Polyphenyl-based ester compounds and liquid crystal compositions

Details Polyphenyl-based ester compounds and liquid crystal compositions Polyphenyl-based ester compounds and liquid crystal compositions

1989-10-06

1992-03-31

Maples, John S.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229901, 25229966, 25229967, 558270, 558271, 558273, 560 59, 560 65, 560 66, 560 83, 560 86, 560102, 560108, 359104, C09K 1912, C09K 1952, C07C 6976, C07C 6996

Patent

active

051005794

ABSTRACT:
Polyphenyl-based liquid crystal compounds represented by the following general formula (1) and liquid crystal composition containing the same: ##STR1## wherein R.sup.1 represents a straight or branched C.sub.1-18 alkyl group, haloalkyl group, aralkyl group or haloaralkyl group with or without optically active carbon, R.sup.2 represents a straight or branched C.sub.1-6 alkyl group, haloalkyl group or aralkyl group with or without optically active carbon, W represents (1) --OCO-- or --COO--, in which case T represents a halogen atom or a methyl group, or (2) a single bond, --O-- or --OCOO--, in which case T represents a halogen atom, X represents --OCO--, --COO--, --C.dbd.C--, --CH.dbd.N--, --N.dbd.CH, Y represents single bond, --O--, --COO--, --OCO--, --CH.sub.2 --, --OCH.sub.2 --, --COOCH.sub.2 -- or --OCOCH.sub.2 --, Z.sub.1 and Z.sub.2 represents a hydrogen or halogen atom, a cyano group or nitro group, Z.sub.1 may be the same or different from Z.sub.2, l and m are one or more than one each and a total of l and m is three or more than three, the carbon atom marked with * is an asymmetric carbon atom.

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