Patent ID: 7408061
Filing Date: 2008-08-05
Classification: C09B

Abstract:
1. A rylene dye of the general formula I where the variables are defined as follows: R C C aryl or hetaryl which may each be mono- or polysubstituted by C R′ is bromine; cyano; —NR aryloxy, arylthio, hetaryloxy or hetarylthio, each of which may be mono- or polysubstituted by C C R R R X, Y are both hydrogen or bonded together to form a six-membered ring in a radical of the formula Ia where X is the —NH— group and Y is the other free chemical bond; n is 2, 3, 4 or additionally 1 when X and Y are a radical of the formula Ia; n′ is from 1 to 4; m is from 0 to 6.