Patent ID: 7795431

Claim:
A rylene of formula I, or a salt thereof, wherein X are joined to one another with formation of a six-membered ring to give a radical of the formula (b) Y are joined to one another with formation of a six-membered ring to give a radical of the formula (a) R is phenoxy, phenylthio, pyridyloxy, pyrimidyloxy, pyridylthio or pyrimidyl-thio, each of which may optionally be mono- or polysubstituted by C 1 -C 12 -alkyl, C 1 -C 12 -alkoxy and/or aryl; R′ is hydrogen or a C 1 -C 30 -alkyl whose carbon chain may, optionally, be interrupted by one or more —O— and/or —CO— moieties and which may, optionally, be mono- or polysubstituted by: C 1 -C 6 -alkoxy, cyano and/or aryl which may, optionally, be mono-or polysubstituted by C 1 -C 18 -alkyl or C 1 -C 6 -alkoxy; or phenyl, or naphthyl, or pyridyl, or pyrimidyl, each of which may be, optionally, mono or polysubstituted by: C 1 -C 18 -alkyl, C 1 -C 6 -alkoxy, halogen, cyano, nitro, —CONR 2 R 3 , —SO 2 NR 2 R 3 , or phenyl or naphthylazo, each of which may be, optionally, mono- or polysubstituted by C 1 -C 10 -alkyl, C 1 -C 6 -alkoxy and/or cyano; or C 5 -C 8 -cycloalkyl which, optionally, may be mono- or polysubstituted by C 1 -C 6 -alkyl; R 2 , R 3 are each independently hydrogen; or C 1 -C 18 -alkyl which, optionally may be mono- or polysubstituted by C 1 -C 6 -alkoxy, hydroxyl, halogen and/or cyano; or aryl or heteroaryl each of which may be, optionally, mono- or polysubstituted by C 1 -C 6 -alkyl and/or the above radicals specified as substituents for alkyl; m is 1 or 2; n is 4 when m=1; 4 or 6 when m=2.