CPC C09K 19/3405 (2013.01) [C09K 19/12 (2013.01); C09K 19/3003 (2013.01); C09K 19/3098 (2013.01); C09K 19/32 (2013.01); C09K 19/3491 (2013.01); C09K 19/44 (2013.01); G02F 1/1362 (2013.01); C09K 2019/0448 (2013.01); C09K 2019/122 (2013.01); C09K 2019/123 (2013.01); C09K 2019/301 (2013.01); C09K 2019/3004 (2013.01); C09K 2019/3016 (2013.01); C09K 2019/3027 (2013.01); C09K 2019/3408 (2013.01); C09K 2019/3425 (2013.01)] | 9 Claims |
1. A liquid-crystalline medium, consisting of at least one compound of formula I,
in which
R1 and R1* each, independently of one another, denote H, an alkyl or alkoxy radical having 1 to 15 C atoms, in which one or more CH2 groups may each be replaced, independently of one another, 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, and in which one or more H atoms may be replaced by halogen,
X denotes —O—, and
L2 and L2 each, independently of one another, denote F, Cl, CF3 or CHF2,
and at least one compound of the following formulae ST,
in which
RST denotes H, an alkyl or alkoxy radical having 1 to 15 C atoms, in which one or more CH2 groups may each be replaced, independently of one another, 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, and in which one or more H atoms may be replaced by halogen,
denotes
ZST each, independently of one another, denotes —CO—O—, —O—CO—, —CF2O—, —OCF2—, —CH2O—, —OCH2—, —CH2—, —CH2CH2—, —(CH2)4—, —CH═CH—CH2O—, —C2F4—, —CH2CF2—, —CF2CH2—, —CF═CF—, —CH═CF—, —CF═CH—, —CH═CH—, —C≡C— or a single bond,
L2 and L2 each, independently of one another, denote F, Cl, CF3 or CHF2,
p denotes 1 or 2, and
q denotes 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10,
and at least one compound of formula IIA or IIB
in which
R2A and R2B each, independently of one another, denote H, a C1-15-alkyl or C2-15-alkenyl radical which is unsubstituted, monosubstituted by CN or CF3 or at least monosubstituted by halogen, in which one or more CH2 groups may be replaced by —O—, —S—,
—C≡C—, —CF2O—, —OCF2—, —OC—O— or —O—CO— in such a way that O atoms are not linked directly to one another,
L1-4 each, independently of one another, denote F or Cl,
Z2 and Z2′ each, independently of one another, denote a single bond, —CH2CH2—, —CH═CH—, —CF2O—, —OCF2—, —CH2O—, —OCH2—, —COO—, —OCO—, —C2F4—, —CF═CF—, or —CH═CHCH2O—,
p denotes 0, 1 or 2,
q denotes 0 or 1, and
denotes 1 to 6,
and one or more compounds of formulae L-1 to L-11,
in which
R, R1 and R2 each, independently of one another, denote H, a C1-15-alkyl or C2-15-alkenyl radical which is unsubstituted, monosubstituted by CN or CF3 or at least monosubstituted by halogen, in which one or more CH2 groups may be replaced by —O—, —S—,
—C≡C—, —CF2O—, —OCF2—, —OC—O— or —O—CO— in such a way that O atoms are not linked directly to one another,
alkyl denotes an alkyl radical having 1-6 C atoms,
(O) represents an optionally present oxygen atom, and
s denotes 1 or 2.
|