Patent ID: 6464768
Filing Date: 2002-10-15
Classification: C09B,C09D

Abstract:
A dye of the formula (I) in whichR1 is hydrogen, alkyl of 1 to 4 carbon atoms, or alkoxy of 1 to 4 carbon atoms; R2 is hydrogen, carboxyl, chloro or nitro; R21 is hydrogen; or R2 and R21 together form a benzene ring which is fused on in positions 3 and 4 of the ring A and optionally carries 1, 2 or 3 sulfo groups; m is a number from 0 to 1; n is a number from 0 to 2; M+ is a cation or a mixture of different cations, at least one equivalent of the cations M+ per mole of the dye being lithium cations, cations of the formula (II) where p is a number from 1 to 30; or a combination thereof; X is CH2CH2, CH(CH3)CH2, CH2CH(CH3) or a combination thereof and R3, R4 and R5 independently of one another are hydrogen, a group of the formula (III) â€ƒâ€”(â€”Xâ€”Oâ€”)pHâ€ƒâ€ƒ(III)or an aliphatic radical of 1 to 18 carbon atoms.