Liquid crystalline compounds having exo-methylene site and liquid crystal compositions comprising the same
AssigneeChisso Corporation
InventorsKazutoshi Miyazawa, Shuichi Matsui, Yasuko Sekiguchi, Etsuo Nakagawa
Life of this patent
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Abstract
A liquid crystalline compound represented by the general formula (1) ##STR1## wherein R.sub.1 represents an alkyl or alkoxy group having 1 to 10 carbon atoms, a cyano group, a halogen atom, or an alkyl or alkoxy halide group having 1 to 4 carbon atoms; R.sub.2 represents an alkyl group having 1 to 10 carbon atoms; rings A.sub.1, A.sub.2, A.sub.3, and A.sub.4 each independently represent a 1,4-phenylene or 1,4-cyclohexylene group; Z.sub.1, Z.sub.2, and Z.sub.3 each independently represent a covalint bond, --CH.sub.2 CH.sub.2 --, --CH.dbd.CH--, --C.tbd.C-- or --COO--; 1 and m are 0 pr 1; and n is 0 to 10.
Claims17
A liquid crystalline compound represented by the general formula ( 1):
- ##STR45## wherein R.sub.1 represents an alkyl or alkoxy group having 1 to 10 carbon atoms, a cyano group, a halogen atom, or an alkyl or alkoxy halide group having 1 to 4 carbon atoms;
- R.sub.2 represents an alkyl group having 2 to 10 carbon atoms;
- rings A.sub.1, A.sub.2, A.sub.3, and A.sub.4 each independently represent a 1,4-phenylene, 1,4-cyclohexylene, 1,4-cyclohexenylene, 1,3-dioxane-2,5-diyl, Dyrimidine-2,5-diyl, pyridine-2,5-diyl, or bicyclo[1,1,1]pentanediyl group, provided that the rings may be substituted with one or more halogen atoms;
- Z.sub.1, Z.sub.2, and Z.sub.3 each independently represent a covalent bond, --CH.sub.2 CH.sub.2 --, --CH.dbd.CH--, --C.tbd.C--, --COO--, --OCO--, --CH.sub.2 O--, --OCH.sub.2 -- or --(CH.sub.2).sub.4 --;
- l and m are 0 or 1;
- and
- n is 0 to 10;
- provided that R.sub.2 is an alkyl group having 2 to 10 carbon atoms when R.sub.1 is a halogen atom, a halogenated alkyl group or a halogenated alkoxy group, the ring to which R.sub.1 is directly connected is a 1,4-phenylene group which may be substituted by a halogen atom, and ring A.sub.4 is a 1,4-cyclohexylene group.
A liquid crystalline compound represented by the general formula (1-1):
- ##STR46## wherein R.sub.1 represents an alkyl or alkoxy group having 1 to 10 carbon atoms, a cyano group, a halogen atom, or an alkyl or alkoxy halide group having 1 to 4 carbon atoms;
- R.sub.2 represents an alkyl group having 2 to 10 carbon atoms;
- rings A.sub.3 and A.sub.4 each independently represent a 1,4-phenylene or 1,4-cyclohexylene, provided that the rings may be substituted with one or more halogen atoms;
- Z.sub.3 represents a covalent bond, --CH.sub.2 CH.sub.2 --, --CH.dbd.CH--, --C.tbd.C--, --COO--, --OCO--, --CH.sub.2 O--, --OCH.sub.2 -- or --(CH.sub.2).sub.4 --;
- and
- n is 0 to 10;
- provided that R.sub.2 is an alkyl group having 2 to 10 carbon atoms when R.sub.1 is a halogen atom, a halogenated alkyl group or a halogenated alkoxy group, ring A.sub.3 is a 1,4-phenylene group which may be substituted by a halogen atom, and ring A.sub.4 is a 1,4-cyclohexylene group.
A liquid crystalline compound represented by the general formula (1-2):
- ##STR47## wherein R.sub.1 represents an alkyl or alkoxy group having 1 to 10 carbon atoms, a cyano group, a halogen atom, or an alkyl or alkoxy halide group having 1 to 4 carbon atoms;
- R.sub.2 represents an alkyl group having 1 to 10 carbon atoms;
- rings A.sub.2, A.sub.3 and A.sub.4 each independently represent a 1,4-phenylene or 1,4-cyclohexylene, provided that the rings may be substituted with one or more halogen atoms;
- Z.sub.2 and Z.sub.3 each independently represent a covalent bond, --CH.sub.2 CH--, --CH.dbd.CH--, --C.tbd.C--, --COO--, --OCO--, --CH.sub.2 O--, --OCH.sub.2 -- or --(CH.sub.2).sub.4 --;
- and
- n is 0 to 10;
- provided that R.sub.2 is an alkyl group having 2 to 10 carbon atoms when R.sub.1 is a halogen atom, a halogenated alkyl group or a halogenated alkoxy group, ring A.sub.2 is a 1,4-phenylene group which may be substituted by a halogen atom, and ring A.sub.4 is a 1,4-cyclohexylene group.
Dependencies are inferred from the claim text.