Patent ID: 8968840
Filing Date: 2015-03-03
Classification: C09K

Abstract:
1. A liquid-crystalline medium based on a mixture of polar compounds having negative dielectric anisotropy (Δ∈), which has a value for the ratio γ 1 /Δn 2 in the range 6-45 Pa·s with a clearing point of >60° C. and a Δ∈ of ≦−2.3, and comprises a compound of formula B-4 in which alkyl and alkyl* each, independently of one another, denote a straight-chain alkyl radical having 1-6 C atoms; at least one compound selected from the following group of compounds in which alkyl and alkyl* each, independently of one another, denote a straight-chain alkyl radical having 1-6 C atoms and at least two compounds of the formulae IA, IB and/or II in which R  —C≡C—, —CF v denotes 1 to 6.