Smectic liquid-crystal mixture

Details Smectic liquid-crystal mixture Smectic liquid-crystal mixture

1994-07-20

1996-06-25

Wu, Shean C.

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229901, 25229962, 25229963, 25229967, 359103, C09K 1934, C09K 1952, G02F 113

Patent

active

055297188

ABSTRACT:
A smectic liquid-crystal mixture containing rod-shaped molecules having only one side chain and certain phenylpyrimidine derivatives. The liquid-crystal mixtures according to the invention are distinguished by a low melting point and a high S.sub.C /S.sub.A phase-transition temperature. The use of bisesters of the formula I allows the number of phenylpyrimidine derivatives in the mixtures according to the invention to be significantly reduced. Ferroelectric mixtures according to the invention have, in particular, high contrast, good alignment, a large margin, low flicker and a large angle in the chevron geometry.

REFERENCES:
patent: 5292453 (1994-03-01), Shinjo et al.
patent: 5391318 (1995-02-01), Yamashita et al.
Demus and Zaschke, Flussige Kristalle in Tabellen.
L. A. Beresnev et al., 1984, "On Mechanisms of Dipolar Ordering in Ferroelectric Liquid Crystals."

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