Nematic liquid crystal compositions

Details Nematic liquid crystal compositions Nematic liquid crystal compositions

1975-06-06

1977-03-29

Sebastian, Leland A.

Compositions

Liquid crystal compositions

350160LC, C09K 334, G02F 113

Patent

active

040148114

ABSTRACT:
Nematic liquid crystal compositions having positive dielectric anisotropy are obtained by mixing at least one of p-n-alkylphenyl-p'-cyanobenzoates represented by the formula, ##STR1## wherein R.sub.2 is n-alkyl group of 3 to 8 carbon atoms with at least one of p-cyanophenyl-p'-n-alkylbenzoates represented by the formula, ##STR2## wherein R.sub.1 is n-alkyl group of 4 to 8 carbon atoms. Said compositions exhibit nematic liquid crystal phase over a broad temperature range and therefore, are useful for the torsion effect-type display device.

REFERENCES:
patent: 3881806 (1975-05-01), Suzuki
patent: 3891307 (1975-06-01), Tsukamoto et al.
patent: 3923857 (1975-12-01), Boller et al.
patent: 3975286 (1976-08-01), Oh
patent: 3981817 (1976-09-01), Boller et al.

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