2,6-Di:fluoro-tolan derivs. - useful as components of liq. crystal media for electro=optical displays

of formula (I) are claimed. R1, R2= 1-18C alk(en)yl, opt. with 1 or 2 non-adjacent CH2 gps. replaced by O, S, COO or OCO; one of these gps. can also = F, Cl, CN, CF3, OCF3 or OCF2H; A1, A2= 1,4-cyclohexylene, 1,4-phenylene, 2- or 3-fluoro-1,4-phenylene, 2,3-difluoro- 1,4-phenylene, 2,6- or 3,5-diflu...

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Bibliographische Detailangaben
Hauptverfasser:	REIFFENRATH, VOLKER, PLACH, HERBERT
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	ADHESIVES CHEMISTRY DYES MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS POLISHES
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Beschreibung
Zusammenfassung:	of formula (I) are claimed. R1, R2= 1-18C alk(en)yl, opt. with 1 or 2 non-adjacent CH2 gps. replaced by O, S, COO or OCO; one of these gps. can also = F, Cl, CN, CF3, OCF3 or OCF2H; A1, A2= 1,4-cyclohexylene, 1,4-phenylene, 2- or 3-fluoro-1,4-phenylene, 2,3-difluoro- 1,4-phenylene, 2,6- or 3,5-difluorophenylene, dioxan-2,5-diyl, pyridine-2,5-diyl or pyrimidine-2,5-diyl; Z1, Z2= -CH2CH2-, -(CH2)4-, -CH2O-, -OCH2-, -CC- or a single bond; m, p = 0, 1 or 2; o= 0, 1 or 2.