Compounds and liquid-crystalline medium

US10913897B2 · kind B2 · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Martin Engel · Libertyville, US
• Sabrina Maag · Pfungstadt, DE
• Ingo Almeroth · Bensheim, DE
• Rocco Fortte · Frankfurt am Main, DE
• Achim Goetz · Zwingenberg, DE
• Thorsten Kodek · Mörfelden, DE
• Oliver Heppert · Weiterstadt, DE

Key dates

• Filing date: Jan 30, 2018
• Grant date: Feb 9, 2021
• Expiry date: Jan 30, 2038

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K2019/3408
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Compounds of the formula I, and liquid-crystalline media, preferably having a nematic phase and negative dielectric anisotropy, comprising Methods for making and using these liquid-crystalline media in electro-optical displays, particularly in active-matrix displays based on the VA, ECB, PALC, FFS or IPS effect and the displays which contain these media. Methods for stabilizing liquid-crystalline media with compounds of formula I, where the liquid-crystalline media comprise one or more compounds of the formula II and one or more compounds selected from compounds of the formulae III-1 to III-4 and formula B.