LIQUID-CRYSTAL MEDIUM

Abstract

The invention relates to a liquid-crystalline medium comprising one or more compounds of the formula IA and, one or more compounds of formula BS

##STR00001##

wherein the occurring groups have the meanings indicated in claim 1, and to the use thereof in an active-matrix display, in particular in a VA, IPS, U-IPS, FFS, UB-FFS, SA-VA, SA-FFS, PS-VA, PS-OCB, PS-IPS, PS-FFS, PS-UB-FFS, PS-posi-VA, PS-TN, polymer stabilised SA-VA or polymer stabilised SA-FFS display.

Claims

1. Liquid-crystalline medium, characterised in that it comprises one or more compounds of the formula IA ##STR00468## in which R.sup.11 and R.sup.12 identically or differently, denote H, an alkyl or alkoxy radical having 1 to 15 C atoms, in which one or more CH.sub.2 groups in these radicals are optionally replaced, independently of one another, by —C≡C—, —CF.sub.2O—, —OCF.sub.2—, —CH═CH—, ##STR00469##  —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, and one or more compounds of formula BS ##STR00470## in which alkyl and alkyl* identically or differently, denote alkyl having 1 to 7 C atoms, in which one or more CH.sub.2 groups may be replaced by ##STR00471##

2. Medium according to claim 1, wherein the group R.sup.12 in formula IA denotes alkoxy having 1 to 7 C atoms.

3. Medium according to claim 1, wherein the total concentration of the one or more compounds of the formula IA is in the range of from 1% to 25% by weight and wherein the total concentration of the one or more compounds of formula BS is in the range of from 7% to 20% by weight.

4. Liquid-crystalline medium according to claim 1, wherein the medium has a birefringence of 0.110 or more, measured at 20° C. and at a wavelength of 589.3 nm.

5. Liquid-crystalline medium according to claim 1, wherein the medium has a dielectric anisotropy in the range of from −4.5 to −12.0.

6. Medium according to claim 1, wherein the medium comprises one or more compounds selected from the group of compounds of the formulae IIA, IIB, IIC and IID, ##STR00472## in which R.sup.2A, R.sup.2B, R.sup.2C and R.sup.2D each, independently of one another, denote H, an alkyl or alkenyl radical having up to 15 C atoms which is unsubstituted, monosubstituted by CN or CF.sub.3 or at least monosubstituted by halogen and where one or more CH.sub.2 groups in these radicals may be replaced by —O—, —S—, ##STR00473##  —C≡C—, —CF.sub.2O—, —OCF.sub.2—, —OC—O— or —O—CO— in such a way that O atoms are not linked directly to one another, L.sup.1 to L.sup.4 each, independently of one another, denote F or Cl, Z.sup.2, Z.sup.2B, and Z.sup.2D each, independently of one another, denote a single bond, —CH.sub.2CH.sub.2—, —CH═CH—, —CF.sub.2O—, —OCF.sub.2—, —CH.sub.2O—, —OCH.sub.2—, —COO—, —OCO—, —C.sub.2F.sub.4—, —CF═CF—, —CH═CHCH.sub.2O—, p denotes 0, 1 or 2, q denotes 0 or 1, and v denotes 1 to 6.

7. Liquid-crystalline medium according to claim 6, wherein the medium additionally comprises one or more compounds selected from the group of compounds of formulae O-1 to O-18, ##STR00474## ##STR00475## in which R.sup.1 and R.sup.2 each, independently of one another, have the meanings indicated for R.sup.2A in claim 6.

8. Liquid-crystalline medium according to claim 1, characterised in that the medium additionally comprises one or more compounds selected from the group of the compounds of the formulae T-1 to T-21, ##STR00476## ##STR00477## ##STR00478## in which R denotes a straight-chain alkyl or alkoxy radical having 1 to 6 C atoms, (O) denotes —O— or a single bond, m is 0, 1, 2, 3, 4, 5 or 6 and n is 0, 1, 2, 3 or 4.

9. Liquid-crystalline medium according to claim 1, wherein the medium comprises one or more polymerizable compounds of formula P
P-Sp-A.sup.1-(Z.sup.1-A.sup.2).sub.z-R  P in which P denotes a polymerisable group, Sp denotes a spacer group or a single bond, A.sup.1, A.sup.2 denotes an aromatic, heteroaromatic, alicyclic or heteroaliphatic group, which may also contain fused rings, and which is unsubstituted, or mono- or polysubstituted by L, Z.sup.1 denotes —O—, —S—, —CO—, —CO—O—, —O—CO—, —O—CO—O—, —OCH.sub.2—, —CH.sub.2O—, —SCH.sub.2—, —CH.sub.2S—, —CF.sub.2O—, —OCF.sub.2—, —CF.sub.2S—, —SCF.sub.2—, —(CH.sub.2).sub.n1—, —CF.sub.2CH.sub.2—, —CH.sub.2CF.sub.2—, —(CF.sub.2).sub.n1—, —CH═CH—, —CF═CF—, —CH═CF—, —CF═CH—, —C≡C—, —CH═CH—CO—O—, —O—CO—CH═CH—, —CH.sub.2—CH.sub.2—CO—O—, —O—CO—CH.sub.2—CH.sub.2—, —CR.sup.0R.sup.00—, or a single bond, R.sup.0, R.sup.00 denotes H or alkyl having 1 to 12 C atoms, R denotes H, L, or P-Sp-, L denotes F, Cl, —CN, P-Sp- or straight chain, branched or cyclic alkyl having 1 to 25 C atoms, wherein one or more non-adjacent CH.sub.2-groups are optionally replaced by —O—, —S—, —CO—, —CO—O—, —O—CO—, —O—CO—O— in such a manner that O- and/or S-atoms are not directly connected with each other, and wherein one or more H atoms are each optionally replaced by P-Sp-, F or Cl, z is 0, 1, 2 or 3, and n1 is 1, 2, 3 or 4.

10. Liquid-crystalline medium according to claim 9, wherein the polymerisable compounds of formula P are polymerised.

11. A process of preparing a liquid-crystalline medium according to claim 1, comprising the steps of mixing one or more compounds of formula IA and one or more compounds of formula BS of claim 1 with one or more mesogenic or liquid-crystalline compounds and optionally with one or more polymerizable compounds of formula P
P-Sp-A.sup.1-(Z.sup.1-A.sup.2).sub.z-R  P in which P denotes a polymerisable group, Sp denotes a spacer group or a single bond, A.sup.1, A.sup.2 denotes an aromatic, heteroaromatic, alicyclic or heteroaliphatic group, which may also contain fused rings, and which is unsubstituted, or mono- or polysubstituted by L, Z.sup.1 denotes —O—, —S—, —CO—, —CO—O—, —O—CO—, —O—CO—O—, —OCH.sub.2—, —CH.sub.2O—, —SCH.sub.2—, —CH.sub.2S—, —CF.sub.2O—, —OCF.sub.2—, —CF.sub.2S—, —SCF.sub.2—, —(CH.sub.2).sub.n1—, —CF.sub.2CH.sub.2—, —CH.sub.2CF.sub.2—, —(CF.sub.2).sub.n1—, —CH═CH—, —CF═CF—, —CH═CF—, —CF═CH—, —C≡C—, —CH═CH—CO—O—, —O—CO—CH═CH—, —CH.sub.2—CH.sub.2—CO—O—, —O—CO—CH.sub.2—CH.sub.2—, —CR.sup.0R.sup.00—, or a single bond, R.sup.0, R.sup.00 denotes H or alkyl having 1 to 12 C atoms, R denotes H, L, or P-Sp-, L denotes F, Cl, —CN, P-Sp- or straight chain, branched or cyclic alkyl having 1 to 25 C atoms, wherein one or more non-adjacent CH.sub.2-groups are optionally replaced by —O—, —S—, —CO—, —CO—O—, —O—CO—, —O—CO—O— in such a manner that O- and/or S-atoms are not directly connected with each other, and wherein one or more H atoms are each optionally replaced by P-Sp-, F or Cl, z is 0, 1, 2 or 3, and n1 is 1, 2, 3 or 4, and optionally with one or more additives.

12. (canceled)

13. Liquid-crystal display comprising a medium according to claim 1.

14. Liquid-crystal display according to claim 13, wherein the display is a VA, IPS, FFS, UB-FFS, SA-FFS or SA-VA display.

15. Liquid-crystal display according to claim 13, wherein the display is a PS-VA, PS-IPS, PS-FFS, PS-UB-FFS, polymer stabilised SA-VA or polymer stabilised SA-FFS display.

Description

WORKING EXAMPLES

[0374] The following examples are intended to explain the invention without limiting it. In the examples, m.p. denotes the melting point and C denotes the clearing point of a liquid-crystalline substance in degrees Celsius; boiling temperatures are denoted by m.p. Furthermore: C denotes crystalline solid state, S denotes smectic phase (the index denotes the phase type), N denotes nematic state, Ch denotes cholesteric phase, I denotes isotropic phase, T.sub.g denotes glass-transition temperature. The number between two symbols indicates the conversion temperature in degrees Celsius an.

[0375] The host mixture used for determination of the optical anisotropy Δn of single compounds is the commercial mixture ZLI-4792 (Merck KGaA). The dielectric anisotropy Δε is determined using commercial mixture ZLI-2857. The physical data of the compound to be investigated are obtained from the change in the dielectric constants of the host mixture after addition of the compound to be investigated and extrapolation to 100% of the compound employed. In general, 10% of the compound to be investigated are dissolved in the host mixture, depending on the solubility.

[0376] Unless indicated otherwise, parts or percent data denote parts by weight or percent by weight.

Above and Below:

[0377]

TABLE-US-00009 V.sub.o denotes threshold voltage, capacitive [V] at 20° C., n.sub.e denotes extraordinary refractive index at 20° C. and 589 nm, n.sub.o denotes ordinary refractive index at 20° C. and 589 nm, Δn denotes optical anisotropy at 20° C. and 589 nm, ε.sub.⊥ denotes dielectric permittivity perpendicular to the director at 20° C. and 1 kHz, ε.sub.∥ denotes dielectric permittivity parallel to the director at 20° C. and 1 kHz, Δε denotes dielectric anisotropy at 20° C. and 1 kHz, cl.p., T(N, I) denotes clearing point [° C.], γ.sub.1 denotes rotational viscosity measured at 20° C. [mPa .Math. s], determined by the rotation method in a magnetic field, K.sub.1 denotes elastic constant, “splay” deformation at 20° C. [pN], K.sub.2 denotes elastic constant, “twist” deformation at 20° C. [pN], K.sub.3 denotes elastic constant, “bend” deformation at 20° C. [pN], and LTS denotes low-temperature stability (nematic phase), determined in test cells or in the bulk, as specified.

[0378] Unless explicitly noted otherwise, all values indicated in the present application for temperatures, such as, for example, the melting point T(C,N), the transition from the smectic (S) to the nematic (N) phase T(S,N) and the clearing point T(N,I) or cl.p., are indicated in degrees Celsius (° C.). M.p. denotes melting point. Furthermore, Tg=glass state, C=crystalline state, N=nematic phase, S=smectic phase and I=isotropic phase. The numbers between these symbols represent the transition temperatures.

[0379] The term “threshold voltage” for the present invention relates to the capacitive threshold (V.sub.0), also called the Freedericksz threshold, unless explicitly indicated otherwise. In the examples, as is generally usual, the optical threshold can also be indicated for 10% relative contrast (V.sub.10).

[0380] The display used for measurement of the capacitive threshold voltage consists of two plane-parallel glass outer plates at a separation of 20 μm, which each have on the insides an electrode layer and an unrubbed polyimide alignment layer on top, which cause a homeotropic edge alignment of the liquid-crystal molecules.

[0381] The display or test cell used for measurement of the tilt angle consists of two plane-parallel glass outer plates at a separation of 4 μm, which each have on the insides an electrode layer and a polyimide alignment layer on top, where the two polyimide layers are rubbed antiparallel to one another and cause a homeotropic edge alignment of the liquid-crystal molecules.

[0382] Unless indicated otherwise, the VHR is determined at 20° C. (VHR.sub.20) and after minutes in an oven at 100° C. (VHR.sub.100) in a commercially available instrument Model 6254 from TOYO Corporation, Japan. The voltage used has a frequency of in a range from 1 Hz to 60 Hz, unless indicated more precisely.

[0383] The accuracy of the VHR measurement values depends on the respective value of the VHR. The accuracy decreases with decreasing values. The deviations generally observed in the case of values in the various magnitude ranges are compiled in their order of magnitude in the following table.

TABLE-US-00010 VHR range Deviation (relative) VHR values Δ.sub.GVHR/VHR/% from to Approx. 99.6%.sup.  100%  +/−0.1 99.0%.sup.  99.6%.sup.  +/−0.2 98% 99% +/−0.3 95% 98% +/−0.5 90% 95% +/−1 80% 90% +/−2 60% 80% +/−4 40% 60% +/−8 20% 40% +/−10 10% 20% +/−20

[0384] The stability to UV irradiation is investigated in a “Suntest CPS”, a commercial instrument from Heraeus, Germany. The sealed test cells are irradiated for between 30 min and 2.0 hours, unless explicitly indicated, without additional heating. The irradiation power in the wavelength range from 300 nm to 800 nm is 765 W/m.sup.2 V. A UV “cut-off” filter having an edge wavelength of 310 nm is used in order to simulate the so-called window glass mode. In each series of experiments, at least four test cells are investigated for each condition, and the respective results are indicated as averages of the corresponding individual measurements.

[0385] The decrease in the voltage holding ratio (ΔVHR) usually caused by the exposure, for example by UV irradiation or by LCD backlighting, is determined in accordance with the following equation (1):

ΔVHR(t)=VHR(t)−VHR(t=0)  (1).

[0386] In order to investigate the low-temperature stability (LTS), i.e. the stability of the LC mixture in the bulk against spontaneous crystallisation of individual components at low temperatures or the occurrence of smectic phases, several sealed bottles, each containing about 1 g of the material, are stored at one or more given temperatures, typically of −10° C., −20° C., −30° C. and/or −40° C. and it is inspected at regular intervals visually, whether a phase transition is observed or not. As soon as the first one of the samples at a given temperature shows a change time is noted. The time until the last inspection, at which no change has been observed, is noted as the respective LTS.

[0387] The ion density from which the resistivity is calculated is measured using the commercially available LC Material Characteristics Measurement System Model 6254 from Toyo Corporation, Japan, using VHR test cells with AL16301 Polyimide (JSR Corp., Japan) having a 3.2 μm cell gap. The measurement is performed after 5 min of storage in an oven at 60° C. or 100° C.

[0388] The so-called “HTP” denotes the helical twisting power of an optically active or chiral substance in an LC medium (in μm). Unless indicated otherwise, the HTP is measured in the commercially available nematic LC host mixture MLD-6260 (Merck KGaA) at a temperature of 20° C.

[0389] Unless explicitly noted otherwise, all concentrations in the present application are indicated in percent by weight and relate to the corresponding mixture as a whole, comprising all solid or liquid-crystalline components, without solvents. All physical properties are determined in accordance with “Merck Liquid Crystals, Physical Properties of Liquid Crystals”, Status November 1997, Merck KGaA, Germany, and apply for a temperature of 20° C., unless explicitly indicated otherwise.

[0390] The following mixture examples having negative dielectric anisotropy are suitable, in particular, for liquid-crystal displays which have at least one planar alignment layer, such as, for example, IPS and FFS displays, in particular UB-FFS (=ultra-bright FFS), and for VA displays.

Mixture Examples

Mixture M1:

[0391]

TABLE-US-00011 CC-3-V 45.0% Clearing point/° C.: 77.5 CPY-3-O2 5.0% Δn (589 nm, 20° C.): 0.1248 CLY-3-O2 3.0% n.sub.e (589 nm, 20° C.): 1.6157 CLY-3-O3 3.0% Δε (1 kHz, 20° C.): −3.5 CLY-2-O4 2.0% ε.sub.⊥ (1 kHz, 20° C.]: 7.2 CLY-4-O2 2.0% K.sub.1 [pN], (20° C.): 14.5 PY-1-O2 7.5% K.sub.3 (pN, 20° C.): 13.8 PYP-2-3 11.5% V.sub.0 (20° C.)/V: 2.09 PGIY-2-O4 6.0% γ.sub.1 (20° C.)/mPa .Math. s: 88 COB(S)-2-O4 8.0% LTS.sub.bulk (−20° C.)/h: 1000 B(S)-2O-O4 3.0% LTS.sub.bulk (−25° C.)/h: 552 B(S)-2O-O5 4.0% LTS.sub.bulk (−30° C.)/h: 216 Σ 100.0%

Mixture M2:

[0392]

TABLE-US-00012 CPY-2-O2 4.0% Clearing point/° C.: 77.5 CPY-3-O2 10.0% Δn (589 nm, 20° C.): 0.1248 PGIY-2-O4 6.0% n.sub.e (589 nm, 20° C.): 1.6158 PYP-2-3 9.5% Δε (1 kHz, 20° C.): −3.4 B(S)-2O-O5 3.0% ε.sub.⊥ (1 kHz, 20° C.]: 7.0 B(S)-2O-O4 3.5% K.sub.1 (pN, 20° C.): 14.1 B(S)-2O-O6 2.5% K.sub.3 (pN, 20° C.): 13.6 COB(S)-2-O4 9.0% V.sub.0 (20° C.)/V: 2.11 PY-3-O2 5.0% γ.sub.1 (20° C.)/mPa .Math. s: 85 CC-3-V 47.5% LTS.sub.bulk (−20° C.)/h: 1000 Σ 100.0% LTS.sub.bulk (−25° C.)/h: 720
Mixture M3 is prepared as follows:

TABLE-US-00013 B(S)-2O-O4 4.0% Clearing point/° C.: 78.5 B(S)-2O-O5 4.0% Δn (589 nm, 20° C.): 0.1071 CC-3-V 26.5% n.sub.e (589 nm, 20° C.): 1.5910 CLY-2-O4 4.0% Δε (1 kHz, 20° C.): −6.4 CLY-3-O2 6.0% ε.sub.⊥ (1 kHz, 20° C.]: 10.6 CLY-3-O3 5.0% K.sub.1 (pN, 20° C.): 14.2 CLY-4-O2 4.5% K.sub.3 (pN, 20° C.): 14.8 CLY-5-O2 5.0% V.sub.0 (20° C.)/V: 1.60 COB(S)-2-O4 8.0% γ.sub.1 (20° C.)/mPa .Math. s: 144 CPY-3-O2 6.5% LTS.sub.bulk (−20° C.)/h: >854 CY-3-O2 15.5% LTS.sub.bulk (−30° C.)/h: >854 CY-3-O4 11.0% Σ 100.0%

[0393] As can be seen, the use of a combination of a compound of formula IA and a compound of formula BS according to the invention results in a medium with excellent LTS especially at −30° C.

[0394] In addition, the VHR of the mixture M-3 is very high.

TABLE-US-00014 Mixture VHR initial VHR after suntest M-3 87.1 84.0

[0395] VHR measured at 60° C., 1V, 1 Hz

Mixture M4 is prepared as follows:

TABLE-US-00015 B(S)-2O-O4 4.0% Clearing point/° C.: 78.0 B(S)-2O-O5 4.0% Δn (589 nm, 20° C.): 0.1058 CC-3-V 26.5% n.sub.e (589 nm, 20° C.): 1.5884 CLY-2-O4 4.0% Δε (1 kHz, 20° C.): −6.7 CLY-3-O2 6.0% ε.sub.⊥ (1 kHz, 20° C.]: 11.0 CLY-3-O3 5.0% K.sub.1 (pN, 20° C.): 14.7 CLY-4-O2 4.5% K.sub.3 (pN, 20° C.): 14.3 CLY-5-O2 5.0% V.sub.0 (20° C.)/ V: 1.55 COB(S)-2-O4 8.0% LTS.sub.bulk (−20° C.)/h: >168 CPY-3-O2 6.5% LTS.sub.bulk (−30° C.)/h: >168 CY-3-O2 15.5% CY-3-O4 11.0% Σ 100.0%

Mixture M5

[0396] The Mixture M5 consists of 99.965% of the Mixture M4 and 0.035% of the compound of formula ST-3a-1.

##STR00466##

Mixture M6

[0397] The Mixture M6 consists of 99.965% of the Mixture M4 and 0.025% of the compound of formula ST-3b-1.

##STR00467##

Mixture M7

[0398]

TABLE-US-00016 B(S)-2O-O4 4.0% Clearing point/° C.: 74.5 B(S)-2O-O5 4.0% Δn (589 nm, 20° C.): 0.1127 B(S)-2O-O6 2.0% n.sub.e (589 nm, 20° C.): 1.5910 CC-3-V 47.5% Δε (1 kHz, 20° C.): −3.5 CC-3-V1 1.0% ε.sub.⊥ (1 kHz, 20° C.]: 7.1 CLY-3-O2 3.0% K.sub.1 (pN, 20° C.): 13.7 COB(S)-2-O4 10.0% K.sub.3 (pN, 20° C.): 13.6 CPY-3-O2 10.0% V.sub.0 (20° C.)/V: 2.09 CY-3-O2 8.5% γ.sub.1 (20° C.)/mPa .Math. s: 79 PYP-2-3 10.0% Σ 100.0%

Mixture M8

[0399]

TABLE-US-00017 COB(S)-2-O4 10.0% Clearing point/° C.: 74.3 B(S)-2O-O5 4.0% Δn (589 nm, 20° C.): 0.1065 CCY-3-O1 6.0% n.sub.e (589 nm, 20° C.): 1.5905 CCY-3-O2 9.0% Δε (1 kHz, 20° C.): −6.7 CLY-3-O2 3.0% ε.sub.⊥ (1 kHz, 20° C.]: 11.1 CPY-3-O2 5.0% K.sub.1 (pN, 20° C.): 13.6 B(S)2O-O4 4.0% K.sub.3 (pN, 20° C.): 14.6 B(S)2O-O6 4.0% V.sub.0 (20° C.)/V: 1.55 CC-3-V 28.5% γ.sub.1 (20° C.)/mPa .Math. s: 132 CY-3-O2 18.5% CY-5-O2 8.0% Σ 100.0%

Mixture M9

[0400]

TABLE-US-00018 B(S)-2O-O4 4.0% Clearing point/° C.: 74.6 B(S)-2O-O5 4.0% Δn (589 nm, 20° C.): 0.1070 B(S)-2O-O6 2.0% n.sub.e (589 nm, 20° C.): 1.5938 CC-3-V 49.0% Δε (1 kHz, 20° C.): −3.4 CCP-V-1 1.5% ε.sub.⊥ (1 kHz, 20° C.]: 7.0 CLY-3-O2 3.5% K.sub.1 (pN, 20° C.): 13.7 COB(S)-2-O4 10.0% K.sub.3 (pN, 20° C.): 13.7 CPY-3-O2 10.0% V.sub.0 (20° C.)/V: 2.10 CY-3-O2 9.0% γ.sub.1 (20° C.)/mPa .Math. s: 78 PYP-2-3 7.0% Σ 100.0%

Mixture M9

[0401]

TABLE-US-00019 B(S)-2O-O4 4.0% Clearing point/° C.: 74.5 B(S)-2O-O5 4.0% Δn (589 nm, 20° C.): 0.1127 B(S)-2O-O6 2.0% n.sub.e (589 nm, 20° C.): 1.6002 CC-3-V 47.5% Δε (1 kHz, 20° C.): −3.5 CC-3-V1 1.0% ε.sub.⊥ (1 kHz, 20° C.]: 7.1 CLY-3-O2 3.0% K.sub.1 (pN, 20° C.): 13.7 COB(S)-2-O4 10.0% K.sub.3 (pN, 20° C.): 13.6 CPY-3-O2 10.0% V.sub.0 (20° C.)/V: 2.09 CY-3-O2 8.5% γ.sub.1 (20° C.)/mPa .Math. s: 79 PYP-2-3 10.0% Σ 100.0%

Mixture M10

[0402]

TABLE-US-00020 B(S)-2O-O4 4.0% Clearing point/° C.: 72.5 B(S)-2O-O5 4.0% Δn (589 nm, 20° C.): 0.1152 B(S)-2O-O6 4.0% n.sub.e (589 nm, 20° C.): 1.6004 CC-3-V 22.5% Δε (1 kHz, 20° C.): −6.7 CC-3-V1 7.5% ε.sub.⊥ (1 kHz, 20° C.]: 11.0 CCY-3-O2 1.0% K.sub.1 (pN, 20° C.): 13.7 CLY-3-O2 6.0% K.sub.3 (pN, 20° C.): 14.8 COB(S)-2-O4 12.0% V.sub.0 (20° C.)/V: 1.56 CPY-3-O2 10.0% γ.sub.1 (20° C.)/mPa .Math. s: 133 CY-3-O2 19.0% CY-5-O2 8.5% PGIY-2-O4 1.5% Σ 100.0%

Mixture M11

[0403]

TABLE-US-00021 B(S)-2O-O4 4.0% Clearing point/° C.: 73.5 B(S)-2O-O5 4.0% Δn (589 nm, 20° C.): 0.1098 B(S)-2O-O6 4.0% n.sub.e (589 nm, 20° C.): 1.5938 CC-3-V 24.5% Δε (1 kHz, 20° C.): −6.7 CC-3-V1 5.5% ε.sub.⊥ (1 kHz, 20° C.]: 11.0 CCY-3-O2 6.0% K.sub.1 (pN, 20° C.): 14.2 CLY-2-O4 1.5% K.sub.3 (pN, 20° C.): 14.7 CLY-3-O2 6.0% V.sub.0 (20° C.)/V: 1.55 COB(S)-2-O4 12.0% γ.sub.1 (20° C.)/mPa .Math. s: 131 CPY-3-O2 5.5% CY-3-O2 19.0% CY-5-O2 8.0% Σ 100.0%

Mixture M12

[0404]

TABLE-US-00022 B(S)-2O-O4 4.0% Clearing point/° C.: 96.9 B(S)-2O-O5 4.0% Δn (589 nm, 20° C.): 0.1017 B(S)-2O-O6 2.0% n.sub.e (589 nm, 20° C.): 1.5846 CC-3-V 34.5% Δε (1 kHz, 20° C.): −4.5 CC-3-V1 11.0% ε.sub.⊥ (1 kHz, 20° C.]: 11.0 CCY-3-O2 6.0% K.sub.1 (pN, 20° C.): 18.7 CCY-4-O2 3.0% K.sub.3 (pN, 20° C.): 18.5 CCY-5-O2 6.0% V.sub.0 (20° C.)/V: 2.13 CLY-3-O2 8.0% γ.sub.1 (20° C.)/mPa .Math. s: 126 CLY-5-O2 5.0% COB(S)-2-O4 11.0% CY-3-O2 5.5% Σ 100.0%