, carboxyl, phosphonic acid and sulfo group; Z is â€”SO2â€”CH&boxH;CH2 or SO2â€”CH2â€”CH2â€”U; U is â€”OSO3H, Cl, Br, â€”OPO3H2, â€”SSO3H or R2 is sulfo, carboxy, halogen or C1-4 alkoxy; n is 1; when X is a halogen atom, R1 is limited to a hydrogen atom and R3 is limited to C1-4 alkyl or C1-4 alkyl having at least one substituent; when X is â€”NHCN, â€”OH, â€”SCH2COOH, â€”NHSO2CH3, 3-carboxypyridinium or â€ƒR1 and R3 independently can be any group selected from hydrogen atom, C1-4 alkyl, phenyl, â€ƒor C1-4 alkyl having one or more substituent group selected from hydroxyl, carboxyl, sulfo, carbamoyl or methoxy carbonyl.