EXTRUDED PET FILMS WITH PHOTOSTABLE DYES FOR COLOR CONVERSION

• Main Authors: KOENEMANN, Martin, MANGOLD, Hannah Stephanie, IVANOVICI, Sorin, INDERBITZIN, Bruno, PAGANO, Sandro
• Format: Patent
• Language: English; French; German
• Published: 10.08.2022
• Subjects: ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAININGELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN,SULFUR, SELENIUM OR TELLURIUM; ADHESIVES; CHEMISTRY; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; DYES; FREQUENCY-CHANGING; LAKES; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; MORDANTS; NATURAL RESINS; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICAL LOGIC ELEMENTS; OPTICS; ORGANIC CHEMISTRY; ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES; PAINTS; PHYSICS; POLISHES; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

A color converter may include (a) a polyethylene terephthalate matrix material; and (b) an organic fluorescent dye selected from a compound of formulae (I.a), (I.b), (I.c) or mixtures thereofwherein EWG1 and EWG2 are CN, CH(O), C(O)R13, OC(O)R13, COOR14, CH(COOR14)2, SO2R14, C(O)NR15R16, SO2NR15R16, or C1-C20-fluoroalkyl; R1, R2, R3, R4, R5, R6, R7a, R7b, R7c, R13, R14, R15 and R16 are as defined in the claims and in the description. A backlight unit, a liquid crystal display module, and a light emitting device may include such a color converter. In compounds of formula (I.b) EWG1 and EWG2 may be CN.