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US 7,211,302 B2Granted
Photostable liquid crystalline medium
AssigneeMerck Patent GmbH
InventorsAtsutaka Manabe, Ulrich Heywang, Detlef Pauluth, Michael Heckmeier, Peer Kirsch, Elvira Montenegro
Life of this patent
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Abstract
The invention relates to a photostable liquid-crystalline medium comprising at least one compound of the formula I and at least one compound of the formula II and to the use thereof for electro-optical purposes, and to displays containing this medium.
Claims10
Liquid-crystalline medium comprising
- at least one compound of the formula I
- and
- at least one compound of the formula II
- in which
- L1, L2, L3 and L4 are each, independently of one another, H or F;
- R11 is H, a halogenated or unsubstituted alkyl radical having from 1 to 15 carbon atoms, where, in addition, one or more CH2 groups in these radicals may each be replaced, independently of one another, by —C≡C—, —CH═CH—, —O—, —CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another;
- R21 and R22 are each, independently of one another, H, or an unsubstituted alkyl radical having 1 to 15 carbon atoms, where, in addition, one or more CH2 groups in these radicals may each be replaced, independently of one another, by —C≡C—, —CH═CH—, —O—, —CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another;
- Y11 is F, Cl, CN, SF5, SCN, NCS, a halogenated alkyl radical, a halogenated alkenyl radical, a halogenated alkoxy radical or a halogenated alkenyloxy radical, each having up to 6 carbon atoms;
- Z11 is a single bond, —CH2—CH2—, —CH═CH—, —CH═CF—, —CF═CH—, —CF═CF—, —C≡C—, —COO—, —OCO—, —CF2O— or —OCF2—;
- a is 0 or 1;
- b, c, d and e are each, independently of one another, 0, 1 or 2;
- f is 1;
- and further comprising a compound of the formula III
- in which
- L31 is H or F;
- R31 is H, a halogenated or unsubstituted alkyl radical having 1 to 15 carbon atoms, where one or more CH2 groups in these radicals may also be replaced by —C≡C—, —CH═CH—, —O—, —CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another;
- R32 is H, F, Cl, a halogenated or unsubstituted alkyl radical having 1 to 15 carbon atoms, where one or more CH2 groups in these radicals may also be replaced by —C≡C—, —CH═CH—, —O—, —CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another;
- and
- j is 0 or 1.
16 more elements
Liquid-crystalline medium comprising—at least one compound of formula I
- and
- at least one compound of formula II
- in which
- L1, L2, L3 and L4 are each, independently of one another, H or F;
- R11 is H, a halogenated or unsubstituted alkyl radical having 1 to 15 carbon atoms, where, in addition, one or more CH2 groups in these radicals may each be replaced, independently of one another, by —C≡C—, —CH═CH—, —O—, —CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another;
- R21 and R22 each, independently of one another, H, or an unsubstituted alkyl radical having 1 to 15 carbon atoms, where, in addition, one or more CH2 groups in these radicals may each be replaced, independently of one another, by —C≡C—, —CH═CH—, —O—, —CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another;
- Y11 is F, Cl, CN, SF5, SCN, NCS, a halogenated alkyl radical, a halogenated alkenyl radical, a halogenated alkoxy radical or a halogenated alkenyloxy radical, each having up to 6 carbon atoms;
- Z11 is a single bond, —CH2—CH2—, —CH═CH—, —CH═CF—, —CF═CH—, —CF═CF—, —C≡C—, —COO—, —OCO—, —CF2O— or —OCF2—;
- a is 0 or 1;
- b, c, d and e are each, independently of one another, 0, 1 or 2;
- f is 1;
- further
- comprising a compound of the formulae IV and/or V
- in which
- R41, R42 and R51, independently of one another, are alkyl having 1 to 12 carbon atoms.
12 more elements
Liquid-crystalline medium comprising—at least one compound of formula I
- and
- at least one compound of formula II
- in which
- L1, L2, L3 and L4 are each, independently of one another, H or F;
- R11 is H, a halogenated or unsubstituted alkyl radical having 1 to 15 carbon atoms, where, in addition, one or more CH2 groups in these radicals may each be replaced, independently of one another, by —C≡C—, —CH═CH—, —O—, —CO—O— or —O—CO— in such a way that O atoms are not linked directly to one another;
- R21 and R22 are each, independently of one another, H, or an unsubstituted alkyl radical having 1 to 15 carbon atoms, where, in addition, one or more CH2 groups in these radicals may each be replaced, independently of one another, by —C≡C—, —CH═CH—, —O—, —CO—O— or —O—O— in such a way that O atoms are not linked directly to one another;
- Y11 is F, Cl, CN, SF5, SCN, NCS, a halogenated alkyl radical, a halogenated alkenyl radical, a halogenated alkoxy radical or a halogenated alkenyloxy radical, each having up to 6 carbon atoms;
- Z11 is a single bond, —CH2—CH2—, —CH═CH—, —CH═CF—, —CF═CH—, —CF═CF—, —C≡C—, —COO—, —OCO—, —CF2O— or —OCF2—;
- a is 0 or 1;
- b, c, d and e are each, independently of one another, 0, 1 or 2;
- f is 1:
- further comprising a compound of the formulae VI and/or VII and/or VIII
- in which
- R61, R71 and R81, independently of one another, are alkyl having 1 to 12 carbon atoms.
11 more elements
Dependencies are inferred from the claim text.