Compositions – Liquid crystal compositions – Containing nonsteryl liquid crystalline compound of...
Patent
1989-11-28
1992-05-26
Stoll, Robert L.
Compositions
Liquid crystal compositions
Containing nonsteryl liquid crystalline compound of...
25229901, 25229963, 25229965, 25229966, C09K 1934, C09K 1952, C09K 1930, C09K 1912
Patent
active
051165295
ABSTRACT:
The present invention is directed to a ferroelectric liquid crystal composition having quick response properties and assuming a smectic C* phase in an extensive temperature range inclusive of room temperature, and an optical switching element having a quick response property containing this composition.
The ferroelectric liquid crystal composition is here disclosed which comprises at least one chiral compound (liquid crystal component A) having an optical activity site represented by the formula (A) ##STR1## wherein R.sup.1 is a straight-chain or branched alkyl group having 2 to 18 carbon atoms or a straight-chain or branched alkoxy group having 1 to 18 carbon atoms, and * indicates an asymmetric carbon atom,
and at least one non-chiral compound (liquid crystal component B) having a smectic C phase (hereinafter referred to as "S.sub.C phase"; which shall apply in the following), an S.sub.I phase, an S.sub.F phase, an S.sub.G phase, an S.sub.H phase, an S.sub.J phase or an S.sub.K phase.
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Bone et al., "Synthesis and Physical Evaluation of Novel Ferroelectric Materials with High Spontaneous Polarization", Molecular Crystals & Liquid Crystal, Nov. 1988, pp. 117-134.
Furukawa Kenji
Ichihashi Mitsuyoshi
Kikuchi Makoto
Takeshita Fusayuki
Terashima Kanetsugu
Chisso Corporation
Stoll Robert L.
Tucker Philip
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