3,4,5-trifluorobenzenes, and their use in liquid-crystal mixtures

PCT No. PCT/EP94/03212 Sec. 371 Date Apr. 4, 1996 Sec. 102(e) Date Apr. 4, 1996 PCT Filed Sep. 26, 1994 PCT Pub. No. WO95/10498 PCT Pub. Date Apr. 20, 1995A 3,4,5-trifluorobenzene derivatives of formula (I): (I) in which R1 is a straight-chain or branched alkyl having 1 to 15 carbon atoms in which o...

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Hauptverfasser:	SCHLOSSER, HUBERT, JUNGBAUER, DIETMAR
Format:	Patent
Sprache:	eng
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS 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 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:	PCT No. PCT/EP94/03212 Sec. 371 Date Apr. 4, 1996 Sec. 102(e) Date Apr. 4, 1996 PCT Filed Sep. 26, 1994 PCT Pub. No. WO95/10498 PCT Pub. Date Apr. 20, 1995A 3,4,5-trifluorobenzene derivatives of formula (I): (I) in which R1 is a straight-chain or branched alkyl having 1 to 15 carbon atoms in which one or two nonadjacent -CH2-groups are optionally replaced by -O-, -CH=CH-, -C 3BOND C-, cyclopropane-1,2-diyl or -Si(CH3)2-, and in which one or more H atoms in the alkyl radical may be substituted by F; A1, A2 and A3 are identical or different 1,4-phenylene, pyridine-2,5-diyl, pyrimidine-2,5-diyl in which one or two H atoms are, optionally, replaced by F, trans-1,4-cyclohexylene, 1,3-dioxane-2,5-diyl or naphthalene-2,6-diyl, M1 and M2 are identical or different -CH2CH2-,-CH=CH-,-C 3BOND C-,-CH2CH2CH2CH2-, -CH2-O-,-O-CH2-,-CO-O- or-O-CO; X is -CH2-O-,-OCH2- or -O-CO-; and k, l, m, n, o and p are zero or one provided that the sum k+m+o is greater than zero. The substances of the invention are characterized by a good temperature behavior of the nematic phase and good solubility.