Patent ID: 7655767
Filing Date: 2010-02-02
Classification: C09B,G11B,Y10S

Abstract:
1. An optical layer comprising at least one dye compound of formula (I) or (II) wherein R1 is a linear or branched C R2 to R5 independently of one another, are hydrogen, cyano (—CN), halogen, nitro (NO CX3 where X is chlorine, fluorine or bromine; C R2 and R3, or R4 and R5, form a saturated or unsaturated homocyclic or heterocyclic five-membered or six-membered ring optionally containing oxygen or an additional nitrogen as a ring member; or wherein, for formula (II) R2 and R3, R4 and R5, or R3 and R4 form a saturated or unsaturated homocyclic or heterocyclic five-membered or six-membered ring optionally containing oxygen or an additional nitrogen as a ring member; R6 and R7 independently of one another, are hydrogen, cyano (—CN), halogen, nitro (NO CX linear or branched C C R6 and R7 form a homocyclic six-membered ring to give a compound of formula (I) or (II) represented by formula (III) or (IV) wherein R10-R13 independently of one another represent hydrogen, cyano (—CN), halogen, nitro (NO CX3 where X is chlorine, fluorine or bromine; C An- is an anionic azo metal complex of the following formula