Liquid crystalline compounds containing hydrocarbon groups, liqu

Details Liquid crystalline compounds containing hydrocarbon groups, liqu Liquid crystalline compounds containing hydrocarbon groups, liqu

1998-02-26

2000-01-18

Kelly, C. H.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229966, 25229961, 568626, 568647, 585 25, C09K 1930, C09K 1912, C09K 1934, C07C 1512

Patent

active

060155086

ABSTRACT:
Disclosed are (A) a liquid crystalline compound of the general formula: ##STR1## wherein X.sub.1 stands for a hydrogen atom, cyano group, a halogen atom, or an alkyl group with 1-20 carbon atoms, and one or more methylene groups in the alkyl group may be replaced by --CH.dbd.CH--, --.tbd.C--, or oxygen atoms and one or more hydrogen atoms may be substituted by halogen atoms; X.sub.2 stands for a hydrogen atom, an alkyl group with 1-10 carbon atoms, or a substituent of --(A.sub.4 --Z.sub.4).sub.s --A.sub.6 --X.sub.3 ; l, m, n and s each stands for an integer of 0 or 1, and p, and q each stands for an integer of 0-5; X.sub.3 for an alkyl group with 1-10 carbon atoms; Z.sub.1 -Z.sub.4 each independently stands for a covalent bond or an alkylene group with 1-5 carbon atoms, and one or more methylene groups in the alkylene group may be replaced by --CH.dbd.CH--, --C.tbd.C--, or an oxygen atom and one or more hydrogen atoms i the alkylene group may be substituted by halogen atoms; the ring A.sub.1 -A.sub.6 each independently stands for a 1,4-phenylene, a 1,4-cyclohexenylene, or a trans-1,4-cyclohexylene, and the carbon atoms in the ring may be replaced by nitrogen atoms or oxygen atoms and the hydrogen atoms in the ring may be substituted by halogen atoms or cyano groups; and B.sub.1 and B.sub.2 each independently stands for --CH.dbd.CH-- or --C.tbd.C--, with the proviso that both of B.sub.1 and B.sub.2 should not be --CH.dbd.CH-- at the same time, (B) a liquid crys-line composition comprising at least one liquid crystalline compound of the general formula (1), and (C) a liquid crystal display element wherein the composition (B) is used. The liquid crystalline compounds of the present invention are distinguished by their characteristics of steep threshold voltage, an adequate magnitude of values in optical or dielectric anisotropy, an extremely high ratio of elastic constants and low viscosity in addition to good compatibility with other liquid crystalline compounds.

REFERENCES:
patent: 5154851 (1992-10-01), Goto et al.
patent: 5308537 (1994-05-01), Coates et al.
patent: 5328637 (1994-07-01), Buchecker et al.
patent: 5370819 (1994-12-01), Fujita et al.
patent: 5449810 (1995-09-01), Fujita et al.
patent: 5609791 (1997-03-01), Fujita et al.
patent: 5635108 (1997-06-01), Fujita et al.
patent: 5662830 (1997-09-01), Fujita et al.
patent: 5695681 (1997-12-01), Siemensmeyer et al.
patent: 5766366 (1998-07-01), Tomi et al.
patent: 5776367 (1998-07-01), Matsui et al.
patent: 5807500 (1998-09-01), Bremer et al.
patent: 5833879 (1998-11-01), Miyazawa et al.

Affiliated with

Also associated with

Rating

Liquid crystalline compounds containing hydrocarbon groups, liqu does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Liquid crystalline compounds containing hydrocarbon groups, liqu, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid crystalline compounds containing hydrocarbon groups, liqu will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-560829