Alkenylcyclohexane liquid crystalline compounds

Details Alkenylcyclohexane liquid crystalline compounds Alkenylcyclohexane liquid crystalline compounds

1991-08-19

1994-03-08

Tucker, Philip

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229963, 25229901, 544242, 546346, 570127, 570182, C09K 1934, C09K 1930, C07D23900, C07D21172

Patent

active

052924521

ABSTRACT:
Compounds of the formula ##STR1## wherein Z.sup.1 denotes a single covalent bond or --CH.sub.2 Ch.sub.2 --; ring A.sup.1 represents 1,4-phenylene, pyrimidine-2,5-diyl, pyridine-2,5-diyl or, when Z.sup.1 stands for --CH.sub.2 CH.sub.2 --, also trans-1,4-cyclohexylene; X.sup.1 stands for fluorine or chlorine; X.sup.2 signifies fluorine, chlorine or hydrogen, with the proviso that X.sup.2 only signifies hydrogen when X.sup.1 is chlorine or when ring A.sup.1 signifies pyridine-2,5-diyl and Z.sup.1 signifies --CH.sub.2 CH.sub.2 --; and R.sup.1 signifies 1E-alkenyl with 2 to 12 carbon atoms,
their manufacture, liquid crystalline mixtures which contain these compounds and their use for electro-optical purposes.

REFERENCES:
patent: 4676604 (1987-06-01), Petrzilka
patent: 4770503 (1988-09-01), Buchecker et al.
patent: 4877547 (1989-10-01), Weber et al.
patent: 4886621 (1989-12-01), Sage et al.
patent: 4917819 (1990-04-01), Goto et al.
patent: 5013477 (1991-05-01), Buchecker et al.
patent: 5055224 (1991-10-01), Sage et al.
patent: 5122295 (1992-06-01), Weber et al.
Derwent Abstract of DE 4 025 550 No. 91-059126/09.

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