LIQUID-CRYSTAL COMPOUNDS BEARING VINYL LINKAGES AND LIQUID-CRYSTAL COMPOSITION

Title:

LIQUID-CRYSTAL COMPOUNDS BEARING VINYL LINKAGES AND LIQUID-CRYSTAL COMPOSITION

Document Type and Number:

WIPO Patent Application WO/1997/019042

Kind Code:

A1

Abstract:

Liquid-crystal compounds exhibiting a liquid-crystal phase over a wide temperature range and having a low viscosity, a high refractive anisotropy and a high elastic constant ratio (K33/K11); a liquid-crystal composition containing at least one of these compounds; and a liquid-crystal display element made by using this composition. The liquid-crystal compounds are represented by general formula (1), wherein R is C1-C10 alkyl or C2-C10 alkenyl; R'is C1-C10 alkyl, C2-C10 alkenyl, F, C1, CN, OCF3, CF3, OCF2H, CF2H or CFH2; and A1 and A2 are each independently trans-1,4-cyclohexylene, 1,4-phenylene wherein one or more of the hydrogen atoms on the 6-membered ring may be replaced by halogen, or a single bond, each of the elements constituting the compound being optionally replaced by an isotope thereof.

Inventors:

KATO TAKASHI (JP)
MATSUI SHUICHI (JP)
MIYAZAWA KAZUTOSHI (JP)
HACHIYA NORIHISA (JP)
NAKAGAWA ETSUO (JP)

Application Number:

PCT/JP1996/003358

Publication Date:

May 29, 1997

Filing Date:

November 15, 1996

Export Citation:

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Assignee:

CHISSO CORP (JP)
KATO TAKASHI (JP)
MATSUI SHUICHI (JP)
MIYAZAWA KAZUTOSHI (JP)
HACHIYA NORIHISA (JP)
NAKAGAWA ETSUO (JP)

International Classes:

C07C13/28; C07C15/52; C07C43/192; C07C43/225; C07C255/46; C07C255/50; C09K19/30; (IPC1-7): C07C13/28; C07C22/00; C07C25/24; C07C43/192; C07C43/225; C07C255/46; C07C255/50; C09K19/30; G02F1/13

Domestic Patent References:

WO1995030723A1

1995-11-16

Other References: