Anthraquinone dyes
View Patent ↗The present invention relates to a compound of formula (I) wherein R 1 is a radical of formula (II) R 2 is —NH 2 or a radical of formula (II), R 3 and R 4 are each independently of the other hydrogen, hydroxy, —NH 2 or a radical of formula (II), R 5 is hydrogen, halogen or —X—(CH 2 ) n —Y, wherein X is a direct bond, —O— or —S—, Y is —OH or —OSO 3 H and n is a number from 0 to 6, with the proviso that at least one of the radicals R 3 , R 4 and R 5 is not hydrogen, to a process for the preparation thereof and to the use thereof in a method of producing mass-coloured plastics or polymeric colour particles.
1. A compound of formula I
wherein R 1 is a radical of formula II
R 2 is —NH 2 or a radical of formula II,
R 3 and R 4 are each independently of the other hydrogen, hydroxy, —NH 2 or a radical of formula II,
R 5 is hydrogen, halogen or —X—(CH 2 ) n —Y,
wherein X is a direct bond, Y is —OH or —OSO 3 H and n is a number 2,
with the proviso that at least one of the radicals R 3 , R 4 and R 5 is not hydrogen.
2. A compound of formula I according to claim 1 wherein Y is —OH.
3. A compound of formula I according to claim 1 wherein R 3 and R 4 are hydrogen or hydroxy.
4. A compound of formula I according to claim 1 wherein R 5 is hydrogen, chlorine or —S—(CH 2 ) 2 —OH.
5. A compound of formula I according to claim 1 according to any one of formulae I a to I c