Compositions – Liquid crystal compositions – Containing nonsteryl liquid crystalline compound of...
Patent
1983-07-11
1985-07-02
Gron, Teddy S.
Compositions
Liquid crystal compositions
Containing nonsteryl liquid crystalline compound of...
2522996, 25229963, 25229964, 25229965, 25229966, 350350R, 350350S, 560 1, 560 8, 560 59, 560 61, 560 62, 560 64, 560 65, 560 72, 560 73, 560102, 560106, 560107, 560108, 560109, 560116, 560118, C09K 334, G02F 113, C07C 69773, C07C 6978
Patent
active
045267049
ABSTRACT:
Compounds of the formula ##STR1## wherein n is 0 or 1; one of X.sup.1 and X.sup.2 is --COO-- or --OOC-- and the other is a single covalent bond or --CH.sub.2 CH.sub.2 --; X.sup.3 and X.sup.4 individually are a single covalent bond or --CH.sub.2 CH.sub.2 --, with the proviso that at most one of X.sup.1, X.sup.2, X.sup.3 and X.sup.4 is --CH.sub.2 CH.sub.2 --; rings A.sup.1 and A.sup.5 individually are a group of the formula ##STR2## or trans-1,4-cyclohexylene; rings A.sup.2, A.sup.3 and A.sup.4 individually are a group of formula II or, when ring A.sup.2, A.sup.3 or A.sup.4 is not linked with at least one of the other two of these rings by a single covalent bond then such ring also can be trans-1,4-cyclohexylene, with the proviso that at least one of rings A.sup.1 through A.sup.5 is a group of formula II; Y is hydrogen, or when Y is attached to a ring of formula II which is not linked with another ring via a single covalent bond, Y also can be fluorine, chlorine or methyl; and R.sup.1 and R.sup.2 individually are straight-chain alkyl of 1-7 carbon atoms, or when R.sup.1 or R.sup.2 is attached to a ring of formula II such R.sup.1 or R.sup.2 also can be straight-chain alkoxy of 1 to 7 carbon atoms;
their manufacture and use for electro-optical and chromatographical purposes and liquid crystalline mixtures containing these compounds are described.
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Petrzilka Martin
Schadt Martin
Villiger Alois
Gron Teddy S.
Hoffmann-La Roche Inc.
Leon Bernard S.
Manning Elizabeth
Saxe Jon S.
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