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US 8,551,358 B2Granted
Liquid-crystalline medium
AssigneeMerck Patent GmbH
InventorsSeung-Eun Lee, Eun Young Kim, Dong-Mee Song, Kyung-Ah Park, Sang-Hyun Park, Eun-Kyu Lee
Life of this patent
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Abstract
The present invention relates to a liquid-crystalline medium, characterised in that it contains a polymerisable component (A) containing one more polymerisable compounds and a liquid-crystalline component (B) containing one more compounds of the general formula I in which R, rings A1 and A2, Z1, Z2, Y1, Y2, X0 and r are as defined in Claim 1.
Claims20
A liquid-crystalline medium, comprising
- a polymerizable component (A) containing one more polymerizable compounds and
- a liquid-crystalline component (B) containing one more compounds of formula I
- in which
- R0 is an alkyl or alkenyl radical having from 1 to 15 carbon atoms which is unsubstituted, monosubstituted by CN or CF3, or at least monosubstituted by halogen, in which one or more CH2 groups are optionally, independently of one another, replaced by —O—, —S—,
- —CO—, —CO—O—, —O—CO—, —O—CO—O—, —CH═CH— or —C≡C— in such a way that O atoms are not linked directly to one another,
- are each independently
- Y1 and Y2 are each, independently of one another, H or F,
- Z1 is —CF2O—, —OCF2— or —COO—,
- Z2 is —O—, —S—, —CO—, —COO—, —OCO—, —S—CO—, —CO—S—, —OCH2—, —CH2O—, —SCH2—, —CH2S—, —CF2O—, —OCF2—, —CF2S—, —SCF2—, —CH2CH2—, —CF2CH2—, —CH2CF2—, —CF2CF2—, —CH═CH—, —CF═CH—, —CH═CF—, —CF═CF—, —C≡C— or a single bond,
- X0 is F, Cl, halogenated alkyl, halogenated alkenyl, halogenated alkoxy, or halogenated alkenyloxy having up to 6 carbon atoms, and
- r is 0, 1, 2 or 3,
- which liquid-crystalline medium has a positive dielectric anisotropy Δ∈.
9 more elements
A liquid-crystalline medium, comprising
- a polymerizable component (A) containing one more polymerizable compounds and
- a liquid-crystalline component (B) containing one more compounds of formulae I3 to I5,
- in which
- R is an alkyl or alkenyl radical having from 1 to 15 carbon atoms which is unsubstituted, monosubstituted by CN or CF3, or at least monosubstituted by halogen, in which one or more CH2 groups are optionally, independently of one another, replaced by —O—, —S—,
- —CO—, —CO—O—, —O—CO—, —O—CO—O—, —CH═CH— or —C≡C— in such a way that O atoms are not linked directly to one another,
- are each independently
- Y1 and Y2 are each, independently of one another, H or F,
- Z1 is —CF2O—, —OCF2— or —COO—,
- Z2 is —O—, —S—, —CO—, —COO—, —OCO—, —S—CO—, —CO—S—, —OCH2—, —CH2O—, —SCH2—, —CH2S—, —CF2O—, —OCF2—, —CF2S—, —SCF2—, —CH2CH2—, —CF2CH2—, —CH2CF2—, —CF2CF2—, —CH═CH—, —CF═CH—, —CH═CF—, —CF═CF—, —C≡C— or a single bond,
- X0 is F, Cl, halogenated alkyl, halogenated alkenyl, halogenated alkoxy, or halogenated alkenyloxy having up to 6 carbon atoms, and
- r is 0, 1, 2 or 3,
- which liquid-crystalline medium has a positive dielectric anisotropy Δ∈.
9 more elements
An electro-optical liquid-crystal display, which is a TN, TN-TFT, FFS or IPS display, and which contains a liquid-crystalline medium, comprising
- a polymerizable component (A) containing one more polymerizable compounds and
- a liquid-crystalline component (B) containing one more compounds of formula I, wherein the proportion of the compounds of formula I in the medium as a whole is from 2 to 30% by weight based on the total medium,
- in which
- R0 is an alkyl or alkenyl radical having from 1 to 15 carbon atoms which is unsubstituted, monosubstituted by CN or CF3, or at least monosubstituted by halogen, in which one or more CH2 groups are optionally, independently of one another, replaced by —O—, —S—,
- —CO—, —CO—O—, —O—CO—, —O—CO—O—, —CH═CH— or —C≡C— in such a way that O atoms are not linked directly to one another,
- are each independently
- Y1 and Y2 are each, independently of one another, H or F,
- Z1 is —CF2O—, —OCF2— or —COO—,
- Z2 is —O—, —S—, —CO—, —COO—, —OCO—, —S—CO—, —CO—S—, —OCH2—, —CH2O—, —SCH2—, —CH2S—, —CF2O—, —OCF2—, —CF2S—, —SCF2—, —CH2CH2—, —CF2CH2—, —CH2CF2—, —CF2CF2—, —CH═CH—, —CF═CH—, —CH═CF—, —CF═CF—, —C≡C— or a single bond,
- X0 is F, Cl, halogenated alkyl, halogenated alkenyl, halogenated alkoxy, or halogenated alkenyloxy having up to 6 carbon atoms, and
- r is 0, 1, 2 or 3,
- which liquid-crystalline medium has a positive dielectric anisotropy Δ∈.
9 more elements
Dependencies are inferred from the claim text.