Patent ID: 6486319
Filing Date: 2002-11-26
Classification: C09B

Abstract:
A thermochromic rylene dye of formula I whereR is hydrogen or C1-C30-alkyl, whose carbon chain may be interrupted by one or more â€”Oâ€”, â€”Sâ€”, â€”NR1â€”, â€”COâ€” and/or â€”SO2â€” groups and which may be monosubstituted or polysubstituted by cyano, C1-C6-alkoxy, aryl, which may be substituted by C1-C18-alkyl or C1-C6-alkoxy, or a 5- to 7-membered heterocyclic radical which is bonded via a nitrogen atom and may contain further heteroatoms and may be aromatic; C5-C8-cycloalkyl, whose carbon skeleton may be interrupted by one or more â€”Oâ€”, â€”Sâ€” and/or â€”NR1â€” groups and which may be monosubstituted or polysubstituted by C1-C6-alkyl; aryl or hetaryl, each of which may be monosubstituted or polysubstituted by C1-C18-alkyl, C1-C6-alkoxy, cyano, â€”CONHR2, â€”NHCOR2 and/or aryl- or hetarylazo, each of which may be substituted by C1-C10-alkyl, C1-C6-alkoxy or cyano, where Râ€² is C2-C30-alkyl, whose carbon chain may be interrupted by one or more â€”Oâ€” and/or â€”COâ€” groups and which may be monosubstituted or polysubstituted by cyano, C1-C6-alkoxy, C5-C8-cycloalkyl, whose carbon skeleton may be interrupted by one or more â€”Oâ€”, â€”Sâ€” and/or â€”NR1â€” groups and which may be C1-C6-alkyl-substituted, aryl, which may be substituted by C1-C18-alkyl or C1-C6-alkoxy, or a 5- to 7-membered heterocyclic radical which is bonded via a nitrogen atom and which may contain further heteroatoms and which may be aromatic; methyl, which is monosubstituted or disubstituted by aryl, hetaryl and/or C5-C8-cycloalkyl, each of which may be substituted by C1-C18-alkyl or C1-C6-alkoxy; C5-C8-cycloalkyl, whose carbon skeleton may be interrupted by one or more â€”Oâ€”, â€”Sâ€” and/or â€”NR1â€” groups and which may be monosubstituted or polysubstituted by C1-C6-alkyl; R1 is hydrogen or C1-C6-alkyl; R2 is hydrogen; C1-C18-alkyl; aryl or hetaryl, each of which may be substituted by C1-C6-alkyl, C1-C6-alkoxy or cyano; n is 0 or 1.