Liquid-crystalline compounds, and liquid-crystalline medium

Details Liquid-crystalline compounds, and liquid-crystalline medium Liquid-crystalline compounds, and liquid-crystalline medium

1999-09-25

2000-11-14

Wu, Shean C.

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

25229901, 25229961, 25229962, 25229963, 25229967, C09K 1934, C09K 1932, C09K 1930, C09K 1952

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active

061467197

ABSTRACT:
A liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, including one or more compounds of the general formula I: ##STR1## in which, R is H, an alkyl or alkenyl radical having 1 or 2 to 15 carbon atoms respectively which is unsubstituted, monosubstituted by CN or .sub.CF. or at least monosubstituted by halogen, where one or more CH.sub.2 groups in these radicals may also, in each case independently of one another, be replaced by --O--, --S--, ##STR2## --CO--, --CO--O--, --O--CO--, or --O--CO--O-- in such a way that O atoms are not linked directly to one another,

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