Polymerfarbstoff und Verfahren zu dessen Herstellung sowie deren Verwendung in Leuchtdioden und anderen optischen Bauelementen

Die vorliegende Erfindung betrifft Polymerfarbstoffe auf der Basis von Dicyanomethylen (DCM) sowie dessen Herstellung. Diese Polymerfarbstoffe finden Verwendung als rot-emittierende Schichten in organischen, optischen Bauelementen, insbesondere in Leuchtdioden.

WO2003018711 A UPAB: 20030723 NOVELTY - New polymer dyes are based on a 4-dicyanomethylene-pyran compound (I), which has a 4-N-(polymer)-amino-styryl substituent in the 2- and/or 6-position(s), in which the polymer skeleton is e.g. polyester, polyamide, polyurea or polyurethane. DETAILED DESCRIPTION - New polymer dyes are based on a 4-dicyanomethylene-pyran compound of formula (I); R2, R3 = a group of formula (II) in at least one case, otherwise H, linear, branched or cyclic 1-20 C alkyl or alkoxy or aryl: R1, R4, R5, R6, R7 = H or linear, branched or cyclic 1-20 C alkyl or alkoxy groups; R1R2, R4R7 and/or R5R6 may = a carbocyclic bridge; R6 and/or R7 = a polymer skeleton, e.g. polyester, polyamide, polyurea or polyurethane. An INDEPENDENT CLAIM is also included for the preparation of (I) by: (a) condensing a 2-(pyran-6-yl)-malonodinitrile (III) with an aminobenzaldehyde (IV); and (b) reacting the intermediate 2-(4-aminostyryl)-pyran (V) with a comonomer, e.g. dicarboxylic acid, acid chloride or anhydride or diisocyanate, to form (I). USE - Polymer dyes (I) are used for producing organic optical devices, e.g. light-emitting diodes (OLEDs) (all claimed). They are useful as red-emitting layers in these devices. ADVANTAGE - The emission maximum of (I) is in the red region of the spectrum and (I) are easily processed.