Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1980-12-24
1982-04-06
Gron, Teddy S.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
2522991, 25229961, 350349, 350350R, G02F 113, C09K 334, C07D31904
Patent
active
043235042
ABSTRACT:
Novel liquid crystalline compounds having low viscosity, high (N-1) transition temperatures, positive dielectric anisotropy and low optical birefringence are provided and are represented by the formula: ##STR1## where R and R.sup.1 can be the same or different straight chain alkyl or alkoxy group.
Also disclosed are liquid crystalline admixtures having a broad nematic temperature range by virtue of the inclusion therein of the above-described compound. Typical admixtures of the invention include at least one compound of the above formula and at least one compound of the general formula ##STR2## where R.sub.1, R.sub.2 and R.sub.3 can be the same or different alkyl or alkoxy group. These admixtures exhibit low optical birefringence and are useful as the host material in a guest-host electrooptical display.
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patent: 4298528 (1981-11-01), Sethofer
Sorkin, H., Mol. Cryst. Liq. Cryst. (Letters), vol. 56, pp. 279-281 (1980).
Crutcher William C.
Gron Teddy S.
Timex Corporation
Timmer Edward J.
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