Liquid crystal composition

Details Liquid crystal composition Liquid crystal composition

1995-12-15

1997-11-04

Kelly, C. H.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229963, 25229966, C09K 1934, C09K 1930, C09K 1912

Patent

active

056836244

ABSTRACT:
A LC material for TN and STN modes having a comparatively high .DELTA.n and a low viscosity is provided by a LC composition comprising a first component (formula I-c), a second component (formula II-c) and a third component (formula III or IV): ##STR1## wherein R.sup.1 is C.sub.1-10 alkyl; R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are C.sub.1-10 alkyl or C.sub.2-10 alkenyl in which alkyl and alkenyl groups one or two non-adjacent methylenes may be replaced by --O--; R.sup.6 is C.sub.1-10 alkyl, alkoxy or alkoxymethyl; Z.sup.1 and Z.sup.3 are --CH.sub.2 CH.sub.2 --, --COO-- or a single bond; Z.sup.2 is --C.tbd.C--, --COO--, --CH.sub.2 CH.sub.2 -- or a single bond; Z.sup.4 is --C.tbd.C--, --COO-- or a single bond; Q.sup.1 is H or F; A.sup.2, B, C and E are trans-1,4-cyclohexylene or 1,4-phenylene; D is trans-1,4-cyclohexylene or 1,4-phenylene in which H(s) at 2- or 3-position may be replaced by F(s); and 1 is 0 or 1.

REFERENCES:
patent: 5516454 (1996-05-01), Scheuble et al.
patent: 5534187 (1996-07-01), Miyazawa et al.
patent: 5534189 (1996-07-01), Nakagawa et al.
patent: 5543077 (1996-08-01), Rieger et al.
patent: 5560865 (1996-10-01), Nakagawa et al.
patent: 5565140 (1996-10-01), Hittich et al.

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