Patent number: 6670514
Abstract: Compounds of the formula (I)
in which:
R1 is H, F, CF3, OCF3, OCF2H, OCFH2, an alkyl radical or an alkenyl radical;
R2 is H, an alkyl radical or alkyloxy radical or an alkenyl or alkenyloxy radical;
G2—G1 is —CH═CH—, —CH2CH2—, —CF═CH—, —CH═CF—, —CF═CF—, —CH2—, —CF2—;
M1, M2 are each, independently of one another, —C(═O)O—, —OC(═O)—, —CH2O—, —OCH2—, —OCF2—, —CF2O—, —C≡C—, —CH2CH2—, —CF2CF2— or a single bond;
A1, A2 are each, independently of one another, phenylene-1,4-diyl, unsubstituted, monosubstituted or disubstituted by F, cyclohexane-1,4-diyl, 1,3-dioxan-2,5-diyl;
m, n are each, independently of one another, zero or 1; m+n=0 or 1;
The invention furthermore provides a liquid-crystal mixture comprising one or more compounds of the formula (I
Type:
Grant
Filed:
August 8, 2002
Date of Patent:
December 30, 2003
Assignee:
Clariant Finance (BVI) Limited
Inventors:
Rainer Wingen, Barbara Hornung, Wolfgang Schmidt
