Liquid-crystalline medium

Abstract

The present invention relates to liquid-crystalline (LC) media or LC materials and to energy saving liquid-crystal displays (LCDs) containing these media, especially to gaming displays and AR / VR headsets addressed by an active matrix and in particular to LC displays of the TN, PS-TN, STN, TN-TFT, OCB, IPS, PS-IPS, FFS, HB-FFS, XB-FFS, PS-FFS, SA-HB-FFS, SA-XB-FFS, polymer stabilised SA-HB- FFS, polymer stabilised SA-XB-FFS, positive VA or positive PS-VA type.

Description

[0001] Foreignfiling_text_P24-240-SEC-WO01

[0002] - 1 -

[0003] Liquid-crystalline medium

[0004] The present invention relates to liquid-crystalline (LC) media and to energy saving liquid-crystal displays (LCDs) containing these media, especially to automotive and 5 gaming displays and AR / VR headsets. In particualar, it relates to LC displays of the TN, PS-TN, STN, TN-TFT, OCB, IPS, PS-IPS, FFS, HB-FFS, XB-FFS, PS-FFS, SA- HB-FFS, SA-XB-FFS, polymer stabilised SA-HB-FFS, polymer stabilised SA-XB- FFS, positive VA or positive PS-VA type. The LC media have positive dielectric anisotropy.

[0005] LCDs are used in many areas for the display of information. LCDs are used both for direct-view displays and for projection-type displays. The electro-optical modes used are, for example, the twisted nematic (TN), super twisted nematic (STN), optically compensated bend (OCB) and electrically controlled birefringence (ECB) modes 15

[0006] together with their various modifications, as well as others. All these modes utilise an electric field which generated substantially perpendicular to the substrates and the LC layer.

[0007] Besides these modes, there are also electro-optical modes that utilise an electric 20

[0008] field which is substantially parallel to the substrates or the LC layer. For example, WO 91 / 10936 discloses a LC display in which the electric signals are generated in such a way that the electric fields have a significant component parallel to the LC layer, and which has since then become known as “in-plane switching" (IPS) display.

[0009] 25 The principles of operating such a display are described, for example, by R. A. Soref in Journal of Applied Physics, Vol. 45, No. 12, pp. 5466-5468 (1974).

[0010] IPS displays contain an LC layer between two substrates with planar orientation, where the two electrodes are arranged on only one of the two substrates and preferably have interdigitated, comb-shaped structures. On application of a voltage to the electrodes an electric field with a significant component parallel to the LC layer is generated between them. This causes realignment of the LC molecules in the layer plane.

[0011] 35 Foreignfiling_text_P24-240-SEC-WO01

[0012] - 2 -

[0013] EP 0 588 568, for example, discloses various possibilities for the design of the electrodes and for addressing an IPS display. DE 198 24 137 likewise describes various embodiments of such IPS displays.

[0014] 5 LC materials for IPS displays of this type are described, for example, in

[0015] DE 195 28 104.

[0016] Furthermore, so-called “fringe-field switching" (FFS) displays have been reported (see, inter alia S. H. Jung et al., Jpn. J. Appl. Phys., Volume 43, No. 3, 2004, 1028), which contain two electrodes on the same substrate, one of which is structured in a comb-shaped manner and the other is unstructured. A strong, so-called "fringe field" is thereby generated, i.e. a strong electric field close to the edge of the electrodes, and, throughout the cell, an electric field which has both a strong vertical component and also a strong horizontal component. FFS displays have a low viewing-angle 15

[0017] dependence of the contrast. FFS displays usually contain an LC medium with positive dielectric anisotropy, and an alignment layer, usually of polyimide, which provides planar alignment to the molecules of the LC medium.

[0018] LCDs of the IPS and FFS electro-optical mode are, in particular, suitable for use in 20

[0019] modern desktop monitors, TV sets and multimedia applications. The LC media according to the present invention are preferably used in displays of this type. In general, dielectrically positive LC media having rather lower values of the dielectric anisotropy are used in FFS displays, but in some cases LC media having a dielectric 25 anisotropy of only about 3 or even less are also used in IPS displays.

[0020] A further improvement has been achieved by the HB-FFS mode. One of the unique features of the HB-FFS mode in contrast to the traditional FFS technology is that it enables higher transmittance which allows operation of the panel with less energy consumption.

[0021] Another recently developed mode is the XB-FFS mode, wherein the LC medium additionally contains a polar liquid crystal compound with low dielectric anisotropy.

[0022] 35

[0023] FFS and IPS displays can be operated as active-matrix displays (AMD) or passivematrix displays (PMD). In the case of active-matrix displays individual pixels are Foreignfiling_text_P24-240-SEC-WO01

[0024] - 3 -

[0025] usually addressed by integrated, non-linear active elements such as, for example, thin-film transistors (TFTs), while in the case of passive-matrix displays individual pixels are usually addressed by the multiplex method as known from the prior art. The displays according to the present invention are preferably addressed by an 5 active matrix, preferably by a matrix of TFT. However, the LC media according to the invention can also advantageously be used in displays having other known addressing means.

[0026] Typical applications of IPS and FFS technologies are monitors, notebooks, televisions, mobile telephones, tablet PCs, etc. Both the IPS and the FFS technology have certain advantages over other LCD technologies, such as, for example, the vertical alignment (VA) technology, e.g. a broad viewing angle dependency of the contrast.

[0027] 15

[0028] The provision of further LC media and the use thereof in a display having high transmission, a good black state and a high contrast ratio is a central challenge for modern FFS and IPS applications. In addition, modern applications also require good low-temperature stability and fast addressing times.

[0029] 20

[0030] Until now, it was not possible to design suitable LC media for automotive and gaming having a low birefringence in combination with a high contrast ratio e.g. high elastic constants

[0031]

[0032] and Kav, low temperature stability and low response time parameter y-| / K-|. Therefore, the overall picture quality in such devices still requires a further 25 improvement. In particular, in the area of gaming applications, for the purpose of achieving fast switching speed other parameters, which are relevant for the image quality, have been often sacrificed.

[0033] The present invention has the object of providing LC media, in particular for energy saving gaming FFS and IPS displays, automotive applications and AR / VR headsets, but also for TN, positive VA or STN displays, and in particular for active-matrix displays like those addressed by TFTs, which have a high average elastic constant Kavin combination with a low response time parameter y-| /

[0034]

[0035] and a low rotational 35 viscosity and a relatively low birefringence An. Additionally, they need to have a high specific resistance, low threshold voltage, high dielectric anisotropy, a good low Foreignfiling_text_P24-240-SEC-WO01

[0036] - 4 -

[0037] temperature stability (LTS), fast response times, and enable high brightness. In case of FFS displays there is a need for further optimization of response time, contrast, brightness and reliability. However, it was found that the LC materials of the prior art do often not achieve all these requirements at the same time.

[0038] 5

[0039] Surprisingly, the above technical problem has been solved by providing LC media as described and claimed hereinafter.

[0040] Prior art, for example DE 102 17771 A1 describe biscyclohexyl-1,3-dioxane compounds of Formula I

[0041]

[0042] 15

[0043] where R1 denotes a halogen atom, CN or an alkyl group and R2 denotes an alkyl group. The compound can be used in liquid crystal media, e.g. in active matrix displays in monitors, digital cameras and mobile telephones.

[0044] US 2002 / 119261 A1 discloses a liquid crystal composition comprising component I 20

[0045] that consists of at least one compound represented by formula (I)

[0046]

[0047] 25 and component II that consists of at least one compound selected from a group of compounds represented by formulae (11-1) to (II-7)

[0048] yl

[0049]

[0050] Foreignfiling_text_P24-240-SEC-WO01

[0051] - 5 -

[0052] 5

[0053]

[0054] 15

[0055] 20

[0056]

[0057] 25

[0058]

[0059] However, the LC media of the prior art still require an even further improvement in terms of a sufficiently high average elastic constant Kavin combination with a low 35

[0060] response time parameter y -| / K -|. Foreignfiling_text_P24-240-SEC-WO01

[0061] - 6 -

[0062] It has now been surprisingly found that LC media according to the present invention which contain one or more compounds of the Formula I

[0063] 5

[0064]

[0065] in which the individual substituents are specified in Claim 1,

[0066] show several remarkable improvements, especially when being used in FFS mode displays, like a high average elastic constant Kav, a low response time parameter (Y1 / Ki) in combination with a low rotational viscosity as well as a good solubility, and enable fast response times.

[0067] 15

[0068] Additionally, the LC media according to the present invention have high clearing points, an excellent low temperature stability (LTS) and provide a superior motion picture quality and an improved overall image quality, in particular a high contrast.

[0069] The present invention relates to a LC medium, characterised in that it comprises one 20

[0070] or more compounds of Formula I:

[0071]

[0072] 25

[0073] in which the individual substituents, on each occurrence identically or differently, and each, independently of one another, have the following meanings:

[0074]

[0075] R11 and identically or differently, denote H, straight chain alkyl or alkoxy having 1 to 15 C atoms, straight chain alkenyl or alkenyloxy having 2 to 15 C atoms or branched alkyl, alkoxy, alkenyl, alkenyloxy each having 3 to 15 C atoms, where one or more CH2 groups in these radicals may each

[0076] 35 be replaced, independently of one another, by

[0077]

[0078] Foreignfiling_text_P24-240-SEC-WO01

[0079]

[0080] 5

[0081] -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be replaced by halogen,

[0082] n denotes 0, 1, or 2,

[0083] 15

[0084] 20

[0085]

[0086] 25

[0087]

[0088] Z11and Z12each independently denote a single bond, -CH2CH2-, -CH2-, 35

[0089] -OCH2-, -CH2O-, -O-, -CO-O-, -O-CO-, -CF2O-, -OCF2-, -CH=CH-, -CF=CF-, or -C≡C-, Foreignfiling_text_P24-240-SEC-WO01

[0090] - 8 -

[0091] in a case where n is 2, the two —⟨A11⟩— may be the same as or different from each other, and in a case where n is 2, the two

[0092]

[0093] 1 may be the same as or different from each other

[0094] 5

[0095] The LC media according to the present invention are especially suitable for use in energy saving LC displays of the FFS, HB-FFS, XB-FFS and IPS mode for gaming based on dielectrically positive LC media, and polymer stabilised variants thereof.

[0096] The present invention further relates to the use of a LC medium as described above and below for electro-optical purposes, in particular for the use in LC displays, shutter glasses, LC windows, 3D applications, preferably in TN, PS-TN, STN, TN- TFT, OCB, IPS, PS-IPS, FFS, HB-FFS, XB-FFS, PS-HB-FFS, PS-XB-FFS, SA-HB- 15 FFS, SA-XB-FFS, polymer stabilised SA-HB-FFS, polymer stabilised SA-XB-FFS, positive VA and positive PS-VA displays, very preferably in FFS, HB-FFS, IPS, PS- HB-FFS and PS-IPS displays.

[0097] The invention further relates to an electro-optical LC display containing a LC medium 20 as described above and below, in particular a TN, PS-TN, STN, TN-TFT, OCB, IPS, PS-IPS, FFS, HB-FFS, XB-FFS, PS-HB-FFS, PS-XB-FFS, SA-HB-FFS, SA-XB-FFS, polymer stabilised SA-HB-FFS, polymer stabilised SA-XB-FFS, positive VA or positive PS-VA display, preferably a FFS, HB-FFS, IPS, PS-HB-FFS or PS-IPS display.

[0098] 25

[0099] In the present application, all atoms may optionally include their isotopes. In some embodiments, one or more hydrogen atoms (H) may be optionally replaced by deuterium (D).

[0100] In the Formula I, and in the Formulae II, III, IV to VIII, XVIII to XXIII, XXVII to XXX, N1, N2, or YA, YB, YC, YD, YE, YF and YG if R11, R12, R° and R1denote an alkyl group and / or an alkoxy group, this may be straight-chain or branched. It is preferably straight-chain, has 2, 3, 4, 5, or 6 C atoms and preferably denotes ethyl, propyl, 35 butyl, pentyl, hexyl, ethoxy, propoxy, butoxy, pentoxy, or hexyloxy, furthermore Foreignfiling_text_P24-240-SEC-WO01

[0101] - 9 -

[0102] methyl, methoxy. R11, R12, R0and R1preferably denote straight-chain alkyl having 1 to 6 C atoms or an alkenyl group having 2 to 6 C atoms.

[0103] Oxaalkyl preferably denotes straight-chain 2-oxapropyl (= methoxymethyl),

[0104] 5 2- (= ethoxymethyl) or 3-oxabutyl (= 2-methoxyethyl), 2-, 3- or 4-oxapentyl, 2-, 3-, 4- or 5-oxahexyl.

[0105] If R11, R12, RO and R1 denotes an alkoxy or oxaalkyl group it may also contain one or more additional oxygen atoms, provided that oxygen atoms are not linked directly to one another.

[0106] In another preferred embodiment, one or more of R

[0107]

[0108] ^, R12, ROanR1 are selected

[0109] 15

[0110]

[0111]

[0112] 20

[0113]

[0114] C2-12-alkenylene and S2is H, C1-12-alkyl or C2-12-alkenyl, and very preferably one

[0115] or more of R

[0116]

[0117] ^, R12, ROANC| 1areselected from the group consisting of

[0118]

[0119] 25

[0120]

[0121] -O(CH2)2OCH3, -O(CH2)3OCH3, -O(CH2)4OCH3, -O(CH2)2F, -O(CH2)3F, -O(CH2)4F.

[0122] 35

[0123] If R11, R12, R0and R1denotes an alkenyl group, this may be straight-chain or branched. It is preferably straight-chain and has 2 to 10 C atoms. Accordingly, it Foreignfiling_text_P24-240-SEC-WO01

[0124] - 10 -

[0125] denotes, in particular, vinyl, prop-1- or -2-enyl, but-1-, -2- or -3-enyl, pent-1-, -2-, -3- or -4-enyl, hex-1-, -2-, -3-, -4- or -5-enyl, hept-1-, -2-, -3-, -4-, -5- or -6-enyl, oct-1-, -2-, -3-, -4-, -5-, -6- or -7-enyl, non-1-, -2-, -3-, -4-, -5-, -6-, -7- or -8-enyl, dec- 1-, -2-, -3-, -4-, -5-, -6-, -7-, -8- or -9-enyl.

[0126] 5

[0127] If R11

[0128]

[0129] R0ANC| 1 denotes an alkyl or alkenyl group which is at least monosubstituted by halogen, this group is preferably straight-chain, and halogen is preferably F or Cl. In the case of polysubstitution, halogen is preferably F. The resultant groups also include perfluorinated groups. In the case of monosubstitution, the fluorine or chlorine substituent may be in any desired position, but is preferably in the a>-position.

[0130] Particularly preferred groups R

[0131]

[0132] ^, R12 R0and R1 denotes alkyl, alkenyl, alkynyl or 15 alkoxy having up to 12, preferably up to 8 C atoms, each of which is optionally substituted by halogen, in particular by F, particularly preferred are H, F, alkyl, alkenyl or alkynyl having up to 8 C atoms.

[0133] Preferred alkyl groups are, for example, methyl, ethyl, n-propyl, n-butyl, n-pentyl, 20 n-hexyl, n-heptyl and n-octyl. Preferred alkenyl groups are, for example, ethenyl, propenyl, butenyl and pentenyl. Preferred alkynyl groups are, for example, ethynyl, propynyl, butynyl, pentynyl, hexynyl, heptynyl and octynyl. Preferred alkoxy groups are, for example, methoxy, ethoxy, n-propoxy, n-butoxy, n-pentoxy, n-hexoxy, n-heptoxy, n-octoxy. Halogen preferably denotes F or Cl, F being mostly preferred.

[0134] 25

[0135] Compounds of Formula I

[0136] The compounds of the Formula I are preferably selected from the compounds of the Formulae 1-1 to 1-12

[0137] 35

[0138]

[0139] Foreignfiling_text_P24-240-SEC-WO01

[0140] 5

[0141] 15

[0142]

[0143] 20

[0144] 25

[0145]

[0146] 35 Foreignfiling_text_P24-240-SEC-WO01

[0147] - 12 -

[0148] R11I-12

[0149]

[0150] in which

[0151] R11 and R12 each, independently of one another, denote an alkyl or an alkoxy 5

[0152] group having 1 to 6 C atoms or an alkenyl or an alkenyloxy group having 2 to 6 C atoms in which one or more CH2groups are optionally substituted by -C=C-, -CF2O-, -OCF2-, -CH=CH-,

[0153]

[0154] -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom.

[0155] 15

[0156] Preference is furthermore given to compounds of the Formula I in which

[0157]

[0158] and R12 each, independently of one another, denote H, alkyl, alkenyl or alkynyl having up to 8, preferably up to 5 C atoms, each of which is optionally substituted by halogen, in particular by F.

[0159] 20

[0160] Particularly preferred groups R11 and R12 in Formula I denote H, alkyl, alkenyl, alkynyl or alkoxy having up to 12, preferably up to 8 C atoms, each of which is optionally substituted by halogen, in particular by F, particularly preferred are alkyl, alkenyl or alkynyl having up to 8 C atoms. Preferably, at least one group is not H, 25

[0161] particularly preferably both groups R11 and R12 are not H. R11is very particularly preferably equal to alkyl. R12is furthermore preferably H, alkyl, alkyl which is substituted by at least one fluorine. Very particularly preferably, R11is alkyl and R12is H or alkyl. R11, R12each, independently of one another, very particularly preferably denote unbranched alkyl having 1 to 5 C atoms. If R12and R12denote substituted alkyl, alkoxy, alkenyl or alkynyl, the total number of C atoms in the two groups R11and R12is preferably less than 10.

[0162] 35 Preferred alkyl groups are, for example, methyl, ethyl, n-propyl, n-butyl, n-pentyl, n-hexyl, n-heptyl and n-octyl. Foreignfiling_text_P24-240-SEC-WO01

[0163] - 13 -

[0164] Preferred alkenyl groups are, for example, ethenyl, propenyl, butenyl and pentenyl.

[0165] Preferred alkynyl groups are, for example, ethynyl, propynyl, butynyl, pentynyl, hexynyl, heptynyl and octynyl.

[0166] 5

[0167] Preferred alkoxy groups are, for example, methoxy, ethoxy, n-propoxy, n-butoxy, n-pentoxy, n-hexoxy, n-heptoxy, n-octoxy.

[0168] Halogen preferably denotes F or Cl, F being mostly preferred.

[0169] In one embodiment, the compound of Formula I may be represented by the following Formula 1-1:

[0170] 15

[0171]

[0172] in which

[0173] R11 and R12 each, independently of one another, denote an alkyl or an alkoxy group having 1 to 6 C atoms or an alkenyl or an alkenyloxy group 20

[0174] having 2 to 6 C atoms in which one or more CH2groups are optionally substituted by -C=C-, -CF2O-, -OCF2-, -CH=CH-,

[0175]

[0176] 25 -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom.

[0177] The compounds of the Formula 1-1 may be selected from the following subformulae:

[0178] alkyl — / - H \ \ / - H \ \ / ~Q— alkyl* 1-1 a

[0179] \ \

[0180] alkenyl — / — H \ \ \ / — H \ \ / ~Q— alkyl 1-1 b 35

[0181]

[0182] \ — / \ — /

[0183] in which: Foreignfiling_text_P24-240-SEC-WO01

[0184] - 14 -

[0185] "alkyl" and "alkyl*" each, independently from one another, an alkyl group having 1 to 6 C atoms;

[0186] "alkenyl" and "alkenyl*" each, independently of one another, alkenyl group having 2 to 6 C atoms.

[0187] 5

[0188] In a further embodiment, the compound of Formula I may be represented by the following Formula I-3:

[0189] I-3

[0190]

[0191] in which

[0192] R11 and R12 each, independently of one another, denote an alkyl or an alkoxy group having 1 to 6 C atoms or an alkenyl or an alkenyloxy group having 2 to 6 C atoms in which one or more CH2groups are optionally 15 substituted by -C=C-, -CF2O-, -OCF2-, -CH=CH-,

[0193]

[0194] -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be 20

[0195] substituted by a halogen atom.

[0196] The compounds of the Formula I-3 may be selected from the following subformulae:

[0197] 25

[0198]

[0199]

[0200] in which:

[0201] "alkyl" and "alkyl*" each, independently from one another, an alkyl group having 1 to 6 C atoms;

[0202] "alkenyl" and "alkenyl*" each, independently of one another, alkenyl group having 2 to 6 C atoms.

[0203] 35 Foreignfiling_text_P24-240-SEC-WO01

[0204] - 15 -

[0205] More preferably the medium according to the invention comprises one or more compounds of the Formula 1-1, very preferably selected from the compounds of the Formulae 1-1-1 to 1-1-37

[0206] 5

[0207] 15

[0208]

[0209] 20

[0210] 25

[0211] 35

[0212]

[0213] Foreignfiling_text_P24-240-SEC-WO01

[0214] - 16 -

[0215] 1-1-9 5

[0216] 1-1-10

[0217] 1-1-11

[0218] 15

[0219] 1-1-12

[0220] 20 1-1-13

[0221] 1-1-14 25

[0222] 1-1-15

[0223] 1-1-16

[0224]

[0225] 35 Foreignfiling_text_P24-240-SEC-WO01

[0226] 5

[0227]

[0228] 0

[0229]

[0230] 5

[0231] 1-1-24

[0232] 5

[0233]

[0234] Foreignfiling_text_P24-240-SEC-WO01

[0235] - 18 -

[0236] 1-1-26

[0237] 1-1-27

[0238] 1-1-28

[0239] 1-1-29

[0240] 1-1-30

[0241] 1-1-31

[0242] 1-1-32

[0243] 1-1-33

[0244] 1-1-34

[0245]

[0246] 0 Foreignfiling_text_P24-240-SEC-WO01

[0247] - 19 -

[0248] 1-1-35

[0249] 5

[0250] 1-1-36

[0251] 1-1-37

[0252]

[0253] 15

[0254] in which

[0255] R11 and R12 each, independently of one another, denote an alkyl or an alkoxy group having 1 to 6 C atoms or an alkenyl or an alkenyloxy group 20

[0256] having 2 to 6 C atoms in which one or more CH2groups are optionally substituted by -C=C-, -CF2O-, -OCF2-, -CH=CH-,

[0257]

[0258] 25 -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom.

[0259] More preferably the medium according to the invention comprises one or more compounds of the Formula I-2, very preferably selected from the compounds of the Formulae 1-2-1 to I-2-37:

[0260] 1-2-1

[0261]

[0262] 35 Foreignfiling_text_P24-240-SEC-WO01

[0263] - 20 -

[0264] I-2-2

[0265] 5

[0266] I-2-3

[0267] I-2-4

[0268] I-2-5 15

[0269] I-2-6

[0270]

[0271] 20

[0272] I-2-7

[0273] 25

[0274] I-2-8

[0275] I-2-9

[0276]

[0277] 35 Foreignfiling_text_P24-240-SEC-WO01

[0278] - 21 -

[0279] 1-2-10

[0280] 1-2-11

[0281] 1-2-12

[0282] 1-2-13

[0283] 1-2-14

[0284] 1-2-15

[0285] 1-2-16

[0286] 1-2-17

[0287]

[0288] 35 Foreignfiling_text_P24-240-SEC-WO01

[0289] - 22 -

[0290] 1-2-18

[0291] 5

[0292] 1-2-19

[0293] I-2-20

[0294] 1-2-21 15

[0295] I-2-22

[0296]

[0297] 20

[0298] I-2-23

[0299] 25

[0300] I-2-24

[0301] I-2-25

[0302]

[0303] Foreignfiling_text_P24-240-SEC-WO01

[0304] - 23 -

[0305] 5

[0306] 15

[0307]

[0308] 20

[0309]

[0310] I-2-32 25

[0311] I-2-33

[0312] I-2-34 35

[0313]

[0314] Foreignfiling_text_P24-240-SEC-WO01

[0315] - 24 -

[0316] 0

[0317] 0

[0318] 5

[0319] 0

[0320] 0

[0321] 0

[0322] 0

[0323]

[0324] in which

[0325] R11 and R12 each, independently of one another, denote an alkyl or an alkoxy 15 group having 1 to 6 C atoms or an alkenyl or an alkenyloxy group having 2 to 6 C atoms in which one or more CH2groups are optionally substituted by -C=C-, -CF2O-, -OCF2-, -CH=CH-,

[0326] 20

[0327]

[0328] -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom.

[0329] 25 The compounds of the Formula I-3 are preferably selected from the compounds of the Formulae 1-3-1 to I-3-37:

[0330] 1-3-1

[0331] 0

[0332] I-3-2

[0333]

[0334] 35 Foreignfiling_text_P24-240-SEC-WO01

[0335] - 25 -

[0336] I-3-3

[0337] 5 I-3-4

[0338] I-3-5

[0339] I-3-6 15

[0340] I-3-7

[0341] 20

[0342] I-3-8

[0343]

[0344] 25

[0345] I-3-9

[0346] 1-3-10

[0347] 35 1-3-11

[0348]

[0349] Foreignfiling_text_P24-240-SEC-WO01

[0350] - 26 -

[0351] 5

[0352]

[0353] 1-3-16 0

[0354]

[0355] 1-3-17 5

[0356]

[0357] 5 Foreignfiling_text P24-240-SEC-W001

[0358] - 27 - 5

[0359]

[0360] 15

[0361] 0 5

[0362]

[0363] 5 Foreignfiling_text_P24-240-SEC-WO01

[0364] - 28 -

[0365] 5

[0366] 15

[0367]

[0368] 20

[0369]

[0370] 25

[0371] 35

[0372]

[0373] Foreignfiling_text_P24-240-SEC-WO01

[0374] - 29 -

[0375] in which

[0376] R11 and R12 each, independently of one another, denote an alkyl or an alkoxy group having 1 to 6 C atoms or an alkenyl or an alkenyloxy group 5 having 2 to 6 C atoms in which one or more CH2groups are optionally substituted by -C=C-, -CF2O-, -OCF2-, -CH=CH-,

[0377]

[0378] -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom.

[0379] More preferably the medium according to the invention comprises one or more 15 compounds of the Formula I-4, very preferably selected from the compounds of the Formulae 1-4-1 to I-4-37:

[0380]

[0381] 20

[0382] 25

[0383]

[0384] 35 Foreignfiling_text_P24-240-SEC-WO01

[0385] - 30 -

[0386] I-4-6

[0387] 5

[0388] I-4-7

[0389] I-4-8

[0390] I-4-9 15

[0391] 1-4-10

[0392]

[0393] 20

[0394] 1-4-11

[0395] 25

[0396] 1-4-12

[0397] 1-4-13

[0398] 35 1-4-14

[0399]

[0400] Foreignfiling_text_P24-240-SEC-WO01

[0401] - 31 -

[0402] 5

[0403] 1-4-16

[0404] 1-4-17

[0405] 15

[0406] R111-4-18

[0407]

[0408] 20

[0409] R111-4-19

[0410]

[0411] R11I-4-20 25

[0412] 1-4-21 R11

[0413] I-4-22 R11

[0414]

[0415] 35 Foreignfiling_text_P24-240-SEC-WO01

[0416] - 32 -

[0417] 5

[0418]

[0419] 10

[0420]

[0421]

[0422] 15

[0423]

[0424] 20

[0425]

[0426] 25

[0427]

[0428] 30

[0429]

[0430]

[0431] 35 Foreignfiling_text_P24-240-SEC-WO01

[0432] - 33 -

[0433] I-4-32

[0434] R11

[0435] 5

[0436] I-4-33

[0437] I-4-34

[0438] 15

[0439]

[0440] 20

[0441]

[0442] R11I-4-37 25

[0443]

[0444] in which

[0445] R11 and R12 each, independently of one another, denote an alkyl or an alkoxy group having 1 to 6 C atoms or an alkenyl or an alkenyloxy group having 2 to 6 C atoms in which one or more CH2groups are optionally substituted by -C=C-, -CF2O-, -OCF2-, -CH=CH-,

[0446]

[0447] -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked 35 directly to one another, and in which one or more H atoms may be substituted by a halogen atom. Foreignfiling_text_P24-240-SEC-WO01

[0448] - 34 -

[0449] More preferably the medium according to the invention comprises one or more compounds of the Formula 1-11, very preferably selected from the compounds of the Formulae 1-11-1 to 1-11-20

[0450] 5

[0451] 15

[0452] 2

[0453]

[0454] 0

[0455] 25

[0456]

[0457] 35 Foreignfiling_text_P24-240-SEC-WO01

[0458] - 35 -

[0459] 5

[0460] 15

[0461]

[0462] 20

[0463]

[0464] 25

[0465]

[0466] Foreignfiling_text_P24-240-SEC-WO01

[0467] - 36 -

[0468] 1-11-16

[0469] 5

[0470] 1-11-17

[0471] 1-11-18

[0472] 15

[0473] 1-11-19

[0474] 20 1-11-20

[0475]

[0476] in which

[0477] R11 and R12 each, independently of one another, denote an alkyl or an alkoxy 25 group having 1 to 6 C atoms or an alkenyl or an alkenyloxy group having 2 to 6 C atoms in which one or more CH2groups are optionally substituted by -C=C-, -CF2O-, -OCF2-, -CH=CH-,

[0478]

[0479] -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom.

[0480] More preferably the medium according to the invention comprises one or more 35

[0481] compounds of the Formula 1-12, very preferably selected from the compounds of the Formulae 1-12-1 to 1-12-20 Foreignfiling_text_P24-240-SEC-WO01

[0482] - 37 -

[0483] 1-12-1

[0484] 5

[0485] 1-12-2

[0486] 1-12-3

[0487] 1-12-4 15

[0488] 1-12-5

[0489]

[0490] 20

[0491] 1-12-6

[0492] 25

[0493] 1-12-7

[0494] 1-12-8

[0495] 1-12-9 Foreignfiling_text_P24-240-SEC-WO01

[0496] 5

[0497] 15

[0498]

[0499] 20

[0500] 25

[0501]

[0502] 35 Foreignfiling_text_P24-240-SEC-WO01

[0503] 1-12-18

[0504] 5 1-12-19

[0505] 1-12-20

[0506]

[0507] in which

[0508] R11 and

[0509]

[0510] each, independently of one another, denote an alkyl or an alkoxy group having 1 to 6 C atoms or an alkenyl or an alkenyloxy group 15

[0511] having 2 to 6 C atoms in which one or more CH2groups are optionally substituted by -C=C-, -CF2O-, -OCF2-, -CH=CH-,

[0512]

[0513] 20 -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom.

[0514] The proportion of the compounds of Formula I or its subformulae in the LC medium 25

[0515] is preferably from 0.5 to 40%, very preferably from 1 to 30%, most preferably from 1.5 to 20% by weight.

[0516] The compounds of the general Formula I are prepared by methods known per se, as described in the literature (e.g. in the standard works, such as Houben-Weyl, Methoden der organischen Chemie [Methods of Organic Chemistry], Georg-Thieme- Verlag, Stuttgart) under reaction conditions which are known and are suitable for said reactions. Use can be made of variants which are known per se, but are not mentioned here in greater detail.

[0517] 35

[0518] Further components of the LC medium Foreignfiling_text_P24-240-SEC-WO01

[0519] - 40 -

[0520] In some preferred embodiments, the LC medium may additionally comprise one or more compounds selected from the following Formulae II and III:

[0521] 5

[0522]

[0523] 15

[0524] wherein the individual substituents, independently of each other and on each occurrence identically or differently, have the following meanings:

[0525] 20

[0526]

[0527] 25

[0528]

[0529] 35 Foreignfiling_text_P24-240-SEC-WO01

[0530] - 41 -

[0531] 5

[0532]

[0533] RO has one of the meanings given for R11 and R12 in Formula I,

[0534] to L⁸ each, independently of one another, denote H, F or Cl;

[0535] 15

[0536] denotes a H atom, an alkyl group having 1 to 3 C atoms or an alkenyl group having 2 to 3 C atoms in which one or more non-adjacent CH2 groups are optionally substituted by -C=C-, -CF2O-,

[0537] -OCF2-, -CH=CH-, -O-, -CO-O- or -O-CO- in such a way that O atoms 20 are not linked directly to one another, preferably H or CH3;

[0538] X0 denotes a halogen atom, -CN, -SCN, -NCS or an alkyl or an alkoxy group having 1 to 6 C atoms or an alkenyl or an alkenyloxy group having 2 to 6 C atoms in which one or more H atoms has been 25 substituted by a halogen atom.

[0539] Preferred compounds of the Formula II and III are those wherein

[0540]

[0541] is H.

[0542] Further preferred compounds of the Formula II and III are those wherein RO denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl,

[0543] propyl, butyl, pentyl,

[0544]

[0545] 35

[0546]

[0547] Foreignfiling_text_P24-240-SEC-WO01

[0548] - 42 -

[0549] X⁰ preferably denotes F, CF₃, CHF₂, OCHF₂ or OCF₃, furthermore OCF=CF₂, OCHFCF₃ or Cl, very preferably F.

[0550] In a preferred embodiment, the LC medium comprises one or more compounds of 5

[0551] the Formula II selected from the following subformulae:

[0552] 15

[0553] 20

[0554]

[0555] 25

[0556]

[0557] 35 Foreignfiling_text_P24-240-SEC-WO01

[0558] - 43 -

[0559] II-6

[0560] 5

[0561] II-7

[0562]

[0563] 15

[0564] 20

[0565]

[0566] in which

[0567]

[0568] R⁰ and X⁰ have the meanings given in the Formula II.

[0569] 25

[0570] Preferred compounds are those of the Formula II-1, II-2 and II-3, very preferred those of the Formula II-1 and II-2.

[0571] In the compounds of the Formulae II-1 to II-9 R⁰ preferably denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, propyl, butyl,

[0572]

[0573] 35

[0574]

[0575] Foreignfiling_text_P24-240-SEC-WO01

[0576] - 44 -

[0577] X⁰ preferably denotes F, CF₃, CHF₂, OCHF₂ or OCF₃, furthermore OCF=CF₂, OCHFCF₃ or Cl, very preferably F.

[0578] As examples of particularly preferred compounds of Formula II the following 5

[0579] compounds can be mentioned:

[0580] 11-2-1

[0581] II-2-2

[0582] 15

[0583]

[0584] "alkyl" being an alkyl group with 1 to 6 C atoms, being preferably selected from ethyl, propyl, butyl, pentyl, wherein propyl is 20 particularly preferred.

[0585] In one embodiment, the LC medium contains one or more compounds of the Formula II or their subformulae as described above and below, wherein

[0586]

[0587] is CH3. Very preferably, the LC medium according to this preferred embodiment comprises 25

[0588] one or more compounds of the Formula II selected from the following subformulae:

[0589] IIA-1

[0590]

[0591] 35 Foreignfiling_text_P24-240-SEC-WO01

[0592] - 45 - F H„C F IIA-2 o F F

[0593] 5

[0594] F H3C F IIA-3 R° — ) (^ CF2O — X° F F

[0595] IIA-4 R° 15

[0596] IIA-5 20

[0597] 25 IIA-6

[0598] o IIA-7

[0599]

[0600] F F 35 Foreignfiling_text_P24-240-SEC-WO01

[0601] - 46 -

[0602] 5

[0603]

[0604] 15

[0605] Preferred compounds are those of the Formula IIA-1, IIA-2 and IIA-3, very preferred are those of Formula IIA-1 and IIA-2.

[0606] 20 In the compounds of the Formulae IIA-1 to IIA-9 R⁰ preferably denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, propyl, butyl,

[0607] pentyl,

[0608]

[0609] 25

[0610]

[0611] X⁰ preferably denotes F, CF₃, CHF₂, OCHF₂ or OCF₃, furthermore OCF=CF₂, OCHFCF₃ or Cl, very preferably F.

[0612] The proportion of the compounds of the Formula II in the LC medium is typically from 0 to 30%, very preferably from 1 to 20%, most preferably from 2 to 15% by weight.

[0613] 35

[0614] In a further preferred embodiment, the LC medium comprises one or more compounds of the Formula III selected from the following subformulae: Foreignfiling_text_P24-240-SEC-WO01

[0615] - 47 -

[0616] 5

[0617] 15

[0618]

[0619] 20

[0620]

[0621] 25

[0622]

[0623] 35 Foreignfiling_text_P24-240-SEC-WO01

[0624] 5

[0625] 15

[0626]

[0627] 20

[0628]

[0629] 25

[0630]

[0631] 35 Foreignfiling_text_P24-240-SEC-WO01

[0632]

[0633] Foreignfiling_text_P24-240-SEC-WO01

[0634] - 50 -

[0635] HI-19

[0636] 5

[0637] HI-20

[0638] HI-21 15

[0639]

[0640] III-22

[0641] 20

[0642]

[0643] in which

[0644]

[0645] R⁰ and X⁰ have the meanings given in the Formula III.

[0646] 25 Particularly preferred compounds are those of the Formulae III-1, III-4, III-6, III-16, III-19, III-20 and III-22.

[0647] As examples of particularly preferred compounds of Formula III the following compounds can be mentioned:

[0648] III-6-1

[0649]

[0650] 35 Foreignfiling_text_P24-240-SEC-WO01

[0651]

[0652] 30 "alkyl being an alkyl group with 1 to 6 C atoms, being preferably selected from ethyl, propyl, butyl, pentyl, wherein propyl is particularly preferred.

[0653] In the compounds of the Formulae III-1 to III-22 RO preferably denotes alkyl having 1 35

[0654] to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, propyl, butyl, Foreignfiling_text_P24-240-SEC-WO01

[0655] 5

[0656]

[0657] X0 preferably denotes F, CF3, CHF2, OCHF2 or OCF3, furthermore OCF=CF2, OCHFCF3 or Cl, very preferably F.

[0658] The LC medium may contain one or more compounds of the Formula III or their subformulae as described above and below wherein

[0659]

[0660] is CH3. Very preferably, the LC medium according to this preferred embodiment comprises one or more compounds of the Formula III selected from the following subformulae:

[0661] 15

[0662] IIIA-1

[0663] 20

[0664]

[0665] 25

[0666]

[0667] 35 Foreignfiling_text_P24-240-SEC-WO01

[0668] - 53 -

[0669] 5

[0670] 15

[0671]

[0672] 20

[0673]

[0674] 25

[0675]

[0676] 35 Foreignfiling_text_P24-240-SEC-WO01

[0677] - 54 -

[0678] 5

[0679] IIIA-11

[0680] 15

[0681]

[0682] 20

[0683]

[0684] 25

[0685]

[0686] 35 Foreignfiling_text_P24-240-SEC-WO01

[0687] - 55 -

[0688] IIIA-16

[0689] 5

[0690] IIIA-17

[0691] IIIA-18 15

[0692]

[0693] IIIA-19 20

[0694]

[0695] F F

[0696] 25

[0697]

[0698] 35

[0699] in which

[0700]

[0701] RO and have the meanings given in the Formula III. Foreignfiling_text_P24-240-SEC-WO01

[0702] - 56 -

[0703] Preferred compounds are those of the Formula IIIA-1, IIIA-4, IIIA-6, IIIA-16, IIIA-19 and IIIA-20.

[0704] In the compounds of the Formulae IIIA-1 to IIIA-21 R0 preferably denotes alkyl 5 having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl,

[0705] propyl, butyl, pentyl,

[0706]

[0707] X0 preferably denotes F, CF3, CHF2, OCHF2 or OCF3, furthermore OCF=CF2, OCHFCF3 or Cl, very preferably F.

[0708] 15

[0709] The proportion of the compounds of the Formula III in the LC medium is preferably from 2 to 60%, very preferably from 5 to 50%, most preferably from 10 to 30% by weight.

[0710] 20

[0711] In a further preferred embodiment, the LC medium may additionally comprise one or more compounds selected from the following formulae:

[0712] 25

[0713]

[0714] 35 Foreignfiling_text_P24-240-SEC-WO01

[0715] - 57 -

[0716] 5

[0717] 15

[0718]

[0719] in which R0, X0, L1, L2

[0720]

[0721] and have the meanings given in Formulae II and III; L3 and L4 each, independently of one another, have the meanings given for L1; 20

[0722] Z° denotes -C2H4-, -(CH2)4-, -CH=CH-, -CF=CF-, -C2F4-, -CH2CF2-,

[0723] -CF2CH2-, -CH2O-, -OCH2-, -COO-, -CF2O-, or-OCF2-, in the Formulae V and VI also a single bond; and

[0724] s denotes 0 or 1.

[0725] 25

[0726] The compounds of the Formula IV are preferably selected from the following formulae:

[0727] IVa

[0728]

[0729] 35 Foreignfiling_text_P24-240-SEC-WO01

[0730] IVb

[0731] 5

[0732] IVc

[0733]

[0734] in which

[0735]

[0736] R0 and X0 have the meanings indicated in the Formulae II and III.

[0737] 15

[0738] RO preferably denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, propyl, butyl or pentyl.

[0739]

[0740] preferably denotes F, CF3, CHF2, OCHF2or OCF3, furthermore OCF=CF2, OCHFCF3 or Cl.

[0741] 20

[0742] The compounds of the Formula IVa are preferably represented by the following subformulae:

[0743] IVa-1

[0744] 25

[0745] IVb-1

[0746]

[0747] The compounds of the Formula IVb are preferably represented by the following formulae:

[0748] 35 Foreignfiling_text_P24-240-SEC-WO01

[0749] IVb-1

[0750] 5

[0751] IVb-2

[0752]

[0753] The compounds of the Formulae IVc are preferably represented by the following subformulae:

[0754] OCF3IVc-1

[0755] 15 n-C3H7OCF3IVc-1 a

[0756]

[0757] in which R^ has the meanings indicated in the Formulae II and III and is preferably alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, 20

[0758] n-propyl, n-butyl or n-pentyl.

[0759] The compound(s) of the Formula IVc, in particular of the Formula IVc-1, is (are) preferably employed in the LC media according to the invention in amounts of from 1% 25 to 20% by weight, particularly preferably from 2 to 15% by weight.

[0760] The compounds of the Formula V are preferably selected from the following subformulae:

[0761]

[0762] 35 Foreignfiling_text_P24-240-SEC-WO01

[0763] - 60 -

[0764] 5

[0765]

[0766] 15

[0767] 0

[0768] 5

[0769]

[0770] 5

[0771] in which

[0772]

[0773] R0 and X0 have the meanings indicated in the Formulae II and III. Foreignfiling_text_P24-240-SEC-WO01

[0774] - 61 -

[0775] RO preferably denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, propyl, butyl or pentyl.

[0776]

[0777] preferably denotes F, CF3, CHF2, OCHF2and OCF3, furthermore OCF=CF2, OCHFCF3 and OCH=CF2.

[0778] 5

[0779] The compounds of the Formula VI are preferably selected from the following subformulae:

[0780] Via

[0781] 15 Vlb

[0782] 20

[0783] Vic

[0784]

[0785] 25 Vid

[0786] Vie

[0787]

[0788] in which

[0789]

[0790] R0 and X0 have the meanings indicated in the Formulae II and III.

[0791] 35 Foreignfiling_text_P24-240-SEC-WO01

[0792] - 62 -

[0793] RO preferably denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, n-propyl, n-butyl or n-pentyl.

[0794]

[0795] preferably denotes F, furthermore OCF3, CF3, OCHF2, CHF2, CF=CF2, OCHF2, OCHFCF3 and OCH=CF2;

[0796] 5

[0797] Preferred compounds of the Formulae Via to Vie are those selected from the following subformulae:

[0798] 15

[0799] Vlb-2

[0800] 20

[0801] Vlb-3

[0802]

[0803] 25

[0804] Vld-1

[0805]

[0806] "alkyF being an alkyl group with 1 to 6 C atoms, being preferably selected from ethyl, propyl, butyl, pentyl, wherein propyl is particularly preferred.

[0807] The compounds of the Formula VII are preferably selected from the following 35 subformulae: Foreignfiling_text_P24-240-SEC-WO01

[0808] - 63 -

[0809] Vila

[0810] R°

[0811] 5

[0812]

[0813]

[0814] in which R0 and X0 have the meanings indicated in the Formulae II and III.

[0815] RO preferably denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C 15 atoms, very preferably ethyl, propyl, butyl or pentyl.

[0816]

[0817] preferably denotes F, furthermore OCF3, OCHF2, CF3, CHF2, OCHFCF3and OCH=CF2.

[0818] In some embodiments, the LC medium additionally comprises one or more compounds selected from the following formulae:

[0819] 20

[0820] XVIII

[0821] 25

[0822] XIX

[0823]

[0824] 35 Foreignfiling_text_P24-240-SEC-WO01

[0825] - 64 -

[0826] 5

[0827] 15

[0828]

[0829] 20

[0830]

[0831] 25 R0, L1 to L4, X0 and Y0 have the meanings given in Formulae II and III for R0, L1 to L8, X0 and Y0, respectively, X0 is preferably F, Cl, CF3 , CHF2 , OCHF2 or OCF3, OCF=CF2,

[0832] OCHFCF3,

[0833]

[0834] RO preferably denotes alkyl, alkoxy, oxaalkyl, cycloalkyl, fluoroalkyl or alkenyl, each having up to 6 C atoms.

[0835] Very preferably, the LC medium according to the invention comprises one or more compounds of the following Formula XXa:

[0836] 35 Foreignfiling_text_P24-240-SEC-WO01

[0837] - 65 -

[0838] XXa

[0839]

[0840] 5

[0841] in which R^ denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, propyl, butyl or pentyl and

[0842]

[0843] denotes F, CF3 CHF2 OCHF2 or OCF3, furthermore OCF=CF2, OCHFCF3 or Cl, very preferably F. R^ preferably denotes straight-chain alkyl, in particular ethyl, n-propyl, n-butyl or n-pentyl and very particularly preferably n-propyl.

[0844] The compound(s) of the Formula XX, in particular of the Formula XXa, is (are) preferably employed in the LC media according to the invention in amounts of 0-15% 15

[0845] by weight, particularly preferably 1-10% by weight.

[0846] The compounds of the Formula XXI are preferably represented by the Formulae XXIa to XXI c:

[0847] 20

[0848] XXIa

[0849]

[0850] 25

[0851] XXIb

[0852] XXI c

[0853]

[0854] in which R^ denotes an alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C 35

[0855] atoms, very preferably ethyl, propyl, butyl or pentyl; and Foreignfiling_text_P24-240-SEC-WO01

[0856] - 66 -

[0857] X° denotes F, CF3CHF2OCHF2or OCF3, furthermore OCF=CF2, OCHFCF3 or Cl.

[0858] In a particularly preferred embodiment, the compounds of Formula XXI are represented 5 by the following structures:

[0859] XXI a- 1

[0860] 15

[0861]

[0862] in which R^ denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, propyl, butyl or pentyl. R^ preferably denotes straight-chain alkyl, 20 in particular ethyl, n-propyl, n-butyl or n-pentyl and very particularly preferably n-propyl.

[0863] The compound(s) of the Formula XXI, in particular of the Formula XXIa-1, is (are) preferably employed in the LC media according to the invention in amounts of 0-15% by weight, particularly preferably 1-10% by weight.

[0864] 25

[0865] Further preferably, the LC medium according to the invention comprises one or more compounds of the Formula XXI I la:

[0866] XXIIIa

[0867]

[0868] in which R^ denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms.

[0869] 35

[0870] RO preferably denotes straight-chain alkyl, in particular ethyl, n-propyl, n-butyl or n-pentyl and very particularly preferably n-propyl or cycloalkyl, in particular cylclopentyl. Foreignfiling_text_P24-240-SEC-WO01

[0871] - 67 -

[0872] Preferred specific compounds of Formula XXI I la include, in particular

[0873] 5 XXIIIa-1

[0874] XXI I la-2

[0875]

[0876] The compound(s) of the Formula XXIII, in particular of the Formula XXI I la, is (are) 15

[0877] preferably employed in the LC media according to the invention in amounts of 0.5-5% by weight, particularly preferably 0.5-2% by weight.

[0878] The LC medium may additionally comprise one or more compounds of the Formula XXIV:

[0879] 20

[0880] L1

[0881] XXIV

[0882] 25

[0883]

[0884] in which R0, X0 and L1-6 have the meanings indicated in the Formulae II and III, s denotes 0 or 1, and

[0885]

[0886] 35 Foreignfiling_text_P24-240-SEC-WO01

[0887] - 68 -

[0888] In the Formula XXIV, X^ may also denote an alkyl group having 1 to 6 C atoms or an alkoxy group having 1 to 6 C atoms. The alkyl or alkoxy group is preferably straightchain.

[0889] 5 RO preferably denotes alkyl having 1 to 6 C atoms. X^ preferably denotes F.

[0890] The compounds of the Formula XXIV are preferably selected from the following subformulae:

[0891] XXIVa

[0892] 15

[0893] XXIVb

[0894] 20

[0895] XXIVc

[0896]

[0897] 25

[0898] XXlVd

[0899] XXIVe

[0900]

[0901] 35 Foreignfiling_text_P24-240-SEC-WO01

[0902] - 69 -

[0903] 5

[0904] XXIVh

[0905]

[0906] 15

[0907] in which RO,

[0908]

[0909] and have the meanings indicated in the Formulae II and III. R^ preferably denotes alkyl having 1 to 6 C atoms.

[0910]

[0911] preferably denotes F, and U is 20 preferably F;

[0912] 25

[0913]

[0914] 35 Foreignfiling_text_P24-240-SEC-WO01

[0915] - 70 -

[0916] 5

[0917]

[0918] RO is straight-chain alkyl or alkenyl having 2 to 6 C atoms;

[0919] The LC medium may further comprise one or more compounds of the following for-

[0920] 15 XXV

[0921] XXVI

[0922] 20

[0923]

[0924] in which R1 and X0 have the meanings indicated in the Formulae II and III for R0 and X0, respectively. R1 preferably denotes alkyl having 1 to 6 C atoms or cycloalkyl 25

[0925] having 3 to 6 C atoms, very preferably ethyl, propyl, butyl or pentyl . X0 preferably denotes F, CF3 , CHF2 , OCHF2 or OCF3, furthermore OCF=CF2, OCHFCF3 or Cl, very preferably F. In the Formula XXIV, X0 very particularly preferably denotes Cl.

[0926] The LC medium may further optionally comprise one or more compounds of the following formulae:

[0927] XXVII

[0928] 35

[0929]

[0930] Foreignfiling_text_P24-240-SEC-WO01

[0931] - 71 -

[0932] XXVIII

[0933] 5

[0934] XXIX

[0935] XXX

[0936] 15

[0937]

[0938] in which

[0939] 20

[0940]

[0941]

[0942] 25

[0943] and R1,

[0944]

[0945] X⁰ and Y⁰ have the meanings indicated in the Formulae II and III for R⁰, X⁰ and Y⁰, respectively.

[0946] R1 preferably denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, propyl, butyl or pentyl. X^ preferably denotes F, CF3, CHF2, OCHF2 or OCF3, furthermore OCF=CF2, OCHFCF3 or Cl, very preferably F, and Y⁰ preferably denotes H. In some embodiments, the LC medium according to the invention preferably comprises one or more compounds of the Formula XXIX in 35 which X0 preferably denotes F. Foreignfiling_text_P24-240-SEC-WO01

[0947] - 72 -

[0948] The compounds of the Formula XXVII are preferably selected from the subformulae XXVIla, wherein XXVIIa-1, XXVIIa-2 and XXVIIa-3 are mostly preferred:

[0949] 5

[0950] XXVIIa

[0951] XXVIIa-1

[0952] 15

[0953] XXVIIa-2

[0954]

[0955] 20

[0956] XXVIIa-3

[0957] 25

[0958]

[0959] "alkyl" being an alkyl group with 1 to 6 C atoms.

[0960] The compounds of the Formula XXVIII are preferably selected from the subformulae XXVIIIa, wherein XXVIIIa-1 and XXVIIIa-2 are mostly preferred:

[0961] XXVIIIa

[0962] 35

[0963]

[0964] Foreignfiling_text_P24-240-SEC-WO01

[0965] - 73 -

[0966] XXVIIIa-1

[0967] 5

[0968] XXVIIIa-2

[0969]

[0970] "alkyl" being an alkyl group with 1 to 6 C atoms.

[0971] 15

[0972] The compound(s) of the Formulae XXVII - XXX is (are) preferably employed in the LC media according to the invention in amounts of 1-20% by weight, particularly preferably 1-15% by weight. Particularly preferred LC media comprise at least one compound of the Formula XXIX and / or the Formula XXX.

[0973] 20

[0974] Very preferably, the LC medium according to the invention comprises one or more compounds of the Formulae XXIXa and / or XXXa:

[0975] 25 XXIXa

[0976] XXXa

[0977]

[0978] in which R^

[0979]

[0980] and have the meanings indicated for R^ and

[0981]

[0982] in the Formulae II and 35

[0983] III, and preferably R1 denotes alkyl having 1 to 6 C atoms or cycloalkyl having 3 to 6 C atoms, very preferably ethyl, propyl, butyl or pentyl. Foreignfiling_text_P24-240-SEC-WO01

[0984] - 74 -

[0985] Preferred specific compounds of Formula XXIXa and XXXa include, in particular

[0986] 5

[0987] XXIXa-2

[0988] XXXa-1 15

[0989]

[0990] XXXa-2 20

[0991]

[0992] The compound(s) of the Formulae XXIXa and / or XXXa is / are preferably employed in 25 the LC media according to the invention in amounts of 0-15% by weight, particularly preferably 1-10% by weight.

[0993] The LC medium may further comprise one or more compounds of the following pyrimidine or pyridine compounds of the following formulae:

[0994] Y°

[0995]

[0996] 35 Foreignfiling_text_P24-240-SEC-WO01

[0997] - 75 -

[0998] 5

[0999]

[1000] in which R

[1001]

[1002] and have the meanings indicated in the Formulae II and III for R⁰, X⁰ and Y⁰, respectively. R1 preferably denotes alkyl having 1 to 6 C atoms or 15 cycloalkyl having 3 to 6 C atoms, very preferably ethyl, propyl, butyl or pentyl. X^ preferably denotes F, CF3, CHF2, OCHF2 or OCF3, furthermore OCF=CF2, OCHFCF3 or Cl, very preferably F and Y^ preferably denotes H. The medium according to the invention particularly may optionally comprise one or more

[1003] 20 compounds of the Formula XXXI-1, in which X^ preferably denotes F. The compound(s) of the Formulae XXXI-1 to XXXI-3 may be employed in the LC media according to the invention in amounts of 1-20% by weight, particularly preferably 1-15% by weight.

[1004] 25

[1005] In addition to the compounds of the Formula I, the LC medium preferably contains one or more compounds of the Formulae N1 and N2:

[1006] N1

[1007]

[1008] 35

[1009] in which Foreignfiling_text_P24-240-SEC-WO01

[1010] - 76 -

[1011] R41 and R42 each, independently of one another, denote an alkyl or an alkoxy group having 1 to 12 C atoms or an alkenyl or an alkenyloxy group having 2 to 12 C atoms in which one or more non-adjacent CH2groups are optionally substituted by -C=C-, -CF2O-, -OCF2-, 5

[1012]

[1013] not linked directly to one another, and in which one or more H atoms may be replaced by a halogen atom or a cycloalkyl or a cycloalkoxy group having 3 to 12 C atoms, in which one or more H atoms may be replaced by a halogen atom,

[1014] preferably R⁴¹ denotes alkyl and R⁴² denotes alkyl or alkoxy or R⁴¹ 15 denotes alkenyl and R⁴² denotes alkyl, wherein one -CH2- group may be replaced by cyclopropylene, 1,3-cyclobutylene, 1,3-cyclopentylene, 1,3-cyclopentenylene, preferably by cyclopropylene or 1,3- cyclopentylene,

[1015] 20

[1016]

[1017] independently of one another and, if

[1018] 25

[1019] occurs twice,

[1020]

[1021] also these independently of one another, denote

[1022] 35

[1023]

[1024] Foreignfiling_text_P24-240-SEC-WO01

[1025] - 77 -

[1026] 5

[1027] 15

[1028]

[1029] 20

[1030] Z⁴¹ and Z⁴² independently of one another and, if Z⁴¹ occurs twice, also these independently of one another, denote -CH₂CH₂-, -COO-, trans-CH=CH-, trans-CF=CF-, -CH₂O-, -CF₂O-, -C≡C- or a single bond, preferably one or more thereof denotes / denote a single bond, and 25

[1031] p denotes 0, 1 or 2, preferably 0 or 1, and

[1032] R⁵¹ and R⁵² independently of one another, have one of the meanings given for R⁴¹ and R⁴² and preferably denote alkyl having 1 to 12 C atoms, preferably n-alkyl, particularly preferably n-alkyl having 1 to 6 C atoms, alkoxy having 1 to 6 C atoms, preferably n-alkoxy, particularly preferably n-alkoxy having 2 to 6 C atoms, alkoxyalkyl, alkenyl or alkenyloxy having 2 to 6 C atoms, preferably having 2 to 4 C atoms, preferably alkenyloxy, wherein one -CH2- group may be replaced by 35

[1033] cyclopropylene, 1,3-cyclobutylene, 1,3-cyclopentylene, 1,3-cyclo- pentenylene, preferably by cyclopropylene or 1,3-cyclopentylene, Foreignfiling_text_P24-240-SEC-WO01

[1034]

[1035] if present, each, independently of one another, denote 5

[1036] 15 F F

[1037]

[1038] or

[1039] preferably

[1040] 20

[1041] F

[1042]

[1043] F

[1044] 25

[1045] or

[1046] preferably

[1047]

[1048] and, if present,

[1049] 35

[1050]

[1051]

[1052] preferably denotes Foreignfiling_text_P24-240-SEC-WO01

[1053] - 79 -

[1054] Z⁵¹ to Z⁵³ each, independently of one another, denote -CH₂-CH₂-, -CH₂-O-, -CH=CH-, -C≡C-, -COO- or a single bond, preferably -CH₂-CH₂-, -CH₂-O- or a single bond and particularly preferably a single bond, 5

[1055] i and j each, independently of one another, denote 0 or 1,

[1056] (i + j) preferably denotes 0, 1 or 2, more preferably 0 or 1 and, most preferably, 1, and

[1057] wherein the one or more, preferably one, of the aromatic rings present may optionally be substituted by an alkyl group, preferably by methyl.

[1058] In some embodiments, the compound of Formula N1 is represented by one of the 15 following formulae:

[1059]

[1060] 20

[1061] 25

[1062]

[1063] 35 Foreignfiling_text_P24-240-SEC-WO01

[1064] - 80 -

[1065] 5

[1066] 15

[1067]

[1068] 20

[1069]

[1070] 25

[1071]

[1072] wherein

[1073] "alkyl" and "alkyl*" each, independently from one another, denote an alkyl group having 1 to 6 C atoms;

[1074] 35 "alkenyl" and "alkenyl*" each, independently of one another, denote an alkenyl group having 2 to 6 C atoms. Foreignfiling_text_P24-240-SEC-WO01

[1075] - 81 -

[1076] Very preferred are compounds of the Formula Z1 and Z2.

[1077] Preferred compounds of the Formulae Z1 to Z11 are those selected from the following subformulae:

[1078] 5

[1079] Z1-1

[1080] Z1-2

[1081] Z1-3 15

[1082] Z2-1

[1083] 20

[1084] Z2-2

[1085]

[1086] 25

[1087] Z2-3

[1088] Z2-4

[1089] Z2-5

[1090]

[1091] 35 Foreignfiling_text_P24-240-SEC-WO01

[1092] - 82 -

[1093] Z2-6

[1094] 5

[1095] Z3-1

[1096] Z4-1

[1097] Z4-2 15

[1098] Z4-3

[1099]

[1100] 20

[1101] Z4-4

[1102]

[1103] Z7-1 25

[1104] Z7-2

[1105] Z7-3

[1106] 35

[1107] C2H5

[1108]

[1109] Z9-1 Foreignfiling_text_P24-240-SEC-WO01

[1110] - 83 -

[1111] 5

[1112] 15

[1113]

[1114] In another preferred embodiment, the LC medium contains one or more compounds 20

[1115] of the Formula Z1 or its preferred subformulae and / or one or more compounds selected from the Formulae Z2, Z3, Z4 and Z5 or their preferred subformulae.

[1116] Preferably, the total proportion of compounds of the Formula Z1, Z2, Z3, Z4, Z5 and 25 Z6 or their subformulae, such as CC-3-V in the medium is from 10 to 65%, very preferably from 20 to 60%, most preferably from 25 to 55% by weight. In yet a more preferred embodiment, the compound of the Formula Z1-1 is used in concentrations ranging from 10 wt.-% to 60 wt.-%, more preferably 25 wt.-% to 50 wt.-%, based on the total weight of the LC medium. In a further preferred embodiment, the LC medium comprises 50 wt.-% to 70 wt.-% of compounds represented by the Formulae Z1-1 and Z4-2 in total.

[1117] Preferably, the medium contains 1, 2 or 3 compounds selected from the Formulae Z1, Z2, Z3 and Z4 or their subformulae.

[1118] 35 Foreignfiling_text_P24-240-SEC-WO01

[1119] - 84 -

[1120] The LC medium may additionally comprise one or more compounds of the following general formulae:

[1121] 5

[1122]

[1123] in which

[1124] R1 and R2 each, independently from one another, denote C1-6-alkyl, C1-6-alkoxy or C2-6-alkenyl.

[1125] The compounds of the Formula XI are preferably selected from the following subformulae:

[1126] 15

[1127]

[1128] 20

[1129] -alkyl

[1130]

[1131] 25

[1132] -alkyl

[1133]

[1134] wherein “alkyl" and “alkyl*" each, independently from one another, denote methyl, ethyl, propyl, butyl, pentyl or hexyl.

[1135] The LC medium may additionally comprise one or more compounds of the following general formulae:

[1136] 35

[1137]

[1138] Foreignfiling_text_P24-240-SEC-WO01

[1139] - 85 -

[1140] in which

[1141] R1 and R2 each, independently of one another, denote n-alkyl, alkoxy, oxaalkyl, fluoroalkyl or alkenyl, each having up to 6 C atoms.

[1142] 5 The compounds of the Formula XII are preferably selected from the following subformulae:

[1143] 15

[1144] 20

[1145]

[1146] in which:

[1147] "alkyl" and "alkyl*" each, independently from one another, denote an alkyl group having 1 to 6 C atoms, preferably methyl, ethyl, propyl, butyl, 25

[1148] pentyl or hexyl.

[1149] Particular preference is given to the compounds of the Formulae XII-1 and XII-3. In the Formula XII-2, "alkyl" preferably, independently of one another, denotes n-C3H7, n-C4H9or n-C5H11, in particular n-C3H7. In the Formula XII-1c, "alkyl" preferably denotes n-C3H7and "alkyl*" is preferably CH3or n-C3H7.

[1150] Particularly preferred compounds of the Formula XII are described by the following structures:

[1151] 35 Foreignfiling_text_P24-240-SEC-WO01

[1152] - 86 -

[1153] 5

[1154] XII-2-1

[1155] XII-3-1

[1156] 15

[1157]

[1158] 20

[1159] The LC medium may additionally comprise one or more compounds selected from the following formulae:

[1160] 25

[1161] XIV

[1162]

[1163] 35 in which

[1164] R1and R2each, independently of one another, denote n-alkyl, alkoxy, oxaalkyl, fluoroalkyl or alkenyl, each having up to 6 C atoms, and Foreignfiling_text_P24-240-SEC-WO01

[1165] - 87 -

[1166] L1and L2denotes, H, F or Cl.

[1167] Preferably, F and R^ each, independently of one another, denote alkyl having 1 to 6 C atoms; in the compound of the Formula XIV, at least one of the substituents F 5

[1168] and R2 preferably denotes alkenyl having 2 to 6 C atoms.

[1169] The LC medium may further optionally comprise one or more compounds of the Formula XIV in which at least one of the substituents R1and R2denotes alkenyl having 2 to 6 C atoms, preferably those selected from the following subformulae:

[1170] XlVa

[1171]

[1172] 15

[1173] XI Vb

[1174]

[1175] XIVc 20

[1176]

[1177] in which the individual substituents have the following meanings:

[1178] "alkyl" and "alkyl*" each, independently from one another, denote an alkyl group having 1 to 6 C atoms, preferably denote methyl, ethyl or propyl; "alkenyl" and "alkenyl*" each, independently of one another, denote alkenyl group having 2 to 6 C atoms.

[1179] The compounds of the Formulae XIV are preferably selected from the following subformulae:

[1180] 30

[1181]

[1182] Foreignfiling_text_P24-240-SEC-WO01

[1183] - 88 -

[1184] XIVd-1

[1185] 5

[1186] XIVe-2

[1187] 15

[1188] XIVe-3

[1189]

[1190] Very preferred are compounds of the Formulae XIVd-1, XIVe-1, XIVe-2 and XIVe-3.

[1191] 20

[1192] The LC medium may further optionally comprise one or more compounds of the Formula XV in which at least one of the substituents F and

[1193]

[1194] denotes alkyl or alkoxy having 2 to 6 C atoms, preferably those selected from the following

[1195] 25 subformulae:

[1196] XVa

[1197] XVb

[1198]

[1199] in which the individual substituents have the following meanings:

[1200] "alkyl" and "alkyl*" each, independently from one another, denote an alkyl group 35 having 1 to 6 C atoms. Foreignfiling_text_P24-240-SEC-WO01

[1201] - 89 -

[1202] The compounds of the Formulae XV are preferably represented by the following subformula:

[1203] XVa

[1204]

[1205] 5

[1206] In yet a further embodiment, the LC medium comprises one or more compounds of the Formula XVI:

[1207]

[1208] in which

[1209] R1and R2each, independently of one another, denote n-alkyl, alkoxy, oxaalkyl, fluoroalkyl or alkenyl, each having up to 6 C atoms, 15 and

[1210] denotes, H, F or Cl.

[1211] Particularly preferred compounds of the Formula XVI are those of the subformulae: 20

[1212] XVI a

[1213] 25 XVIb

[1214] XVI c

[1215] 35 XVI d

[1216]

[1217] Foreignfiling_text_P24-240-SEC-WO01

[1218] - 90 -

[1219] F XVI e alkenyl alkenyl 5

[1220] alkenyl alkenyl XVIf

[1221]

[1222] in which “alkyl" and “alkyl*" each, independently of one another, denote a straight-chain alkyl group having 1 to 6 C atoms, in particular ethyl, propyl or pentyl, and

[1223] “alkenyl" and “alkenyl*" each, independently of one another, denote a straight15 chain alkenyl group having 2 to 6 C atoms, in particular CH2=CHC2H4, CH3CH=CHC2H4, CH2=CH and CH3CH=CH.

[1224] Particular preference is given to the compounds of the Formulae XVIb and XVIc. Very particular preference is given to the compounds of the following subformulae: 20

[1225] XVI b-1

[1226] 25

[1227] XVIb-2

[1228] XVIb-3

[1229]

[1230] 35 Foreignfiling_text_P24-240-SEC-WO01

[1231] - 91 -

[1232] XVI c-1

[1233] H3C

[1234] 5

[1235] XVI c-2

[1236] C2H5

[1237] XVI c-3

[1238] n-C3H7

[1239]

[1240] 15

[1241] In yet a further embodiment, the LC medium comprises one or more compounds of the Formulae XVI'-1 and XVI'-2:

[1242] 20

[1243] XVI -1

[1244] 25 XVI '-2

[1245]

[1246] in which R1 has the meanings indicated for R^ in the Formulae II and III, and preferably each, independently of one another, denote alkyl having 1 to 6 C atoms. L denotes H or F.

[1247] In yet a further embodiment, the LC medium comprises one or more compounds of the Formula XIII:

[1248] 35 Foreignfiling_text_P24-240-SEC-WO01

[1249] - 92 -

[1250] XIII

[1251]

[1252] 5

[1253] in which R1 and R2 have the meanings indicated for R^ in the Formulae II and III, and preferably each, independently of one another, denote alkyl having 1 to 6 C atoms. L denotes H, F or Cl.

[1254] Particularly preferred compounds of the Formula XIII are those of the subformulae:

[1255] Xllla

[1256]

[1257] 15

[1258] Xlllb

[1259]

[1260] 20

[1261] Xlllc

[1262] 25

[1263] Xllld alkenyl alkenyl in which

[1264]

[1265] “alkyr and “alkyl*" each, independently of one another, denote a straight-chain alkyl group having 1 to 6 C atoms, in particular ethyl, propyl or pentyl, and

[1266] “alkenyl" and “alkenyl*" each, independently of one another, denote a straight-chain 35 alkenyl group having 2 to 6 C atoms, in particular Foreignfiling_text_P24-240-SEC-WO01

[1267] - 93 -

[1268] CH2=CHC2H4, CH3CH=CHC2H4, CH2=CH and CH3CH=CH.

[1269] Particular preference is given to the compounds of the Formulae XI I la and XI 11 b.

[1270] 5 Very particular preference is given to the compounds of the following subformulae:

[1271] 15

[1272]

[1273] 20

[1274] 25

[1275] 35

[1276]

[1277] Foreignfiling_text_P24-240-SEC-WO01

[1278] - 94 -

[1279] The LC medium may optionally comprise one or more compounds of the following formulae:

[1280] XVI I a

[1281] 5

[1282] XVIIb

[1283] 15

[1284] XVI Id

[1285] 20 XVI I e

[1286]

[1287] R1and R2each, independently of one another, denote n-alkyl, alkoxy, 25 oxaalkyl, fluoroalkyl or alkenyl, each having up to 6 C atoms, and

[1288] U denotes, H, F or Cl.

[1289] Very preferred are compounds of the Formula XVI la, wherein L is H or F. Very preferred are compounds of the Formula XVIIb, wherein L is F.

[1290] The LC medium may additionally comprise one or more compounds of the following formula:

[1291] 35 Foreignfiling_text_P24-240-SEC-WO01

[1292] - 95 -

[1293] XXXII

[1294]

[1295] wherein

[1296] 5

[1297] R1and R2each, independently of one another, denote n-alkyl, alkoxy, oxaalkyl, fluoroalkyl or alkenyl, each having up to 6 C atoms, and

[1298] L1and L2denotes, H, F or Cl.

[1299] Particularly preferred compounds of the Formula XXXII are those of the subformulae:

[1300] XXXIIa

[1301]

[1302] 15

[1303] XXXIIb

[1304]

[1305] XXXIIc 20

[1306]

[1307] in which

[1308] “alkyl" and “alkyl*" each, independently of one another, denote a straight-chain alkyl group having 1 to 6 C atoms, in particular ethyl, propyl or pentyl, and

[1309] 25

[1310] “alkenyl" denotes a straight-chain alkenyl group having 2 to 6 C atoms, in particular CH2=CHC2H4, CH3CH=CHC2H4, CH2=CH and CH3CH=CH.

[1311] Very particular preference is given to the compounds of the following subformulae:

[1312] XXXIIa-1

[1313]

[1314] 35 Foreignfiling_text_P24-240-SEC-WO01

[1315] - 96 -

[1316] n-C3H7C2H5XXXI la-2

[1317] / 7-C5H-11 C2H5XXXI la-3

[1318] 5

[1319] C2H5XXXIIb-1

[1320] C2H5

[1321] XXXIIb-2

[1322] XXXIIb-3

[1323] 15 O / 1-C3H7

[1324] C2H5

[1325]

[1326] XXXIIb-4

[1327] 20

[1328] n-CaHy

[1329]

[1330] XXXIIc-1

[1331] In some further embodiments, the LC medium comprises one or more compounds of 25

[1332] the following formulae:

[1333] R2XXXV

[1334]

[1335] in which R1 and R2 each, independently from one another, have the meanings indicated in the Formula I for R^ and R^2 and preferably each, independently of one another, denote alkyl having 1 to 6 C atoms.

[1336] 35

[1337] Very particular preference is given to the compounds of the following subformulae: Foreignfiling_text_P24-240-SEC-WO01

[1338] - 97 -

[1339] n-C3H7A7-C3H7

[1340] XXXV- 1

[1341] 5 n-CsHy n-CzjHg XXXV-2

[1342] XXXV-3 n-C3H7n-CsHii

[1343]

[1344] Advantageously, the LC medium of the present invention may comprise one or more compounds of the Formula LP1

[1345] 15

[1346] LP1

[1347]

[1348] 20

[1349] and / or one or more compounds of the Formula LP2

[1350] 25 LP2

[1351]

[1352] in which the individual substituents have the following meanings:

[1353] R0and R2each, independently of one another, denote an alkyl or an alkoxy group having 1 to 12 C atoms or an alkenyl or an alkenyloxy group having 2 or 12 C atoms in which one or more non-adjacent CH2groups are optionally substituted by -C=C-, -CF2O-, -OCF2-,

[1354] 35

[1355] -

[1356]

[1357] CH=CH-, Foreignfiling_text_P24-240-SEC-WO01

[1358] - 98 -

[1359]

[1360] ' — ', -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a cycloalkyl or a cycloalkoxy group having 3 to 5 12 C atoms;

[1361] XO has one of the meanings given

[1362]

[1363] in for in the Formulae II and III; yO denote H or CH3; and

[1364] m and n denotes 0 or 1.

[1365] The one or more compounds of the Formulae LP1 and LP2 may be preferably described by the following Formulae:

[1366] 15 LP1-1

[1367] LP1-2 20

[1368]

[1369] LP2-1 25

[1370] LP2-2

[1371] LP2-3 35

[1372]

[1373] Foreignfiling_text_P24-240-SEC-WO01

[1374] - 99 -

[1375] in which

[1376] R° is an alkyl or an alkoxy group having 1 to 6 C atoms or an alkenyl group having 2 to 6 C atoms in which one or more CH2 groups are

[1377] 5 optionally substituted by -C=C-, -CF2O-, -OCF2-, -CH=CH-,

[1378]

[1379]

[1380] -, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom;

[1381] R2is an alkyl group having 1 to 6 C atoms, in which one or more CH2groups are optionally substituted by -C=C-, -CF2O-, -OCF2-, 15

[1382] -

[1383]

[1384] CH=CH-,

[1385]

[1386] -, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, and in which one or more H atoms 20

[1387] may be substituted by a halogen atom;

[1388] xo a F atom or an alkyl or an alkoxy group having 1 to 3 C atoms or an alkenyl or an alkenyloxy group having 2 or 3 C atoms in which one or more H atoms are replaced by a F atom; and

[1389] 2

[1390]

[1391] 5 H orCH3.

[1392] The compounds of the general Formulae LP1 and LP2 can also be represented by one of the following structures:

[1393] OCmH2m+i

[1394] LP1a

[1395] OCmH2m+i

[1396] 3

[1397]

[1398] 5 Foreignfiling_text_P24-240-SEC-WO01

[1399] - 100 - 0CmH2m+1

[1400] LP1c 5 0CmH2m+1

[1401] LP1d0CmH2m+1

[1402] LP1e

[1403] LP1f 15

[1404] LP1g LP1h 20

[1405] CmFl2m+1

[1406] LP1i

[1407]

[1408] 25 LP1j CnH2n-n CmH2m+1 LP1k CnH2n+1 OCmF2m+i LP2a R° 0CmF2m+i 3

[1409]

[1410] 5 LP2b Foreignfiling_text_P24-240-SEC-WO01

[1411] - 101 -

[1412] LP2c

[1413] 5

[1414] LP2d

[1415] LP2e

[1416] LP2f

[1417] 15 LP2g

[1418]

[1419] LP2h

[1420] 20 in which

[1421] RO is an alkyl or an alkoxy group having 1 to 12 C atoms in which one or more

[1422] CH2groups are optionally substituted by -C=C-, -CF2O-, -OCF2-,

[1423]

[1424] 25

[1425]

[1426] -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom, preferably an alkyl group having 1 to 4 C atoms, alkenyl or an alkenyloxy group having 2 to 6 C atoms or a cycloalkyl or a cycloalkyloxy group having 3 to 6 C atoms, wherein vinyl, allyl or cyclopentyl are particularly preferable;

[1427] n denotes 1, 2, 3, 4 or 5; and

[1428] 35 m denotes 1, 2, 3 or 4. Foreignfiling_text_P24-240-SEC-WO01

[1429] - 102 -

[1430] Particularly preferred compounds of the Formula LP1 are those selected from the group consisting of the following subformulae:

[1431] 5

[1432] 15

[1433]

[1434] 20

[1435]

[1436] 25

[1437] LP1-1g

[1438]

[1439] 35 Foreignfiling_text_P24-240-SEC-WO01

[1440] - 103 -

[1441] Y° LP1-1h

[1442] 5 Y° LP1-1i 3

[1443] LP1-1j

[1444] 15

[1445] LP1-1k

[1446]

[1447] 20

[1448] LP1-1l

[1449] 25

[1450]

[1451] wherein Y⁰ is H or CH₃, preferably H.

[1452] Particularly preferred compounds of the Formula LP2 are those selected from the group consisting of the following subformulae:

[1453] LP2-1a 35

[1454]

[1455] Foreignfiling_text_P24-240-SEC-WO01

[1456] - 104 -

[1457] LP2-1b

[1458] 5

[1459] LP2-1C

[1460] LP2-1d

[1461] 15

[1462] LP2-1e

[1463]

[1464] 20

[1465] LP2-1f

[1466]

[1467] 25

[1468] LP2-1g

[1469] LP2-1h

[1470]

[1471] 35 Foreignfiling_text_P24-240-SEC-WO01

[1472] - 105 -

[1473] 5

[1474] 15

[1475]

[1476] 20

[1477]

[1478] wherein

[1479]

[1480] is H or CH3, preferably H.

[1481] 25

[1482] Very preferred are compounds of the Formulae LP2-1a, LP2-1b, LP2-1c, LP2-1d, and LP2-1 i, LP2-2b, LP2-3a, LP2-3c mostly preferred is the compound Formula LP2- 1b.

[1483] Preferably, the LC medium comprises one or more compounds of the Formula LP1 and one or more compounds of the Formula LP2.

[1484] The total proportion of the compounds of the Formula LP1 or its subformulae in the LC medium is preferably from 0 to 35%, very preferably from 1 to 25%, mostly 35

[1485] preferred from 2 to 15% by weight. The total proportion of the compounds of the Foreignfiling_text_P24-240-SEC-WO01

[1486] - 106 -

[1487] Formula LP2 or its subformulae in the LC medium is preferably from 0 to 35%, very preferably from 1 to 25%, mostly preferred from 2 to 15% by weight.

[1488] Optionally, the LC medium may also comprise one or more compounds of Formula 5 P:

[1489]

[1490] in which the individual substituents, on each occurrence identically or differently, and each, independently of one another, have the following meanings:

[1491] 15

[1492]

[1493] 20

[1494]

[1495] R1 and R2 each, independently of one another, denote a H atom, a halogen 25 atom, -CN, -SCN, -NCS, an alkyl or an alkoxy group having 1 to 12 C atoms or an alkenyl or an alkenyloxy group having 2 to 12 C atoms in which one or more non-adjacent CH2groups are optionally substituted

[1496] by -C=C-, -CF2O-, -OCF2-, -CH=CH-,

[1497]

[1498] -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be replaced by a 35 halogen atom or a cycloalkyl or a cycloalkoxy group having 3 to 12 C atoms, in which one or more H atoms may be replaced by a halogen atom; Foreignfiling_text_P24-240-SEC-WO01

[1499] - 107 -

[1500] L1to L4each, independently of one another, denote H, F or Cl;

[1501] Y1to Y3each, independently of one another, denote a H atom, an alkyl group having 1 to 3 C atoms or an alkenyl group having 2 to 3 C atoms in which one or more non-adjacent CH2groups are optionally

[1502] 5

[1503] substituted by -C≡C-, -CF2O-, -OCF2-, -CH=CH-, -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, preferably H or CH3;

[1504] Z1denotes -CF2O-, -OCF2-, -CH2O-, -OCH2-, -CO-O-, -O-CO-, -C2H4-,

[1505] -C2F4-, -CF2CH2-, -CH2CF2-, -CFHCFH-, -CFHCH2-, -CH2CFH-, - CF2CFH-, -CFHCF2-, -CH=CH-, -CF=CH-, -CH=CF-, -CF=CF-, -C=C- or a single bond;

[1506] k denotes 0, 1, 2 or 3.

[1507] 15

[1508] Preference is furthermore given to compounds of the Formula P in which k denotes 0, 1 or 2, particularly preferably 0 or 1. Preference is furthermore given to compounds of the Formula P in which k denotes 0, 1 or 2, preferably 1 or 2 and very particularly preferably 1.

[1509] 20

[1510] in Formula P particularly preferably denotes phenylene-1,4-diyl, which may also be mono- or polysubstituted by F, furthermore cyclohexane-1,4-diyl, cyclo- hexenylene-1,4-diyl, tetrahydropyran-2,5-diyl or 1,3-dioxane-2,5-diyl.

[1511] 25

[1512] Z^ in Formula P particularly preferably denotes -CF2O-, -OCF2- or a single bond, wherein a single bond is particularly preferred.

[1513] Preference is furthermore given to compounds of the Formula P in which F and R^ each, independently of one another, denote H, F, Cl, -CN, -SCN, -NCS, SF5, halogen, or alkyl, alkenyl or alkynyl having up to 8, preferably up to 5 C atoms, each of which is optionally substituted by halogen, in particular by F.

[1514] 35 Particularly preferred groups F and R^ in Formula P denote alkyl, alkenyl, alkynyl or alkoxy having up to 12, preferably up to 8 C atoms, each of which is optionally substituted by halogen, in particular by F, particularly preferred are alkyl, alkenyl or Foreignfiling_text_P24-240-SEC-WO01

[1515] - 108 -

[1516] alkynyl having up to 8 C atoms. Preferably, at least one group is not H, particularly preferably both groups R1 and R2 are not H. R1 is very particularly preferably equal to alkyl. R^ is furthermore preferably H, alkyl, alkyl which is substituted by at least one fluorine or fluorine. Very particularly preferably, R^ is alkyl and R^ is H or alkyl.

[1517] 5

[1518] R1, R2 each, independently of one another, very particularly preferably denote unbranched alkyl having 1 to 5 C atoms. If R^ and R^ denote substituted alkyl, alkoxy, alkenyl or alkynyl, the total number of C atoms in the two groups R1 and R2 is preferably less than 10.

[1519] Preferred alkyl groups are, for example, methyl, ethyl, n-propyl, n-butyl, n-pentyl, n-hexyl, n-heptyl and n-octyl.

[1520] Preferred alkenyl groups are, for example, ethenyl, propenyl, butenyl and pentenyl.

[1521] 15

[1522] Preferred alkynyl groups are, for example, ethynyl, propynyl, butynyl, pentynyl, hexynyl, heptynyl and octynyl.

[1523] Preferred alkoxy groups are, for example, methoxy, ethoxy, n-propoxy, n-butoxy, 20

[1524] n-pentoxy, n-hexoxy, n-heptoxy, n-octoxy.

[1525] Halogen preferably denotes F or Cl, F being mostly preferred.

[1526] 25 Particularly preferred compounds of the Formula P are those selected from the following sub-formulae:

[1527] P-1-1

[1528]

[1529] 35 Foreignfiling_text_P24-240-SEC-WO01

[1530] - 109 -

[1531] 5

[1532]

[1533] 15

[1534] 20

[1535]

[1536] 25

[1537]

[1538] in which Y1, Y2, R1and R2and L1to L6have the meanings indicated in general Formula P.

[1539] In a preferred embodiment,

[1540] 35 Foreignfiling_text_P24-240-SEC-WO01

[1541] - 110 -

[1542] R1an alkyl or an alkoxy group having 1 to 6 C atoms or an alkenyl or an alkenyloxy group having 2 to 6 C atoms in which one or more CH2groups are optionally substituted by -C=C-, -CF2O-, -OCF2-,

[1543] 5

[1544] -CH=CH-,

[1545]

[1546] , -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom;

[1547] R2a halogen atom, -CN, -SCN, -NCS, an alkyl or an alkoxy group having 1 to 6 C atoms or an alkenyloxy or an alkenyl group having 2 to 6 C atoms in which one or more CH2 groups are optionally substituted

[1548] 15 by -C=C-, -CF2O-, -OCF2-, -CH=CH-,,

[1549]

[1550] -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom; 20

[1551] and Y2each, independently from one another, denote a H atom or a methyl group, preferably a H atom; and

[1552] L1to L6each, independently from one another, denote a H atom, F or Cl.

[1553] 25 R1 and R2may denote optionally fluorinated alkyl or alkoxy having 1 to 12 C atoms, optionally fluorinated alkenyl or alkynyl having 2 to 12 C atoms, optionally fluorinated cycloalkyl having 3 to 12 C atoms.

[1554]

[1555] and Y2are preferably a H atom or a methyl group.

[1556] Particularly preferred are optionally fluorinated alkyl, alkenyl or alkynyl having up to 5 C atoms. L2in the Formulae P-1-1 to P-1-6 preferably denotes F. In the Formulae P- 1-4 to P-1-6, L3to L6preferably denote H.

[1557] 35 In a particularly preferred embodiment, the compounds of Formula P are selected from the following structures: Foreignfiling_text_P24-240-SEC-WO01

[1558] - 111 -

[1559] P-1-4-1 5

[1560]

[1561] where R1has the same meaning as in the general Formula P;

[1562] R2denotes a straight-chain or branched alkyl or alkoxy group having 1 to 6 C atoms, or an akenyl, alkenyloxy, alkoxyalkyl group having 2 to 6 C atoms, or a cycloalkyl or a cycloalkoxy group having 3 to 12 C atoms, in which one or more non-adjacent CH2 groups are optionally 15 substituted b

[1563]

[1564] y -C=C-, -CF2O-, -OCF2-, -CH=CH-,

[1565] ,

[1566]

[1567] 0><0>,, -O-, -CO-O- or-O-CO- in such a way that O atoms are not linked directly to one another, and in 20 which one or more H atoms may be substituted by a halogen atom;

[1568] alternatively,

[1569] R2is X°, wherein

[1570] X0 a F atom or an alkyl or an alkoxy group having 1 to 3 C atoms or an alkenyl or an alkenyloxy group having 2 or 3 C atoms in which one or 25

[1571] more H atoms are replaced by a F atom; and

[1572] L1and L2both denote a F atom or, alternatively, L1denotes a F atom and L2denotes a H atom; and

[1573] Y1and Y2each, independently from one another, denote a H atom or a straight

[1574]

[1575] chain or branched alkyl group having 1 to 3 C atoms.

[1576] LC media according to the present invention having a particularly advantageous properties are obtainable with the following compounds of the general Formula P:

[1577] 35 Foreignfiling_text_P24-240-SEC-WO01

[1578] - 112 -

[1579] P-2-1 5

[1580] P-2-2

[1581] P-2-3 15

[1582] P-2-4 20

[1583] P-2-5 25

[1584] P-2-6

[1585]

[1586] 35 Foreignfiling_text_P24-240-SEC-WO01

[1587] - 113 -

[1588] P-2-7

[1589] P-2-8

[1590] P-2-9

[1591] P-2-10

[1592] P-2-11

[1593] P-2-12

[1594]

[1595] Foreignfiling_text_P24-240-SEC-WO01

[1596] - 114 -

[1597] R1R2P-2-15 5

[1598] R1R i2' P-2-20

[1599] F F

[1600] R12 P-2-21 15

[1601] F

[1602] R1R.2‘ P-2-22 20

[1603] R1R 2' P-2-23 25

[1604] R1R,2' P-2-24

[1605]

[1606] 35 Foreignfiling_text_P24-240-SEC-WO01

[1607] - 115 -

[1608] P-2-25 5 F F

[1609] R1P-2-26

[1610] F

[1611] R12 P-2-27 15

[1612] R1P-2-28 20

[1613] R

[1614] 2512 P-2-29

[1615] R1P-2-30

[1616]

[1617] 35 Foreignfiling_text_P24-240-SEC-WO01

[1618] - 116 -

[1619] 5

[1620]

[1621] 0

[1622]

[1623] 5

[1624] P-2-36

[1625] P-2-37

[1626]

[1627] Foreignfiling_text_P24-240-SEC-WO01

[1628] - 117 -

[1629] P-2-38

[1630]

[1631] 5

[1632] wherein Y1, Y2, R1and R2are as defined above.

[1633] In one preferred embodiment of the present invention, the LC medium comprises one or more compound of Formula P-2-4 and / or one or more compound of Formula P-2-7.

[1634] In yet a further preferred embodiment, LC media comprise the following compounds of Formula P:

[1635] 15

[1636] P-3-1

[1637] 20

[1638] P-3- 1a

[1639] 25 P-3- 1b

[1640] P-3-2

[1641] P-3-2a

[1642] 35

[1643]

[1644] Foreignfiling_text_P24-240-SEC-WO01

[1645] - 118 -

[1646] P-3-2b

[1647] 5

[1648] P-3-3

[1649] P-3-4

[1650]

[1651] P-3-5 15

[1652]

[1653] P-3-5a

[1654] 0

[1655] P-3-5b

[1656] 5

[1657] P-3-6

[1658] P-3-7

[1659]

[1660] 5 Foreignfiling_text_P24-240-SEC-WO01

[1661] - 119 - P-3-8 P-3-9 P-3-9a P-3-9b P-3-10 P-3-11 P-3-11a P-3-11b

[1662]

[1663] Foreignfiling_text_P24-240-SEC-WO01

[1664] - 120 -

[1665] F

[1666] P-3-12

[1667] F 5

[1668] P-3- 12a

[1669] P-3-12b

[1670]

[1671] P-3-13 15

[1672] P-3-14

[1673] P-3-15 0

[1674] P-3-16

[1675] 5

[1676] P-3-17

[1677] CnH2n+1P-3-18

[1678] P-3-19 5 CnH2n+1

[1679]

[1680] Foreignfiling_text_P24-240-SEC-WO01

[1681] - 121 -

[1682] wherein n and m each, independently of one another, denote 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12.

[1683] Mostly preferred compounds of Formula P include, in particular, one or more of the 5 following:

[1684] P-3-5-1

[1685] P-3-9-1

[1686] 15

[1687] P-3-9- 1a

[1688] 0

[1689] P-3-9- 1b

[1690] 5 P-3-9-2

[1691] P-3-9-2a

[1692] P-3-9-2b

[1693]

[1694] Foreignfiling_text_P24-240-SEC-WO01

[1695] - 122 -

[1696] P-3-9-2c

[1697] 5

[1698] P-3-9-3

[1699] P-3-9-3a

[1700] 15

[1701] P-3-9-3b

[1702]

[1703] P-3-9-4 20

[1704]

[1705] P-3-9-4a 25

[1706] P-3-9-5

[1707] P-3-9-5a

[1708]

[1709] 35 Foreignfiling_text_P24-240-SEC-WO01

[1710] - 123 -

[1711] P-3-9-6

[1712] 5

[1713] P-3-9-7

[1714] F

[1715] P-3-9-7a

[1716] F

[1717] P-3-9-7b 15

[1718] H3C F

[1719] P-3-9-8

[1720]

[1721] 20

[1722] P-3-9-8a

[1723]

[1724] 25

[1725] P-3-9-8b

[1726] F

[1727] P-3-9-9

[1728] F

[1729] P-3-9-9a 35

[1730]

[1731] Foreignfiling_text_P24-240-SEC-WO01

[1732] - 124 -

[1733] n-C P-3-9-9b

[1734]

[1735] As a further possibility, the following compounds of Formula P can be used:

[1736] P-3-22-1

[1737] P-3-22-2 5

[1738] C2H5

[1739] P-3-22-3 0

[1740] F

[1741] C2H5

[1742] P-3-22-4 5 F

[1743] P-3-22-5

[1744] P-3-22-6

[1745]

[1746] 5 Foreignfiling_text P24-240-SEC-W001

[1747] - 125 -

[1748] P-3-22-7

[1749] P-3-22-8

[1750] 0

[1751] P-3-22-9

[1752] 5

[1753] P-3-22-10

[1754] 0

[1755] P-3-22-11

[1756] 5

[1757] P-3-22-12

[1758] 0

[1759] P-3-22-13

[1760] 5 P-3-22-14

[1761]

[1762] Foreignfiling_text_P24-240-SEC-WO01

[1763] - 126 -

[1764] P-3-22-15

[1765] 10 P-3-22-17

[1766] 15

[1767] P-3-22-19 20

[1768] 25

[1769]

[1770] As a further possibility, the following compounds of Formula P can be used:

[1771] 35 P-3-23-1

[1772]

[1773] Foreignfiling_text_P24-240-SEC-WO01

[1774] - 127 -

[1775] P-3-23-2

[1776] P-3-23-3 5

[1777] P-3-23-4

[1778] P-3-23-5

[1779] 15 P-3-23-6

[1780]

[1781] P-3-23-7 20

[1782]

[1783] P-3-23-8

[1784] 25

[1785] P-3-23-9

[1786] P-3-23-10

[1787] P-3-23-11

[1788]

[1789] 35 Foreignfiling_text_P24-240-SEC-WO01

[1790] - 128 - P-3-23-12 5

[1791]

[1792] 5 0 5

[1793]

[1794] 5 Foreignfiling_text_P24-240-SEC-WO01

[1795] - 129 -

[1796] P-3-6-1

[1797] P-3-6-2

[1798] P-3-6-3

[1799] 5

[1800] P-3-6-3a

[1801] 0 P-3-6-4

[1802] P-3-6-5

[1803] F

[1804] P-3-7-1

[1805] F

[1806] P-3-7-2

[1807] F

[1808] P-3-7-3

[1809]

[1810] Foreignfiling_text_P24-240-SEC-WO01

[1811] - 130 -

[1812] P-3-7-4

[1813] 5 P-3-7-5

[1814]

[1815] Very preferred are the compounds of formulae P-3-9-2 and P-3-5-1.

[1816] The proportion of the compounds of Formula P or its subformulae in the LC medium may range from 0 to 40%, very preferably from 1 to 30%, most preferably from 2 to 20% by weight.

[1817] 15 Compounds of Formula B

[1818] In a further preferred embodiment, the LC medium may further comprise one or more compounds of Formula B:

[1819] 20

[1820] B

[1821]

[1822] 25

[1823] in which the individual substituents, on each occurrence identically or differently, and each, independently of one another, have the following meanings:

[1824]

[1825] 35

[1826] wherein Foreignfiling_text_P24-240-SEC-WO01

[1827] - 131 -

[1828] R1 and R2 each, independently of one another, denote one of the meanings given for R^ and R^ in the Formula P;

[1829] Z1-CH2O-, -O-, -C2H4-, -OCH2-, or a single bond;

[1830] Y1-CH2-, -CH2CH2-, -CH=CH-, -CH2O-, -O- or -S-;

[1831] 5

[1832] and L2H, F or Cl, preferably H or F, very preferably F;

[1833] k 0 or 1.

[1834] In a preferred embodiment of the present invention, the one or more compounds of the Formula B is selected from the following subformulae:

[1835] 15

[1836]

[1837]

[1838] 20

[1839]

[1840] 25

[1841] wherein Y1, L1, L2, R1and R2have the meanings given in the Formula B.

[1842] Preferred compounds of the Formula B1 are selected from the following subformulae:

[1843] B1-1

[1844]

[1845] 35 Foreignfiling_text_P24-240-SEC-WO01

[1846] - 132 -

[1847] B1-2

[1848] 5

[1849] B1-3

[1850] B1-4

[1851] B1-5 15

[1852]

[1853] wherein R^ and R^ independently denote a straight-chain alkyl group having 1 to 6 20

[1854] C atoms, in which one or more CH2 groups are optionally substituted by -C=C-,

[1855] -

[1856]

[1857] CF2O-, -OCF2-, -CH=CH-,

[1858] 25

[1859]

[1860] , -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be replaced by a halogen atom.

[1861] Very preferred are compounds of the Formula B1-1 and B1-2 wherein both groups (O) denote an oxygen atom and R^ and R^ independently denote an alkyl group being methyl, ethyl, propyl, butyl, pentyl or hexyl, which are preferably straight- chained. Very preferably one “alkyl" is ethyl and the other “alkyl*" is n-pentyl.

[1862] 35 Particularly preferred are compounds of the Formula B1-2. Foreignfiling_text_P24-240-SEC-WO01

[1863] - 133 -

[1864] Preferably, the compounds of the Formula B1-1 are selected from the group of compounds of the Formulae B1-1-1 to B1-1-11, preferably of the Formula B1-1-6:

[1865] 5

[1866] 15

[1867]

[1868] 20

[1869]

[1870] 25

[1871] alkyl O-alkenyl B1-1-7

[1872]

[1873] 35 Foreignfiling_text_P24-240-SEC-WO01

[1874] - 134 -

[1875] B1-1-8

[1876] 5

[1877] B1-1-9

[1878] B1-1-10

[1879]

[1880] “alkyl" and “alkyl*" each, independently of one another, denote a straight-chain 15

[1881] alkyl group having 1 to 6 C atoms,

[1882] “alkenyl" and “alkenyl*" each, independently of one another, denote a straight-chain alkenyl group having 2 to 6 C atoms,

[1883] “alkoxy” and “alkoxy*" each, independently of one another, denote a straight-chain 20 alkoxy group having 1 to 6 C atoms.

[1884] Preferably, the compounds of the Formula B1-2 are selected from the group of compounds of Formulae B1-2-1 to B1-2-10, preferably of Formula B1-2-6:

[1885] 25

[1886]

[1887] 35 Foreignfiling_text_P24-240-SEC-WO01

[1888] - 135 -

[1889] B1-2-3

[1890] 5

[1891] 15

[1892]

[1893] 20

[1894] 25

[1895]

[1896] in which

[1897] “alkyl" and “alkyl*" each, independently of one another, denote a straight-chain alkyl group having 1 to 6 C atoms,

[1898] 35 “alkenyl” and “alkenyl*’ each, independently of one another, denote a straight-chain alkenyl group having 2 to 6 C atoms, Foreignfiling_text_P24-240-SEC-WO01

[1899] - 136 -

[1900] “alkoxy” and “alkoxy*" each, independently of one another, denote a straight-chain alkoxy group having 1 to 6 C atoms.

[1901] Optionally, the LC medium comprises one or more compounds of the Formula B1-1A 5 and / or B1-2A:

[1902]

[1903] 15 (O) denotes O or a single bond,

[1904] RIHA denotes alkyl or alkenyl having up to 7 C atoms or a group Cy- CmH2m+1'’

[1905] m and n are, identically or differently, 0, 1, 2, 3, 4, 5 or 6, preferably 1, 2 or 3, very preferably 1,

[1906] 20 Cy denotes a cycloaliphatic group having 3, 4 or 5 ring atoms, which is optionally substituted with alkyl or alkenyl each having up to 3 C atoms, or with halogen or CN, and preferably denotes cyclopropyl, cyclobutyl or cyclopentyl.

[1907] 25

[1908] The compounds of the Formulae B1-1A and / or B1-2A are contained in the medium either alternatively or in addition to the compounds of the Formulae B1-1 and B1-2, preferably additionally.

[1909] Preferred compounds of the Formulae B1-1A and / or B1-2A are also the following:

[1910] B1-1A-1 alkoxy

[1911]

[1912] 35 Foreignfiling_text_P24-240-SEC-WO01

[1913] - 137 -

[1914] B1-1A-2 alkoxy

[1915] 5

[1916] B1-1A-3 alkoxy

[1917] B1-2A-1 alkoxy

[1918]

[1919] B1-2A-2 alkoxy

[1920] 15

[1921]

[1922] B1-2A-3 alkoxy

[1923]

[1924] 20

[1925] in which alkoxy denotes a straight-chain alkoxy group having 1 to 6 C atoms or alternatively -(CH2)nF in which n is 2, 3, 4, or 5, preferably C2H4F.

[1926] The proportion of the compounds of the Formula B1 or its subformulae in the LC 25

[1927] medium is preferably from 1 to 20%, very preferably from 1 to 15% by weight.

[1928] Preferably, the LC medium contains 1, 2 or 3 compounds of the Formula B1 or its subformulae.

[1929] In a preferred embodiment of the present invention, the LC medium may comprise one or more compounds of the Formula B2-2

[1930] 35

[1931]

[1932] Foreignfiling_text_P24-240-SEC-WO01

[1933] - 138 -

[1934] in which

[1935] R1 and R2 identically or differently, denote H, an alkyl or alkoxy group having 1 to 6 C atoms, in which one or more CH2 groups in these groups are optionally replaced, independently of one another, by -C=C-, -CF2O-, - 5

[1936]

[1937] that O atoms are not linked directly to one another, and in which, in addition, one or more H atoms may be replaced by halogen.

[1938] The compounds of the Formula B2-2 are preferably selected from the group of compounds of the Formulae B2-2-1 to B2-2-10:

[1939] 15

[1940]

[1941] 20

[1942]

[1943] 25

[1944] B2-2-4

[1945] B2-2-5

[1946]

[1947] 35 Foreignfiling_text_P24-240-SEC-WO01

[1948] - 139 -

[1949] B2-2-6

[1950] 5

[1951] 15

[1952]

[1953] 20

[1954] in which R2 denotes alkyl having 1 to 6 C-atoms, preferably ethyl, n-propyl or n- butyl, or alternatively cyclopropylmethyl, cyclobutylmethyl or cyclopentylmethyl or alternatively -(CH2)nF in which n is 2, 3, 4, or 5, preferably C2H4F.

[1955] 25

[1956] Particularly preferred compounds of the Formula B2 are selected from the following subformulae:

[1957] B2-2-11

[1958] B2-2-12 35

[1959]

[1960] Foreignfiling_text_P24-240-SEC-WO01

[1961] - 140 -

[1962]

[1963] 5

[1964] The proportion of the compounds of the Formula B2 or its subformulae in the LC medium is preferably from 1 to 20%, very preferably from 1 to 15% by weight.

[1965] Preferably, the LC medium contains 1, 2 or 3 compounds of the Formula B2 or its subformulae.

[1966] Preferred compounds of the Formula B3 are selected from the following subformulae:

[1967] 15

[1968] B3-1

[1969]

[1970] 20

[1971] B3-2

[1972]

[1973] wherein

[1974]

[1975] has one of the meanings given in the Formula B3 and preferably 25

[1976] denotes straight-chain alkyl having 1 to 6 C atoms, very preferably methyl, ethyl, propyl, butyl, pentyl or hexyl, more preferably ethyl or propyl, most preferably propyl, and x1 has one of the meanings given in the Formula B3 and preferably denotes CF3, CHF2, OCF3or OCHF2.

[1977] Preferred compounds of the Formula B3 are selected from the following subformulae:

[1978] 35 Foreignfiling_text_P24-240-SEC-WO01

[1979] - 141 -

[1980] B3-1-1

[1981] 5

[1982] B3-1-2

[1983] B3-2-1

[1984] 15

[1985] B3-2-2

[1986]

[1987] wherein R¹ has one of the meanings given in the Formula B3 and preferably 20

[1988] denotes straight-chain alkyl having 1 to 6 C atoms, very preferably methyl, ethyl, propyl, butyl, pentyl or hexyl, more preferably ethyl or propyl, most preferably propyl.

[1989] Most preferred compound of the Formula B3-2-2 is B3-2-2-1.

[1990] 25

[1991] B3-2-2-1

[1992]

[1993] In a preferred embodiment, the LC medium contains one or more compounds of the Formula B or its subformulae B1, B2, B3, B1-1, B1-2, B2-1, B2-2, B2-3, B3-1, B3-2, B3-1-1, B3-1-2, B3-2-1 and B3-2-2 wherein the dibenzofuran or dibenzothiophene group is substituted by a methyl or methoxy group, preferably by a methyl group, 35 preferably in p-position to the substituent F, very preferably in p-position to the substituent F ( / .e. in m-position to the terminal group R² or X¹). Foreignfiling_text_P24-240-SEC-WO01

[1994] - 142 -

[1995] The proportion of the compounds of the Formula B3 or its subformulae in the LC medium is preferably from 1 to 20%, very preferably from 1 to 10% by weight.

[1996] Preferably, the LC medium contains 1, 2 or 3 compounds of the Formula B3 or its 5 subformulae.

[1997] Preferably, the total proportion of compounds of the Formula B or their subformulae in the LC medium is from 2 to 25%, very preferably from 3 to 20% by weight.

[1998] In some preferred embodiments, the LC medium may additionally comprise one or more compounds of the Formulae YA, YB, YC, YD, YE, YF and YG:

[1999] YA

[2000] 15

[2001] 20 YB

[2002] R23

[2003] 25 YC

[2004]

[2005] R23

[2006] 35 Foreignfiling_text_P24-240-SEC-WO01

[2007] - 143 -

[2008] 5

[2009]

[2010] 15

[2011] in which the individual substituents have the following meanings:

[2012] R²¹ denotes an alkyl or an alkoxy group having 1 to 12 C atoms or an 20

[2013] alkenyl or an alkenyloxy group having 2 to 12 C atoms in which one or more non-adjacent CH2 groups are optionally substituted by -C=C-,

[2014] -

[2015]

[2016] CF2O-, -OCF2-, -CH=CH-, 25

[2017]

[2018] , -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be replaced by a halogen atom or a cycloalkyl or a cycloalkoxy group having 3 to 12 C atoms, in which one or more H atoms may be replaced by a halogen atom;

[2019] R²² denotes an alkyl or an alkoxy group having 1 to 6 C atoms or an alkenyl or an alkenyloxy group having 2 to 6 C atoms in which one or more non-adjacent CH2groups are optionally substituted by -C=C-,

[2020] 35

[2021] -

[2022]

[2023] CF2O-, -OCF2-, -CH=CH-, Foreignfiling_text_P24-240-SEC-WO01

[2024] - 144 -

[2025]

[2026] atoms are not linked directly to one another, and in which one or more H atoms may be replaced by a halogen atom or a cycloalkyl or a 5 cycloalkoxy group having 3 to 6 C atoms, in which one or more H atoms may be replaced by a halogen atom;

[2027] L¹ to L³ each, independently of one another, denote F, Cl, CF₃ or CHF₂; L⁴ and L⁵ each, independently of one another, denote H or F;

[2028] R23 denotes a H atom, an alkyl group having 1 to 3 C atoms or an alkenyl group having 2 to 3 C atoms in which one or more non-adjacent CH2 groups are optionally substituted by -C=C-, -CF2O-,

[2029] -OCF2-, -CH=CH-, -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, preferably H or CH3;

[2030] 15

[2031] Z¹ and Z² each, independently of one another, denote a single bond,

[2032] -CH2CH2-, -CH=CH-, -CF2O-, -OCF2-, -CH2O-, -OCH2-, -COO-, -OCO-, -C2F4-, -CF=CF-, -CH=CHCH2O;

[2033] p 0, 1 or 2; and

[2034] 20

[2035] q 0 or 1.

[2036] In a preferred embodiment, the one or more compounds of Formula YA are selected from the group consisting of the following formulae:

[2037] 25

[2038] alkyl alkyl YA-1

[2039] YA-2

[2040] 35 YA-3

[2041]

[2042] Foreignfiling_text_P24-240-SEC-WO01

[2043] - 145 -

[2044] Cl F YA-4

[2045] 5

[2046] YA-5

[2047] YA-6

[2048] 15

[2049] YA-7

[2050] 20

[2051] YA-8

[2052] 25 YA-9

[2053] YA- 10

[2054] YA- 11

[2055]

[2056] 35 Foreignfiling_text_P24-240-SEC-WO01

[2057] - 146 -

[2058] YA- 12

[2059] 5

[2060] YA- 13

[2061] YA- 14

[2062] 15

[2063] YA- 15

[2064]

[2065] 20

[2066]

[2067] 25

[2068] 35

[2069]

[2070] Foreignfiling_text_P24-240-SEC-WO01

[2071] YA-20

[2072] YA-21

[2073] O-alkyl YA-22 alkyl

[2074] YA-23

[2075] YA-24

[2076] YA-25

[2077] O-alkyl YA-26 alkenyl

[2078]

[2079] Foreignfiling_text_P24-240-SEC-WO01

[2080] - 148 -

[2081] YA-27

[2082] 5

[2083] YA-28

[2084]

[2085] YA-29

[2086] 15

[2087] YA-30

[2088] 0

[2089] YA-31

[2090] 5 YA-32

[2091] YA-33

[2092]

[2093] YA-34 5

[2094]

[2095] Foreignfiling_text_P24-240-SEC-WO01

[2096] - 149 -

[2097] 5

[2098] 15

[2099]

[2100] 20

[2101]

[2102] 25

[2103]

[2104] 35 Foreignfiling_text_P24-240-SEC-WO01

[2105] - 150 -

[2106] YA-43

[2107] 5

[2108] YA-44

[2109] YA-45

[2110] 15 YA-46

[2111]

[2112] 20

[2113] YA-47

[2114]

[2115] 25

[2116] YA-48

[2117] YA-49

[2118] 35 YA-50

[2119]

[2120] Foreignfiling_text_P24-240-SEC-WO01

[2121] YA-51

[2122]

[2123] 5

[2124] YA-52

[2125] 10

[2126]

[2127] YA-53

[2128] 15

[2129]

[2130] YA-54 alkyl 20

[2131]

[2132] YA-55 alkyl 25

[2133]

[2134] YA- 56 O-alkyl 30

[2135] YA-57 alkyl

[2136]

[2137] Foreignfiling_text_P24-240-SEC-WO01

[2138] - 152 - YA-58

[2139] YA-59

[2140] YA-60

[2141] YA-61

[2142] YA-62

[2143] YA-63

[2144] YA-64

[2145]

[2146] Foreignfiling_text_P24-240-SEC-WO01

[2147] alkyl YA-65

[2148] YA-66

[2149] YA-67

[2150] YA-68 YA-69

[2151] YA- 70

[2152]

[2153] Foreignfiling_text_P24-240-SEC-WO01

[2154] - 154 -

[2155] 5

[2156] 15

[2157] H3C YA-74 20

[2158] 25 YA-75

[2159] YA-76

[2160]

[2161] 35 Foreignfiling_text_P24-240-SEC-WO01

[2162] - 155 -

[2163] 5

[2164] 15

[2165]

[2166] 20

[2167]

[2168] 25

[2169]

[2170] 35 Foreignfiling_text_P24-240-SEC-WO01

[2171] - 156 -

[2172] 5

[2173]

[2174] 15

[2175] YA-86

[2176] 20

[2177]

[2178] YA-87

[2179] 25

[2180] YA-88

[2181] YA-89

[2182]

[2183] 35 Foreignfiling_text_P24-240-SEC-WO01

[2184] - 157 -

[2185] YA-90

[2186] 5 YA-91

[2187] YA-92

[2188] YA-93

[2189] 15

[2190]

[2191] in which

[2192] a denotes 1 or 2,

[2193] alkyl and alkyl* each, independently of one another, denote a straight-chain alkyl 20

[2194] group having 1 to 6 C atoms,

[2195] alkenyl denotes a straight-chain alkenyl group having 2 to 6 C atoms, and (O) denotes an oxygen atom or a single bond, and

[2196] 25 alkenyl preferably denotes CH2=CH-, CH2=CHCH2CH2-, CH3-CH=CH-, CH3-CH2- CH=CH-, CH3-(CH2)2-CH=CH-, CH3-(CH2)3-CH=CH- or

[2197] CH3-CH=CH-(CH2)2-.

[2198] Particularly preferred LC media according to the invention comprise one or more compounds selected from the group consisting of formulae YA-2, YA-8, YA-10, YA- 16, YA-18, YA-36, YA-37, YA-38, YA-39, YA-40, YA-41, YA-42, YA-43, YA-77, YA- 78, YA-88, YA-90 and YA-92.

[2199] 35 Preferably, the one or more compounds of Formula YA-2 are preferably selected from the following subformulae: Foreignfiling_text_P24-240-SEC-WO01

[2200] YA-2-1

[2201] 5

[2202] YA-2-2

[2203] YA-2-3

[2204] YA-2-4 15

[2205] YA-2-5

[2206]

[2207] 20

[2208] Alternatively, preferably in addition to the compounds of the formulae YA-2-1 to YA- 2-5, the LC medium comprises one or more compounds of the following formulae:

[2209] 25

[2210] YA-2a-1

[2211] YA-2a-2

[2212] 35 YA-2a-3

[2213]

[2214] Foreignfiling_text_P24-240-SEC-WO01

[2215] YA-2a-4

[2216] 5

[2217] YA-2a-5

[2218] YA-2a-6

[2219]

[2220] 15

[2221] Further preferably, the LC medium comprises one or more compounds of the formula YA-10 selected from the following sub-formulae:

[2222] 20

[2223] YA- 10-1

[2224]

[2225] YA- 10-2 25

[2226] YA- 10-3

[2227] YA- 10-4

[2228]

[2229] 35 Foreignfiling_text_P24-240-SEC-WO01

[2230] - 160 -

[2231] YA- 10-5 n-C3H7

[2232]

[2233] 5 Alternatively, preferably in addition to the compounds of the formulae YA-10-1 to YA-10-5, the LC medium comprises one or more compounds of the following formulae:

[2234] YA-10a-1

[2235] YA-10a-2

[2236] 15

[2237] YA-10a-3

[2238] 20

[2239] YA-10a-4

[2240]

[2241] 25

[2242] YA-10a-5 OC2H5

[2243] YA- 10a-6

[2244] 5

[2245]

[2246] 35 Foreignfiling_text_P24-240-SEC-WO01

[2247] - 161 -

[2248] Further preferably, the LC medium comprises one or more compounds of the formula YA-37 selected from the following sub-formulae:

[2249] 5 YA-37-1

[2250] YA-37-2

[2251] YA-37-3

[2252] 15

[2253] YA-37-4

[2254] 20

[2255] YA-37-5

[2256]

[2257] Alternatively, preferably in addition to the compounds of the formulae YA-37-1 to YA- 25

[2258] 37-5, the LC medium comprises one or more compounds of the following formulae:

[2259] YA-37a-1

[2260] YA-37a-2

[2261]

[2262] 35 Foreignfiling_text_P24-240-SEC-WO01

[2263] - 162 -

[2264] YA-37a-3

[2265] 5 YA-37a-4

[2266] YA-37a-5

[2267] 15 YA-37a-6

[2268]

[2269] YA-37a-7 20

[2270]

[2271] Further preferably, the LC medium comprises one or more compounds of the formula 25 YA-41 selected from the following sub-formulae:

[2272] YA-41-1

[2273] YA-41-2

[2274]

[2275] 35 Foreignfiling_text_P24-240-SEC-WO01

[2276] 5

[2277]

[2278] Further preferably, the LC medium comprises one or more compounds of the formula YA-66 selected from the following subformulae:

[2279] 15

[2280] YA-66-1

[2281]

[2282] 20

[2283] YA-66-2

[2284] 25

[2285] YA-66-3 7

[2286] YA-66-4 7 35

[2287]

[2288] Foreignfiling_text_P24-240-SEC-WO01

[2289] YA-66-5

[2290] 5

[2291]

[2292] Further preferably, the LC medium comprises one or more compounds of the formula YA-67 selected from the following sub-formulae:

[2293] YA-67-1

[2294] 15

[2295] YA-67-2

[2296] 20

[2297] YA-67-3

[2298]

[2299] 25

[2300] YA-67-4

[2301] YA-67-5

[2302] 3

[2303]

[2304] 5 Foreignfiling_text_P24-240-SEC-WO01

[2305] - 165 -

[2306] YA-67-6

[2307]

[2308] 5

[2309] Further preferably, the LC medium comprises one or more compounds of the formula YA-77 selected from the following sub-formulae:

[2310] YA-77-1

[2311] 15

[2312] YA-77-2

[2313] 20

[2314] YA-77-3

[2315]

[2316] 25

[2317] YA-77-4

[2318] YA-77-5

[2319]

[2320] 35 Foreignfiling_text_P24-240-SEC-WO01

[2321] - 166 -

[2322] Further preferably, the LC medium comprises one or more compounds of the formula YA-90 selected from the following sub-formulae:

[2323] 5 YA-90-1

[2324] YA-90-1 10

[2325] YA-90-2

[2326] 15

[2327] YA-90-3

[2328] 20

[2329] YA-90-3

[2330]

[2331] 25

[2332] YA-90-4

[2333]

[2334] In another preferred embodiment, the LC medium comprises one or more

[2335] 30 compounds of the formula YB selected from the group consisting of formulae YB-1 to YB-39:

[2336] YB-1

[2337] 35

[2338]

[2339] Foreignfiling_text_P24-240-SEC-WO01

[2340] YB-2

[2341]

[2342] 5

[2343] YB-3 alkyl-O O-alkyl

[2344]

[2345] Cl F YB-4 10 alkyl alkyl

[2346]

[2347] YB-5 15

[2348]

[2349] YB-6

[2350] 20

[2351]

[2352] YB-7

[2353]

[2354] 25

[2355] YB-8 alkenyl alkyl

[2356] 30

[2357] YB-9 alkenyl O-alkyl

[2358] E F

[2359] 35 YB-10 alkyl alkyl

[2360]

[2361] Foreignfiling_text_P24-240-SEC-WO01

[2362] - 168 - YB-11 alkyl O-alkyl 5

[2363] YB-12 YB-13 15

[2364] YB-14 YB-15 20

[2365] 30

[2366]

[2367] Foreignfiling_text_P24-240-SEC-WO01

[2368] - 169 -

[2369] (O)alkyl* YB-19

[2370] 5

[2371] YB-20

[2372] YB-21

[2373] 15

[2374] YB-22

[2375] 20 YB-23

[2376] YB-24 25

[2377] YB-25

[2378] YB-26 O-alkyl

[2379]

[2380] 35 Foreignfiling_text_P24-240-SEC-WO01

[2381] 5

[2382]

[2383] 15

[2384]

[2385] 0

[2386] 5

[2387]

[2388] 5 Foreignfiling_text_P24-240-SEC-WO01

[2389] - 171 -

[2390] YB-35

[2391] 5 YB-36

[2392] 15

[2393] 2

[2394]

[2395] 0

[2396] in which

[2397] alkyl and alkyl* each, independently of one another, denote a straight-chain alkyl radical having 1 to 6 C atoms,

[2398] alkenyl denotes a straight-chain alkenyl radical having 2 to 6 C atoms, and 25 (O) denotes an oxygen atom or a single bond, and

[2399] alkenyl preferably denotes CH2=CH-, CH2=CHCH2CH2-, CH3-CH=CH-, CH3-CH2- CH=CH-, CH3-(CH2)2-CH=CH-, CH3-(CH2)3-CH=CH- or

[2400] CH3-CH=CH-(CH2)2-.

[2401] Particularly preferred LC media according to the invention comprise one or more compounds selected from the group consisting of formulae YB-2, YB-11, YB-17 and YB-34.

[2402] 35

[2403] Preferably, the LC medium comprises one or more compounds of the formula YB-11 selected from the following sub-formulae: Foreignfiling_text_P24-240-SEC-WO01

[2404] - 172 -

[2405] YB-11-1 C2H5OC2H5

[2406] 5

[2407] YB-11-2 n-C3H7 OC2H5

[2408] YB-11-3 C2H5O-n-C3H7

[2409] 15 YB-11-4

[2410] n-C3H7 O-n-C3H7

[2411] YB-11-5 n-C3H7 O-n-C4H9

[2412]

[2413] 0

[2414] Alternatively, preferably in addition to the compounds of the formulae YB-11-1 to YB- 11-5, the LC medium comprises one or more compounds of the following formulae: 25

[2415] YB-11a-1

[2416] YB-11a-2

[2417]

[2418] 35 Foreignfiling_text_P24-240-SEC-WO01

[2419] - 173 -

[2420] YB-11a-3

[2421] 5

[2422] 15 YB-11a-6

[2423]

[2424] Preferably, the LC medium comprises one or more compounds of the formula YB-17 20

[2425] selected from the following sub-formulae:

[2426] YB-17-1 OC2H525

[2427] YB-17-2

[2428]

[2429] The LC medium may comprise one or more compounds of the formula YB-34 selected from the following sub-formulae:

[2430] YB-34-1 35

[2431]

[2432] Foreignfiling_text_P24-240-SEC-WO01

[2433] YB-34-2

[2434]

[2435] 5

[2436] In another preferred embodiment the LC medium comprises one or more compounds of the formula YC selected from the following formulae:

[2437] YC-1

[2438] YC-2

[2439] 15

[2440]

[2441] in which alkyl and alkyl* each, independently of one another, denote a straight-chain alkyl radical having 1 to 6 C atoms.

[2442] 20

[2443] The LC medium may comprise one or more compounds of the formula YC-1 and YC- 2 selected from the following sub-formulae:

[2444] 25

[2445] 35

[2446]

[2447] Foreignfiling_text_P24-240-SEC-WO01

[2448] - 175 -

[2449] YC-1-4

[2450] 5

[2451] YC-2-1

[2452] YC-2-2

[2453]

[2454] 15 In another preferred embodiment, the LC medium comprises one or more compounds of the formula YD selected from the group consisting of the following formulae

[2455] 20

[2456] 25 YD-2

[2457] YD-3

[2458] YD-4

[2459]

[2460] 35 Foreignfiling_text_P24-240-SEC-WO01

[2461] - 176 -

[2462] YD-5

[2463] 5

[2464] YD-6

[2465] YD-7

[2466] 15 YD-8

[2467] (O)alkyl*

[2468]

[2469] 20

[2470] YD-9 (O)alkyl*

[2471]

[2472] 25

[2473] YD- 10 (O)alkyl*

[2474] YD- 11 (O)alkyl*

[2475]

[2476] 35 Foreignfiling_text_P24-240-SEC-WO01

[2477] - 177 -

[2478] YD- 12 (O)alkyl*

[2479] 5

[2480] YD- 13 (O)alkyl*

[2481]

[2482] YD- 14

[2483] 15

[2484] YD-15

[2485] 20

[2486] YD- 16 alkyl

[2487]

[2488] 25

[2489] YD- 18 (O)alkyl

[2490]

[2491] 35 Foreignfiling_text_P24-240-SEC-WO01

[2492] YD-19 5

[2493] YD-20 10

[2494] YD-21 15 YD-22 20 YD-23

[2495] YD-24 25 30 YD-25

[2496]

[2497] Foreignfiling_text_P24-240-SEC-WO01

[2498] - 179 -

[2499] YD-26 (O)alkyl

[2500] 5

[2501] YD-27 (O)alkyl

[2502] YD-28 (O)alkyl

[2503] 15

[2504] YD-29 (O)alkyl

[2505]

[2506] 20

[2507] YD-30 (O)alkyl

[2508]

[2509] 25

[2510] YD-31 (O)alkyl

[2511] YD-32

[2512]

[2513] 35

[2514] in which Foreignfiling_text_P24-240-SEC-WO01

[2515] - 180 -

[2516] alkyl and alkyl* each, independently of one another, denote a straight-chain alkyl group having 1 to 6 C atoms,

[2517] alkenyl denotes a straight-chain alkenyl group having 2 to 6 C atoms, (O) denotes an oxygen atom or a single bond,

[2518] 5 Y denotes H or CH3 and

[2519] alkenyl preferably denotes CH2=CH-, CH2=CHCH2CH2-, CH3-CH=CH-, CH3-CH2- CH=CH-, CH3-(CH2)2-CH=CH-, CH3-(CH2)3-CH=CH- or

[2520] CH3-CH=CH-(CH2)2-.

[2521] Further preferred LC media according to the invention comprise one or more compounds of the formula YD-1 and / or YD-4.

[2522] 15 Further preferred LC media according to the invention comprise one or more compounds of the formula YD, wherein q is 0, Y is H and R22denotes an alkyl or alkoxy radical having 1 to 6 C atoms wherein one CH2group is optionally replaced by a cyclopropyl, cyclobutyl, cyclopentyl or cyclopentenyl group, preferably selected from formulae YD-1, YD-16, YD-17, YD-18, YD-19, YD-20, YD-21, YD-22, YD-23 20

[2523] and YD-24, very preferably selected from formulae YD-1, YD-17, YD-22, YD-23 and YD-24.

[2524] Very preferred compounds of the formula YD are compounds selected from the 25 following subformulae:

[2525]

[2526] 35 Foreignfiling_text_P24-240-SEC-WO01

[2527] - 181 -

[2528] YD-11-3 OCVH2V+1

[2529] YD- 11-4 OCVH2V+I

[2530]

[2531] 0

[2532] YD-11-5 OCVH2V+15

[2533]

[2534] YD-11-6 0

[2535]

[2536] YD-11-7 5

[2537] YD-11-8

[2538] YD-11-9

[2539]

[2540] Foreignfili ng_text P24-240-S EC- WO01

[2541] - 182 -

[2542] 5

[2543] YD-11-12 5

[2544] 0 YD-11-13

[2545]

[2546] 5

[2547] YD-11-14

[2548] YD-11-15

[2549]

[2550] 5 Foreignfiling_text_P24-240-SEC-WO01

[2551] - 183 -

[2552] YD-11-16

[2553] YD-11-17

[2554] YD-11-18

[2555] YD-11-19

[2556] YD- 11-20 OCvH2v+1 25

[2557] YD-11-21 OCVH2V+I 30

[2558] YD-11-22 35

[2559]

[2560] Foreignfiling_text_P24-240-SEC-WO01

[2561] - 184 -

[2562] YD-11-23

[2563] 5

[2564] YD- 11-24

[2565] YD-11-25 15

[2566]

[2567] YD- 11-26 20

[2568]

[2569] YD-11-27 25

[2570] YD-11-28

[2571]

[2572] 35 Foreignfiling_text_P24-240-SEC-WO01

[2573] - 185 -

[2574] YD-11-29

[2575] 5

[2576] YD-11-30

[2577] YD-11-31

[2578] 15

[2579]

[2580] YD- 11-32 20

[2581]

[2582] wherein v is 1, 2, 3, 4, 5 or 6.

[2583] 25

[2584] In a preferred embodiment, the LC medium comprises one or more compounds of formula YD-11a

[2585] YD-11a

[2586]

[2587] 35 in which R21, Y and q have the meanings given in formula YD, and R23 is Foreignfiling_text_P24-240-SEC-WO01

[2588] - 186 -

[2589] , in which r is 0, 1, 2, 3, 4, 5 or 6 and s is 1, 2 or 3.

[2590]

[2591] Preferred compounds of formula YD-11a are selected from the following subformulae:

[2592] 5

[2593] YD-11a-1

[2594] YD-11a-2

[2595] 15

[2596] YD-11a-3

[2597] 20

[2598]

[2599] YD-11a-4 25

[2600] YD-11a-5

[2601]

[2602] 35 Foreignfiling_text_P24-240-SEC-WO01

[2603] - 187 -

[2604] YD-11a-6

[2605] 5

[2606] YD-11a-7

[2607] YD-11a-8

[2608] 15

[2609] YD-11a-9

[2610]

[2611] 20

[2612] YD-11a-10

[2613] 25

[2614] YD-11a-11

[2615] YD-11a-12

[2616] 35

[2617]

[2618] Foreignfillns_texLP24-240-SEC-WO01

[2619] - 188 -YD-11a-13 YD-1la.i5YD-1ia.i6

[2620]

[2621] Foreignfiling_text_P24-240-SEC-WO01

[2622] - 189 -

[2623] YD-11a-19

[2624] YD-11a-20

[2625] YD-11a-21

[2626]

[2627] 5

[2628] YD-11a-22

[2629] 0

[2630]

[2631] YD-11a-23

[2632] 5

[2633] YD-11a-24

[2634]

[2635] YD-11a-25 5

[2636]

[2637] Foreignfiling_text_P24-240-SEC-WO01

[2638] - 190 -

[2639] YD-11a-26

[2640] 5

[2641] YD-11a-27

[2642] YD-11a-28 15

[2643]

[2644] In a preferred embodiment, the LC medium comprises one or more compounds of the 20 formula YE selected from the group consisting of the following formulae:

[2645] 25

[2646] YE-2

[2647] YE-3

[2648]

[2649] 35 Foreignfiling_text_P24-240-SEC-WO01

[2650] - 191 -

[2651] YE-4

[2652] 5

[2653] YE-5

[2654] YE-6

[2655] 15

[2656] YE-7

[2657]

[2658] YE-8 20

[2659]

[2660] YE-9 25

[2661] YE- 10

[2662] YE- 11

[2663]

[2664] 35 Foreignfiling_text_P24-240-SEC-WO01

[2665] - 192 -

[2666] YE- 12

[2667] 5

[2668] 15

[2669] YE- 16 20 alkenyl O-alkyl

[2670] 25

[2671] 35

[2672]

[2673] Foreignfiling_text_P24-240-SEC-WO01

[2674] - 193-

[2675] O-alkyl YE-26 alkenyl

[2676]

[2677] Foreignfiling_text_P24-240-SEC-WO01

[2678] - 194 -

[2679] YE-27

[2680] 5

[2681] YE-28

[2682] YE-29 O-alkyl*

[2683] 15

[2684] YE-30 O-alkyl*

[2685] 20

[2686] YE-31 alkenyl

[2687] 25 YE-32 alkenyl

[2688] YE-33

[2689] YE-34 35

[2690]

[2691] Foreignfiling_text_P24-240-SEC-WO01

[2692] 5

[2693]

[2694] 15

[2695]

[2696] 0

[2697] 0

[2698]

[2699] Foreignfiling_text_P24-240-SEC-WO01

[2700] - 196 -

[2701] YE-43

[2702] 5

[2703] YE-44

[2704] YE-45

[2705] 15

[2706] YE-46

[2707]

[2708] 20

[2709] YE-47

[2710]

[2711] 25

[2712] YE-48

[2713] YE-49

[2714]

[2715] 35 Foreignfiling_text_P24-240-SEC-WO01

[2716] - 197 -

[2717] YE-50

[2718] 5

[2719] YE-51

[2720] YE- 52

[2721] 15

[2722] YE-53

[2723]

[2724] 20

[2725] YE- 54 O-alkyl

[2726] 25

[2727] YE-55 alkyl

[2728] YE- 56 O-alkyl

[2729]

[2730] 35 Foreignfiling_text_P24-240-SEC-WO01

[2731] - 198 -

[2732] YE-57

[2733] 5

[2734] YE-58 O-alkyl

[2735] YE-59 O-alkyl

[2736] 15 YE-60

[2737]

[2738] 20

[2739] YE-61

[2740] 25

[2741] YE-62 H3C

[2742] YE-63

[2743]

[2744] 35 Foreignfiling_text_P24-240-SEC-WO01

[2745] - 199 - YE-64

[2746] YE-65

[2747] YE-66

[2748] YE-67

[2749] YE-68

[2750] YE-69

[2751]

[2752] Foreignfiling_text_P24-240-SEC-WO01

[2753] YE-70 alkyl

[2754] 5

[2755] YE-71

[2756] YE-72

[2757]

[2758] 15

[2759] YE-73 20

[2760]

[2761] YE-74 25

[2762] YE-75

[2763] YE-76 35 (O)alkyl* alkyl

[2764]

[2765] Foreignfiling_text_P24-240-SEC-WO01

[2766] - 201 -

[2767] YE-77 (O)alkyl alkenyl

[2768] 5

[2769] 15

[2770] in which

[2771]

[2772] denotes 1 or 2, alkyl and alkyl* each, independently of one another, denote a straight-chain alkyl 20 group having 1 to 6 C atoms,

[2773] alkenyl denotes a straight-chain alkenyl group having 2 to 6 C atoms, and (O) denotes an oxygen atom or a single bond, and

[2774] alkenyl preferably denotes CH2=CH-, CH2=CHCH2CH2-, CH3-CH=CH-,

[2775] 25

[2776] CH3-CH2-CH=CH-, CH3-(CH2)2-CH=CH-, CH3-(CH2)3-CH=CH- or

[2777] CH3-CH=CH-(CH2)2-.

[2778] Particularly preferred LC media according to the invention comprise one or more compounds selected from the group consisting of formulae YE-2, YE-8, YE-10, YE- 16, YE- 18, YE-37, YE-38, YE-39 and YE-40.

[2779] Preferably, the LC medium comprises one or more compounds of the formula YE-2 selected from the following sub-formulae:

[2780] 35 Foreignfiling_text_P24-240-SEC-WO01

[2781] YE-2-1

[2782] 5

[2783] YE-2-2

[2784] YE-2-3

[2785] YE-2-4

[2786] 15

[2787]

[2788] YE-2-5 20

[2789]

[2790] Preferably, the LC medium comprises one or more compounds of the formula YE-10 selected from the following sub-formulae:

[2791] 25

[2792] YE- 10-1

[2793] YE- 10-2

[2794] 35 YE- 10-3

[2795]

[2796] Foreignfiling_text_P24-240-SEC-WO01

[2797] - 203 -

[2798] 5

[2799]

[2800] In another preferred embodiment, the LC medium comprises one or more compounds of the formula YF selected from the group consisting of the following formulae:

[2801] YF-1 15

[2802]

[2803] YF-2

[2804]

[2805] 20

[2806] YF-3

[2807] 25

[2808]

[2809] in which

[2810] alkyl and alkyl* each, independently of one another, denote a straight-chain or branched alkyl group having 1 to 6 C atoms.

[2811] Preferably, the LC medium comprises one or more compounds of the formula YF-2 35 selected from the following sub-formulae: Foreignfiling_text_P24-240-SEC-WO01

[2812] - 204 -

[2813] YF-2-1

[2814] 5

[2815] YF-2-2

[2816] YF-2-3

[2817] 15 YF-2-4

[2818]

[2819] YF-2-5

[2820] 20

[2821]

[2822] Preferably, the one or more compounds of the formula YF-4 are selected from the 25 following sub-formulae:

[2823] YF-4-1

[2824] YF-4-2

[2825]

[2826] 35 Foreignfiling_text_P24-240-SEC-WO01

[2827] YF-4-3 C2H5

[2828] 5

[2829] YF-2-4

[2830] YF-2-5

[2831]

[2832] 15 In a preferred embodiment, the LC medium comprises one or more compounds of the formula YG selected from the group consisting of the following formulae:

[2833] 20 alkyl alkyl YG-1

[2834] alkyl O-alkyl YG-2

[2835] 25

[2836] alkyl-O alkyl YG-3

[2837] alkyl-0 O-alkyl YG-4

[2838]

[2839] 35 Foreignfiling_text_P24-240-SEC-WO01

[2840] - 206 -

[2841] YG-5

[2842] 5

[2843] YG-6 alkenyl O-alkyl

[2844]

[2845] in which

[2846] a denotes 1 or 2,

[2847] alkyl and alkyl* each, independently of one another, denote a straight-chain alkyl group having 1 to 6 C atoms,

[2848] alkenyl denotes a straight-chain alkenyl group having 2 to 6 C atoms, and (O) denotes an oxygen atom or a single bond, and

[2849] 15 alkenyl preferably denotes CH2=CH-, CH2=CHCH2CH2-, CH3-CH=CH-,

[2850] CH3-CH2-CH=CH-, CH3-(CH2)2-CH=CH-, CH3-(CH2)3-CH=CH- or

[2851] CH3-CH=CH-(CH2)2-.

[2852] 20 Particularly preferred LC media according to the invention comprise one or more compounds selected from the group consisting of formulae YG-1, YG-2 and YG-6.

[2853] Preferably, the compounds of the formulae YG-1 YG-2 and YG-6 are selected from the following sub-formulae:

[2854] 25

[2855] YG-1-1

[2856] YG-1 -2

[2857] 35

[2858] YG-2-1

[2859]

[2860] Foreignfiling_text_P24-240-SEC-WO01

[2861] - 207 -

[2862] YG-2-2

[2863] n-C3H7O-C2H5

[2864] 5

[2865] YG-2-3 n-C4H9O-C2H5

[2866] YG-6-1

[2867] O-C2H5

[2868]

[2869] The total content of the compounds of Formulae YA to YG in the LC medium 15 preferably ranges from 0 % to 15 % by weight, more preferably from 0.5 % to 10 % by weight.

[2870] Compounds of Formula ST

[2871] 20

[2872] The LC medium may optionally comprise one or more compounds of the general Formula ST:

[2873] 25

[2874]

[2875] in which in which the individual substituents have the following meanings:

[2876]

[2877] 35 Foreignfiling_text_P24-240-SEC-WO01

[2878] - 208 -

[2879] X21, X22each, independently of one another, denote -O-, -CH2-, -CHR23- or -N-R23-,

[2880] R21and R22each, independently of one another, denote a H atom or an alkyl- or alkoxy group having 1 to 12 C atoms, an alkenyl, alkynyl, alkenyloxy or 5

[2881] alkoxyalkyl group having 2 to 12 C atoms or a cycloalkyl group having 3 to 12 C atoms, in which one or more non-adjacent CH2 groups are

[2882] optionally substituted by -C=C-, -CF2O-, -OCF2-, -CH=CH-,

[2883]

[2884] or -O-CO- in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom or a cycloalkyl or a cycloalkoxy group having 3 to 12 C 15 atoms, in which one or more H atoms may be substituted by a halogen atom,

[2885] R23denotes a H atom, an alkyl or alkoxy group having1 to 10 C atoms, r denotes 0 or 1.

[2886] 20

[2887] LC media comprising compounds of the following sub-formulae ST-1, ST-2 and ST-3 showed a particularly high long-term thermal and UV stability:

[2888] 25

[2889] ST-1

[2890] ST-2

[2891]

[2892] 35 Foreignfiling_text_P24-240-SEC-WO01

[2893] - 209 -

[2894] 5

[2895]

[2896] in which the individual substituents have the following meanings:

[2897] 15

[2898]

[2899] 20 R21and R22each, independently of one another, denote a H atom or an alkyl or alkoxy group having 1 to 7 C atoms, and

[2900] r denotes 0 or 1.

[2901] In particularly preferred embodiments, the compounds of the general Formula ST 25 can be selected from the following specific structures:

[2902] ST-1-1

[2903]

[2904] 35 Foreignfiling_text_P24-240-SEC-WO01

[2905] ST- 1-2 5

[2906] ST- 1-3

[2907]

[2908] 15

[2909] ST- 1-4

[2910]

[2911] 0

[2912] ST- 1-5 5

[2913] ST- 1-6

[2914]

[2915] 5 Foreignfiling_text_P24-240-SEC-WO01

[2916] - 211 - ST- 1-7 ST- 1-8 ST-2-1 ST-2-2 ST-2-3

[2917]

[2918] Foreignfiling_text_P24-240-SEC-WO01

[2919] ST-2-4

[2920] ST-2-5

[2921] 5

[2922] ST-2-6

[2923]

[2924] 0

[2925] ST-2-7 5

[2926]

[2927] ST-2-8

[2928]

[2929] 5 Foreignfiling_text_P24-240-SEC-WO01

[2930] - 213 -

[2931] ST-2-9

[2932] 5

[2933] ST-2-10

[2934] 15

[2935] ST-4-1

[2936]

[2937] 20

[2938] ST-4-2

[2939]

[2940] 25

[2941] Typically, the LC medium of the present invention comprises 10 to 10000 ppm by weight, more preferably 50 to 5000 ppm by weight, even more preferably 100 to 1 000 ppm by weight of one or more compounds of Formula ST.

[2942] In a further preferred embodiment, the LC medium according to the present invention may comprise at least one further sterically hindered phenol, which is mentioned in Table B below.

[2943] 35 Compounds of Formula H

[2944] The LC medium may optionally comprise one or more compounds of the Formula H Foreignfiling_text_P24-240-SEC-WO01

[2945] - 214 -

[2946] 5

[2947]

[2948] in which

[2949] R11 each, independently of one another, denotes a H atom, F, an alkyl group having 1 to 20 C atoms, in which one -CH2- group or, if present, a plurality of -CH2- groups may be substituted by -O- or

[2950] -C(=O)-, but two adjacent -CH2- groups cannot be substituted by -O-, and one or, if present, a plurality of -CH2- groups may be

[2951] 15

[2952] substituted by -CH=CH- or -C=C-, and in which one H atom or a plurality of H atoms may be substituted by F, O

[2953]

[2954] R^, N(R13)(R14)ORR15,

[2955] 20

[2956] R12 each, independently of one another, denotes a H atom, an alkyl group having 1 to 20 C atoms, in which one -CH2- group or a plurality of - CH2- groups may be substituted by -O- or -C(=O)-, but two adjacent - CH2- groups cannot be substituted by -O-, a hydrocarbon group which 25 contains a cycloalkyl or alkylcycloalkyl unit and in which one -CH2- group or a plurality of -CH2- groups may be substituted by -O- or -C(=O)-, but two adjacent -CH2- groups cannot be substituted by -O-, and in which one H atom or a plurality of H atoms may be

[2957]

[2958] substituted by F, OR^, N(R13)(R14) or R^S or an aromatic or heteroaromatic hydrocarbon group, in which one H atom or a plurality of H atoms may be substituted by OR^, N(R13)(R1 )ORR15

[2959] R13 and R^ each, independently of one another, denotes an alkyl or acyl group 35

[2960] having 1 to 10 C atoms or an aromatic hydrocarbon or carboxylic acid group having 6 to 12 C atoms, Foreignfiling_text_P24-240-SEC-WO01

[2961] - 215 -

[2962] R15 each, independently of one another, denotes an alkyl group having 1 to 10 C atoms, in which one -CH2- group or a plurality of -Cogroups may be substituted by -O- or -C(=O)-, but two adjacent -CH2- 5

[2963] groups cannot be substituted by -O-,

[2964] R16 each, independently of one another a H atom, an alkyl group or an alkoxy group having 1 to 10 C atoms, O-cycloalkyl group having 3 to 12 C atoms, O’ or OH,

[2965]

[2966] 1 and each, independently of one another, denote an alkylene group having 1 to 20 C atoms, in which one -CH2- group or, if present, a plurality of -CH2- groups may be substituted by -O- or -C(=O)-, but two adjacent - 15

[2967] CH2- groups cannot be substituted by -O-, and in which one H atom or a plurality of H atoms may be substituted by F, O

[2968]

[2969] R^, N(R13)(R14) or R15 or denote a single bond,

[2970] 20

[2971]

[2972] 1 to each, independently of one another, denote methyl or ethyl,

[2973] X11 denotes C,

[2974] 25 Z^ 1 to each, independently of one another, denote -O-, -(C=O)-, -O-(C=O)-, - (C=O)-O-, -O-(C=O)-O-, -(N-R13)-, -N-R13-(C=O)- or a single bond if is a single bond, both Z11and Z12do not simultaneously denote -O-; if is a single bond, both Z^3and Z^ do not simultaneously

[2975]

[2976] denote -O-; and, if q denotes 0, both Z^2 and Z^3do not simultaneously denote -O-,

[2977] p denotes 1 or 2,

[2978] q denotes 0 or 1,

[2979] 35 o denotes (3-p),

[2980] n denotes an integer from 1 to 10, Foreignfiling_text_P24-240-SEC-WO01

[2981] - 216 -

[2982] denotes an integer from 0 to 8, wherein

[2983] n * p denotes an integer from 1 to 10, preferably from 3 to 8, and

[2984] denotes an organic moiety having (m+n) bonding sites, 5 H

[2985]

[2986] “ ]

[2987] In some preferred embodiments of the present invention, in the compounds of the Formula H,

[2988] 15

[2989] (biphenyl-1, 1 ',3, 3 '-tetrayl) or

[2990] 20

[2991]

[2992] (benzene-1,2,4, 5-tetrayl)

[2993] 25

[2994] (benzene-1,2,4-triyl),

[2995] denotes -(CH2-)2, -(CH2-)3, -(CH2-)4, -(CH2-)5, -(CH2-)6, -(CH2-)7, -(CH2-)8, i.e.

[2996]

[2997] ethane-1,2-diyl, propane-1, 3-diyl, butane-1,4-diyl, pentane- 1,5-diyl, hexane-1,6-diyl, heptane-1,7-diyl, octane-1, 8-diyl, 35

[2998]

[2999] (1,4-phenylene), Foreignfiling_text_P24-240-SEC-WO01

[3000] - 217 -

[3001] (1,3-phenylene),

[3002] 5 (1,2-phenylene) or

[3003]

[3004] (trans- 1,4-cyclohexylene) and / or wherein

[3005] 10

[3006] _Z12_S11_Z11 - on each occurrence, independently of one another, denotes -O-, S11-O-, -O-S11-O-, -(C=O)-O-S11-O-, -O-(C=O)-S11-O-, -O-(C=O)-S11-(C =O)-O-, -O-S11-(C=O)-O-, -(C=O)-O-S11-C, -(C=O)-O-S11-O-(C=O)- or-(N 15 -R13)-S11-O-, -(N-R13-C(=0)-S11-(C=0)-0 or a single bond,

[3007] preferably -O-, -S11-O-, -O-S11-O-, -(C=O)-O-S11-O-, -O-(C=O)-S11-O- o

[3008]

[3009] r -O-S11-(C=O)-O-, and / or

[3010] 1 preferably denotes an alkylene group having 1 to 20 C atoms, and / or 20

[3011] R11 if present, denotes alkyl, alkoxy or H, preferably H or alkyl, and / or R12 denotes H, methyl, ethyl, propyl, isopropyl or3-heptyl, or cyclohexyl.

[3012] In a preferred embodiment of the present application, in the compounds of the 25 Formula H,

[3013]

[3014] denotes a group selected from the group of the formulae:

[3015] 30

[3016]

[3017] 35 Foreignfiling_text_P24-240-SEC-WO01

[3018] - 218 -

[3019] 5

[3020]

[3021] In a further preferred embodiment of the present application, in the compounds of 15 the Formula H,

[3022]

[3023] 20

[3024] denotes a group selected from the group of the formulae

[3025] 25

[3026]

[3027] 35 Foreignfiling_text_P24-240-SEC-WO01

[3028] - 219 -

[3029]

[3030] 5

[3031] In yet a further preferred embodiment of the present invention, in the compounds of the Formula H in which p preferably denotes 1,

[3032] [R11]o

[3033] — Z14-s12-z13^x11}^z12-s11-z11-

[3034]

[3035] 12 11 11

[3036] denotes § Z preferably -O-SH-O-, -SH-O- or -O-SH-, 15

[3037] particularly preferably -O-S11-0- or -S11-0-.

[3038] In a further preferred embodiment of the present invention, in the compounds of the Formula H, the group

[3039] 20

[3040]

[3041] 25 denotes a group selected from the group of the formulae

[3042]

[3043] 35 Foreignfiling_text_P24-240-SEC-WO01

[3044] - 220 -

[3045] 5

[3046]

[3047] 15

[3048] 20

[3049] or

[3050]

[3051] 25

[3052] In a further preferred embodiment of the present invention, in which p is 2, which may be identical to or different from those described above, in the compounds of the Formula H,

[3053]

[3054] 35

[3055] denotes a group selected from the group of the formulae Foreignfiling_text_P24-240-SEC-WO01

[3056] - 221 -

[3057] 5

[3058] 15

[3059]

[3060] and

[3061] 20

[3062] 25

[3063]

[3064] In yet a further preferred embodiment of the present invention, which may be identical to or different from those described above, in the compounds of the Formula H, the group

[3065] Y11

[3066] l / Y12

[3067] -Z12-S11-Z11- / N— R16

[3068] 35

[3069] r" Y13

[3070]

[3071] y14 Foreignfiling_text_P24-240-SEC-WO01

[3072] - 222 -

[3073] on each occurrence, independently of one another, denotes

[3074] 5

[3075] 15

[3076]

[3077] Compounds of the following general Formulae H-1-1, H-1-2 and H-1-3, showed to be 20 particularly efficient UV stabilisers in LC mixtures, in particular, in terms of VHR stability:

[3078] 25

[3079]

[3080] 35 Foreignfiling_text_P24-240-SEC-WO01

[3081] - 223 -

[3082] wherein ZG,

[3083]

[3084] and n are as defined above and n denotes an integer from 1 to 8. These compounds are highly suitable as stabilisers in LC mixtures and stabilise the VHR of the mixtures upon UV exposure.

[3085] 5 In a particularly preferred embodiment, the one or more compounds of the Formula H may be selected from the group consisting of the compounds the following Formulae H-2-1 to H-2-6:

[3086]

[3087] 15

[3088] 20

[3089] 25

[3090]

[3091] 35 Foreignfiling_text_P24-240-SEC-WO01

[3092] 5

[3093]

[3094] 15

[3095] 20

[3096] 25

[3097]

[3098] 35 Foreignfiling_text_P24-240-SEC-WO01

[3099] - 225 -

[3100] 5 H-2-6

[3101]

[3102] in which

[3103] R11 each, independently of one another, denotes an H atom, an alkyl group having 1 to 20 C atoms, in which one -CH2- group or, if present, 15 a plurality of -CH2- groups may be substituted by -O- or

[3104] -C(=O)-, but two adjacent -CH2- groups cannot be substituted by -O-, and one or, if present, a plurality of -CH2- groups may be substituted by -CH=CH- or -C=C-, and in which one H atom or a 20 plurality of H atoms may be substituted by F, O

[3105]

[3106] R^, N(R13)(R14)ORR15,

[3107] R16denotes a H atom or 0‘,

[3108] 25

[3109] n denotes an integer from 0 to 12, and

[3110] 1 and each, independently of one another, denote an alkylene group having 1 to 20 C atoms, in which one -CH2- group or, if present, a plurality of

[3111]

[3112] -CH2- groups may be substituted by -O- or -C(=O)-, but two adjacent - CH2- groups cannot be substituted by -O-, and in which one H atom or a plurality of H atoms may be substituted by F, O

[3113]

[3114] R^, N(R13)(R14) or R15 or denote a single bond.

[3115] 35 Foreignfiling_text_P24-240-SEC-WO01

[3116] - 226 -

[3117] In a preferred embodiment of the present invention, the LC media comprise in each case one or more compounds of the Formula H selected from the following group of the compounds of the formulae:

[3118] 5

[3119] H-3-1

[3120]

[3121] H-3-2

[3122] 15

[3123] H-3-3

[3124] 20

[3125] H-3-4

[3126] 25

[3127]

[3128] H-3-5

[3129]

[3130] 35 Foreignfiling_text_P24-240-SEC-WO01

[3131] - 227 -

[3132] H-3-6

[3133] H-3-7

[3134]

[3135] 25 30 Foreignfiling_text_P24-240-SEC-WO01

[3136] - 228 - H-3-8

[3137] H-3-9

[3138]

[3139] Foreignfiling_text_P24-240-SEC-WO01

[3140] - 229 -

[3141] 5

[3142] H-3-10

[3143] 15

[3144]

[3145] 20

[3146] H-3-11 25

[3147]

[3148] 35 Foreignfiling_text_P24-240-SEC-WO01

[3149] - 230 -

[3150] 5

[3151] 15

[3152]

[3153] 20

[3154] 25

[3155]

[3156] 35 Foreignfiling_text_P24-240-SEC-WO01

[3157] - 231 - H-3-14

[3158]

[3159] Foreignfiling_text_P24-240-SEC-WO01

[3160] - 232 -

[3161] H-3-17

[3162]

[3163] 35 Foreignfiling_text_P24-240-SEC-WO01

[3164] - 233 -

[3165] 5

[3166] H-3-18

[3167] l « o

[3168] 15

[3169] 20 H-3-19

[3170] 25

[3171] 35

[3172]

[3173] and Foreignfiling_text_P24-240-SEC-WO01

[3174] - 234 -

[3175] 5 H-3-21

[3176]

[3177] Preferred content of the one or more compounds of Formula H in the LC medium depends inter alia on the inherent chemical stability of the LC medium as well as on 15

[3178] the nature of the compound of Formula H. Compounds of Formula H in which R16denotes O, which are known as NO radical type HALS are preferably used in proportion ranging from 50 ppm to 1000 ppm, based on the weight of the LC medium. Compounds of Formula H in which R16denotes a H atom, which are 20 known as NH radical type HALS are advantageously used in proportion ranging from 50 ppm to 2000 ppm, based on the weight of the LC medium.

[3179] Further preferred LC media are selected from the following preferred embodiments, including any combination thereof:

[3180] 25

[3181] • a compound of Formula I in combination with a compound of Formula P, Z1, Z3 and III;

[3182] • a compound of Formula I in combination with a compound of Formula II and / or III and a compound of Formula selected from the Formulae YA-9, YA-10, YA- 33, YA-34, YA-35, YA-36, YA-42, YA-43, YB-1, YB-2, YB-3;

[3183] • a compound of Formula I in combination with a compound of the Formula P, Z1, Z4, III and XVII;

[3184] • a compound of Formula I in combination with a compound of the Formula P, 35 Z1, Z4, III and XII;

[3185] • a compound of Formula I in combination with a compound of the Formula P, Z1, Z7, III and XV; Foreignfiling_text_P24-240-SEC-WO01

[3186] - 235 -

[3187] • a compound of Formula I in combination with a compound of the Formula P, Z1, Z7, III and XXIII;

[3188] • a compound of Formula I in combination with a compound of the Formula P, Z1, LP1 and / or LP2;

[3189] 5 • a compound of Formula I in combination with a compound of the Formula P,

[3190] Z1, Z3, Z4 and III;

[3191] • a compound of the Formula I in combination with compounds of the Formula B1 and / or B3, Z1 and III;

[3192] • a compound of the Formula I in combination with compounds of the Formula B1 and / or B3, one or more of YA to YE, and III;

[3193] • a compound of the Formula I in combination with compounds of the Formula B1 and / or B3, Z1, Z3 and III

[3194] • a compound of the Formula I in combination with compounds of the Formula B1-2, B3-2 and / or, Z1, Z4 and III

[3195] 15

[3196] • a compound of the Formula I in combination with compounds of the Formula B1 and / or B3, XVI and III

[3197] • a compound of the Formula I in combination with compounds of the Formula B1 and / or B3, XIV and III

[3198] 20 • a compound of the Formula I in combination with compounds of the Formula B1 and / or B3, XXIIIa and III

[3199] • a compound of the Formula I in combination with compounds of the Formula B1 and / or B3, XVII and III

[3200] • a compound of the Formula I in combination with compounds of the Formula 25

[3201] B1 and / or B3, Z1 and III

[3202] • a compound of the Formula I in combination with compounds of the Formula Z1-1, Z4-2 and / or Z4-3

[3203] • a compound of the Formula I in combination with compounds of the Formula III-16, III-1, III-6 and / or III-20

[3204] • a compound of the Formula I in combination with compounds of the Formula III-20 and XXXa

[3205] • a compound of the Formula I in combination with compounds of the Formula LP1-1 and LP2-2

[3206] 35 • a compound of the Formula I in combination with at least two compounds of the Formula XVI Foreignfiling_text_P24-240-SEC-WO01

[3207] - 236 -

[3208] • a compound of the Formula I in combination with at least two compounds of the Formula XVIIb or at least two compounds of the Formula XVIIe

[3209] • a compound of the Formula I in combination with compounds of the Formula III-16 and II-2

[3210] 5 • a compound of the Formula I in combination with compounds of the Formula XXIIIa and II-2

[3211] • a compound of the Formula I in combination with compounds of the Formula XI Ve, XIVd-1 and Z5

[3212] • a compound of the Formulae S and P in combination with a compound of the Formula LP2, any one of Z1 to Z11 and III

[3213] • a compound of the Formulae S and P in combination with a compound of the Formula LP1, LP2, III and a compound of the Formula Z1 and Z4

[3214] - The LC medium comprises one or more compounds of the Formula I or its 15 subformulae, III and one or more compounds selected from the group consisting of the Formulae Z1, Z2, Z3, Z4, Z5, V, VI, VII, VIII, XIV, XV, XVI, XVIIa, XVIIb, XVIIe, XVIII, XIX, XX, XXI, XXIII, XXIV, XXV, XXVI, XXVII, XXVIII, XXIX, XXX, XXX-1, XXX-2, XXX-3, XXXII, XXXIII and their subformulae.

[3215] - The LC medium comprises one or more compounds of the Formula I or its 20

[3216] subformulae and B1 and / or B3, III and one or more compounds selected from the group consisting of the Formulae Z1, Z2, Z3, Z4, Z5, IV, VI, XII, XIV, XVI, XVIIa, XVIIb, XVIIe, XX, LP1-1, XXIII, XXIX and their subformulae.

[3217] - The LC medium comprises one or more compounds selected from the group 25 consisting of the Formula III-1, III-4, III-6, III-16, III-19 and III-20, very preferably from the group consisting of the Formula III-1, III-6, III-16 and III-20. The individual concentration of each of these compounds is preferably from 2 to 15% by weight. The total concentration of these compounds is preferably from 5 to 30% by weight.

[3218] - The LC medium comprises one or more compounds of the Formula IV, preferably selected from the Formula IVa or IVc, very preferably from the Formula IVa-1 or IVc-1, most preferably of the Formula IVc-1. The individual concentration of each of these compounds is preferably from 2 to 15% by weight. The total 35 concentration of these compounds is preferably from 5 to 20% by weight. Foreignfiling_text_P24-240-SEC-WO01

[3219] - 237 -

[3220] - The LC medium comprises one or more compounds of the Formula VI, preferably selected from the Formula Vlb. The individual concentration of each of these compounds is preferably from 1 to 20% by weight. The total concentration of these compounds is preferably from 5 to 20% by weight.

[3221] 5 - The LC medium comprises one or more compounds of the Formula Z1, preferably selected from the Formula Z1-1. The total concentration of these compounds is preferably from 10 to 70 % by weight, more preferably 20 to 60 % by weight, even more preferably 30 to 50 % by weight.

[3222] - The LC medium comprises one or more compounds of the Formula Z2, preferably selected from the Formulae Z2-1 and Z2-2. The total concentration of these compounds is preferably from 2 to 35%, very preferably from 3 to 25% by weight. - The LC medium comprises from 5 to 20% by weight of compounds of the Formula Z3, preferably of the Formula Z3-1.

[3223] 15

[3224] - The LC medium comprises from 5 to 20% by weight of compounds of the Formula Z4, preferably of the Formula Z4-1.

[3225] - The LC medium comprises from 1 to 30%, very preferably from 2 to 15% by weight of compounds of Formula Z5.

[3226] 20

[3227] - The LC medium comprises one or more compounds of the Formula LP1-1, preferably of the Formula LP1-1a or LP2-1b, very preferably of the Formula LP1- 1a. The concentration of these compounds is preferably from 1 to 15% by weight. - The LC medium comprises from 1 to 15% by weight of compounds of the Formula 25 LP2-1b.

[3228] - The LC medium comprises one or more compounds of the Formula XII, preferably of the Formula XII-1a or XII-1b, very preferably of the Formula XII-1a, most preferably of the Formula XII-1a-1. The concentration of these compounds is preferably from 2 to 15% by weight.

[3229] - The LC medium comprises from 1 to 15% by weight of compounds of the Formula XII-1b.

[3230] - The LC medium comprises one or more compounds of the Formula XIV, preferably of the Formula XlVd, very preferably of the Formula XIVd-1. The 35

[3231] concentration of these compounds is preferably from 2 to 10% by weight. Foreignfiling_text_P24-240-SEC-WO01

[3232] - 238 -

[3233] - The LC medium comprises one or more compounds of the Formula XVIb, preferably of the Formula XVIb-1, XVIb-2 and / or XVIb-3. The concentration of these compounds is preferably from 2 to 15% by weight.

[3234] - The LC medium comprises one or more compounds of the Formula XVIc, 5 preferably of the Formula XVIc-1, XVIc-2 and / or XVIc-3. The concentration of these compounds is preferably from 2 to 20% by weight.

[3235] - The LC medium comprises one or more compounds selected from the group consisting of the Formulae XVIIa, XVIIb and XVIIc, very preferably of the Formula XVIIa wherein L is H and of the Formula XVIIb wherein L is F. The total concentration of these compounds is preferably from 0.5 to 5% by weight.

[3236] - The LC medium comprises one or more compounds of the Formula XX, preferably of the Formula XXa. The concentration of these compounds is preferably from 2 to 10% by weight.

[3237] 15

[3238] - The LC medium comprises one or more compounds of the Formula XXI, preferably of the Formula XXIa. The concentration of these compounds is preferably from 2 to 10% by weight.

[3239] - The LC medium comprises one or more compounds of the Formula XXIII, 20 preferably of the Formula XXIIIa. The concentration of these compounds is preferably from 0.5 to 5% by weight.

[3240] - The LC medium comprises one or more compounds of the Formula XXIX, preferably of the Formula XXIXa. The concentration of these compounds is 25 preferably from 2 to 10% by weight.

[3241] - The LC medium comprises one or more compounds of the Formula XXX. The concentration of these compounds is preferably from 2 to 10% by weight.

[3242] - The LC medium comprises one or more compounds of the Formula XII. The concentration of these compounds is preferably from 2 to 10% by weight.

[3243] - The LC medium comprises one or more compounds of the Formula I, one or more compounds selected from the group consisting of the Formulae Z1, Z2 and Z4 or their subformulae, one or more compounds selected from the group consisting of the Formula XIV, one or more compounds selected from the group consisting of the 35 Formulae IV, VI, XX, XXIII and XXIX or their subformulae, and one or more Foreignfiling_text_P24-240-SEC-WO01

[3244] - 239 -

[3245] compounds selected from the group consisting of the Formulae, XVI, XVIIa, XVIIb, XVI Ic or their subformulae.

[3246] - The LC medium comprises one or more compounds of Formula I, preferably of the Formula I-5, III, one or more compounds selected from the group consisting of the 5 Formulae Z1, Z2, Z3, Z4 and Z5 or their subformulae, one or more compounds selected from the group consisting of the Formula XlVd or their subformulae, one or more compounds selected from the group consisting of the Formulae IVc, Vlb, XXa, XXIIIa andXXIXa or their subformulae, and one or more compounds selected from the group consisting of the Formulae LP1-1b, XVIb, XVIc, XVIIa, XVIIb, XVIIc or their subformulae.

[3247] - The LC medium comprises one or more compounds of the Formula I, preferably of the Formula I-5, III, one or more compounds selected from the group consisting of the Formulae Z1, Z2 and Z3 or their subformulae, one or more compounds of the 15 Formula YA to YE, preferably selected from the group consisting of the Formulae YA and YB, one or more compounds selected from the group consisting of the Formula XIV, one or more compounds selected from the group consisting of the Formulae III, IV, VI, XX, XXIII and XXIX or their subformulae, and one or more compounds selected from the group consisting of the Formulae LP2-1, XVI, XVIIa, 20 XVIIb, XVIIc or their subformulae.

[3248] - The LC medium comprises one or more compounds of the Formula I, preferably of the Formula I-5-3, one or more compounds selected from the group consisting of the Formulae Z1, Z2, Z3, Z4 and Z5 or their subformulae, one or more compounds 25 of Formula B, preferably selected from the group consisting of the Formulae B1, B2 and B3, one or more compounds of the Formula XlVd or their subformulae, one or more compounds selected from the group consisting of the Formulae III, IVc, Vlb, XXa, XXIIIa andXXIXa or their subformulae, and one or more compounds selected from the group consisting of the Formulae LP1-1 b, XVIb, XVIc, XVIIa, XVIIb, XVIIc or their subformulae.

[3249] - Besides the compounds of the Formula I, P Oder B, the LC medium comprises further compounds selected from the group of the compounds of the Formula Z1, Z2, Z3, IV, LP1-1, XIV, XVI, XVIIa, XVIIb, XVIIc, XXI, XXIII, XXIX, XXX and XXIV or their subformulae.

[3250] 35

[3251] - Besides the compounds of the Formulae S, B1 and / or B3, the LC medium comprises further compounds selected from the group of the compounds of the Foreignfiling_text_P24-240-SEC-WO01

[3252] - 240 -

[3253] Formulae Z1, Z2, Z3, IV, LP2-1, XIV, XVI, XVIIa, XVIIb, XVIIc, XXI, XXIII, XXIX, XXX and XXIV or their subformulae.

[3254] - The proportion of compounds of the Formula I or its subformulae in the LC medium is from 1 to 30%, very preferably from 2 to 25%, most preferably from 2 5 to 20% by weight.

[3255] - The proportion of compounds of the Formulae Z1, Z2, Z3, Z4 and Z5 or their subformulae in the LC medium as a whole is from 10 to 65%, very preferably from 20 to 60% by weight.

[3256] - The proportion of compounds of the Formula YA to YF or their subformulae in the LC medium as a whole is from 0 to 15%, very preferably from 2 to 10% by weight. - The proportion of compounds of the Formula B or its subformulae in the LC medium as a whole is from 0 to 15%, very preferably from 2 to 10% by weight. 15 - The proportion of compounds of the Formulae III, IV-VIII, XVIII-XXIII and XXVII- XXX in the LC medium as a whole is 5 to 60% by weight, more preferred is 10 to 30% by weight.

[3257] - The proportion of compounds of the Formulae XIV and XV in the LC medium as a whole is 1 to 20% by weight.

[3258] 20

[3259] - The proportion of compounds of the Formulae XIV, XVIIa-c and XXXII in the LC medium as a whole is 0.5 to 15% by weight.

[3260] The term "alkyl" or "alkyl*" in this application encompasses straight-chain and 25 branched alkyl groups having 1 to 6 carbon atoms, in particular the straight-chain groups methyl, ethyl, propyl, butyl, pentyl and hexyl. Groups having 2 to 5 carbon atoms are generally preferred.

[3261] The term "alkenyl" or “alkenyl*" encompasses straight-chain and branched alkenyl groups having 2 to 6 carbon atoms, in particular the straight-chain groups. Preferred alkenyl groups are C2-C7-1E-alkenyl, C4-C6-3E-alkenyl, in particular C2-C5-1E-alkenyl. Examples of particularly preferred alkenyl groups are vinyl, 1E-propenyl, 1E-butenyl, 1E-pentenyl, 1E-hexenyl, 3-butenyl, 3E-pentenyl, 3E-hexenyl,

[3262] 35 4-pentenyl, 4Z-hexenyl, 4E-hexenyl and 5-hexenyl. Groups having up to 5 carbon atoms are generally preferred, in particular CH2=CH, CH3CH=CH. Foreignfiling_text_P24-240-SEC-WO01

[3263] - 241 -

[3264] The term "fluoroalkyl" preferably encompasses straight-chain groups having a terminal fluorine, i.e. fluoromethyl, 2-fluoroethyl, 3-fluoropropyl, 4-fluorobutyl, 5-fluoropentyl, 6-fluorohexyl and 7-fluoroheptyl. However, other positions of the fluorine are not excluded.

[3265] 5

[3266] The term "oxaalkyl" or "alkoxy" preferably encompasses straight-chain groups of the Formula CnH2n+1-O-(CH2)m, in which n and m each, independently of one another, denote 1 to 6. m may also denote 0. Preferably, n = 1 and m = 1 to 6 or m = 0 and n = 1 to 3. Further preferably the alkoxy or oxaalkyl group can also contain one or more further O atoms such that oxygen atoms are not directly linked to one another.

[3267] Through a suitable choice of the meanings

[3268]

[3269] of RO and in Formulae II and III, the addressing times, the threshold voltage, the steepness of the transmission characteristic lines, etc., can be modified in the desired manner. For example, 1E- 15

[3270] alkenyl groups, 3E-alkenyl groups, 2E-alkenyloxy groups and the like generally result in shorter addressing times, improved nematic tendencies and a higher ratio between the elastic constants K3 (bend) and

[3271]

[3272] (splay) compared with alkyl and alkoxy groups. 4-Alkenyl groups, 3-alkenyl groups and the like generally give lower 20 threshold voltages and lower values of K3 /

[3273]

[3274] compared with alkyl and alkoxy groups. The LC media according to the invention are distinguished, in particular, by high As values and thus have significantly faster response times than the LC media from the prior art.

[3275] 25

[3276] The optimum mixing ratio of the compounds of the above-mentioned formulae depends substantially on the desired properties, on the choice of the components of the above-mentioned formulae and on the choice of any further components that may be present.

[3277] Suitable mixing ratios within the range indicated above can easily be determined from case to case.

[3278] The total amount of compounds of the above-mentioned formulae in the LC media 35 according to the invention is not crucial. The LC media can therefore comprise one or more further components for the purposes of optimisation of various properties. Foreignfiling_text_P24-240-SEC-WO01

[3279] - 242 -

[3280] However, the observed effect on the desired improvement in the properties of the medium is generally greater, the higher the total concentration of compounds of the above-mentioned formulae.

[3281] 5 The individual compounds of the above-mentioned formulae and the subformulae thereof which can be used in the LC media according to the invention are either known or can be prepared analogously to the known compounds.

[3282] The invention also relates to a process for the preparation of a LC medium as described above and below, by mixing one or more compounds of Formula I and one or more compounds selected from the group consisting of the Formulae II, III, Z1, Z2, Z3, Z4, IV, VI, XIV, XVI, XVIIa, XVIIb, XVIIc, XX, XXIII, XXIX.

[3283] The LC medium of the present invention may optionally comprise one or more 15

[3284] polymerisable compounds. The polymerisable compounds are preferably selected from the Formula M

[3285] Ra-B1-(Zb-B2)m-RbM

[3286] 20

[3287] in which the individual substituents, on each occurrence identically or differently, and each, independently of one another, have the following meaning:

[3288] Raand RbP, P-Sp-, H, F, Cl, Br, I, -CN, -NO2, -NCO, -NCS, -OCN, -SCN, SF5or 25

[3289] straight-chain or branched alkyl having 1 to 25 C atoms, in which, in addition, one or more non-adjacent CH2groups may each be replaced, independently of one another, by -C(R0)=C(R00)-, -C=C-, -N(R00)-, -O-, -S-, -CO-, -CO-O-, -O-CO-, -O-CO-O- in such a way that O and / or S atoms are not linked directly to one another, and in which, in addition, one or more H atoms may be replaced by F, Cl, Br, I, CN, P or P-Sp-, where, if B^ and / or B^ contain a saturated C atom, Raand / or Rbmay also denote a group which is spiro-linked to this 35 saturated C atom, Foreignfiling_text_P24-240-SEC-WO01

[3290] - 243 -

[3291] wherein at least one of the substituents Raand Rbdenotes or contains a group P or P-Sp-,

[3292] P a polymerisable group,

[3293] 5 Sp a spacer group or a single bond,

[3294] B1and B2an aromatic, heteroaromatic, alicyclic or heterocyclic group, preferably having 4 to 25 ring atoms, which may also contain fused rings, and which is unsubstituted, or mono- or polysubstituted by L,

[3295] Zb-O-, -S-, -CO-, -CO-O-, -OCO-, -O-CO-O-, -OCH2-, -CH2O-, -SCH2-,

[3296] -CH2S-, -CF2O-, -OCF2-, -CF2S-, -SCF2-, -(CH2)n1-, -CF2CH2-, -CH2CF2-, -(CF2)n1-, -CH=CH-, -CF=CF-, -C=C-, -CH=CH-COO-,

[3297]

[3298] -OCO-CH=CH-, CROROO or a single bond, 15

[3299] RO and R^O each, independently of one another, denote H or alkyl having 1 to 12 C atoms,

[3300] 20 m denotes 0, 1, 2, 3 or 4,

[3301] n1 denotes 1, 2, 3 or 4,

[3302] L P, P-Sp-, OH, CH2OH, F, Cl, Br, I, -CN, -NO2, -NCO, -NCS,

[3303] -OCN, -SCN, -C(=O)N(RX)2, -C(=O)Y1, -C(=O)RX, -N(RX)2, optionally 25

[3304] substituted silyl, optionally substituted aryl having 6 to 20 C atoms, or straight-chain or branched alkyl, alkoxy, alkylcarbonyl, alkoxycarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy having 1 to 25 C atoms, in which, in addition, one or more H atoms may be replaced by F, Cl, P or P-Sp-,

[3305] P and Sp have the meanings indicated in the Formula M above,

[3306] denotes halogen,

[3307] Rxdenotes P, P-Sp-, H, halogen, straight-chain, branched or cyclic alkyl 35

[3308] having 1 to 25 C atoms, in which, in addition, one or more non- adjacent CH2groups may be replaced by -O-, -S-, -CO-, -CO-O-, Foreignfiling_text_P24-240-SEC-WO01

[3309] - 244 -

[3310] -O-CO-, -O-CO-O- in such a way that O and / or S atoms are not linked directly to one another, and in which, in addition, one or more H atoms may be replaced by F, Cl, P or P-Sp-, an optionally substituted aryl or aryloxy group having 6 to 40 C atoms, or an optionally substituted 5 heteroaryl or heteroaryloxy group having 2 to 40 C atoms.

[3311] Further preferably, the LC media according to the present invention comprise one or more polymerisable compounds selected from Table H below.

[3312] Preferably, the proportion of polymerisable compounds in the LC medium, preferably selected from the Formula M and Table H, is from 0.01 to 5%, very preferably from 0.05 to 1%, most preferably from 0.1 to 0.5%.

[3313] It was observed that the addition of one or more polymerisable compounds to the LC 15

[3314] medium, like those selected from the Formula M and Table H, leads to advantageous properties like fast response times. Such a LC medium is especially suitable for use in PSA displays where it shows low image sticking, a quick and complete polymerisation, the quick generation of a low pretilt angle which is stable after UV exposure, a high reliability, high VHR value after UV exposure, and a high 20

[3315] birefringence. By appropriate selection of the polymerisable compounds it is possible to increase the absorption of the LC medium at longer UV wavelengths, so that it is possible to use such longer UV wavelengths for polymerisation, which is advantageous for the display manufacturing process.

[3316] 25

[3317] Preference is generally given to LC media which have a nematic LC phase, and preferably have no chiral liquid crystal phase.

[3318] The invention also relates to the use of a LC medium according to the present invention as described above and below for electro-optical purposes, in particular for the use is in shutter glasses, for 3D applications, in TN, PS-TN, STN, TN-TFT, OCB, IPS, PS-IPS, FFS, HB-FFS, XB-FFS, PS-FFS, positive VA and positive PS-VA displays, and to electro-optical displays, in particular of the aforementioned types, containing a LC medium according to the present invention as described above and 35

[3319] below, in particular a TN, PS-TN, STN, TN-TFT, OCB, IPS, PS-IPS, FFS, HB-FFS, XB-FFS, PS-FFS, positive VA (vertically aligned) or positive PS-VA display. Foreignfiling_text_P24-240-SEC-WO01

[3320] - 245 -

[3321] The invention also relates to electro-optical displays, such as, for example, STN or matrix LC (MLC) displays, having two plane-parallel outer plates, which, together with a frame, form a cell, integrated non-linear elements for switching individual 5 pixels on the outer plates, and a nematic LC medium having positive dielectric anisotropy and high specific resistance located in the cell, wherein the nematic LC medium is a LC medium according to the present invention as described above and below.

[3322] The LC media according to the invention enable a significant broadening of the available parameter latitude. The achievable combinations of clearing point, viscosity at low temperature, thermal and UV stability and high optical anisotropy are far superior to previous materials from the prior art.

[3323] 15

[3324] In particular, the combination of compounds of the Formula I with compounds selected from the Formulae I l-XXXI I or their subformulae, leads to LC media which show a high average elastic constant Kavin combination with a low response time parameter y-| /

[3325]

[3326] and a low rotational viscosity. This enables fast energy saving LC 20 displays, especially of the FFS, HB-FFS, XB-FFS and IPS mode.

[3327] The LC media according to the invention are suitable for mobile applications and TFT applications, such as, for example, mobile telephones and PDAs. Furthermore, the LC media according to the invention are particularly suitably for use in FFS, HB- 25 FFS, XB-FFS and IPS displays based on dielectrically positive liquid crystals.

[3328] The LC media according to the present invention, while retaining the nematic phase down to -20 °C and preferably down to -30 °C, particularly preferably down to -40 °C, and the clearing point > 80 °C, preferably > 90 °C, more preferably > 100 °C. They preferably allow rotational viscosities yj of < 120 mPa • s, particularly preferably < 100 mPa • s, to be achieved, enabling excellent MLC displays having fast response times to be achieved. The rotational viscosities are determined at 20 °C.

[3329] 35 Foreignfiling_text_P24-240-SEC-WO01

[3330] - 246 -

[3331] The dielectric anisotropy As of the LC media according to the invention at 20 °C and 1 kHz is preferably > +1.5, very preferably from +3 to +18, most preferred from +5 to +15.

[3332] 5 The birefringence An of the LC media according to the invention at 20 °C is preferably from 0.08 to 0.2, very preferably from 0.09 to 0.15.

[3333] The rotational viscosity yj of the LC media according to the invention is preferably < 120 mPa ■ s, more preferably < 110 mPa ■ s, very preferably < 90 mPa ■ s.

[3334] The ratio yj / Kj (wherein yj is the rotational viscosity and Kj is the elastic constant for splay deformation) of the LC media according to the invention is preferably < 7.0 mPa ■ s / pN, very preferably < 5.0 mPa s / pN, most preferably < 4.0 mPa s / pN.

[3335] 15

[3336] The average elasticity constant ratio Kavof the LC media according to the invention is preferably at least 14.0 pN, very preferably at least 14.0 pN, most preferably at least 15.0 pN. Kavcan be calculated according to the following formula: Kav= (K1+ K2+ K3) / 3 ≈ (K1+ ½ * K1+ K3) / 3.

[3337] 20

[3338] The nematic phase range of the LC media according to the invention preferably has a width of at least 70 °C, more preferably of at least 80 °C, in particular at least 90 °C. This range preferably extends at least from -25 °C to +90 °C.

[3339] 25

[3340] It goes without saying that, through a suitable choice of the components of the LC media according to the invention, it is also possible for higher clearing points (for example above 100 °C) to be achieved at higher threshold voltages or lower clearing points to be achieved at lower threshold voltages with retention of the other advantageous properties. At viscosities correspondingly increased only slightly, it is likewise possible to obtain LC media having a higher As and thus low thresholds. The MLC displays according to the invention preferably operate at the first Gooch and Tarry transmission minimum [C. H. Gooch and H. A. Tarry, Electron. Lett. 10, 2-4, 1974; C. H. Gooch and H. A. Tarry, Appl. Phys., Vol. 8, 1575-1584, 1975], 35

[3341] where, besides particularly favourable electro-optical properties, such as, for example, high steepness of the characteristic line and low angle dependence of the Foreignfiling_text_P24-240-SEC-WO01

[3342] - 247 -

[3343] contrast (German patent 3022818), lower dielectric anisotropy is sufficient at the same threshold voltage as in an analogous display at the second minimum. This enables significantly higher specific resistance values to be achieved using the LC media according to the invention at the first minimum than in the case of LC media 5 comprising cyano compounds. Through a suitable choice of the individual components and their proportions by weight, the person skilled in the art is able to set the birefringence necessary for a pre-specified layer thickness of the MLC display using simple routine methods.

[3344] Measurements of the voltage holding ratio (VHR) [S. Matsumoto et al., Liquid Crystals 5, 1320 (1989); K. Niwa et al., Proc. SID Conference, San Francisco, June 1984, p. 304 (1984); G. Weber et al., Liquid Crystals 5, 1381 (1989)] have shown that LC media according to the invention exhibit a significantly smaller decrease in the VHR on UV exposure than analogous LC media comprising cyano- 15

[3345]

[3346] phenylcyclohexanes of the Formula or esters of the 0F

[3347] R - / o\- S-O— < O)- CN

[3348]

[3349] 20 Formula

[3350] The light stability and UV stability of the LC media according to the invention are considerably better, i.e. they exhibit a significantly smaller decrease in the HR on exposure to light, heat or UV.

[3351] 25

[3352] The construction of the MLC display according to the invention from polarisers, electrode base plates and surface-treated electrodes corresponds to the usual design for displays of this type. The term usual design is broadly drawn here and also encompasses all derivatives and modifications of the MLC display, in particular including matrix display elements based on poly-Si TFTs or MIM.

[3353] A significant difference between the displays according to the invention and the hitherto conventional displays based on the twisted nematic cell consists, however, 35 in the choice of the LC parameters of the LC layer. Foreignfiling_text_P24-240-SEC-WO01

[3354] - 248 -

[3355] The LC media which can be used in accordance with the invention are prepared in a manner conventional perse, for example by mixing compounds of Claim 1 with one or more compounds of the Formulae I l-XXXI I or with further LC compounds and / or additives. In general, the desired amount of the components used in lesser amount 5 is dissolved in the components making up the principal constituent, advantageously at elevated temperature. It is also possible to mix solutions of the components in an organic solvent, for example in acetone, chloroform or methanol, and to remove the solvent again, for example by distillation, after thorough mixing.

[3356] The LC media may also comprise further additives known to the person skilled in the art and described in the literature, such as, for example, polymerisation initiators, inhibitors, surface-active substances, microparticles, free-radical scavengers, nanoparticles, etc. For example, 0 to 15% of pleochroic dyes or chiral dopants or initiators like Irgacure® 651 or Irgacure® 907 can be added. Suitable stabilisers and 15

[3357] dopants are mentioned below in Tables F and G. In a preferred embodiment, the LC medium comprises one or more stabilisers selected from Table G. Preferably, the proportion of antioxidants and light stabilisers, like those of the Formula ST and H, as described above or listed in Table G, in the LC medium is from 10 to 2000 ppm, very preferably from 30 to 1000 ppm.

[3358] 20

[3359] Furthermore, it is possible to add to the LC media, for example, 0 to 15% by weight of pleochroic dyes, furthermore nanoparticles, conductive salts, preferably ethyldimethyldodecylammonium 4-hexoxybenzoate, tetrabutylammonium

[3360] 25 tetraphenylborate or complex salts of crown ethers of., for example, Haller et al., Mol. Cryst. Liq. Cryst. 24, 249-258 (1973)), for improving the conductivity, or substances for modifying the dielectric anisotropy, the viscosity and / or the alignment of the nematic phases. Substances of this type are described, for example, in DE-A 22 09 127, 2240864, 2321 632, 2338281, 2450088, 2637430 and 2853728.

[3361] For the present invention and in the following examples, the structures of the LC compounds are indicated by means of acronyms, with the transformation into chemical formulae taking place in accordance with Tables A to C below. All substituents CmH2m+1, CnH2n+1and C1H21+1 or CmH2m-1, CnH2n-1 and 35

[3362] C|H2|-1 are straight-chain alkyl groups or alkylene groups, in each case having n, m and I C atoms respectively. Preferably, n, m and I are independently of each other 1, Foreignfiling_text_P24-240-SEC-WO01

[3363] - 249 -

[3364] 2, 3, 4, 5, 6, or 7. Table A shows the codes for the ring elements of the nuclei of the compound, Table B lists the bridging units, and Table C lists the meanings of the symbols for the left- and right-hand end groups of the molecules. The acronyms are composed of the codes for the ring elements with optional linking groups, followed by 5 a first hyphen and the codes for the left-hand end group, and a second hyphen and the codes for the right-hand end group. Table D shows illustrative structures of compounds together with their respective abbreviations.

[3365] Table A: Ring elements

[3366] 15

[3367] 20

[3368] 25

[3369] 35

[3370]

[3371] Foreignfiling_text_P24-240-SEC-WO01

[3372] - 250 -

[3373] 5

[3374] 15

[3375] 20

[3376] 25

[3377] 35

[3378]

[3379] Foreignfiling_text_P24-240-SEC-WO01

[3380] 5

[3381] 15

[3382] 20

[3383] 25

[3384] 35

[3385]

[3386] Foreignfiling_text_P24-240-SEC-WO01

[3387] - 252 -

[3388] Table B: Bridging units

[3389] E -CH2-CH2- V -CH=CH- 5 T -CEC- W -CF2-CF2- B -CF=CF- Z -CO-O- Zl -O-CO- X -CF=CH- XI -CH=CF- 10

[3390] 0 -CH2-O- Ol -O-CH2- Q -CF2-O- Ql -O-CF2-

[3391]

[3392] Table C: End groups

[3393] 15

[3394] On the left individually or in combiOn the right individually or in comnation bination

[3395] n- CnH2n+1- -n -CnH2n+1

[3396] nO- CnH2n+1-O- -On -O-CnH2n+1

[3397] 20

[3398] V- CH2=CH- -V -CH=CH2

[3399] nV- CnH2n+1-CH=CH- -nV -CnH2n-CH=CH2Vn- CH2=CH-CnH2n- -Vn -CH=CH-CnH2n+1nVm- CnH2n+1-CH=CH- -nVm -CnH2n-CH=CH- 25

[3400] CmH2m- CmH2m+1

[3401] N- N≡C- -N -C≡N

[3402] S' S=C=N- -S -N=C=S

[3403] F- F- -F -F

[3404] 30 CL- Cl- -CL -Cl

[3405] M- CFH2- -M -CFH2

[3406] D- CF2H- -D -CF2H

[3407] T- CF3- -T -CF3

[3408] MO- CFH2O - -OM -OCFH2

[3409] o

[3410] DO- CF2HO - -OD -OCF2H Foreignfiling_text_P24-240-SEC-WO01

[3411] - 253 -

[3412] TO- CF3O- -OT -OCF3A- H-C=C- -A -CEC-H nA-cnH2n+1'CEC- -An -C=C-C C, Ll inH2n+1 £ 7 _ 0. O. OJ O

[3413] NA- NEC-CEC- -AN -C=UAOA-- ZE^11C ZE

[3414] O O C 1 U_LLLL ZEC-C=N O OO OOOOO

[3415] 5 (cn)- -(cn) (CH2)n.2

[3416] (cn)m- (CH2)n.2-m(cn)

[3417] (CH2)m- Q > N N § c S

[3418] 1 II 11111

[3419]

[3420] On the left only in combination On the right only in combination

[3421] C, LL i

[3422] 15 O O. O O

[3423] 0l I C11\ ZE H 1

[3424] OO CLLLL ZEILL

[3425] 00000000

[3426] 20 > N N § cO S

[3427] 1 II 11111

[3428] in which n and m are each integers, and the three dots are placeholders for other abbreviations from this table.

[3429] 25 The following abbreviations are used:

[3430] (n, m, k and I are, independently of one another, each an integer, preferably 1 to 12 preferably 1 to 6, k and I possibly may be also 0 and preferably are 0 to 4, more preferably 0 or 2 and most preferably 2, n preferably is 1, 2, 3, 4 or 5, in the combination “-nO-” it preferably is 1, 2, 3 or 4, preferably 2 or 4, m preferably is 1, 2, 3, 4 or 5, in the combination “-Om” it preferably is 1, 2, 3 or 4, more preferably 2 or 4. The combination “-IVm” preferably is “2V1”.)

[3431] Preferred components of the LC medium are shown in Tables D and E.

[3432] 35 Foreignfiling_text_P24-240-SEC-WO01

[3433] - 254 - Table D

[3434] 5

[3435] C

[3436]

[3437] MEnF. F MEnm

[3438] 15

[3439] 0

[3440] MEnO.m MEn. Om CnH2n+-|O co— o CnH2n+1 MEnON. F MEnOOm Cr> H2n+1 0

[3441] MEnOOm. F MEnS

[3442]

[3443] HP-nN. F Foreignfiling_text_P24-240-SEC-WO01

[3444] - 255 -

[3445] 5

[3446] 15

[3447]

[3448] 20

[3449]

[3450] 25

[3451]

[3452] CPTP CEPTP

[3453] 35 Foreignfiling_text_P24-240-SEC-WO01

[3454] - 256 - 5

[3455]

[3456] 15 20

[3457]

[3458] 25

[3459]

[3460] EBCH CPC

[3461] 35 Foreignfiling_text_P24-240-SEC-WO01

[3462] - 257 -

[3463] 5

[3464] CGG

[3465] F

[3466]

[3467] 15

[3468] CFU

[3469] Table E

[3470] 20 In the following formulae, n and m each, independently of one another, denote 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 or 12, in particular 2, 3, 5, furthermore 0, 4, 6.

[3471] 25

[3472]

[3473] ACQU-n-F

[3474] 35 Foreignfiling_text_P24-240-SEC-WO01

[3475] - 258 -

[3476] F F

[3477]

[3478] APUQU-n-F

[3479] 5

[3480] F F

[3481] F F APUQU-(c5)-F

[3482] 15

[3483] 20

[3484]

[3485] 25

[3486] 35

[3487]

[3488] Foreignfiling_text_P24-240-SEC-WO01

[3489] - 259 - CCD-n-m CCA-n-m

[3490] 5

[3491] 15

[3492]

[3493] 20

[3494]

[3495] CDUQU-n-F

[3496] 25

[3497] CLGP-n-m

[3498]

[3499] CLGIP-n-m

[3500] 35 Foreignfiling_text_P24-240-SEC-WO01

[3501] - 260 -

[3502]

[3503] CLUQU-n-F

[3504] 5

[3505] 15 20 25

[3506] CGG-n-F CPZG-n-OT

[3507] CC-nV-Vm

[3508]

[3509] 35

[3510] CCP-Vn-m CCG-V-F Foreignfiling_text_P24-240-SEC-WO01

[3511] - 261 -

[3512] CnH2n+1CCP-nV-m CC-n-V 5

[3513] CnH2n+1CmH2m+1CCC-n-m

[3514] CnH2n+1

[3515] CCC-n-V

[3516] 15

[3517] CnH2n+1CnH2n+1CF2CmH2m+1

[3518]

[3519] CCQU-n-F CC-n-Vm

[3520] 20

[3521] CnH2n+1

[3522] 25 CLUQU-n-F

[3523] CPPC-nV-Vm

[3524]

[3525] 35

[3526] CCQG-n-F CQU-n-F Foreignfiling_text_P24-240-SEC-WO01

[3527] - 262 -

[3528] CnH2n+1CF3CmH2m+1

[3529] CP-1V-m CLP-n-T 5 CnH2n+1OCF3

[3530] CLP-n-OT

[3531] CmH 2m + 1 CmH 2m + 1

[3532] CP-2V-m CP-V2-m

[3533] 15 CnH2n+1

[3534] CnH2n+1C2F

[3535]

[3536] Dec-U-n-F CWCU-n-F

[3537] 20

[3538] F

[3539] CmH2m+1CPGP-n-m 25

[3540] F F

[3541] CnH2n+1F

[3542] F CWCG-n-F CLU-n-F

[3543] H3C F CCnH2n+1F

[3544]

[3545] F 35 CLU(1)-n-F Foreignfiling_text_P24-240-SEC-WO01

[3546] - 263 -

[3547] CnH2n+1CH2

[3548] CCOC-n-m

[3549] 5 CnH2n+1CnH2n+1

[3550] CPTU-n-F GPTU-n-F

[3551] 15 PQU-n-F

[3552] 20 CGZP-n-OT

[3553] 25

[3554] CCGU-n-F

[3555]

[3556] F DPGU-n-F DPGU-n-OT

[3557] 35 Foreignfiling_text_P24-240-SEC-WO01

[3558] - 264 -

[3559] 5

[3560] F

[3561] F CCCQU-n-F

[3562] 15

[3563]

[3564] CGUQU-n-F

[3565] 20

[3566]

[3567] CPGU-n-OT

[3568] 25

[3569] PYP-nF

[3570] F F

[3571]

[3572] F CPGU-n-F

[3573] 35 Foreignfiling_text_P24-240-SEC-WO01

[3574] - 265 -

[3575]

[3576] 35 PP-nV-Vm PP-1-nVm Foreignfiling_text_P24-240-SEC-WO01

[3577] - 266 -

[3578] F

[3579]

[3580] F 5 CWCQU-n-F

[3581] CnH2n+110

[3582]

[3583] PPGU-n-F

[3584] 20

[3585] 30

[3586]

[3587] 35 Foreignfiling_text_P24-240-SEC-WO01

[3588] - 267 -

[3589] MPP-n-F 5

[3590]

[3591] F F F F MUQU-n-F NUQU-n-F

[3592] 15

[3593] CCEY-n-Om

[3594] F

[3595] 20 PGP-n-kVm

[3596] CnH2n+1-O-(CH2)k

[3597]

[3598] 25 PP-n-kVm

[3599]

[3600] GGP-n-F PGIGI-n-F

[3601] 35 Foreignfiling_text_P24-240-SEC-WO01

[3602] - 268 -

[3603] 5

[3604] 10

[3605] 15

[3606] 20

[3607] PUS(1)-n-m PUS(1)-n-Om 25

[3608] 30

[3609] 35

[3610]

[3611] PGS-(c5)-m Foreignfiling_text_P24-240-SEC-WO01

[3612] - 269 -

[3613] 5

[3614] PGS(1)-(c5)-m

[3615] CCQU(1)-n-F

[3616] 15

[3617]

[3618] F F DUQU(1)-n-F

[3619] 20

[3620] F F PUQU(1)-n-F

[3621] 25

[3622] APUQU(1)-n-F

[3623] 35

[3624]

[3625] F F Foreignfiling_text_P24-240-SEC-WO01

[3626] - 270 -

[3627] CDUQU(1)-n-F

[3628] 5

[3629] F CPPQU(1)-n-F

[3630] F F DGUQU(1)-n-F

[3631] 15

[3632]

[3633] F F

[3634] DPUQU(1)-n-F

[3635] 20

[3636] F F

[3637] 25 PGUQU(1)-n-F

[3638] F F

[3639]

[3640] PYP-n-m

[3641] Particular preference is given to LC media which, besides the compounds of the Formula I, comprise at least one, two, three, four or more compounds from Table E.

[3642] 35

[3643] Table F Foreignfiling_text_P24-240-SEC-WO01

[3644] - 271 -

[3645] Table F indicates possible dopants which are generally added to the LC media according to the invention. The LC media preferably comprise 0-10% by weight, in particular 0.01-5% by weight and particularly preferably 0.01-3% by weight of dopants.

[3646] 5

[3647] CB 15

[3648] 15

[3649] 20

[3650]

[3651] 25

[3652]

[3653] 35

[3654] R / S-2011 R / S-3011 Foreignfiling_text_P24-240-SEC-WO01

[3655] - 272 -

[3656] 5

[3657]

[3658] R / S-1011

[3659] 15 Table G

[3660] Antioxidants and light stabilizers, which can additionally be added, for example, to the LC media according to the invention in amounts of 0 to 10% by weight, are mentioned below.

[3661] 20

[3662] 25

[3663]

[3664] n = 1, 2, 3, 4, 5, 6 or 7

[3665] 35 Foreignfiling_text_P24-240-SEC-WO01

[3666] - 273 -

[3667] 5 n = 1, 2, 3, 4, 5, 6 or 7

[3668] n = 1, 2, 3, 4, 5, 6 or 7 q = 1, 2, 3, 4, 5, 6 or 7 15

[3669] 20

[3670] 30

[3671]

[3672] 35 Foreignfiling_text_P24-240-SEC-WO01

[3673] - 274 -

[3674] 5

[3675]

[3676] 15

[3677] 0

[3678]

[3679] 5

[3680]

[3681] 5 Foreignfiling_text_P24-240-SEC-WO01

[3682] - 275 -

[3683] 5

[3684]

[3685] 15

[3686] 20

[3687]

[3688] 25

[3689]

[3690] 35

[3691]

[3692] OS

[3693]

[3694] Foreignfiling_text_P24-240-SEC-W001 - 276 - Foreignfiling_text_P24-240-SEC-WO01

[3695] - 277 -

[3696] 5

[3697]

[3698] 15

[3699] 20

[3700] 25

[3701]

[3702] 35

[3703]

[3704] Foreignfiling_text_P24-240-SEC-WO01

[3705] - 278 -

[3706] 5

[3707] q = 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10

[3708] Table H

[3709]

[3710] Table H shows illustrative reactive mesogenic compounds (RMs) which can be used in the LC media in accordance with the present invention.

[3711] 15

[3712]

[3713] RM-1 RM-2

[3714] 20

[3715]

[3716] RM-4 25

[3717] RM-6

[3718] 35

[3719]

[3720] Foreignfiling_text_P24-240-SEC-WO01

[3721] - 279 - RM-7 RM-8

[3722] 5

[3723] RM-9 RM-10

[3724] V

[3725] RM-12 15

[3726]

[3727] RM-14 20

[3728] 25 RM-15 RM-16

[3729] RM-17 RM-18

[3730]

[3731] 35 Foreignfiling_text_P24-240-SEC-WO01

[3732] - 280 -

[3733] RM-19 RM-20

[3734] 5

[3735] RM-21 RM-22

[3736] RM-23 RM-24

[3737] 15

[3738]

[3739] RM-25 RM-26

[3740] 20

[3741] RM-27 RM-28 25

[3742] RM-29 RM-30

[3743]

[3744] 35

[3745] RM-31 RM-32 Foreignfiling_text_P24-240-SEC-WO01

[3746] - 281 -

[3747] 5

[3748] RM-33 RM-34

[3749] RM-35 RM-36

[3750] 15

[3751]

[3752] RM-37 RM-38

[3753] 20

[3754] \

[3755] 25 RM-39 RM-40

[3756]

[3757] RM-41 RM-42

[3758] 35 Foreignfiling_text_P24-240-SEC-WO01

[3759] - 282 -

[3760] 5 RM-43 RM-44

[3761] RM-45 RM-46 15

[3762] RM-47 20 RM-48 RM-49 25

[3763] RM-50

[3764]

[3765] 35

[3766] RM-51 Foreignfiling_text_P24-240-SEC-WO01

[3767] - 283 -

[3768] 5

[3769] RM-53

[3770]

[3771] 15

[3772]

[3773] RM-57 0

[3774] 5

[3775] RM-58 RM-59

[3776]

[3777] RM-60

[3778] 5

[3779]

[3780] o Foreignfiling_text_P24-240-SEC-WO01

[3781] - 284 -

[3782] RM-62 RM-63

[3783] 5

[3784] 15

[3785] 20

[3786] 30

[3787]

[3788] 35

[3789] RM-74 RM-75 Foreignfiling_text_P24-240-SEC-WO01

[3790] - 285 -

[3791] RM-76 RM-77 5

[3792] RM-78

[3793] 15

[3794]

[3795] RM-80

[3796] 20

[3797]

[3798] RM-83

[3799] 25

[3800] RM-84 RM-85

[3801] o

[3802] 35

[3803]

[3804] RM-86 RM-87 Foreignfiling_text_P24-240-SEC-WO01

[3805] - 286 -

[3806] 5

[3807] 15

[3808]

[3809] 20

[3810]

[3811] RM-93

[3812] 25 RM-94 RM-95

[3813] 35

[3814]

[3815] RM-97 Foreignfiling_text_P24-240-SEC-WO01

[3816]

[3817] Foreignfiling_text_P24-240-SEC-WO01

[3818] - 288 - RM-103

[3819] 5

[3820] RM-104

[3821] 15

[3822]

[3823] 20

[3824] RM-105

[3825] 25

[3826]

[3827] 35 Foreignfiling_text_P24-240-SEC-WO01

[3828] 5

[3829]

[3830] 15

[3831] 20

[3832]

[3833] 25

[3834]

[3835] 35 Foreignfiling_text_P24-240-SEC-WO01

[3836] 5

[3837] 15

[3838]

[3839] 20

[3840]

[3841] 25

[3842]

[3843] 35 Foreignfiling_text_P24-240-SEC-WO01

[3844] - 291 -

[3845] 5

[3846] RM-125 RM-126

[3847] 15

[3848]

[3849] RM-128 20

[3850] 25

[3851] RM-129

[3852]

[3853] 35 Foreignfiling_text_P24-240-SEC-WO01

[3854]

[3855] Foreignfiling_text_P24-240-SEC-WO01

[3856] - 293 -

[3857] 5

[3858] RM-139 RM-140

[3859] RM-141 15 20

[3860] 30

[3861]

[3862] RM-147 RM-148 Foreignfiling_text_P24-240-SEC-WO01

[3863] - 294 -

[3864] 5 RM-149 RM-150

[3865] RM-151 15

[3866]

[3867] 20 RM-153

[3868]

[3869] 25

[3870] RM-155 RM-156

[3871]

[3872] 35 RM-157 RM-158 Foreignfiling_text_P24-240-SEC-WO01

[3873] 5

[3874]

[3875] 15

[3876] 20

[3877]

[3878] 25

[3879] 35

[3880]

[3881] Foreignfiling_text_P24-240-SEC-WO01

[3882] - 296 - RM-167 RM-168

[3883] 5

[3884] RM-169 RM-170

[3885] RM-171 RM-172 15

[3886]

[3887] RM-173 RM-174

[3888] 20

[3889] 25

[3890] RM-175 RM-176

[3891]

[3892] 35 RM-177 RM-178 Foreignfiling_text_P24-240-SEC-WO01

[3893] 5

[3894] 15

[3895]

[3896] 20

[3897]

[3898] 25 The LC media according to the invention may optionally comprise one or more polymerizable compounds, preferably selected from the polymerizable compounds of the Formulae RM-1 to RM-184. Of these, compounds RM-1, RM-4, RM-8, RM-17, RM-19, RM-35, RM-37, RM-39, RM-40, RM-41, RM-48, RM-52, RM-54, RM-57, RM- 58, RM-64, RM-74, RM-76, RM-88, RM-91, RM-102, RM-103, RM-109, RM-116,

[3899]

[3900] RM-117, RM-120, RM-121, RM-122, RM-139, RM-140, RM-142, RM-143, RM-145, RM-146, RM-147, RM-149, RM-156 to RM-163, RM-169, RM-170 and RM-171 to RM- 184 are particularly preferred.

[3901] 35 The following examples are intended to explain the invention without limiting it. Foreignfiling_text_P24-240-SEC-WO01

[3902] - 298 -

[3903] Above and below, percentage data denote per cent by weight. All temperatures are indicated in degrees Celsius, m.p. denotes melting point, cl.p. = clearing point. Furthermore, C = crystalline state, N = nematic phase, S = smectic phase and I = isotropic phase. The data between these symbols represent the transition 5 temperatures. Furthermore, the following symbols are used

[3904] V0Freedericks threshold voltage, capacitive [V] at 20 °C,

[3905] V10voltage [V] for 10% transmission,

[3906] neextraordinary refractive index measured at 20 °C and 589 nm, ng ordinary refractive index measured at 20 °C and 589 nm,

[3907] An optical anisotropy measured at 20 °C and 589 nm,

[3908] ε⊥dielectric susceptibility (or "dielectric constant") perpendicular to the to the longitudinal axes of the molecules at 20 °C and 1 kHz,

[3909] 15

[3910] ε|| dielectric susceptibility (or "dielectric constant") parallel to the to the longitudinal axes of the molecules at 20 °C and 1 kHz,

[3911] Δε dielectric anisotropy at 20 °C and 1 kHz,

[3912] cl.p. or

[3913] 20 T(N, I) clearing point [°C],

[3914] ν flow viscosity measured at 20 °C [mm2·s-1],

[3915] γ1rotational viscosity measured at 20 °C [mPa·s],

[3916] K1elastic constant, "splay" deformation at 20 °C [pN],

[3917] K2elastic constant, "twist" deformation at 20 °C [pN],

[3918] 25

[3919] K3elastic constant, "bend" deformation at 20 °C [pN], and

[3920] VHR voltage holding ratio.

[3921] All physical properties are determined in accordance with " Merck Liquid Crystals, Physical Properties of Liquid Crystals", status Nov. 1997, Merck KGaA, Germany, and apply for a temperature of 20°C, unless explicitly indicated otherwise.

[3922] Examples

[3923] Example M1

[3924] 35 Foreignfiling_text_P24-240-SEC-WO01

[3925] - 299 -

[3926] A nematic LC medium is formulated as follows:

[3927] Composition Properties Nr. Comp. Cone.,

[3928] 5 wt.-%

[3929] 1 APUQU-3-F 2.0 T(N, I) = 106 °C 2 CC-3-2V1 3.0 ne(589 nm, 20°C): = 1.5773 3 CC-3-V 32.75 n0(589 nm, 20°C): = 1.4852 4 CC-3-V1 7.0 An (589 nm, 20°C): = 0.0921 5 CCD-3-2 2.5 ε|| (1 kHz, 20°C): = 6.3 6 CCP-V-1 4.0 ε⊥(1 kHz, 20°C): = 3.1 15

[3930] 7 CCP-V2-1 12.0 Δε (1 kHz, 20°C): = 3.2 8 CCVC-3-V 4.75 (20°C): = 93 mPa s 9 CDUQU-3-F 8.0 K1(20°C): = 18.7 pN 20

[3931] 10 CLP-V-1 8.0 K3(20°C): = 21.0 pN 11 CLY-3-O2 5.5

[3932] 12 DGUQU-4-F 2.5

[3933] 25 13 LB(S)-3-OT 2.0

[3934] 14 PCH-302 2.0

[3935] 15 PP-1-2V1 4.0

[3936]

[3937] Mixture Example S1 (stabilised with compound of Formula H-3-1)

[3938] A nematic LC mixture according to the invention is formulated as follows:

[3939] Mixture M1 99.95 wt.-%

[3940] 35

[3941] Compound of Formula H-3-1 500 ppm

[3942]

[3943] Foreignfiling_text_P24-240-SEC-WO01

[3944] - 300 -

[3945] Addition of 500 ppm of the compound of Formula H-3-1 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M1, without affecting the remaining physical properties of the mixture M1.

[3946] 5

[3947]

[3948] Example M2

[3949] A nematic LC medium is formulated as follows:

[3950] 15

[3951] Composition Properties

[3952] Nr. Comp. Cone.,

[3953] wt.-%

[3954] 20 1 CC-3-V 40.5 T(N, I) = 81.5 °C

[3955] 2 CC-3-V1 6.0 An (589 nm, 20°C): = 0.1112

[3956] 3 CCP-V-1 4.5 As (1 kHz, 20°C): = 7.0

[3957] 4 BCH-3F. F. F 7.0 (20°C): = 68 mPa s 25

[3958] 5 CPGU-3-OT 5.0 (20°C): = 13.8 pN

[3959] 6 APUQU-2-F 5.0 K3(20°C): = 13.3 pN

[3960] 7 APUQU-3-F 7.5

[3961] 8 PGP-2-3 6.0

[3962] 9 PGP-2-4 6.0

[3963] 10 PPGU-3-F 0.5

[3964] 35 11 PUQU-3-F 7.0

[3965] 12 CCD-3-3 5.0

[3966]

[3967] Foreignfiling_text_P24-240-SEC-WO01

[3968] - 301 -

[3969] Mixture Example S2 (stabilised with compound of Formula ST-4-2)

[3970] A nematic LC mixture according to the invention is formulated as follows:

[3971] 5

[3972] Mixture M2 99.9 wt.-%

[3973] Compound of Formula ST-4-2 1 000 ppm

[3974]

[3975] Addition of 1000 ppm of the compound of the Formula ST-4-2 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M2, without affecting the remaining physical properties of the mixture.

[3976] 15

[3977] ST-4-2

[3978] 20

[3979]

[3980] Example M3

[3981] A nematic LC medium is formulated as follows:

[3982] 25

[3983] Composition Properties

[3984] Nr. Comp. Cone.,

[3985] wt.-%

[3986] 1 CC-3-V 46.0 T(N, I) = 87.0 °C

[3987] 2 CCGU-3-F 2.0 An (589 nm, 20°C): = 0.1159

[3988] 3 CCP-3F. F. F 3.0 As (1 kHz, 20°C): = 7.3

[3989] 4 CLU-3-F 7.5 (20°C): = 77 mPa s

[3990] 35

[3991] 5 DLGU-3-F 9.0 K! (20°C): = 14.8 pN

[3992]

[3993] Foreignfiling_text_P24-240-SEC-WO01

[3994] - 302 -

[3995] 6 DPGU-4-F 5.0 K3(20°C): = 13.8 pN

[3996] 7 PCH-302 2.0

[3997] 8 PGP-2-2V 11.0

[3998] 5 9 PGU-3-F 8.5

[3999] 10 PPGU-3-F 1.0

[4000] 11 CCD-3-3 5.0

[4001]

[4002] Mixture Example S3 (stabilised with compound of Formula H-3-3)

[4003] A nematic LC mixture according to the invention is formulated as follows:

[4004] 15 Mixture M3 99.9 wt.-%

[4005] Compound of Formula H-3-3 1 000 ppm

[4006]

[4007] Addition of 1 000 ppm of the compound of Formula H-3-3 significantly improves the 20 VHR100after UV exposure compared to the non-stabilized mixture M3, without affecting the remaining physical properties of the mixture.

[4008] 25

[4009] H-3-3

[4010]

[4011] Example M4

[4012] A nematic LC medium is formulated as follows:

[4013] Composition Properties

[4014] 35

[4015] Nr. Comp. Cone.,

[4016] wt.-%

[4017]

[4018] Foreignfiling_text_P24-240-SEC-WO01

[4019] - 303 -

[4020] 1 CC-3-V 27.5 T(N, I) = 86.5 °C

[4021] 2 CC-3-V1 10.0 An (589 nm, 20°C): = 0.1234

[4022] 3 CCP-3-OT 8.0 Δε (1 kHz, 20°C): = 3.2

[4023] 5 4 CCP-V2-1 5.5 Y1 (20°C): = 72 mPa s

[4024] 5 CDUQU-3-F 1.0 K1(20°C): = 19.7 pN

[4025] 6 CLP-3-T 7.0 K3(20°C): = 16.6 pN

[4026] 7 DGUQU-4-F 4.0

[4027] 8 PCH-302 5.0

[4028] 9 PGP-2-2V 4.0

[4029] 10 PP-1-2V1 10.0

[4030] 15

[4031] 11 PPGU-3-F 1.0

[4032] 12 PUS-3-2 12.0

[4033] 13 CCD-3-3 5.0

[4034]

[4035] 20

[4036] Mixture Example S4 (stabilised with compound of Formula ST-1-3)

[4037] A nematic LC mixture according to the invention is formulated as follows:

[4038] 25 Mixture M4 99.95 wt.-%

[4039] Compound of Formula ST-1-3 500 ppm

[4040]

[4041] Addition of 400 ppm of the compound of the Formula ST-1-3 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M4, without affecting the remaining physical properties of the mixture.

[4042] 35 Foreignfiling_text_P24-240-SEC-WO01

[4043] - 304 -

[4044] ST- 1-3

[4045] 5

[4046]

[4047] Example M5

[4048] A nematic LC medium is formulated as follows:

[4049] Composition Properties Nr. Comp. Cone.,

[4050] 15 wt.-%

[4051] 1 CC-3-2V1 4.0 T(N, I) = 91.0 °C 2 CC-3-V 36.5 An (589 nm, 20°C): = 0.1228 3 CC-3-V1 8.0 As (1 kHz, 20°C): = 3.3 20

[4052] 4 CCP-V2-1 4.0 Y1 (20°C): = 71 mPa s 5 CLP-V-1 7.0 K1(20°C): = 19.3 pN 6 CLU-3-F 1.5 K3(20°C): = 16.4 pN 25 7 DLGU-3-F 10.0

[4053] 8 PGP-1-2V 5.0

[4054] 9 PP-1-2V1 9.0

[4055] 10 PPGU-3-F 1.0

[4056] 11 PUS-3-2 9.0

[4057] 12 CCD-3-3 5.0

[4058]

[4059] Mixture Example S5 (stabilised with compound of Formula ST-2-3) 35

[4060] A nematic LC mixture according to the invention is formulated as follows: Foreignfiling_text_P24-240-SEC-WO01

[4061] - 305 -

[4062] Mixture M5 99.96 wt.-%

[4063] Compound of Formula ST-2-3 400 ppm

[4064]

[4065] 5

[4066] Addition of 400 ppm of the compound of the Formula ST-2-3 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M5, without affecting the remaining physical properties of the mixture.

[4067] ST-2-3

[4068] 15

[4069]

[4070] Example M6

[4071] 20 A nematic LC medium is formulated as follows:

[4072] Composition Properties

[4073] Nr. Comp. Cone.,

[4074] 25 wt.-%

[4075] 1 APUQU-2-F 4.5 T(N, I) = 90.5 °C

[4076] 2 APUQU-3-F 6.0 An (589 nm, 20°C): = 0.1014

[4077] 3 CC-3-2V1 2.5 As (1 kHz, 20°C): = 13.6

[4078] 4 CC-3-V 33.5 (20°C): = 104 mPa s

[4079] 5 CC-3-V1 8.0 K1(20°C): = 15.0 pN

[4080] 6 CCP-3-OT 6.5 K3(20°C): = 17.1 pN

[4081] 35 7 CDUQU-3-F 8.0

[4082] 8 CLP-3-T 6.0

[4083]

[4084] Foreignfiling_text_P24-240-SEC-WO01

[4085] - 306 -

[4086] 9 DGUQU-4-F 5.0

[4087] 10 PGUQU-3-F 3.0

[4088] 11 PGUQU-4-F 5.0

[4089] 5 12 PGUQU-5-F 5.0

[4090] 13 PPGU-3-F 0.5

[4091] 14 PUQU-3-F 1.5

[4092] 15 CCD-3-3 5.0

[4093]

[4094] Mixture Example S6 (stabilised with compound of Formula H-3-2)

[4095] A nematic LC mixture according to the invention is formulated as follows:

[4096] 15

[4097] Mixture M6 99.995 wt.-%

[4098] Compound of Formula H-3-2 50 ppm

[4099]

[4100] 20 Addition of 50 ppm of the compound of the Formula H-3-2 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M6, without affecting the remaining physical properties of the mixture.

[4101] 25

[4102] H-3-2

[4103]

[4104] Example M7

[4105] A nematic LC medium is formulated as follows:

[4106] 35

[4107] Composition Properties

[4108]

[4109] Foreignfiling_text_P24-240-SEC-WO01

[4110] - 307 -

[4111] Nr. Comp. Cone.,

[4112] wt.-%

[4113] 1 CC-3-2V1 3.0 T(N, I) = 92.0 °C

[4114] 2 CC-3-V 20.0 An (589 nm, 20°C): = 0.1219

[4115] 5

[4116] 3 CC-3-V1 6.0 As (1 kHz, 20°C): = 13.5

[4117] 4 CC-4-V1 3.0 (20°C): = 134 mPa s

[4118] 5 CLU-3-F 20.0 K1(20°C): = 15.8 pN

[4119] 6 CCGU-3-F 4.0 K3(20°C): = 14.1 pN

[4120] 7 DLGU-3-F 10.0

[4121] 8 DPGU-4-F 6.0

[4122] 15 9 PCH-302 2.0

[4123] 10 PGU-2-F 10.0

[4124] 11 PGU-3-F 10.0

[4125] 12 PPGU-3-F 1.0

[4126] 20

[4127] 13 CCD-3-3 5.0

[4128]

[4129] Mixture Example S7 (stabilised with compound of Formula H-3-4)

[4130] 25 A nematic LC mixture according to the invention is formulated as follows:

[4131] Mixture M7 99.995 wt.-%

[4132] Compound of Formula H-3-4 50 ppm

[4133]

[4134] Addition of 50 ppm of the compound of the Formula H-3-4 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M7, without affecting the remaining physical properties of the mixture.

[4135] 35 Foreignfiling_text_P24-240-SEC-WO01

[4136] - 308 -

[4137] H-3-4 5

[4138]

[4139] Example M8

[4140] A nematic LC medium is formulated as follows:

[4141] Composition Properties

[4142] Nr. Comp. Cone.,

[4143] wt.-%

[4144] 15

[4145] 1 APUQU-2-F 4.5 T(N, I) = 90.5 °C

[4146] 2 CC-3-V 28.35 An (589 nm, 20°C): = 0.0979

[4147] 3 CC-3-V1 5.85 ε||(1 kHz, 20°C): = 8.6

[4148] 20

[4149] 4 CCP-3-3 5.4 ε⊥(1 kHz, 20°C): = 3.0

[4150] 5 CCP-V-1 10.8 Δε (1 kHz, 20°C): = 5.6

[4151] 6 CCP-V2-1 10.8 (20°C): = 87 mPa s

[4152] 25 7 CPGP-5-2 1.8 (20°C): = 15.6 pN

[4153] 8 PP-1-2V1 4.5 K3(20°C): = 17.3 pN

[4154] PUQU-3-F

[4155] 9 18.0 V0(20°C): = 1.76 V

[4156] 10 CCD-5-2 10.0

[4157]

[4158] Mixture Example S8 (stabilised with compound of Formula H-3-6)

[4159] A nematic LC mixture according to the invention is formulated as follows:

[4160] 35 Foreignfiling_text_P24-240-SEC-WO01

[4161] - 309 -

[4162] Mixture M8 99.995 wt.-%

[4163] Compound of Formula H-3-6 50 ppm

[4164]

[4165] 5 Addition of 50 ppm of the compound of the Formula H-3-6 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M8, without affecting the remaining physical properties of the mixture.

[4166] 15

[4167] H-3-6

[4168] 20

[4169]

[4170] Example M9

[4171] 25

[4172] A nematic LC medium is formulated as follows:

[4173] Composition Properties

[4174] Nr. Comp. Cone.,

[4175] wt.-%

[4176] 1 APUQU-2-F 4.5 T(N, I) = 90.0 °C

[4177] 2 CC-3-V 28.35 An (589 nm, 20°C): = 0.0983

[4178] 35

[4179] 3 CC-3-V1 5.85 ε||(1 kHz, 20°C): = 8.7

[4180]

[4181] Foreignfiling_text_P24-240-SEC-WO01

[4182] - 310 -

[4183] 4 CCP-3-3 5.4 ε⊥(1 kHz, 20°C): = 3.0

[4184] 5 CCP-V-1 10.8 Δε (1 kHz, 20°C): = 5.7

[4185] 6 CCP-V2-1 10.8 (20°C): = 83 mPa s

[4186] 5

[4187] 7 CPGP-5-2 1.8 (20°C): = 15.6 pN

[4188] 8 PP-1-2V1 4.5 K3(20°C): = 17.1 pN

[4189] PUQU-3-F

[4190] 9 18.0 V0(20°C): = 1.75 V

[4191] 10 CCD-3-2 10.0

[4192]

[4193] Mixture Example S9 (stabilised with compound of Formula H-3-7)

[4194] A nematic LC mixture according to the invention is formulated as follows:

[4195] 15

[4196] Mixture M9 99.95 wt.-%

[4197] Compound of Formula H-3-7 500 ppm

[4198] 20

[4199]

[4200] Addition of 500 ppm of the compound of Formula H-3-7 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M9, without affecting the remaining physical properties of the mixture.

[4201] 25

[4202] H-3-7

[4203] 35

[4204]

[4205] Foreignfiling_text_P24-240-SEC-WO01

[4206] - 311 -

[4207] Example M10

[4208] A nematic LC medium is formulated as follows:

[4209] 5 Composition Properties

[4210] Nr. Comp. Cone.,

[4211] wt.-%

[4212] 1 APUQU-3-F 2.0 T(N, I) = 106 °C 2 CC-3-2V1 3.0 An (589 nm, 20°C): = 0.0921 3 CC-3-V 32.75 ε|| (1 kHz, 20°C): = 6.3 4 CC-3-V1 7.0 ε⊥(1 kHz, 20°C): = 3.1

[4213] 15 5 CCD-3-2 2.5 Δε (1 kHz, 20°C): = 3.2

[4214] 6 CCP-V-1 4.0 (20°C): = 93 mPa s 7 CCP-V2-1 12.0 K1(20°C): = 18.7 pN 8 CCVC-3-V 4.75 K3(20°C): = 21.0 pN 20

[4215] CDUQU-3-F

[4216] 9 8.0 V0(20°C): = 2.56 V CLP-V-1

[4217] 10 8.0

[4218] CLY-3-O2

[4219] 11 5.5

[4220] 25 DGUQU-4-F

[4221] 12 2.5

[4222] LB(S)-3-OT

[4223] 13 2.0

[4224] PCH-302

[4225] 14 2.0

[4226] 15 PP-1-2V1 4.0

[4227]

[4228] Mixture Example S10 (stabilised with compound of Formula H-3-5)

[4229] A nematic LC mixture according to the invention is formulated as follows: 35

[4230] Mixture M10 99.995 wt.-%

[4231]

[4232] Foreignfiling_text_P24-240-SEC-WO01

[4233] - 312 -

[4234] Compound of Formula H-3-5 50 ppm

[4235]

[4236] Addition of 50 ppm of the compound of the Formula H-3-5 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M10, without 5

[4237] affecting the remaining physical properties of the mixture.

[4238] H-3-5

[4239]

[4240] 15

[4241] Example M11

[4242] A nematic LC medium is formulated as follows:

[4243] Composition

[4244] 20 Properties

[4245] Cone.,

[4246] Nr. Comp.

[4247] wt.-%

[4248] 1 CCQU-2-F 14.0 T(N, I) = 127.4 °C

[4249] 25 2 CCQU-3-F 16.0 An (589 nm, 20°C): = 0.0864

[4250] 3 CCQU-5-F 15.0 ε||(1 kHz, 20°C): = 14.4

[4251] 4 CCP-1F. F. F 3.0 ε⊥(1 kHz, 20°C): = 3.4

[4252] 5 CCP-2F. F. F 7.0 Δε (1 kHz, 20°C): = 11.0

[4253] 6 CCP-3F. F. F 13.0 K1(20°C): = 14.0 pN

[4254] 7 CCP-5F. F. F 5.0 K3(20°C): = 21.3 pN

[4255] 8 CCGU-3-F 8.0 V0(20°C): = 1.19 V

[4256] 35

[4257] 9 CCP-3-1 8.0

[4258]

[4259] Foreignfiling_text_P24-240-SEC-WO01

[4260] - 313 -

[4261] 10 CBC-53F 4.0

[4262] 11 CBC-33F 2.0

[4263] 15 CCD-3-2 5.0

[4264]

[4265] 5

[4266] Mixture Example S11 (stabilised with compound of Formula H-3-9)

[4267] A nematic LC mixture according to the invention is formulated as follows:

[4268] Mixture M11 99.995 wt.-%

[4269] Compound of Formula H-3-9 50 ppm

[4270]

[4271] Addition of 50 ppm of the compound of the Formula H-3-9 significantly improves the 15

[4272] VHR100after UV exposure compared to the non-stabilized mixture M11, without affecting the remaining physical properties of the mixture.

[4273] 20

[4274] 25

[4275] H-3-9

[4276]

[4277] 35

[4278] Example M12 Foreignfiling_text_P24-240-SEC-WO01

[4279] - 314 -

[4280] A nematic LC medium is formulated as follows:

[4281] Composition Properties

[4282] 5 Cone.,

[4283] Nr. Comp.

[4284] wt.-%

[4285] 1 CCD-3-2 10.0 T(N, I) = 90 °C

[4286] 2 APUQU-2-F 4.5 An (589 nm, 20°C): = 0.0983

[4287] 3 CC-3-V 28.35 ε||(1 kHz, 20°C): = 8.7

[4288] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[4289] 5 CCP-3-3 5.4 Δε (1 kHz, 20°C): = 5.7

[4290] 15

[4291] 6 CCP-V-1 10.8 (20°C): = 83 mPa s

[4292] 7 CCP-V2-1 10.8 K1(20°C): = 15.6 pN

[4293] 8 CPGP-5-2 1.8 K3(20°C): = 17.1 pN

[4294] 20 9 PP-1-2V1 4.5 V0(20°C): = 1.75 V

[4295] 10 PUQU-3-F 18.0

[4296]

[4297] Mixture Example S12 (stabilised with compound of Formula ST-4-1)

[4298] 25

[4299] A nematic LC mixture according to the invention is formulated as follows:

[4300] Mixture M12 99.9 wt.-%

[4301] Compound of Formula ST-4-1 1 000 ppm

[4302]

[4303] Addition of 1000 ppm of the compound of the Formula ST-4-1 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M12, without 35 affecting the remaining physical properties of the mixture. Foreignfiling_text_P24-240-SEC-WO01

[4304] - 315 -

[4305] ST-4-1

[4306] 5

[4307]

[4308] Example M13

[4309] A nematic LC medium is formulated as follows:

[4310] Composition Properties

[4311] Cone.,

[4312] Nr. Comp.

[4313] wt.-%

[4314] 15

[4315] 1 CCD-3-2 10.0 T(N, I) = 90.5 °C 2 APUQU-(c5)-F 4.5 An (589 nm, 20°C): = 0.0987

[4316] 3 CC-3-V 28.35 ε||(1 kHz, 20°C): = 8.6

[4317] 20 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[4318] 5 CCP-3-3 5.4 Δε (1 kHz, 20°C): = 5.6

[4319] 6 CCP-V-1 10.8 (20°C): = 85 mPa s 25 7 CCP-V2-1 10.8 K1(20°C): = 15.7 pN 8 CPGP-5-2 1.8 K3(20°C): = 17.3 pN PP-1-2V1

[4320] 9 4.5

[4321] 10 PUQU-3-F 18.0

[4322]

[4323] APUQU-(c5)-F

[4324] 35

[4325] Mixture Example S13 (stabilised with compound of Formula H-3-8) Foreignfiling_text_P24-240-SEC-WO01

[4326] - 316 -

[4327] A nematic LC mixture according to the invention is formulated as follows:

[4328] Mixture M13 99.95 wt.-%

[4329] 5

[4330] Compound of Formula H-3-8 500 ppm

[4331]

[4332] Addition of 500 ppm of the compound of Formula H-3-8 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M13, without affecting the remaining physical properties of the mixture.

[4333] 15

[4334] H-3-8 20

[4335] 2

[4336]

[4337] 5

[4338] Example M14

[4339] A nematic LC medium is formulated as follows:

[4340] Composition Properties

[4341] Cone.,

[4342] Nr. Comp.

[4343] wt.-%

[4344] 35 1 CCD-3-2 10.0 T(N, I) = 90 °C

[4345]

[4346] Foreignfiling_text_P24-240-SEC-WO01

[4347] - 317 -

[4348] 2 APUQU-2-F 4.5 An (589 nm, 20°C): = 0.1027

[4349] 3 CC-3-V 28.35 ε||(1 kHz, 20°C): = 8.7

[4350] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[4351] 5

[4352] 5 BCH-31 5.4 Δε (1 kHz, 20°C): = 5.7

[4353] 6 CCP-V-1 10.8 γ1 (20°C): = 82 mPa s

[4354] 7 CCP-V2-1 10.8 K1(20°C): = 15.6 pN

[4355] 8 CPGP-5-2 1.8 K3(20°C): = 16.8 pN

[4356] PP-1-2V1

[4357] 9 4.5

[4358] 10 PUQU-3-F 18.0

[4359]

[4360] 15

[4361] Mixture Example S14 (stabilised with compound of Formula H-3-10)

[4362] A nematic LC mixture according to the invention is formulated as follows:

[4363] 20 Mixture M14 99.99 wt.-%

[4364] Compound of Formula H-3-10 100 ppm

[4365]

[4366] Addition of 100 ppm of the compound of the Formula H-3-10 significantly improves 25 the VHR100after UV exposure compared to the non-stabilized mixture M14, without affecting the remaining physical properties of the mixture.

[4367] 35 Foreignfiling_text_P24-240-SEC-WO01

[4368] - 318 -

[4369] 5

[4370] H-3-10

[4371] 15

[4372]

[4373] Example M15

[4374] 20 A nematic LC medium is formulated as follows:

[4375] Composition Properties

[4376] Cone.,

[4377] Nr. Comp.

[4378] 25 wt.-%

[4379] 1 CCD-3-2 10.0 T(N, I) = 88 °C

[4380] 2 APUQU-2-F 4.5 An (589 nm, 20°C): = 0.0982

[4381] 3 CC-3-V 28.35 ε||(1 kHz, 20°C): = 8.7

[4382] 4 CC-V-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[4383] 5 CCP-3-3 5.4 Δε (1 kHz, 20°C): = 5.7

[4384] 6 CCP-V-1 10.8 (20°C): = 83 mPa s

[4385] 35

[4386] 7 CCP-V2-1 10.8 K1(20°C): = 15.0 pN

[4387]

[4388] Foreignfiling_text_P24-240-SEC-WO01

[4389] - 319 -

[4390] 8 CPGP-5-2 1.8 K3(20°C): = 16.7 pN

[4391] 9 PP-1-2V1 4.5

[4392] 10 PUQU-3-F 18.0

[4393]

[4394] 5

[4395] Mixture Example S15 (stabilised with compound of Formula H-3-11)

[4396] A nematic LC mixture according to the invention is formulated as follows:

[4397] Mixture M15 99.99 wt.-%

[4398] Compound of Formula H-3-11 100 ppm

[4399]

[4400] 15 Addition of 100 ppm of the compound of the Formula H-3-11 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M15, without affecting the remaining physical properties of the mixture.

[4401] 20

[4402] 25 H-3-11

[4403]

[4404] Example M16

[4405] 35 A nematic LC medium is formulated as follows: Foreignfiling_text_P24-240-SEC-WO01

[4406] - 320 -

[4407] Composition Properties

[4408] Cone.,

[4409] Nr. Comp.

[4410] wt.-%

[4411] 1 CCD-3-2 10.0 T(N, I) = 92.5 °C

[4412] 5

[4413] 2 APUQU-2-F 4.5 An (589 nm, 20°C): = 0.0993

[4414] 3 CC-3-V 28.35 ε||(1 kHz, 20°C): = 8.7

[4415] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[4416] 5 CCP-3-O1 5.4 Δε (1 kHz, 20°C): = 5.7

[4417] 6 CCP-V-1 10.8 (20°C): = 86 mPa s

[4418] 7 CCP-V2-1 10.8 K1(20°C): = 15.5 pN

[4419] 15

[4420] 8 CPGP-5-2 1.8 K3(20°C): = 17.4 pN

[4421] 9 PP-1-2V1 4.5

[4422] 10 PUQU-3-F 18.0

[4423]

[4424] 20

[4425] Mixture Example S16 (stabilised with compound of Formula H-3-12)

[4426] A nematic LC mixture according to the invention is formulated as follows:

[4427] 25 Mixture M16 99.99 wt.-%

[4428] Compound of Formula H-3-12 100 ppm

[4429]

[4430] Addition of 100 ppm of the compound of the Formula H-3-12 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M16, without affecting the remaining physical properties of the mixture.

[4431] 35 Foreignfiling_text_P24-240-SEC-WO01

[4432] - 321 -

[4433] 5

[4434] H-3-12

[4435] 15

[4436]

[4437] Example M17

[4438] 20

[4439] A nematic LC medium is formulated as follows:

[4440] Composition Properties

[4441] 25 Cone.,

[4442] Nr. Comp.

[4443] wt.-%

[4444] 1 CCD-3-2 10.0 T(N, I) = 90.5 °C

[4445] 2 APUQU-2-F 4.5 An (589 nm, 20°C): = 0.0974

[4446] 3 CC-3-V 28.35 ε||(1 kHz, 20°C): = 8.7

[4447] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[4448] 5 CCP-3-3 5.4 Δε (1 kHz, 20°C): = 5.7

[4449] 35 6 CCP-V-1 10.8 γ1 (20°C): = 82 mPa s

[4450] 7 CCP-V2-1 10.8 K1(20°C): = 15.6 pN

[4451]

[4452] Foreignfiling_text_P24-240-SEC-WO01

[4453] - 322 -

[4454] 8 CCPP-V-2 1.8 K3(20°C): = 17.2 pN

[4455] 9 PP-1-2V1 4.5

[4456] 10 PUQU-3-F 18.0

[4457]

[4458] 5

[4459] Mixture Example S17 (stabilised with compound of Formula H-3-13)

[4460] A nematic LC mixture according to the invention is formulated as follows:

[4461] Mixture M17 99.99 wt.-%

[4462] Compound of Formula H-3-13 100 ppm

[4463]

[4464] 15 Addition of 100 ppm of the compound of the Formula H-3-13 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M17, without affecting the remaining physical properties of the mixture.

[4465] 20

[4466] 25

[4467] H-3-13

[4468]

[4469] 35

[4470] Example M18 Foreignfiling_text_P24-240-SEC-WO01

[4471] - 323 -

[4472] A nematic LC medium is formulated as follows:

[4473] Composition Properties

[4474] Cone.,

[4475] 5 Nr. Comp.

[4476] wt.-%

[4477] 1 CCD-3-2 10.0 T(N, I) = 89.5 °C

[4478] 2 APUQU-2-F 4.5 An (589 nm, 20°C): = 0.0968

[4479] 3 CC-3-V 28.35S|| (1 kHz, 20°C): = 8.9

[4480] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[4481] 5 CCP-3-3 5.4 As (1 kHz, 20°C): = 5.9

[4482] 6 CCP-V-1 10.8 γ1 (20°C): = 82 mPa s

[4483] 15

[4484] 7 CCP-V2-1 10.8 K1(20°C): = 15.5 pN

[4485] 8 CCPU-3-F 1.8 K3(20°C): = 17.0 pN

[4486] 9 PP-1-2V1 4.5

[4487] 20 10 PUQU-3-F 18.0

[4488]

[4489] Mixture Example S18 (stabilised with compound of Formula H-3-14)

[4490] A nematic LC mixture according to the invention is formulated as follows:

[4491] 25

[4492] Mixture M18 99.99 wt.-%

[4493] Compound of Formula H-3-14 100 ppm

[4494]

[4495] Addition of 100 ppm of the compound of the Formula H-3-14 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M18, without affecting the remaining physical properties of the mixture.

[4496] 35 Foreignfiling_text_P24-240-SEC-WO01

[4497] - 324 -

[4498] 5

[4499] H-3-14

[4500] 15

[4501]

[4502] Example M19

[4503] 20

[4504] A nematic LC medium is formulated as follows:

[4505] Composition Properties

[4506] Cone.,

[4507] 25 Nr. Comp.

[4508] wt.-%

[4509] 1 CCD-3-2 10.0 T(N, I) = 93 °C

[4510] 2 APUQU-2-F 4.5 An (589 nm, 20°C): = 0.1015

[4511] 3 CC-3-V 28.35 ε||(1 kHz, 20°C): = 8.7

[4512] 4 CC-3-V1 5.85 s± (1 kHz, 20°C): = 3.0

[4513] 5 CLP-3-01 5.4 Δε (1 kHz, 20°C): = 5.7

[4514] CCP-V-1 (20°C): = 88 mPa s

[4515] 35 6 10.8

[4516] 7 CCP-V2-1 10.8 K1 (20°C): = 15.9 pN

[4517]

[4518] Foreignfiling_text_P24-240-SEC-WO01

[4519] - 325 -

[4520] 8 CPGP-5-2 1.8 K3(20°C): = 17.6 pN

[4521] PP-1-2V1

[4522] 9 4.5

[4523] 10 PUQU-3-F 18.0

[4524]

[4525] 5

[4526] Mixture Example S18 (stabilised with compound of Formula H-3-15)

[4527] A nematic LC mixture according to the invention is formulated as follows:

[4528] Mixture M18 99.99 wt.-%

[4529] Compound of Formula H-3-15 100 ppm

[4530]

[4531] 15 Addition of 100 ppm of the compound of the Formula H-3-15 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M18, without affecting the remaining physical properties of the mixture.

[4532] 20

[4533] 25

[4534] 35 Foreignfiling_text_P24-240-SEC-WO01

[4535] - 326 -

[4536] 5

[4537] 15

[4538]

[4539] 20

[4540] Example M20

[4541] A nematic LC medium is formulated as follows:

[4542] 25 Composition Properties

[4543] Cone.,

[4544] Nr. Comp.

[4545] wt.-%

[4546] 1 CCD-3-2 10.0 T(N, I) = 90.5 °C

[4547] 2 CGUQU-3-F 4.5 An (589 nm, 20°C): = 0.0983

[4548] 3 CC-3-V 28.35S|| (1 kHz, 20°C): = 8.5

[4549] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[4550] 35 5 CCP-3-3 5.4 As (1 kHz, 20°C): = 5.5

[4551]

[4552] Foreignfiling_text_P24-240-SEC-WO01

[4553] - 327 -

[4554] 6 CCP-V-1 10.8 (20°C): = 84 mPa s

[4555] 7 CCP-V2-1 10.8 K1 (20°C): = 15.5 pN

[4556] 8 CPGP-5-2 1.8 K3(20°C): = 17.3 pN

[4557] 5

[4558] PP-1-2V1

[4559] 9 4.5 VQ (20°C): = 1.75 V

[4560] 10 PUQU-3-F 18.0

[4561]

[4562] Mixture Example S20 (stabilised with compound of Formula H-3-16)

[4563] A nematic LC mixture according to the invention is formulated as follows:

[4564] Mixture M20 99.99 wt.-%

[4565] 15

[4566] Compound of Formula H-3-16 100 ppm

[4567]

[4568] Addition of 100 ppm of the compound of the Formula H-3-16 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M20, without 20

[4569] affecting the remaining physical properties of the mixture.

[4570] 25

[4571] 35 Foreignfiling text P24-240-SEC-W001

[4572] - 328 -

[4573] 5

[4574] H-3-16

[4575] 15

[4576] 20

[4577]

[4578] Example M21

[4579] 25 A nematic LC medium is formulated as follows:

[4580] Composition Properties

[4581] Cone.,

[4582] Nr. Comp.

[4583] wt.-%

[4584] 1 CCD-3-2 10.0 T(N, I) = 90 °C

[4585] 2 APUQU-2-F 4.5 An (589 nm, 20°C): = 0.0959

[4586] 3 CC-3-V 28.35S|| (1 kHz, 20°C): = 8.3

[4587] 35

[4588] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[4589]

[4590] Foreignfiling_text_P24-240-SEC-WO01

[4591] - 329 -

[4592] 5 CCP-3-3 5.4 As (1 kHz, 20°C): = 5.3

[4593] 6 CCP-V-1 10.8 Y1 (20°C): = 88 mPa s

[4594] 7 CCP-V2-1 10.8 K-| (20°C): = 16.0 pN

[4595] 5

[4596] 8 CPGP-5-2 1.8 K3(20°C): = 17.6 pN

[4597] 9 PP-1-2V1 4.5 V0(20°C): = 1.75 V

[4598] 10 PUQU-3-F 9.0

[4599] 11 PUQU-(c5)-F 9.0

[4600]

[4601] PUQU-(c5)-F

[4602] 15

[4603] Mixture Example S21 (stabilised with compound of Formula H-3-17)

[4604] 20 A nematic LC mixture according to the invention is formulated as follows:

[4605] Mixture M21 99.99 wt.-%

[4606] Compound of Formula H-3-17 100 ppm

[4607] 25

[4608]

[4609] Addition of 100 ppm of the compound of the Formula H-3-17 significantly improves the VHR100 after UV exposure compared to the non-stabilized mixture M21, without affecting the remaining physical properties of the mixture.

[4610] 35 Foreignfiling_text_P24-240-SEC-WO01

[4611] - 330 -

[4612] 5

[4613] H-3-17

[4614]

[4615] Example M22

[4616] 15

[4617] A nematic LC medium is formulated as follows:

[4618] Composition Properties

[4619] Cone.,

[4620] Nr. Comp.

[4621] 20 wt.-%

[4622] 1 CCD-3-2 10.0 T(N, I) = 90 °C

[4623] 2 APUQU-2-F 4.5 An (589 nm, 20°C): = 0.0977

[4624] 3 CC-3-V 28.35 ε||(1 kHz, 20°C): = 8.7

[4625] 25

[4626] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[4627] 5 CCP-3-3 5.4 Δε (1 kHz, 20°C): = 5.7

[4628] 6 CCP-V-1 10.8 Y1 (20°C): = 87 mPa s

[4629] 7 CCP-V2-1 10.8 K1 (20°C): = 15.2 pN

[4630] 8 CPGP-5-2 1.8 K3(20°C): = 17.0 pN

[4631] 9 PP-1-2V1 4.5

[4632] 35 10 PUQU-3-F 9.0

[4633] 11 PUQU(1)-3-F 9.0

[4634]

[4635] Foreignfiling_text_P24-240-SEC-WO01

[4636] - 331 -

[4637] PUQU(1)-3-F

[4638]

[4639] Mixture Example S22 (stabilised with compound of Formula H-3-18)

[4640] A nematic LC mixture according to the invention is formulated as follows:

[4641] Mixture M22 99.99 wt.-%

[4642] Compound of Formula H-3-18 100 ppm

[4643]

[4644] Addition of 100 ppm of the compound of the Formula H-3-18 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M22, without affecting the remaining physical properties of the mixture.

[4645]

[4646] Foreignfiling_text_P24-240-SEC-WO01

[4647] - 332 -

[4648] Example M23

[4649] A nematic LC medium is formulated as follows:

[4650] 5 Composition Properties

[4651] Cone.,

[4652] Nr. Comp.

[4653] wt.-%

[4654] 1 CCD-3-2 10.0 T(N, I) = 89.5 °C

[4655] 2 APUQU-2-F 4.5 An (589 nm, 20°C): = 0.0968

[4656] 3 CC-3-V 28.35 ε||(1 kHz, 20°C): = 8.7

[4657] 4 CC-3-2V 5.85 ε⊥(1 kHz, 20°C): = 3.0

[4658] 15 5 CCP-3-3 5.4 Δε (1 kHz, 20°C): = 5.7

[4659] 6 CCP-V-1 10.8 Y1 (20°C): = 81 mPa s

[4660] 7 CCP-V2-1 10.8 K1(20°C): = 15.7 pN

[4661] 8 CPGP-5-2 1.8 K3(20°C): = 16.9 pN

[4662] 20

[4663] 9 PP-1-2V1 4.5

[4664] 10 PUQU-3-F 18.0

[4665]

[4666] Mixture Example S23 (stabilised with compound of Formula H-3-19)

[4667] 25

[4668] A nematic LC mixture according to the invention is formulated as follows:

[4669] Mixture M23 99.99 wt.-%

[4670] Compound of Formula H-3-19 100 ppm

[4671]

[4672] Addition of 100 ppm of the compound of the Formula H-3-19 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M23, without 35

[4673] affecting the remaining physical properties of the mixture. Foreignfiling_text_P24-240-SEC-WO01

[4674] - 333 -

[4675] 5

[4676] H-3-19

[4677]

[4678] Example M24

[4679] 15

[4680] A nematic LC medium is formulated as follows:

[4681] Composition Properties

[4682] Cone.,

[4683] 20 Nr. Comp.

[4684] wt.-%

[4685] 1 CCD-3-2 10.0 T(N, I) = 90.5 °C

[4686] 2 APUQU-2-F 4.5 An (589 nm, 20°C): = 0.1006

[4687] 25 3 CC-3-V 28.35 ε||(1 kHz, 20°C): = 8.7

[4688] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[4689] 5 CLG-3-1 5.4 Δε (1 kHz, 20°C): = 5.7

[4690] 6 CCP-V-1 10.8 Y1 (20°C): = 85 mPa s

[4691] 7 CCP-V2-1 10.8 K1(20°C): = 15.7 pN

[4692] 8 CPGP-5-2 1.8 K3(20°C): = 17.1 pN

[4693] PP-1-2V1

[4694] 9 4.5

[4695] 35

[4696] 10 PUQU-3-F 18.0

[4697]

[4698] Foreignfiling_text_P24-240-SEC-WO01

[4699] - 334 -

[4700] Mixture Example S24 (stabilised with compound of Formula H-3-20)

[4701] A nematic LC mixture according to the invention is formulated as follows:

[4702] Mixture M24 99.99 wt.-%

[4703] Compound of Formula H-3-20 100 ppm

[4704]

[4705] Addition of 100 ppm of the compound of the Formula H-3-20 significantly improves 10

[4706] the VHR100after UV exposure compared to the non-stabilized mixture M24, without affecting the remaining physical properties of the mixture.

[4707] H-3-20

[4708]

[4709] 25

[4710] Example M25

[4711] A nematic LC medium is formulated as follows:

[4712] 30 Composition Properties

[4713] Cone.,

[4714] Nr. Comp.

[4715] wt.-%

[4716] 1 CCD-3-2 10.0 T(N, I) = 89 °C

[4717] 2 APUQU-2-F 4.5 An (589 nm, 20°C): = 0.0971

[4718] 3 CC-3-V 28.35S|| (1 kHz, 20°C): = 9.0

[4719]

[4720] Foreignfiling_text_P24-240-SEC-WO01

[4721] - 335 -

[4722] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[4723] 5 CCP-3-3 5.4 As (1 kHz, 20°C): = 6.0

[4724] 6 CCP-V-1 10.8 Y1 (20°C): = 82 mPa s

[4725] 5

[4726] 7 CCP-V2-1 10.8 K1(20°C): = 15.4 pN

[4727] 8 CLGU-4-F 1.8 K3(20°C): = 16.9 pN

[4728] PP-1-2V1

[4729] 9 4.5

[4730] 10 PUQU-3-F 18.0

[4731]

[4732] Mixture Example S25 (stabilised with compound of Formula H-3-21)

[4733] A nematic LC mixture according to the invention is formulated as follows:

[4734] 15

[4735] Mixture M25 99.99 wt.-%

[4736] Compound of Formula H-3-21 100 ppm

[4737]

[4738] 20

[4739] Addition of 100 ppm of the compound of the Formula H-3-21 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M25, without affecting the remaining physical properties of the mixture.

[4740] 25

[4741] 35 Foreignfiling_text_P24-240-SEC-WO01

[4742] - 336 -

[4743] 5

[4744]

[4745] Example M26

[4746] 15

[4747] A nematic LC medium is formulated as follows:

[4748] Composition Properties

[4749] 20 Cone.,

[4750] Nr. Comp.

[4751] wt.-%

[4752] 1 CCD-3-2 10.0 T(N, I) = 87.5 °C

[4753] 2 CDUQU(1)-3-F 4.5 An (589 nm, 20°C): = 0.0936

[4754] 25 3 CC-3-V 28.35S|| (1 kHz, 20°C): = 8.9

[4755] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[4756] 5 CCP-3-3 5.4 As (1 kHz, 20°C): = 5.9

[4757] 6 CCP-V-1 10.8 Y1 (20°C): = 82 mPa s

[4758] 7 CCP-V2-1 10.8 K1(20°C): = 15.6 pN

[4759] 8 CLU-3-T 1.8 K3(20°C): = 17.1 pN

[4760] PP-1-2V1

[4761] 9 4.5

[4762] 35

[4763] 10 PUQU-3-F 18.0

[4764]

[4765] Foreignfiling_text_P24-240-SEC-WO01

[4766] - 337 -

[4767] CDUQU(1)-3-F

[4768]

[4769] 5

[4770] Mixture Example S26 (stabilised with compounds of Formulae H-3-11 and ST-1-3)

[4771] A nematic LC mixture according to the invention is formulated as follows:

[4772] Mixture M26 99.965 wt.-%

[4773] Compound of Formula H-3-11 50 ppm

[4774] Compound of Formula ST-1-3 300 ppm

[4775] 15

[4776]

[4777] Addition of compounds of Formulae H-3-11 and ST-1-3 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M26, without affecting the remaining physical properties of the mixture.

[4778] 20

[4779] Example M27

[4780] A nematic LC medium is formulated as follows:

[4781] 25

[4782] Composition Properties

[4783] Cone.,

[4784] Nr. Comp.

[4785] wt.-%

[4786] 1 CCD-3-2 10.0 T(N, I) = 87 °C

[4787] 2 APUQU-2-F 4.5 An (589 nm, 20°C): = 0.0957

[4788] 3 CC-3-V 28.35S|| (1 kHz, 20°C): = 8.9

[4789] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[4790] 35

[4791] 5 CCP-3-3 5.4 As (1 kHz, 20°C): = 5.9

[4792]

[4793] Foreignfiling_text_P24-240-SEC-WO01

[4794] - 338 -

[4795] 6 CCP-V-1 10.8 Y1 (20°C): = 80 mPa s 7 CCP-V2-1 10.8 K1(20°C): = 15.2 pN

[4796] 8 CLU-3-OT 1.8 K3(20°C): = 16.6 pN

[4797] 5

[4798] 9 PP-1-2V1 4.5

[4799] 10 PUQU-3-F 18.0

[4800]

[4801] Mixture Example S27 (stabilised with compounds of Formulae H-3-9 and ST-1-3)

[4802] A nematic LC mixture according to the invention is formulated as follows:

[4803] Mixture M27 99.955 wt.-%

[4804] 15

[4805] Compound of Formula H-3-9 50 ppm

[4806] Compound of Formula ST-1-3 400 ppm

[4807]

[4808] 20 Addition of compounds of Formulae H-3-9 and ST-1-3 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M27, without affecting the remaining physical properties of the mixture.

[4809] Example M28

[4810] 25

[4811] A nematic LC medium is formulated as follows:

[4812] Composition Properties

[4813] Cone.,

[4814] Nr. Comp.

[4815] wt.-%

[4816] 1 CCD-3-2 10.0 T(N, I) = 92 °C

[4817] 2 APUQU-2-F 4.5 An (589 nm, 20°C): = 0.1040

[4818] 35

[4819] 3 CC-3-V 28.35 ε||(1 kHz, 20°C): = 8.7

[4820]

[4821] Foreignfiling_text_P24-240-SEC-WO01

[4822] - 339 -

[4823] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[4824] 5 CPP-3-2V1 5.4 Δε (1 kHz, 20°C): = 5.7

[4825] 6 CCP-V-1 10.8 Y1 (20°C): = 88 mPa s 5

[4826] 7 CCP-V2-1 10.8 K1(20°C): = 16.0 pN

[4827] 8 CPGP-5-2 1.8 K3(20°C): = 17.8 pN

[4828] 9 PP-1-2V1 4.5

[4829] 10 PUQU-3-F 18.0

[4830]

[4831] Mixture Example S28 (stabilised with compounds of Formulae H-3-3 and ST-1-3)

[4832] A nematic LC mixture according to the invention is formulated as follows:

[4833] 15

[4834] Mixture M28 99.91 wt.-%

[4835] Compound of Formula H-3-3 700 ppm

[4836] 20

[4837] Compound of Formula ST-1-3 200 ppm

[4838]

[4839] Addition of compounds of Formulae H-3-3 and ST-1-3 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M28, without 25 affecting the remaining physical properties of the mixture.

[4840] Example M29

[4841] A nematic LC medium is formulated as follows:

[4842] Composition Properties

[4843] Cone.,

[4844] Nr. Comp.

[4845] wt.-%

[4846] 35

[4847] 1 CCD-3-2 10.0 T(N, I) = 89.5 °C

[4848]

[4849] Foreignfiling_text_P24-240-SEC-WO01

[4850] - 340 -

[4851] 2 DGUQU-(c5)-F 4.5 An (589 nm, 20°C): = 0.0982

[4852] 3 CC-3-V 28.35S|| (1 kHz, 20°C): = 8.9

[4853] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[4854] 5

[4855] 5 CCP-3-3 5.4 As (1 kHz, 20°C): = 5.9

[4856] 6 CCP-V-1 10.8 Y1 (20°C): = 87 mPa s 7 CCP-V2-1 10.8 K1(20°C): = 15.3 pN

[4857] 10

[4858] 8 CPGP-5-2 1.8 K3(20°C): = 16.9 pN

[4859] 9 PP-1-2V1 4.5

[4860] 10 PUQU-3-F 18.0

[4861] 15

[4862] F F F

[4863] DGUQU-(c5)-F

[4864]

[4865] F F

[4866] 20

[4867] Mixture Example S29 (stabilised with compounds of Formulae H-3-2 and ST-1-3)

[4868] A nematic LC mixture according to the invention is formulated as follows:

[4869] Mixture M29 99.97 wt.-%

[4870] Compound of Formula H-3-2 100 ppm

[4871] Compound of Formula ST-1-3 200 ppm

[4872]

[4873] Addition of compounds of Formulae H-3-2 and ST-1-3 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M29, without affecting the remaining physical properties of the mixture.

[4874] 35 Foreignfiling_text_P24-240-SEC-WO01

[4875] - 341 -

[4876] Example M30

[4877] A nematic LC medium is formulated as follows:

[4878] 5 Composition Properties

[4879] Cone.,

[4880] Nr. Comp.

[4881] wt.-%

[4882] 1 CCD-3-2 10.0 T(N, I) = 89.5 °C

[4883] 2 DGUQU(1)-4-F 4.5 An (589 nm, 20°C): = 0.0979

[4884] 3 CC-3-V 28.35S|| (1 kHz, 20°C): = 9.1

[4885] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[4886] 15 5 CCP-3-3 5.4 As (1 kHz, 20°C): = 6.1

[4887] 6 CCP-V-1 10.8 Y1 (20°C): = 87 mPa s 7 CCP-V2-1 10.8 K1(20°C): = 15.5 pN

[4888] 8 CPGP-5-2 1.8 K3(20°C): = 17.1 pN

[4889] 20

[4890] PP-1-2V1

[4891] 9 4.5

[4892] 10 PUQU-3-F 18.0

[4893]

[4894] 25 DGUQU(1)-4-F

[4895]

[4896] Mixture Example S30 (stabilised with compounds of Formulae H-3-1 and ST-2-3)

[4897] A nematic LC mixture according to the invention is formulated as follows:

[4898] Mixture M30 99.88 wt.-%

[4899] 35

[4900] Compound of Formula H-3-1 800 ppm

[4901]

[4902] Foreignfiling_text_P24-240-SEC-WO01

[4903] - 342 -

[4904] Compound of Formula ST-2-3 400 ppm

[4905]

[4906] Addition of compounds of Formulae H-3-1 and ST-2-3 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M30, without 5

[4907] affecting the remaining physical properties of the mixture.

[4908] Example M31

[4909] A nematic LC medium is formulated as follows:

[4910] Composition Properties

[4911] Cone.,

[4912] Nr. Comp.

[4913] wt.-%

[4914] 15

[4915] 1 CCD-3-2 10.0 T(N, I) = 92.5 °C

[4916] 2 DLGU-(c5)-F 4.5 An (589 nm, 20°C): = 0.1000

[4917] 3 CC-3-V 28.35S|| (1 kHz, 20°C): = 8.4

[4918] 20

[4919] 4 CC-3-V1 5.85 s± (1 kHz, 20°C): = 3.0

[4920] 5 CCP-3-3 5.4 As (1 kHz, 20°C): = 5.4

[4921] 6 CCP-V-1 10.8 Y1 (20°C): = 90 mPa s 25 7 CCP-V2-1 10.8 K1(20°C): = 16.3 pN

[4922] 8 CPGP-5-2 1.8 K3(20°C): = 17.2 pN

[4923] 9 PP-1-2V1 4.5

[4924] 10 PUQU-3-F 18.0

[4925]

[4926] DLGU-(c5)-F 35 Foreignfiling_text_P24-240-SEC-WO01

[4927] - 343 -

[4928] Mixture Example S31 (stabilised with compounds of Formulae H-3-1 and ST-1-3)

[4929] A nematic LC mixture according to the invention is formulated as follows:

[4930] 5 Mixture M31 99.88 wt.-%

[4931] Compound of Formula H-3-1 800 ppm

[4932] Compound of Formula ST-1-3 400 ppm

[4933]

[4934] 10

[4935] Addition of compounds of Formulae H-3-1 and ST-1-3 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M31, without affecting the remaining physical properties of the mixture.

[4936] 15

[4937] Example M32

[4938] A nematic LC medium is formulated as follows:

[4939] 20 Composition Properties

[4940] Cone.,

[4941] Nr. Comp.

[4942] wt.-%

[4943] 1 CCD-3-2 10.0 T(N, I) = 92.5 °C

[4944] 25 2 DLGU(1)-3-F 4.5 An (589 nm, 20°C): = 0.0997

[4945] 3 CC-3-V 28.35 ε||(1 kHz, 20°C): = 8.7

[4946] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[4947] 30 5 CCP-3-3 5.4 Δε (1 kHz, 20°C): = 5.7

[4948] 6 CCP-V-1 10.8 Y1 (20°C): = 89 mPa s 7 CCP-V2-1 10.8 K1(20°C): = 16.2 pN

[4949] 8 CPGP-5-2 1.8 K3(20°C): = 17.4 pN

[4950] 35

[4951] 9 PP-1-2V1 4.5

[4952]

[4953] Foreignfiling_text_P24-240-SEC-WO01

[4954] - 344 -

[4955] 10 PUQU-3-F 18.0

[4956]

[4957] 5 DLGU(1)-3-F

[4958]

[4959] Mixture Example S32 (stabilised with compounds of Formulae H-3-6 and ST-1-3)

[4960] A nematic LC mixture according to the invention is formulated as follows:

[4961] Mixture M32 99.965 wt.-%

[4962] 15 Compound of Formula H-3-6 50 ppm

[4963] Compound of Formula ST-1-3 300 ppm

[4964]

[4965] Addition of compounds of Formulae H-3-6 and ST-1-3 significantly improves the 20 VHR100after UV exposure compared to the non-stabilized mixture M32, without affecting the remaining physical properties of the mixture.

[4966] Example M33

[4967] 25

[4968] A nematic LC medium is formulated as follows:

[4969] Composition Properties

[4970] Cone.,

[4971] Nr. Comp.

[4972] wt.-%

[4973] 1 CCD-3-2 10.0 T(N, I) = 93.5 °C

[4974] 2 DPGU-(c5)-F 4.5 An (589 nm, 20°C): = 0.1013

[4975] S|| (1 kHz, 20°C): = 8.5

[4976] 35 3 CC-3-V 28.35

[4977] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[4978]

[4979] Foreignfiling_text_P24-240-SEC-WO01

[4980] - 345 -

[4981] 5 CCP-3-3 5.4 As (1 kHz, 20°C): = 5.5

[4982] 6 CCP-V-1 10.8 Y1 (20°C): = 89 mPa s 7 CCP-V2-1 10.8 K1(20°C): = 16.2 pN

[4983] 5

[4984] 8 CPGP-5-2 1.8 K3(20°C): = 17.2 pN

[4985] 9 PP-1-2V1 4.5

[4986] 10 PUQU-3-F 18.0

[4987]

[4988] DPGU-(c5)-F

[4989]

[4990] 15

[4991] Mixture Example S33 (stabilised with compounds of Formulae H-3-4 and ST-2-3)

[4992] A nematic LC mixture according to the invention is formulated as follows:

[4993] 20

[4994] Mixture M33 99.972 wt.-%

[4995] Compound of Formula H-3-4 80 ppm

[4996] Compound of Formula ST-2-3 200 ppm

[4997] 25

[4998]

[4999] Addition of compounds of Formulae H-3-4 and ST-2-3 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M33, without affecting the remaining physical properties of the mixture.

[5000] Example M34

[5001] A nematic LC medium is formulated as follows:

[5002] 35

[5003] Composition Properties

[5004]

[5005] Foreignfiling_text_P24-240-SEC-WO01

[5006] - 346 -

[5007] Cone.,

[5008] Nr. Comp.

[5009] wt.-%

[5010] 1 CCD-3-2 10.0 T(N, I) = 94 °C

[5011] 2 DPGU(1)-4-F 4.5 An (589 nm, 20°C): = 0.1012

[5012] 5

[5013] 3 CC-3-V 28.35S|| (1 kHz, 20°C): = 8.8

[5014] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[5015] 5 CCP-3-3 5.4 As (1 kHz, 20°C): = 5.8

[5016] 6 CCP-V-1 10.8 Y1 (20°C): = 89 mPa s 7 CCP-V2-1 10.8 K1(20°C): = 16.3 pN

[5017] 8 CPGP-5-2 1.8 K3(20°C): = 17.5 pN

[5018] 15

[5019] 9 PP-1-2V1 4.5

[5020] 10 PUQU-3-F 18.0

[5021]

[5022] 20 DPGU(1)-4-F

[5023]

[5024] Mixture Example S34 (stabilised with compounds of Formulae H-3-7 and ST-1-3) 25

[5025] A nematic LC mixture according to the invention is formulated as follows:

[5026] Mixture M34 99.91 wt.-%

[5027] Compound of Formula H-3-7 500 ppm

[5028] Compound of Formula ST-1-3 400 ppm

[5029]

[5030] 35 Foreignfiling_text_P24-240-SEC-WO01

[5031] - 347 -

[5032] Addition of compounds of Formulae H-3-7 and ST-1-3 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M34, without affecting the remaining physical properties of the mixture.

[5033] 5 Example M35

[5034] A nematic LC medium is formulated as follows:

[5035] Composition Properties

[5036] Cone.,

[5037] Nr. Comp.

[5038] wt.-%

[5039] 1 CCD-3-2 10.0 T(N, I) = 86 °C

[5040] 2 DUQU-(c5)-F 4.5 An (589 nm, 20°C): = 0.0952

[5041] 15

[5042] 3 CC-3-V 28.35S|| (1 kHz, 20°C): = 8.5

[5043] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[5044] 5 CCP-3-3 5.4 As (1 kHz, 20°C): = 5.5

[5045] 20

[5046] 6 CCP-V-1 10.8 Y1 (20°C): = 81 mPa s 7 CCP-V2-1 10.8 K1(20°C): = 15.1 pN

[5047] 8 CPGP-5-2 1.8 K3(20°C): = 16.5 pN

[5048] 25

[5049] 9 PP-1-2V1 4.5

[5050] 10 PUQU-3-F 18.0

[5051]

[5052] DUQU-(c5)-F

[5053]

[5054] Mixture Example S35 (stabilised with compounds of Formulae H-3-7 and ST-2-3) 35

[5055] A nematic LC mixture according to the invention is formulated as follows: Foreignfiling_text_P24-240-SEC-WO01

[5056] - 348 -

[5057] Mixture M35 99.91 wt.-%

[5058] Compound of Formula H-3-7 500 ppm

[5059] 5

[5060] Compound of Formula ST-2-3 400 ppm

[5061]

[5062] Addition of compounds of Formulae H-3-7 and ST-2-3 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M35, without affecting the remaining physical properties of the mixture.

[5063] Example M36

[5064] A nematic LC medium is formulated as follows:

[5065] 15

[5066] Composition Properties

[5067] Cone.,

[5068] Nr. Comp.

[5069] wt.-%

[5070] 20

[5071] 1 CCD-3-2 10.0 T(N, I) = 87.5 °C

[5072] 2 APUQU-2-F 4.5 An (589 nm, 20°C): = 0.1085

[5073] 3 CC-3-V 28.35S|| (1 kHz, 20°C): = 8.9

[5074] 25 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[5075] 5 PUS-(c5)-2 5.4 As (1 kHz, 20°C): = 5.9

[5076] 6 CCP-V-1 10.8 Y1 (20°C): = 82 mPa s 7 CCP-V2-1 10.8 K1(20°C): = 15.3 pN

[5077] 8 CPGP-5-2 1.8 K3(20°C): = 16.1 pN

[5078] 9 PP-1-2V1 4.5

[5079] 10 PUQU-3-F 18.0

[5080] 35

[5081]

[5082] Foreignfiling_text_P24-240-SEC-WO01

[5083] - 349 -

[5084] PUS-(c5)-2

[5085]

[5086] 5

[5087] Mixture Example S36 (stabilised with compounds of Formulae H-3-11 and ST-1-3)

[5088] A nematic LC mixture according to the invention is formulated as follows:

[5089] Mixture M36 99.965 wt.-%

[5090] Compound of Formula H-3-11 50 ppm

[5091] Compound of Formula ST-1-3 300 ppm

[5092] 15

[5093]

[5094] Addition of compounds of Formulae H-3-11 and ST-1-3 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M36, without affecting the remaining physical properties of the mixture.

[5095] 20

[5096] Example M37

[5097] A nematic LC medium is formulated as follows:

[5098] 25 Composition Properties

[5099] Cone.,

[5100] Nr. Comp.

[5101] wt.-%

[5102] 1 CCD-3-2 10.0 T(N, I) = 86.5 °C

[5103] 2 APUQU-2-F 4.5 An (589 nm, 20°C): = 0.1074

[5104] 3 CC-3-V 28.35S|| (1 kHz, 20°C): = 8.8

[5105] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[5106] 35 5 PUS-3-(c5) 5.4 As (1 kHz, 20°C): = 5.8

[5107]

[5108] Foreignfiling_text_P24-240-SEC-WO01

[5109] - 350 -

[5110] 6 CCP-V-1 10.8 Y1 (20°C): = 82 mPa s 7 CCP-V2-1 10.8 K1(20°C): = 15.2 pN

[5111] 8 CPGP-5-2 1.8 K3(20°C): = 15.6 pN

[5112] 5

[5113] 9 PP-1-2V1 4.5

[5114] 10 PUQU-3-F 18.0

[5115]

[5116] PUS-3-(c5)

[5117]

[5118] 15

[5119] Mixture Example S37 (stabilised with compounds of Formulae H-3-8 and ST-1-3)

[5120] A nematic LC mixture according to the invention is formulated as follows:

[5121] 20 Mixture M37 99.91 wt.-%

[5122] Compound of Formula H-3-8 700 ppm

[5123] Compound of Formula ST-1-3 200 ppm

[5124]

[5125] 25

[5126] Addition of compounds of Formulae H-3-8 and ST-1-3 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M37, without affecting the remaining physical properties of the mixture.

[5127] Example M38

[5128] A nematic LC medium is formulated as follows:

[5129] Composition

[5130] 35 Properties

[5131]

[5132] Foreignfiling_text_P24-240-SEC-WO01

[5133] - 351 -

[5134] Cone.,

[5135] Nr. Comp.

[5136] wt.-%

[5137] 1 CCD-3-2 10.0 T(N, I) = 85 °C

[5138] 2 APUQU-2-F 4.5 Δn (589 nm, 20°C): = 0.1058

[5139] 5

[5140] 3 CC-3-V 28.35S|| (1 kHz, 20°C): = 8.8

[5141] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[5142] 5 PUS-3-1 (c5) 5.4 As (1 kHz, 20°C): = 5.8

[5143] 6 CCP-V-1 10.8 Y1 (20°C): = 81 mPa s 7 CCP-V2-1 10.8 K1(20°C): = 14.7 pN

[5144] 8 CPGP-5-2 1.8 K3(20°C): = 15.1 pN

[5145] 15

[5146] 9 PP-1-2V1 4.5

[5147] 10 PUQU-3-F 18.0

[5148]

[5149] 20

[5150] PUS-3-1 (c5)

[5151]

[5152] 25 Mixture Example S38 (stabilised with compounds of Formulae H-3-12 and ST-1-3)

[5153] A nematic LC mixture according to the invention is formulated as follows:

[5154] Mixture M38 99.935 wt.-%

[5155] Compound of Formula H-3-12 50 ppm

[5156] Compound of Formula ST-1-3 400 ppm

[5157]

[5158] 35 Foreignfiling_text_P24-240-SEC-WO01

[5159] - 352 -

[5160] Addition of compounds of Formulae H-3-12 and ST-1-3 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M38, without affecting the remaining physical properties of the mixture.

[5161] 5 Example M39

[5162] A nematic LC medium is formulated as follows:

[5163] Composition Properties

[5164] Cone.,

[5165] Nr. Comp.

[5166] wt.-%

[5167] 1 CCD-3-2 10.0 T(N, I) = 86 °C

[5168] 2 APUQU-2-F 4.5 Δn (589 nm, 20°C): = 0.1063

[5169] 15

[5170] 3 CC-3-V 28.35 ε||(1 kHz, 20°C): = 8.7

[5171] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[5172] 5 PUS-3-2(c5) 5.4 Δε (1 kHz, 20°C): = 5.7

[5173] 20

[5174] 6 CCP-V-1 10.8 Y1 (20°C): = 82 mPa s 7 CCP-V2-1 10.8 K1(20°C): = 14.9 pN

[5175] 8 CPGP-5-2 1.8 K3(20°C): = 15.9 pN

[5176] 25

[5177] 9 PP-1-2V1 4.5 V0(20°C): = 1.75 V

[5178] 10 PUQU-3-F 18.0

[5179]

[5180]

[5181] 35

[5182] Mixture Example S39 (stabilised with compounds of Formulae H-3-14 and ST-1-3) Foreignfiling_text_P24-240-SEC-WO01

[5183] - 353 -

[5184] A nematic LC mixture according to the invention is formulated as follows:

[5185] Mixture M39 99.975 wt.-%

[5186] 5 Compound of Formula H-3-14 50 ppm

[5187] Compound of Formula ST-1-3 200 ppm

[5188]

[5189] Addition of compounds of Formulae H-3-14 and ST-1-3 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M39, without affecting the remaining physical properties of the mixture.

[5190] Example M40

[5191] 15

[5192] A nematic LC medium is formulated as follows:

[5193] Composition Properties

[5194] Cone.,

[5195] 20 Nr. Comp.

[5196] wt.-%

[5197] 1 CCD-3-2 10.0 T(N, I) = 86 °C

[5198] 2 APUQU-2-F 4.5 An (589 nm, 20°C): = 0.1074

[5199] 3 CC-3-V 28.35 ε||(1 kHz, 20°C): = 8.7

[5200] 25

[5201] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[5202] 5 PUS-3-O(c5) 5.4 Δε (1 kHz, 20°C): = 5.7

[5203] 6 CCP-V-1 10.8 Y1 (20°C): = 82 mPa s 7 CCP-V2-1 10.8 K1(20°C): = 14.9 pN

[5204] 8 CPGP-5-2 1.8 K3(20°C): = 15.5 pN

[5205] 9 PP-1-2V1 4.5

[5206] 35

[5207] 10 PUQU-3-F 18.0

[5208]

[5209] Foreignfiling_text_P24-240-SEC-WO01

[5210] - 354 -

[5211] PUS-3-O(c5)

[5212]

[5213] 5

[5214] Mixture Example S40 (stabilised with compounds of Formulae H-3-15 and ST-1-3)

[5215] A nematic LC mixture according to the invention is formulated as follows:

[5216] Mixture M40 99.955 wt.-%

[5217] Compound of Formula H-3-15 50 ppm

[5218] 15 Compound of Formula ST-1-3 400 ppm

[5219]

[5220] Addition of compounds of Formulae H-3-15 and ST-1-3 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M40, without affecting the remaining physical properties of the mixture.

[5221] 20

[5222] Example M41

[5223] A nematic LC medium is formulated as follows:

[5224] 25

[5225] Composition Properties

[5226] Cone.,

[5227] Nr. Comp.

[5228] wt.-%

[5229] 1 CCD-3-2 10.0 T(N, I) = 87 °C

[5230] 2 APUQU-2-F 4.5 An (589 nm, 20°C): = 0.1074

[5231] 3 CC-3-V 28.35 ε||(1 kHz, 20°C): = 8.7

[5232] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[5233] 35

[5234] 5 PUS-3-01 (c5) 5.4 Δε (1 kHz, 20°C): = 5.7

[5235]

[5236] Foreignfiling_text_P24-240-SEC-WO01

[5237] - 355 -

[5238] 6 CCP-V-1 10.8 Y1 (20°C): = 84 mPa s 7 CCP-V2-1 10.8 K1(20°C): = 14.9 pN

[5239] 8 CPGP-5-2 1.8 K3(20°C): = 16.1 pN

[5240] 5

[5241] 9 PP-1-2V1 4.5

[5242] 10 PUQU-3-F 18.0

[5243]

[5244] PUS-3-01 (c5)

[5245]

[5246] 15

[5247] Mixture Example S41 (stabilised with compounds of Formulae H-3-2 and ST-2-3)

[5248] A nematic LC mixture according to the invention is formulated as follows:

[5249] 20 Mixture M41 99.97 wt.-%

[5250] Compound of Formula H-3-2 100 ppm

[5251] Compound of Formula ST-2-3 200 ppm

[5252]

[5253] 25

[5254] Addition of compounds of Formulae H-3-2 and ST-2-3 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M41, without affecting the remaining physical properties of the mixture.

[5255] Example M42

[5256] A nematic LC medium is formulated as follows:

[5257] Composition

[5258] 35 Properties

[5259] Nr.

[5260]

[5261] Foreignfiling_text_P24-240-SEC-WO01

[5262] - 356 -

[5263] 1 CCD-3-2 10.0 T(N, I) = 85 °C

[5264] 2 APUQU-2-F 4.5 Δn (589 nm, 20°C): = 0.1058

[5265] 3 CC-3-V 28.35S|| (1 kHz, 20°C): = 9.6

[5266] 5

[5267] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[5268] 5 PUS-3-T 5.4 As (1 kHz, 20°C): = 6.6

[5269] 6 CCP-V-1 10.8 Y1 (20°C): = 80 mPa s 7 CCP-V2-1 10.8 K1(20°C): = 15.1 pN

[5270] 8 CPGP-5-2 1.8 K3(20°C): = 15.9 pN

[5271] 9 PP-1-2V1 4.5

[5272] 10 PUQU-3-F 18.0

[5273] 15

[5274]

[5275] Mixture Example S42 (stabilised with compounds of Formulae H-3-17 and ST-1-3)

[5276] A nematic LC mixture according to the invention is formulated as follows:

[5277] 20

[5278] Mixture M42 99.955 wt.-%

[5279] Compound of Formula H-3-17 50 ppm

[5280] 25 Compound of Formula ST-1-3 400 ppm

[5281]

[5282] Addition of compounds of Formulae H-3-17 and ST-1-3 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M42, without affecting the remaining physical properties of the mixture.

[5283] Example M43

[5284] A nematic LC medium is formulated as follows:

[5285] 35

[5286] Composition Properties

[5287]

[5288] Foreignfiling_text_P24-240-SEC-WO01

[5289] - 357 -

[5290] Nr.

[5291] 1 CCD-3-2 10.0 T(N, I) = 90.5 °C

[5292] 2 APUQU(1)-3-F 4.5 Δn (589 nm, 20°C): = 0.0986

[5293] 5

[5294] 3 CC-3-V 28.35 ε||(1 kHz, 20°C): = 8.7

[5295] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[5296] 5 CCP-3-3 5.4 Δε (1 kHz, 20°C): = 5.7

[5297] 6 CCP-V-1 10.8 Y1 (20°C): = 86 mPa s 7 CCP-V2-1 10.8 K1(20°C): = 15.7 pN

[5298] 8 CPGP-5-2 1.8 K3(20°C): = 17.2 pN

[5299] 9 PP-1-2V1 4.5

[5300] 15

[5301] 10 PUQU-3-F 18.0

[5302]

[5303] 20

[5304]

[5305] Mixture Example S43 (stabilised with compounds of Formulae H-3-16 and ST-1-3) 25

[5306] A nematic LC mixture according to the invention is formulated as follows:

[5307] Mixture M43 99.955 wt.-%

[5308] Compound of Formula H-3-16 50 ppm

[5309] Compound of Formula ST-1-3 400 ppm

[5310]

[5311] Addition of compounds of Formulae H-3-16 and ST-1-3 significantly improves the 35 VHR100after UV exposure compared to the non-stabilized mixture M43, without affecting the remaining physical properties of the mixture. Foreignfiling_text_P24-240-SEC-WO01

[5312] - 358 -

[5313] Example M44

[5314] A nematic LC medium is formulated as follows:

[5315] 5

[5316] Composition Properties

[5317] Nr.

[5318] 1 CCD-3-2 10.0 T(N, I) = 90 °C

[5319] 2 PGUQU-(c5)-F 4.5 An (589 nm, 20°C): = 0.1013

[5320] 3 CC-3-V 28.35 ε||(1 kHz, 20°C): = 8.6

[5321] 4 CC-3-V1 5.85 s± (1 kHz, 20°C): = 3.0

[5322] 15 5 CCP-3-3 5.4 Δε (1 kHz, 20°C): = 5.6

[5323] 6 CCP-V-1 10.8 Y1 (20°C): = 86 mPa s 7 CCP-V2-1 10.8 K1(20°C): = 15.5 pN

[5324] 20 8 CPGP-5-2 1.8 K3(20°C): = 17.1 pN

[5325] 9 PP-1-2V1 4.5

[5326] 10 PUQU-3-F 18.0

[5327]

[5328] 25

[5329] PGUQU-(c5)-F

[5330]

[5331] Mixture Example S44 (stabilised with compounds of Formulae H-3-19 and ST-1-3)

[5332] A nematic LC mixture according to the invention is formulated as follows:

[5333] 35 Mixture M44 99.955 wt.-%

[5334]

[5335] Foreignfiling_text_P24-240-SEC-WO01

[5336] - 359 -

[5337] Compound of Formula H-3-19 50 ppm

[5338] Compound of Formula ST-1-3 400 ppm

[5339]

[5340] Addition of compounds of Formulae H-3-19 and ST-1-3 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M44, without affecting the remaining physical properties of the mixture.

[5341] Example M45

[5342] A nematic LC medium is formulated as follows:

[5343] Composition Properties

[5344] Nr.

[5345] 1 CCD-3-2 10.0 T(N, I) = 90.5 °C

[5346] 2 PGUQU(1)-3-F 4.5 An (589 nm, 20°C): = 0.1013

[5347] 3 CC-3-V 28.35 ε||(1 kHz, 20°C): = 8.7

[5348] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[5349] 5 PUS-3-1 (c5) 5.4 Δε (1 kHz, 20°C): = 5.7

[5350] 6 CCP-V-1 10.8 Y1 (20°C): = 87 mPa s 7 CCP-V2-1 10.8 K>| (20°C): = 15.6 pN

[5351] 8 CPGP-5-2 1.8 K3(20°C): = 17.4 pN

[5352] 9 PP-1-2V1 4.5

[5353] 10 PUQU-3-F 18.0

[5354]

[5355] Foreignfiling_text_P24-240-SEC-WO01

[5356] - 360 -

[5357] Mixture Example S45 (stabilised with compounds of Formulae H-3-18 and ST-2-3)

[5358] A nematic LC mixture according to the invention is formulated as follows:

[5359] 5

[5360] Mixture M45 99.955 wt.-%

[5361] Compound of Formula H-3-18 50 ppm

[5362] Compound of Formula ST-2-3 400 ppm

[5363]

[5364] Addition of compounds of Formulae H-3-18 and ST-2-3 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M45, without affecting the remaining physical properties of the mixture.

[5365] 15

[5366] Example M46

[5367] A nematic LC medium is formulated as follows:

[5368] 20

[5369] Composition Properties

[5370] Nr.

[5371] 1 CCD-3-2 10.0 T(N, I) = 88.5 °C

[5372] 25

[5373] 2 APUQU-2-F 4.5 Δn (589 nm, 20°C): = 0.0973

[5374] 3 CC-3-V 28.35 ε||(1 kHz, 20°C): = 8.7

[5375] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[5376] 5 CCP-3-3 5.4 Δε (1 kHz, 20°C): = 5.7

[5377] 6 CCP-V-1 10.8 Y1 (20°C): = 80 mPa s 7 CCP-V2-1 10.8 K1(20°C): = 15.3 pN

[5378] 35 8 CPGP-5-2 1.8 K3(20°C): = 16.5 pN

[5379] 9 PP-1-3 4.5

[5380]

[5381] Foreignfiling_text_P24-240-SEC-WO01

[5382] - 361 -

[5383] 10 PUQU-3-F 18.0

[5384]

[5385] Mixture Example S46 (stabilised with compounds of Formulae H-3-20 and ST-1-3)

[5386] 5 A nematic LC mixture according to the invention is formulated as follows:

[5387] Mixture M46 99.975 wt.-%

[5388] Compound of Formula H-3-20 50 ppm

[5389] Compound of Formula ST-1-3 200 ppm

[5390]

[5391] Addition of compounds of Formulae H-3-20 and ST-1-3 significantly improves the 15 VHR100after UV exposure compared to the non-stabilized mixture M46, without affecting the remaining physical properties of the mixture.

[5392] Example M47

[5393] 20 A nematic LC medium is formulated as follows:

[5394] Composition Properties

[5395] Nr.

[5396] 25

[5397] 1 CCD-3-2 10.0 T(N, I) = 92.5 °C

[5398] 2 APUQU-2-F 4.5 An (589 nm, 20°C): = 0.1002

[5399] 3 CC-3-V 28.35 ε||(1 kHz, 20°C): = 8.7

[5400] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[5401] 5 CCP-3-3 5.4 Δε (1 kHz, 20°C): = 5.7

[5402] 6 CCP-V-1 10.8 Y1 (20°C): = 87 mPa s

[5403] 35 7 CCP-V2-1 10.8 K1(20°C): = 15.8 pN

[5404] 8 CPGP-5-2 1.8 K3(20°C): = 17.4 pN

[5405]

[5406] Foreignfiling_text_P24-240-SEC-WO01

[5407] - 362 -

[5408] 9 PP-1-2V1 4.5

[5409] 10 PUQU-3-F 17.0

[5410] 11 PPGU-(c5)-F 1.0

[5411]

[5412] 5

[5413] PPGU-(c5)-F

[5414]

[5415] Mixture Example S47 (stabilised with compounds of Formulae H-3-20 and ST-2-3)

[5416] A nematic LC mixture according to the invention is formulated as follows:

[5417] 15

[5418] Mixture M47 99.975 wt.-%

[5419] Compound of Formula H-3-20 50 ppm

[5420] Compound of Formula ST-2-3 200 ppm

[5421] 20

[5422]

[5423] Addition of compounds of Formulae H-3-20 and ST-2-3 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M47, without affecting the remaining physical properties of the mixture.

[5424] 25

[5425] Example M48

[5426] A nematic LC medium is formulated as follows:

[5427] Composition Properties

[5428] Nr.

[5429] 1 CCD-3-2 10.0 T(N, I) = 93 °C

[5430] 35 2 APUQU-2-F 4.5 An (589 nm, 20°C): = 0.1012

[5431] 3 CC-3-V 28.35S|| (1 kHz, 20°C): = 8.5

[5432]

[5433] Foreignfiling_text_P24-240-SEC-WO01

[5434] - 363 -

[5435] 4 CC-3-V1 5.85 ε⊥(1 kHz, 20°C): = 3.0

[5436] 5 CCP-3-3 5.4 As (1 kHz, 20°C): = 5.5

[5437] 6 CCP-V-1 10.8 Y1 (20°C): = 88 mPa s 5

[5438] 7 CCP-V2-1 10.8 K1(20°C): = 15.8 pN

[5439] 8 CPGP-5-2 1.8 K3(20°C): = 17.4 pN

[5440] 9 PP-1-2V1 4.5 V0(20°C): = 1.75 V

[5441] 10 PUQU-3-F 17.0

[5442] 11 PGP-5-Np 1.0

[5443]

[5444] 15

[5445] PGP-5-Np

[5446] Mixture Example S48 (stabilised with compounds of Formulae H-3-1 and ST-2-3) 20

[5447] A nematic LC mixture according to the invention is formulated as follows:

[5448] Mixture M48 99.89 wt.-%

[5449] 25

[5450] Compound of Formula H-3-1 800 ppm

[5451] Compound of Formula ST-2-3 300 ppm

[5452]

[5453] Addition of compounds of Formulae H-3-1 and ST-2-3 significantly improves the VHR100after UV exposure compared to the non-stabilized mixture M48, without affecting the remaining physical properties of the mixture.

[5454] 35

Claims

1. Foreignfiling_text_P24-240-SEC-WO012.- 364 -3.Patent Claims1. Liquid-crystalline medium having positive dielectric anisotropy, comprising one 5 or more compounds of Formula I6. 8.in which9.R11 and R12 identically or differently, denote H, straight chain alkyl or alkoxy having 1 to 15 C atoms, straight chain alkenyl or alkenyloxy having 2 to 15 C 15 atoms or branched alkyl, alkoxy, alkenyl, alkenyloxy each having 3 to 15 C atoms, where one or more CH2 groups in these radicals may each10.be replaced, independently of one another, by11. 13.2014.

17.

18. -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked directly 2519.to one another, and in which one or more H atoms may be replaced by halogen,20.n denotes 0, 1, or 2,22.

23. group selected from the following formulae:24.3526.

27. Foreignfiling_text_P24-240-SEC-WO0128.- 365 -29.

531.

32. 1533.Z11and Z12each independently denote a single bond, -CH2CH2-, -CH2-,34.-OCH2-, -CH2O-, -O-, -CO-O-, -O-CO-, -CF2O-, -OCF2-, -CH=CH-, -CF=CF-, or-C=C-,35.2036.— \A11 / —37.in a case where n is 2, the two \ — f may be the same as or different from each other, and in a case where n is 2, the two Z11may be the same as or different from each other.38.

252. Medium according to Claim 1, characterised in that the one or more compounds of Formula I are selected from the group consisting of the following compounds:40.3542.

43. Foreignfiling_text_P24-240-SEC-WO0144.- 366 - 5 15 2045.

46. Foreignfiling_text_P24-240-SEC-WO0147.- 367 -49. 51.in which52.553.R11 and each, independently of one another, denote an alkyl or an alkoxy group having 1 to 6 C atoms or an alkenyl or an alkenyloxy group having 2 to 6 C atoms in which one or more CH2groups are optionally substituted by -C=C-, -CF2O-, -OCF2-, -CH=CH-,54.

57.

58. -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be substituted by a halogen atom.59.

153. Medium according to Claim 1 or 2, characterized in that it further comprises one or more compounds selected from the group consisting of the following formulae:61.2063.

64. 2566. 68.in which the individual substituents have the following meanings: Foreignfiling_text_P24-240-SEC-WO0169.- 368 -70.571.1572. 74.2075. 77.in which78.25 RO has the meanings given in Claim 179.

80. for and R12;81.U to L⁸ each, independently of one another, denote H, F or Cl;82.yO denotes a H atom, an alkyl group having 1 to 3 C atoms or an alkenyl group having 2 to 3 C atoms in which one or more non-adjacent CH2 groups are optionally substituted by -C=C-, -CF2O-,83.-OCF2-, -CH=CH-, -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, preferably H or CH3;84.XO denotes a halogen atom, -CN, -SCN, -NCS or an alkyl or an alkoxy group having 1 to 6 C atoms or an alkenyl or an alkenyloxy group 3585.having 2 to 6 C atoms in which one or more H atoms has been substituted by a halogen atom. Foreignfiling_text_P24-240-SEC-WO0186.- 369 -4. Medium according to Claim 3, wherein the one or more compounds of Formula II are selected from the following subformulae:88.

590. 92.1593.2094. 96.2598.

99. Foreignfiling_text_P24-240-SEC-WO01100.- 370 -101.II-6102.5103.II-7105.

106. 15107.20109. 111.in which R^ and112.

113. have the meanings given in Formula II.114.

255. Medium according to Claim 3, wherein the one or more compounds of Formula III are selected from the following subformulae:116.111-1118. 120.35 Foreignfiling_text_P24-240-SEC-WO01121.5123.

124. 15125.20126. 128.25129.35130.

131. Foreignfiling_text_P24-240-SEC-WO01132.- 372 -133.5134.F F135.III-10 F F136.15137.III-12 20138.25 III-13139.III-14140.

141. 35 Foreignfiling_text_P24-240-SEC-WO01142.- 373 -143.5144.15 20145.III-19 R° o III-20 30 R° X°146.

147. Foreignfiling_text_P24-240-SEC-WO01148.- 374 -149.111-21150.5151.III-22153.

154. in which R^ and155.

156. have the meanings given in Formula III.

6. Medium according to one or more of Claims 1 to 5, characterised in that it additionally comprises one or more compounds selected from the group 15 consisting of the following formulae:158.20160. 162.25164. 166.35 Foreignfiling_text_P24-240-SEC-WO01167.- 375 -168.VII169.5170.VIII172. 174.in which RO, X^,, L175.

176. and have the meanings given in Claim 3;177.l_3 and l_4 each, independently of one another, have the meanings given for U; Z° denotes -C2H4-, -(CH2)4-, -CH=CH-, -CF=CF-, -C2F4-, -CH2CF2-, 15 -CF2CH2-, -CH2O-, -OCH2-, -COO-, -CF2O-, or-OCF2-, in the Formulae V and VI also a single bond; and178.s denotes 0 or 1.

7. Medium according to one or more of Claims 1 to 6, characterised in that it 20180.comprises one or more compounds selected from the group consisting of the following formulae181.XVIII182.25183.XIX185. 187.35 Foreignfiling_text_P24-240-SEC-WO01188.- 376 -189.5190.15191. 193.20194. 196.in which RO,197.

198. to l_4, X^ and have the meanings given in Claim 3 for RO, 25 U to L®,X0 and Y^, respectively.

8. Medium according to one or more of Claims 1 to 7, characterized in that it comprises one or more compounds selected from the group consisting of the following formulae:200.XXVII201.35202.

203. Foreignfiling_text_P24-240-SEC-WO01204.- 377 -205.XXVIII206.5207.15208. 210.20211.

214. 216.and217.

218. R1, X^ and have the meanings given in Claim 3 for RO,219.

220. and X^, 25221.respectively.

9. Medium according to one or more of Claims 1 to 8, characterized in that it comprises one or more compounds selected from the group consisting of the following formulae:223.XXXa225.

226. 35 Foreignfiling_text_P24-240-SEC-WO01227.- 378 -228.in which R1229.

230. and have the meanings given in Claim 3 for R^ and Y^, respectively.231.5 10. Liquid-crystalline medium according to one or more of Claims 1 to 9,232.characterised in that it comprises one or more compounds selected from the group of Formulae N1 and N2:

234.

235. 15236.in which237.R41 and R42 each, independently of one another, denote an alkyl or an alkoxy group having 1 to 12 C atoms or an alkenyl or an alkenyloxy group having 2 to 12 C atoms in which one or more non-adjacent CH2 20238.groups are optionally substituted by -C=C-, -CF2O-, -OCF2-,239.-240.

241. CH=CH-,, -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked 25 directly to one another, and in which one or more H atoms may be replaced by a halogen atom or a cycloalkyl or a cycloalkoxy group having 3 to 12 C atoms, in which one or more H atoms may be replaced by a halogen atom,242.preferably R^1 denotes alkyl and R^2 denotes alkyl or alkoxy or R^1 denotes alkenyl and R⁴² denotes alkyl, wherein one -CH2- group may be replaced by cyclopropylene, 1,3-cyclobutylene, 1,3-cyclopentylene, 1,3-cyclopentenylene, preferably by cyclopropylene or 1,3- cyclopentylene,243.35 Foreignfiling_text_P24-240-SEC-WO01244.- 379 -246.

247. and248.independently of one another and, if249.5 occurs twice,251. 253.also these independently of one another, denote254.15255.20256. 258.25259.denotes or denote,261.

262. 35 Foreignfiling_text_P24-240-SEC-WO01263.- 380 -264.Z^1 and z42 independently of one another and, if Z^1 occurs twice, also these independently of one another, denote -CH2CH2-, -COO-, trans- CH=CH-, trans-CF=CF-, -CH2O-, -CF2O-, -C=C- or a single bond, preferably one or more thereof denotes / denote a single bond, and 5265.p denotes 0, 1 or 2, preferably 0 or 1, and266.R51 and R52 independently of one another, have one of the meanings given for R41 and R^2 and preferably denote alkyl having 1 to 12 C atoms, preferably n-alkyl, particularly preferably n-alkyl having 1 to 6 C atoms, alkoxy having 1 to 6 C atoms, preferably n-alkoxy, particularly preferably n-alkoxy having 2 to 6 C atoms, alkoxyalkyl, alkenyl or alkenyloxy having 2 to 6 C atoms, preferably having 2 to 4 C atoms, preferably alkenyloxy, wherein one -CH2- group may be replaced by 15267.cyclopropylene, 1,3-cyclobutylene, 1,3-cyclopentylene, 1,3-cyclo- pentenylene, preferably by cyclopropylene or 1,3-cyclopentylene,268.20269. 271.if present, each, independently of one another, denote272.25274. 276.35 or277.preferably Foreignfiling_text_P24-240-SEC-WO01278.- 381 -279.5280.preferably282.

283. and, if present,284.15286.

288. 290.preferably denotes291.Z51to Z53each, independently of one another, denote -CH2-CH2-, -CH2-O-, - 20 CH=CH-, -C=C-, -COO- or a single bond, preferably -CH2-CH2-, - CH2-O- or a single bond and particularly preferably a single bond, i and j each, independently of one another, denote 0 or 1,292.(i + j) preferably denotes 0, 1 or 2, more preferably 0 or 1 and, most 25293.preferably, 1, and294.wherein the one or more, preferably one, of the aromatic rings present may optionally be substituted by an alkyl group, preferably by methyl.

11. Medium according to Claim 10, characterized in that the compound of Formula N1 is represented by one of the following formulae:296.35297.

298. Foreignfiling_text_P24-240-SEC-WO01299.5300.15302. 304.20305. 307.25308.35309.

310. Foreignfiling_text_P24-240-SEC-WO01311.- 383 -312.alkenyl alkenyl Z10313.5315. 317.in which the individual substituents have the following meanings:318."alkyl" and "alkyl*" each, independently from one another, denote an alkyl group having 1 to 6 C atoms;319."alkenyl" and "alkenyl*" each, independently of one another, denote alkenyl group having 2 to 6 C atoms.

12. Medium according to one or more of Claims 1 to 11, characterised in that it 15321.comprises from 10 % to 60 % by weight of compound of Formula Z1-1:322.Z1-1324. 326.2013. Medium according to Claim 10, characterised in that the compound of Formula N2 is represented by one of the following formulae:328.25329.XII330.XIV331.XV333. 335.35 Foreignfiling_text_P24-240-SEC-WO01336.- 384 -337.R1R2XVI338.5339.XVI I a340.XVIIb341.XVI I c342.

343. 15344.XXXII345.20346. 348.in which349.R1and R2each, independently of one another, denote n-alkyl, alkoxy, oxaalkyl, fluoroalkyl or alkenyl, each having up to 6 C atoms, 25350.and351.L1and L2denotes, H, F or Cl.352.Liquid-crystalline medium of one or more of Claims 1 to 13, characterised in353.

354. that it further comprises one or more compounds of Formula P355.P356.35357.

358. Foreignfiling_text_P24-240-SEC-WO01359.- 385 -360.in which the individual substituents, on each occurrence identically or differently, and each, independently of one another, have the following meanings:361.5363. 365.R1 and R2 each, independently of one another, denote a H atom, a halogen atom,366.-CN, -SCN, -NCS, an alkyl or an alkoxy group having 1 to 12 C atoms 15 or an alkenyl or an alkenyloxy group having 2 to 12 C atoms in which one or more non-adjacent CH2groups are optionally substituted367.b368.

369. y -C=C-, -CF2O-, -OCF2-, -CH=CH-,370.20371.

372. , -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be replaced by a halogen atom or a cycloalkyl or a cycloalkoxy group having 3 to 12 C atoms, in which one 25 or more H atoms may be replaced by a halogen atom;373.L1to L4each, independently of one another, denote H, F or Cl;374.Y1to Y3each, independently of one another, denote a H atom, an alkyl group having 1 to 3 C atoms or an alkenyl group having 2 to 3 C atoms in which one or more non-adjacent CH2groups are optionally substituted by -C=C-, -CF2O-, -OCF2-, -CH=CH-, -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, preferably H or CH3;375.Z1denotes -CF2O-, -OCF2-, -CH2O-, -OCH2-, -CO-O-, -O-CO-, -C2H4-, 35376.-C2F4-, -CF2CH2-, -CH2CF2-, -CFHCFH-, -CFHCH2-, -CH2CFH-, - Foreignfiling_text_P24-240-SEC-WO01377.- 386 -378.CF2CFH-, -CFHCF2-, -CH=CH-, -CF=CH-, -CH=CF-, -CF=CF-, -C=C- or a single bond;379.k denotes 0, 1, 2 or 3, preferably 1.380.5 15. Liquid-crystalline medium of one or more of Claims 1 to 14, characterised in that it further comprises one or more compounds of Formula B382. 384.in which the individual substituents, on each occurrence identically or differently, and each, independently of one another, have the following meanings:385.15387.

388. 20390.

391. wherein392.25393.R1and R2each, independently of one another, denote one of the meanings given for R1 and R2 in the Formula P;394.Z1-CH2O-, -O-, -C2H4-, -OCH2-, or a single bond;395.Y1-CH2-, -CH2CH2-, -CH=CH-, -CH2O-, -O- or -S-;396.L1 and L H, F or Cl, preferably H or F, very preferably F;397.k 0 or 1.

16. Medium according to one or more of Claims 1 to 15, characterized in that it 35 further comprises one or more compounds selected from the group consistingForeignfiling_text_P24-240-SEC-WO01399.- 387 - of compounds of the Formulae YA, YB, YC, YD, YE, YF and YG:400.5401.15402. 404.20405.

406. 25408.

409. 35 Foreignfiling_text_P24-240-SEC-WO01410.- 388 -411.YG413. 415.5416.in which the individual substituents have the following meanings:417.R21 denotes an alkyl or an alkoxy group having 1 to 12 C atoms or an alkenyl or an alkenyloxy group having 2 to 12 C atoms in which one or more non-adjacent CH2 groups are optionally substituted by -C=C-,418.-419.

420. CF2O-, -OCF2-, -CH=CH-, ^0^, OO,421.15422.

423. , -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be replaced by a halogen atom or a cycloalkyl or a cycloalkoxy group having 3 to 12 C atoms, in which one or more H atoms may be replaced by a halogen atom;424.20425.R²² denotes an alkyl or an alkoxy group having 1 to 6 C atoms or an alkenyl or an alkenyloxy group having 2 to 6 C atoms in which one or more non-adjacent CH2groups are optionally substituted by -C=C-,426.-CF2O-, -OCF2-, -CH=CH-, ”“0*“ OO, 25427.

430.

431. , -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, and in which one or more H atoms may be replaced by a halogen atom or a cycloalkyl or a cycloalkoxy group having 3 to 6 C atoms, in which one or more H atoms may be replaced by a halogen atom;432.L1to L3each, independently of one another, denote F, Cl, CF3or CHF2; and L4and L5each, independently of one another, denote H or F;433.35 R23 denotes a H atom, an alkyl group having 1 to 3 C atoms or an alkenyl group having 2 to 3 C atoms in which one or more non-adjacent CH2 Foreignfiling_text_P24-240-SEC-WO01434.- 389 -435.groups are optionally substituted by -C=C-, -CF2O-,436.-OCF2-, -CH=CH-, -O-, -CO-O- or -O-CO- in such a way that O atoms are not linked directly to one another, preferably H or CH3;437.Z1and Z2each, independently of one another, denote a single bond,438.5439.-CH2CH2-, -CH=CH-, -CF2O-, -OCF2-, -CH2O-, -OCH2-, -COO-, -OCO-, -C2F4-, -CF=CF-, -CH=CHCH2O;440.p 0, 1 or 2; and441.q 0 or 1.

17. Medium according to one or more of Claims 1 to 16, characterized in that it comprises one or more compounds selected from the group consisting of the following formulae LP1 and LP2, preferably one or more compounds of Formula LP1 and one or more compounds of Formula LP2:443.15444.Y°445.LP1447.

448. 20449.Y°450.LP2452.

453. 25454.in which the individual substituents have the following meanings:455.R0and R2each, independently of one another, denote an alkyl or an alkoxy group having 1 to 12 C atoms or an alkenyl or an alkenyloxy group having 2 or 12 C atoms in which one or more non-adjacent CH2groups are optionally substituted by -C=C-, -CF2O-, -OCF2-,456.-CH=CH-, 35457.

460.

461. , -O-, -CO-O- or -O-CO- in such a way that O atoms are Foreignfiling_text_P24-240-SEC-WO01462.- 390 -463.not linked directly to one another, and in which one or more H atoms may be substituted by a cycloalkyl or a cycloalkoxy group having 3 to 12 C atoms;464.X0has one of the meanings given for X0in the Formulae II and III; Y0denote H or CH3; and465.m and n denotes 0 or 1.

18. Medium according to one or more of Claims 1 to 17, characterised in that it comprises one or more compounds of the Formula I, one or more compounds of the Formulae P and, optionally, one or more compounds selected from the group consisting of the Formulae Z1, Z2, Z3, Z4, Z5, III, IV, VI, XIV, XX, XII, XXIII, XXIX, XVI, XVIIa, XVIIb, XVIIc.467.15 19. Medium according to one or more of Claims 1 to 18, characterized in that it comprises one or more compounds of the Formula I, one or more compounds of the Formula B and, optionally, one or more compounds selected from the group consisting of the Formulae LP1 and / or LP2.468.20 20. Medium according to one or more of Claims 1 to 19, characterized in that it comprises one or more compounds of the Formula I, one or more compounds selected from those of formulae YA, YB, YC, YD, YE, YF and YG and, optionally, one or more compounds selected from the group consisting of the Formulae XXIX, XXX and XXVI I la.469.2521. Process for the preparation of a liquid-crystalline medium according to one or more of Claims 1 to 20, characterised in one or more compounds of the Formula I are mixed with one or more mesogenic compounds and optionally one or more polymerizable compounds and / or one or more additives.

22. Use of a liquid-crystalline medium according to one or more of Claims 1 to 20 for electro-optical purposes.472.35 23. Electro-optical liquid-crystal display or an AR / VR headset containing a liquidcrystalline medium according to one or more of Claims 1 to 20. Foreignfiling_text_P24-240-SEC-WO01473.- 391 -24. Electro-optical liquid-crystal display according to Claim 25, characterized in that it is a TN, PS-TN, STN, TN-TFT, OCB, IPS, PS-IPS, FFS, HB-FFS, XB-FFS, PS-HB-FFS, PS-XB-FFS, SA-HB-FFS, SA-XB-FS, polymer stabilised SA-HB- FFS, polymer stabilised SA-XB-FFS, positive VA or positive PS-VA display. 5475.15476.20477.25478.35

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