Document Type and Number:
Japanese Patent JPH0438738
Kind Code:
B2
Abstract:
Liquid crystal phases containing at least one optically active compound of the formula I R1-X1-CHRo(CH2)pX2-R2 I wherein X1 and X2 independently of one another are each -CO-O- or -O-CO-, one of X1 and X2 may also be -O-, R1 and R2 independently of one another are each a group -(A1-Z)m-(A2)n-Y, wherein A1 and A2 in each case independently of one another are a 1,4-phenylene, pyrimidine-2,5-diyl, pyrazine-2,5-diyl, pyridine-2,5-diyl, 1,4-cyclohexylene, 1,3-dioxane-2,5-diyl, 1,3-dithiane-2,5-diyl or 1,4-bicyclo(2,2,2)-octylene group, it also being possible for this to be monosubstituted or polysubstituted by F, Cl, Br, CN and/or alkyl groups with up to 12 C atoms, and it being possible for 1 or 2 non-adjacent CH2 groups in the alkyl groups to be replaced by O atoms, Z is -CO-O-, -O-CO-, -CH2CH2-, -OCH2-, -CH2O-, -CH=N-, -N=CH-, -N=N-, -N(O)=N- or a single bond, m and n in each case independently of one another are O, 1 or 2, Y is independently of one another a straight-chain or branched alkyl group with up to 12 C atoms, it being possible for 1 or 2 non-adjacent CH2groups to be replaced by O atoms, or, if n is 1 or 2, also F, Cl, Br or CN, R0 is an alkyl group with up to 5 C Atoms or a phenyl group or a cyclohexyl group, display largely temperature-independent electrooptical parameters.
Application Number:
JP15147485A
Publication Date:
June 25, 1992
Filing Date:
July 11, 1985
Export Citation:
International Classes:
C09K19/54; C07C67/00; C07C69/712; C07C69/75; C07C69/76; C07C69/90; C07C69/92; C07C69/94; C07C241/00; C07C245/08; C07C251/18; C07C251/24; C07C253/00; C07C255/46; C07C255/55; C07C255/57; C07C255/58; C07C291/08; C07D211/00; C07D239/00; C07D239/26; C07D241/12; C07D319/00; C07D319/06; C07D339/00; C07D339/08; C09K19/20; C09K19/30; C09K19/32; C09K19/34; C09K19/58
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