FLUORINATED BENZO[C]CHROMENE IN LIQUID CRYSTAL MIXTURE AND USE OF THEM

PROBLEM TO BE SOLVED: To provide a new component used for a nematic, cholesteric or chiral smectic liquid crystal mixture, having a high absolute value in dielectric anisotropy and a preferable ratio of viscosity vs. transparent point as combined with the above. SOLUTION: This fluorinated benzo[c]ch...

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Hauptverfasser:	SCHMIDT WOLFGANG DR, HORNUNG BARBARA, WINGEN RAINER
Format:	Patent
Sprache:	eng
Schlagworte:	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 HETEROCYCLIC COMPOUNDS MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS NON-LINEAR OPTICS OPTICAL ANALOGUE/DIGITAL CONVERTERS OPTICAL LOGIC ELEMENTS OPTICS ORGANIC CHEMISTRY PAINTS PHYSICS POLISHES TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF
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Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a new component used for a nematic, cholesteric or chiral smectic liquid crystal mixture, having a high absolute value in dielectric anisotropy and a preferable ratio of viscosity vs. transparent point as combined with the above. SOLUTION: This fluorinated benzo[c]chromene is a compound expressed by the formula [wherein, R1, R2are each independently H, a 1-16C straight chain or branched alkyl or the like, wherein, 1 or ≥2 non-adjacent and non-terminal CH2group can be replaced by O, C(=O) or the like, one CH2group can be replaced by C≡C or the like and 1 or ≥2 H can be replaced by F or the like; G is CH2, CF2or C(=O); and X1, X2are each independently H or F, provided that at least one of X1, X2must be F, and also R1, R2can not be H at the same time]. COPYRIGHT: (C)2005,JPO&NCIPI