Optically active oxirane derivatives, and their use as dopes in

Details Optically active oxirane derivatives, and their use as dopes in Optically active oxirane derivatives, and their use as dopes in

1992-06-22

1994-08-09

Wu, Shean

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

25229964, 25229965, 25229966, 25229967, 544298, 544335, 526268, 548136, 549 60, 549512, 549555, 549556, 549557, 549560, C09K 1934, C07D23902, C07D30312

Patent

active

053364368

ABSTRACT:
Optically active oxirane derivatives containing a mesogenic molecular unit are suitable as dopes in liquid-crystal mixtures. They give liquid-crystalline ferroelectric phases having short response times and electroclinic phases having large electroclinic coefficients. A further advantage is that they induce a helix of very small pitch, so that they are also suitable for helix compensation in LC mixtures.

REFERENCES:
patent: 4638073 (1987-01-01), Walba et al.
patent: 4876028 (1989-10-01), Hemmerling et al.
patent: 4927244 (1990-05-01), Bahr et al.
patent: 4988459 (1991-01-01), Scherowsky et al.
patent: 4997591 (1991-03-01), Heppke et al.
patent: 5167855 (1992-12-01), Wand et al.
Ferroelectric Liquid Crystals Principles, Properties and Applications, G. W. Taylor, Ed., Gordon and Breach Science Publishers (Philadelphia), pp. 133-140 (1991).

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