A novel smectic C liquid crystal compound useful as a component of ferroelectric liquid crystal materials capable of effecting high-speed response is provided, which compound is a smectic liquid crystalline 5-alkoxy-2-(4-alkylphenyl)pyrimidine compound expressed by the formula
wherein R¹ represents a linear alkyl group of 4 to 20 carbon atoms and R² represents a linear alkyl group of 7 to 20 carbon atoms.
SAITO, SH.;KITANO, K.;MIYAZAWA, K.;OHNO, K.;INOUE, H.
作者:SAITO, SH.、KITANO, K.、MIYAZAWA, K.、OHNO, K.、INOUE, H.
DOI:——
日期:——
US4882083A
申请人:——
公开号:US4882083A
公开(公告)日:1989-11-21
Smectic liquid crystal mixture
申请人:Chisso Corporation
公开号:US04882083A1
公开(公告)日:1989-11-21
A smectic C liquid crystal mixture having a broad smectic C phase temperature range including room temperature, a ferroelectric smectic C liquid crystal mixture having a large spontaneous polarization, comprising the above smectic C mixture and at least one optically active compound, and a liquid crystal display element having an improved response time, containing the above ferroelectric smectic C liquid crystal mixture are provided, which smectic C liquid crystal mixture comprises (1) at least two components at least one of which is a pyrimidine compound expressed by the formula ##STR1## wherein R.sup.1 represents a linear alkyl group of 4 to 20 carbon atoms and R.sup.2 represents a linear alkyl group having 7-20 carbons and having a smectic C phase; (2) at least one pyrimidine compound of the formula (I) and at least one pyrimidine compound expressed by the formula ##STR2## wherein R.sup.3 represents a linear alkyl group of 6 to 12 carbon atoms and R.sup.4 represents a linear alkyl group having 8 to 11 carbons and having a smectic C phase; or (3) at least one pyrimidine compound of the formula (I) and at least one biphenylpyrimidine compound expressed by the formula ##STR3## wherein R.sup.5 and R.sup.6 each are a linear alkyl or alkoxy group each having 1-18 carbons.