Use of optically active 1,3-dioxolane-4-carboxylates as dopes in

Details Use of optically active 1,3-dioxolane-4-carboxylates as dopes in Use of optically active 1,3-dioxolane-4-carboxylates as dopes in

1992-04-30

1997-06-24

Harris Kelly, Cynthia

Compositions

Liquid crystal compositions

Containing nonsteryl liquid crystalline compound of...

C09K 1934

Patent

active

056414285

ABSTRACT:
Optically active, mesogenic 1,3-dioxolane-4-carboxylates are suitable as dopes in liquid-crystal mixtures. They result in liquid-crystalline ferroelectric phases having short switching times and in electroclinic phases having large electroclinic coefficients. Their particular advantage is that they induce a helix of very large pitch, meaning that helix compensation by further dopes is unnecessary. In addition, the 1,3-dioxolane-4-carboxylates exhibit high UV stability.

REFERENCES:
patent: 4336183 (1982-06-01), Nakahara et al.
patent: 4873019 (1989-10-01), Krause et al.
Takenaka et al., Mol. Cryst. Liq. Cryst., vol. 131, pp. 257-271 (1985).
CA 74:3148t(1971).
CA 84:163740q (1976).
Morrison and Boyd, Organic Chemistry, 4th Ed., pp. 786-787 (1983).
Chemical Abstracts, vol. 88, p. 566, No. 22089e (Jan. 1978).
Chemical Abstracts, vol. 88, p. 566, No. 22094c (Jan. 1978).

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