US 12,325,817 B2
Liquid-crystal medium
Jing Wang, Shanghai (CN)
Assigned to MERCK PATENT GMBH, Darmstadt (DE)
Filed by MERCK PATENT GMBH, Darmstadt (DE)
Filed on Apr. 11, 2023, as Appl. No. 18/133,199.
Application 18/133,199 is a continuation of application No. PCT/CN2022/086049, filed on Apr. 11, 2022.
Prior Publication US 2023/0323209 A1, Oct. 12, 2023
Int. Cl. G02F 1/1333 (2006.01); C09K 19/06 (2006.01); C09K 19/12 (2006.01); C09K 19/20 (2006.01); C09K 19/30 (2006.01); C09K 19/34 (2006.01); C09K 19/54 (2006.01)
CPC C09K 19/544 (2013.01) [C09K 19/062 (2013.01); C09K 19/12 (2013.01); C09K 19/2007 (2013.01); C09K 19/3003 (2013.01); C09K 19/3028 (2013.01); C09K 19/3048 (2013.01); C09K 19/3066 (2013.01); C09K 19/3068 (2013.01); C09K 19/3098 (2013.01); C09K 19/3402 (2013.01); C09K 19/3405 (2013.01); C09K 19/3444 (2013.01); C09K 19/3491 (2013.01); C09K 19/542 (2013.01); C09K 2019/122 (2013.01); C09K 2019/123 (2013.01); C09K 2019/124 (2013.01); C09K 2019/2042 (2013.01); C09K 2019/205 (2013.01); C09K 2019/3004 (2013.01); C09K 2019/3006 (2013.01); C09K 2019/3009 (2013.01); C09K 2019/301 (2013.01); C09K 2019/3016 (2013.01); C09K 2019/3021 (2013.01); C09K 2019/3025 (2013.01); C09K 2019/305 (2013.01); C09K 2019/3056 (2013.01); C09K 2019/3071 (2013.01); C09K 2019/3075 (2013.01); C09K 2019/3078 (2013.01); C09K 2019/3408 (2013.01); C09K 2019/3422 (2013.01); C09K 2019/548 (2013.01)] 17 Claims
 
1. A liquid crystal medium comprising
a) one or more compounds selected from formulae I-1, I-2, and I-3

OG Complex Work Unit Chemistry
in which
RH denotes H, O•, CH3, OH or ORS,
Sp on each occurrence, identically or differently, denotes a spacer group, and
W denotes linear, optionally unsaturated, alkylene having 1 to 12 C atoms or branched, optionally unsaturated, alkylene having 2 to 12 C atoms, in which one or more non-adjacent-CH2-groups may each be replaced with —O—,
wherein the total concentration of the one or more compounds of formulae I-1, I-2, and I-3 is in the range of from 1000 ppm to 5000 ppm;
b) one or more compounds selected from the group of compounds of formulae IIA, IIB, and IIC

OG Complex Work Unit Chemistry
in which
R2A, R2B, and R2C each, independently of one another, denote H, or an alkyl having 1 to 15 C atoms or alkenyl radical having 2 to 15 C atoms which is unsubstituted, monosubstituted by CN or CF3 or at least monosubstituted by halogen, where one or more CH2 groups in these radicals may each be replaced by —O—, —S—,

OG Complex Work Unit Chemistry
 —C≡C—, —CF2O—, —OCF2—, —OC—O—, or —O—CO— in such a way that O atoms are not linked directly to one another;
L1 and L2 each, independently of one another, denote F, Cl, CF3 or CHF2;
Y denotes H, F, Cl, CF3, CHF2, or CH3;
Z2 and Z2B each, independently of one another, denote a single bond, —CH2CH2—, —CH═CH—, —CF2O—, —OCF2—, —CH2O—, —OCH2—, —COO—, —OCO—, —C2F4—, —CF═CF—, or —CH═CHCH2O—;
(O) denotes O or a single bond;
p denotes 0, 1 or 2;
q denotes 0 or 1; and
v denotes 1, 2, 3, 4, 5, or 6;
c) one or more compounds selected from formula IID

OG Complex Work Unit Chemistry
in which
R2D denotes H, or an alkyl having 1 to 15 C atoms or alkenyl radical having 2 to 15 C atoms which is unsubstituted, monosubstituted by CN or CF3 or at least monosubstituted by halogen, where one or more CH2 groups in these radicals may each be replaced by —O—, —S—,

OG Complex Work Unit Chemistry
 —C≡C—, —CF2O—, —OCF2—, —OC—O—, or —O—CO— in such a way that O atoms are not linked directly to one another;
L1 and L2 each, independently of one another, denote F, Cl, CF3 or CHF2;
Y denotes H, F, CI, CF3, CHF2, or CH3;
Z2 denotes a single bond, —CH2CH2—, —CH═CH—, —CF2O—, —OCF2—, —CH2O—, —OCH2—, —COO—, —OCO—, —C2F4—, —CF═CF—, or —CH═CHCH2O—;
ZD is a single bond;
(O) denotes O or a single bond;
q denotes 0 or 1; and
v denotes 1, 2, 3, 4, 5, or 6; and
d) one or more compounds selected from formula IID-10, and/or one or more compounds of formula CL:

OG Complex Work Unit Chemistry
in which
R2D and (O) have the meanings defined for formula IID, and alkyl denotes n-alkyl having 1 to 5 C atoms,
RL denotes H, a straight chain alkyl or alkoxy radical having 1 to 15 C atoms, a branched alkyl or alkoxy radical having 2 to 15 C atoms, a straight chain alkenyl radical having 2 to 15 C atoms, or a branched alkenyl radical having 3 to 15 C atoms, where one or more CH2 groups in these radicals may each be replaced, independently of one another, by

OG Complex Work Unit Chemistry
 —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, in addition, one or more H atoms may each be replaced by halogen,
XL denotes F, CI, CN, CHF2, CF3, OCF3, or, identically or differently, has one of the meanings of RL, and
YL denotes H, F, Cl or CH3.