Patent ID: 6372307
Filing Date: 2002-04-16
Classification: C09K,G02F,G06K,G07F

Abstract:
A chip card containing a ferroelectric liquid-crystal display containing a ferroelectric liquid-crystal layer, wherein the liquid-crystal layer has optical anisotropy values of &lE;0.15 in the region of between âˆ’10 and 40Â° C., wherein the liquid-crystal layer comprises one or more compounds of the formula (I)R1(â€”A1â€”M1)a(â€”A2â€”M2)bâ€”A3â€”(M4â€”A4)câ€”(M5â€”A5)dâ€”R2â€ƒâ€ƒ(I) where the symbols and indices are defined as follows:R1 is a) hydrogen, â€”F, â€”Cl, â€”CF3, â€”OCF3 or â€”CN, b) a straight-chain or branched alkyl radical (with or without an asymmetrical carbon atom) having 1 to 20 carbon atoms, where b1) one or more non-adjacent and non-terminal â€”CH2â€” groups may be replaced by â€”Oâ€”, â€”Sâ€”, â€”COâ€”, â€”COâ€”O, â€”Oâ€”CO, â€”Oâ€”COâ€”Oâ€”or â€”Si(CH3)2â€”, and/or 2) one or more â€”CH2â€” groups may be replaced by â€”CH&boxH;CHâ€”, â€”Câ‰¡Câ€”, cyclopropane-1,2-diyl, 1,4-phenylene, 1,4-cyclohexylene or 1,3-cyclopentylene, and/or 3) one or more H atoms may be replaced by F, CN and/or Cl, and/or 4) the terminal CH3 group may be replaced by one of the following chiral groups (optically active or racemic): R3, R4, R5, R6 and R7 are identical or different and are a) hydrogen b) a straight-chain or branched alkyl radical (with or without an asymmetrical carbon atom) having 1 to 16 carbon atoms, where b1) one or more non-adjacent and non-terminal â€”CH2â€” groups may be replaced by â€”Oâ€”, and/or 2) one or two â€”CH2â€” groups may be replaced by â€”CH&boxH;CHâ€”, c) R4 and R5 together may alternatively be â€”(CH2)4â€” or â€”(CH2)5â€” if they are bonded to an oxirane, dioxolane, tetrahydrofuran, tetrahydropyran, butyrolactone or valerolactone system; R2 is a straight-chain or branched alkyl radical (with or without an asymmetrical carbon atom) having 1 to 20 carbon atoms, where a) one or more non-adjacent and non-tenninal â€”CH2â€” groups may be replaced by â€”Oâ€”, â€”Sâ€”, â€”COâ€”, â€”COâ€”O, â€”Oâ€”COâ€”, â€”Oâ€”COâ€”Oâ€”or â€”Si(CH3)2â€”, and/or b) one or more â€”CH2â€” groups may be replaced by â€”CH&boxH;CHâ€”, â€”Câ‰¡Câ€”, cyclopropane-1,2-diyl, 1,4-phenylene, 1,4-cyclohexylene or 1,3-cyclopentylene; M1, M2, M4 and M5 are identical or different and are a single bond or â€”COâ€”Oâ€”, â€”COâ€”Sâ€”, â€”CSâ€”Oâ€”, â€”CSâ€”Sâ€”, â€”CH2â€”O, â€”CH2â€”Sâ€”, â€”CH2â€”CH2â€”, â€”CH&boxH;CHâ€”, â€”Câ‰¡Câ€”, â€”CH2â€”CH2â€”COâ€”Oâ€”, â€”CH2CH2CH2O, â€”CH2CH2CH2CH2â€”, (E)â€”CH&boxH;CHCH2Oâ€”, and their mirror-image arrangements; or a single bond, A1 and A5 are identical or different and are cyclohexane-1,4-diyl, 1-cyanocyclohexane-1,4-diyl, 1,3-dioxane-2,5-diyl, 5-cyano-1,3-dioxane-2,5-diyl, 1,3-dioxaborinane-2,5-diyl or 1-alkyl-1-silacyclohexane-1,4-diyl; A2 and A4 are identical or different and are cyclohexane-1,4-diyl, 1-cyanocyclohexane-1,4-diyl, 1,3-dioxane-2,5-diyl, 5-cyano-1,3-dioxane-2,5-diyl, 1,3-dioxaborinane-2,5-diyl, 1-alkyl-1-silacyclohexane-1,4-diyl, 1,4-phenylene, 2-fluoro-1,4-phenylene, 2,3-difluoro-1,4-phenylene, pyrimidine-2,5-diyl, pyridine-2,5-diyl or 2-fluoropyridine-3,6-diyl; A3 is 1,4-phenylene, in which one or more H atoms may be replaced by F, Cl, CH3, C2H5, OCH3, CF3, OCF3 and/or CN, pyrazine-2,5-diyl, in which one or two H atoms may be replaced by F, Cl and/or CN, pyridazine-3,6-diyl, in which one or two H atoms may be replaced by F, Cl and/or CN, pyridine-2,5-diyl, in which one or more H atoms may be replaced by F, Cl and/or CN, pyrimidine-2,5-diyl, in which one or two H atoms may be replaced by F, Cl and/or CN, 1,3,4-thiadiazole-2,5-diyl, 1,3-thiazole-2,4-diyl, in which one H atom may be replaced by F, Cl and/or CN, 1,3-thiazole-2,5-diyl, in which one H atom may be replaced by F, Cl and/or CN, thiophene-2,4diyl, in which one H atom may be replaced by F, Cl and/or CN, thiophene-2,5diyl, in wich one or two H atoms may be replaced by F, Cl and/or CN, naphthalene-2,6-diyl, naphthalene-1,4-diyl or naphthalene-1,5-diyl, in each of which one or more H atoms may be replaced by F, Cl and/or CN and/or one or two CH groups may replaced by N; a, b, c and d are zero or one and the sum a+d is 1 or 2, with the proviso that the compound of the formula (I) cannot contain more than four five-or higher-membered ring systems.