Patent ID: 11905448
Assignee: MERCK PATENT GMBH
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  G | IPC C  G

Claim 0:
1. An LC medium having negative dielectric anisotropy and comprising one or more polymerizable compounds, one or more compounds of formula IA, and one or more compounds of formula IB, , in which the individual radicals, on each occurrence identically or differently, and each, independently of one another, have the following meaning:
R1, R2 are each, independently, straight chain alkyl having 1 to 25 C atoms, branched alkyl having 3 to 25 C atoms, or cyclic alkyl having 3 to 25 C atoms, wherein one or more non-adjacent CH2-groups are optionally replaced by —O—, —S—, —CO—, —CO—O—, —O—CO—, —O—CO—O—, CR0═CR00—, —C≡C—,, 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 F or Cl,
R0, R00 are each, independently, H or alkyl having 1 to 12 C atoms,
Y1 is S, and
L1, L2 are each, independently, F or Cl,
wherein the total proportion of the compounds of formula IB in the LC medium is from 0.5% to 1.5% by weight.