Liquid crystal mixture

• Main Authors: OGAWA AYAKO, SCHMIDT WOLFGANG, LI JI, HORNUNG BARBARA, WINGEN RAINER, NONAKA TOSHIAKI, DUBAL HANS-ROLF
• Format: Patent
• Language: English
• Published: 06.05.2004
• Edition: 7
• Subjects: ADHESIVES; CHEMISTRY; DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH ISMODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THEDEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY,COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g.SWITCHING, GATING, MODULATING OR DEMODULATING; DYES; FREQUENCY-CHANGING; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; HETEROCYCLIC COMPOUNDS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-LINEAR OPTICS; OPTICAL ANALOGUE/DIGITAL CONVERTERS; OPTICAL LOGIC ELEMENTS; OPTICS; ORGANIC CHEMISTRY; PAINTS; PHYSICS; POLISHES; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNIQUES OR PROCEDURES FOR THE OPERATION THEREOF

Liquid crystal mixture comprising one or several compounds of formula (I) wherein R : is H or a linear or branched alkyl group of 1 to 20 or a linear or branched alkenyl group of 2 to 20 C atoms, wherein in either case optionally one -CH2- group being replaced by cyclohexylen-1,4-diyl, or one or two -CH2- groups optionally being replaced by -O-, if non-adjacent to N, or by -C(=O)-, -Si(CH3)2-; and/or one or more H of the alkyl or alkenyl group optionally being replaced by F or CH3 R : stands for a) H or F b.) a linear or branched alkyl group of 1 to 20 or linear or branched alkenyl group of 2 to 20 C atoms, wherein in either case one or two -CH2- groups optionally being replaced by -O-, -C(=O)O-, -Si(CH3)2-, and/or one or more fl of the alkyl or alkenyl group being replaced by F or CH3 c) a radical (a) wherein independently from the respective meanings in (1) R , R , R , R : are independently from another an alkyl group of 1 to 8 C atoms M , M : represent independently from another a single bond, -OC(=O), -C(=O)O-, -OCH2-, -NH- A: is a) a linear or branched alkan-alpha,omega)-diyl group of 1 to 20 or alkene-alpha,omega-diyl group of 2 to 20 C atoms, optionally, if non-adjacent to M<1/2>, one or two non-adjacent -CH2- groups may be replaced by -O- b) the group -C(=Y)- wherein Y is CH-Z with Z being phenylen-1,4-diyl, optionally substituted by one to three halogenatoms, alkyl or alkyloxy groups of 1 to 4 C atoms, with the proviso that M and M are -C(=O)O- and -OC(=O)-, c) the group -CHY wherein Y is CH2-Z with Z being phenylen-1,4-diyl, optionally substituted by one to three halogenatoms, alkyl or alkyloxy groups of 1 to 4 C atoms, with the proviso that M and M are -C(=O)O- and -OC(=O)-, d) a group (b) wherein p, q are 0, 1 or 2, the sum of p+q being >=1; M is a single bond or -OC(=O)-, -C(=O)O-, -OCH2-, -CH2O-, -C=C-, -CH2CH2-, -CH2CH2CH2CH2- the radicals (c) and (d) are independently from another phenylen-1,4-diyl, which optionally can be substituted by one, two or three F, or cyclohexan-1,4diyl, which can optionally be substituted by o