Nematic compounds and mixtures

Compositions – Liquid crystal compositions

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260473R, 350160LC, G02F 113, C09K 334

Patent

active

040011372

ABSTRACT:
Compounds of the general formula ##STR1## wherein n is 0, 1 or 2, R.sub.1 is straight-chain alkyl or alkoxy of 1-7 carbon atoms or straight-chain alkanoyloxy of 2-7 carbon atoms, and R.sub.2 is straight-chain alkyl or alkoxy of 1-7 carbon atoms with the proviso that when n is 0, R.sub.1 and R.sub.2 together contain at least 4 carbon atoms, which form nematic phases, can be produced by reacting a phenol of the general formula ##STR2## WHEREIN R.sub.2 has the values given above, and p is 0, 1 or 2 or a corresponding phenolate, with an aromatic carboxylic acid of the general formula ##STR3## WHEREIN R.sub.1 has the values given above, and q is 0, 1 or 2, and the sum p + q is n, or with a reactive derivative of this acid.

REFERENCES:
patent: 3770654 (1973-11-01), Katagiri et al.
patent: 3790498 (1974-02-01), Katagiri et al.
patent: 3826757 (1974-07-01), Wong
patent: 3876286 (1975-04-01), Deutscher et al.
patent: 3915883 (1975-10-01), Vanmeter et al.
Z. Naturforsh; Steinstrasser, R., vol. 27b, pp. 774-779 (July 1972).
J. Am. Chem. Soc., Rondeau, R., et al., vol. 94, No. 4, pp. 1096-1102 (2/23/72).

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