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
• Published: 26.12.2019
• 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

The present invention relates to a color converter comprising (a)a polyethylene terephthalate matrix material;and (b)at least one organic fluorescent dye selected from a compound of formulae (I.a), (I.b), (I.c) or mixtures thereof wherein 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. The invention also relates to a backlight unit, a liquid crystal display module and a light emitting device comprising this color converter. The invention also relates to novel compounds of formula (l.b), wherein EWG1 = EWG2 = CN. La présente invention concerne un convertisseur de couleur comprenant (a) un matériau de matrice de polyéthylène téréphtalate ; et (b) au moins un colorant fluorescent organique choisi parmi un composé des formules (I.a), (I.b), (I.c) ou leurs mélanges, EWG1 et EWG2, étant un groupe CN, CH(O), C(O)R13, OC(O)R13, COOR14, CH(COOR14)2, SO2R14, C(O)NR15R16, SO2NR15R16 ou un fluoroalkyle en C1-C20 ; R1, R2, R3, R4, R5, R6, R7a, R7b, R7c, R13, R14, R15 et R16 étant tels que définis dans les revendications et dans la description. L'invention concerne également une unité de rétroéclairage, un module d'affichage à cristaux liquides et un dispositif électroluminescent comprenant ce convertisseur de couleur. L'invention concerne également de nouveaux composés de formule (l.b), dans laquelle EWG1 = EWG2 = CN.