Liquid crystal compounds having chiral ester head groups

Details Liquid crystal compounds having chiral ester head groups Liquid crystal compounds having chiral ester head groups

1989-06-30

1992-08-25

Stoll, Robert L.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

560 59, 560 65, 560 73, C09K 1912, C07C 6976

Patent

active

051416697

ABSTRACT:
Liquid crystal compounds which show a ferroelectric phase and which exhibit high spontaneous polarization values and smectic behavior over a range of temperatures have the formula ##STR1## wherein R.sup.1 is alkyl of from 1 to 16 carbon atoms; alkoxy; haloalkyl; alkoxyalkyl, wherein the alkoxy substituent thereof comprises a chain of carbon atoms including one or more oxygen ether atoms; or alkoxyalkoxy, wherein the alkoxy substituent thereof comprises a chain of carbon atoms including one or more oxygen ether atoms; R.sup.2 is alkyl of from 1 to 4 carbon atoms; each of R.sup.3 and R.sup.4 is alkylene; n is an integer 1 or 2; and W is alkyl of from 1 to 12 carbon atoms or fluoroalkyl of the formula ##STR2## wherein each of X, Y and Z is hydrogen or fluorine, m is zero or an integer from 1 to 6, and at least one of X, Y and Z is fluorine when m is zero.

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