Biphenyl esters and liquid crystal materials and devices contain

Details Biphenyl esters and liquid crystal materials and devices contain Biphenyl esters and liquid crystal materials and devices contain

1988-06-09

1990-08-28

Gron, Teddy S.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229901, 25229964, 25229965, 350350R, 3503505, 560 59, 560 73, 560 60, 560102, 560108, G02F 110, C09K 1920, C09K 1930, C07C 6976

Patent

active

049523376

ABSTRACT:
Biphenyl egters of formula (I), ##STR1## wherein formula (II) represents formula (III) or formula (IV), R.sub.1 represents C.sub.3 -C.sub.12 alkyl, alkoxy, alkylcarbonyloxy, alkoxycarbonyl or alkoxycarbonyloxy, j is O or 1 R.sub.2 represents C.sub.3 -C.sub.12 alkyl or alkoxy, one of Q.sub.1 or Q.sub.2 is fluorine and the other is hydrogen, provided that when j is O and formula (II) is formula (III) and both R.sub.1 and R.sub.2 are n-alkyl, then the total number of carbon atoms in R.sub.1 and R.sub.2 is more than 12. These compounds may be used as constituents of liquid crystal mixtures which show a room temperature ferroelectric smectic phase, and a number of such mixtures are described.

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