Disazo dyestuffs

Details Disazo dyestuffs Disazo dyestuffs

1999-03-19

2000-02-29

Powers, Fiona T.

Organic compounds -- part of the class 532-570 series

Organic compounds

Azo

534887, 8527, 8681, 8919, C09B 35037, C09B 4300, D06P 139

Patent

active

060310839

ABSTRACT:
The new disazo dyestuffs of the formula (I) ##STR1## wherein the substituents and the indices have the meanings given in the description,
wherein more than 25 equivalent % of all the M cations in the molecule are alcohol ammonium radicals of the formula .sup..sym. NR.sub.1 R.sub.2 R.sub.3 R.sub.4 wherein
R.sub.1, R.sub.2, R.sub.3 and R.sub.4 independently of one another represent hydrogen, C.sub.1 -C.sub.4 -alkyl and C.sub.2 -C.sub.4 -hydroxyalkyl, with the proviso that at least one of the radicals R.sub.1 -R.sub.4 denotes C.sub.2 -C.sub.4 -hydroxyalkyl,
are excellently suitable for dyeing cellulose-containing materials, and in particular paper, and are distinguished by high degrees of fastness.

REFERENCES:
patent: 4808192 (1989-02-01), Narita et al.
patent: 4988805 (1991-01-01), Kunde
patent: 5288294 (1994-02-01), Kaser
patent: 5565102 (1996-10-01), Brandt et al.
patent: 5808016 (1998-09-01), Kunde

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