Polymerisable oligomeric liquid crystal, polymerisable medium and polymerised liquid crystal film
AssigneeMerck Patent GmbH
InventorsDanqing Liu, Yuanyuan Zhan, Efstathios Barmpoutsis, Dirk Jan Broer
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Abstract
A polymerisable oligomeric liquid crystal (LC) and a polymerisable LC medium comprising the polymerisable oligomeric LC together with one or more mono-, di- or multireactive mesogenic compounds. Furthermore, a method for the preparation of the oligomeric LC, a birefringent polymer film obtainable from the polymerisable LC medium, and a method of preparation of such a polymer film. Also, the use of the polymer film as optical component, in particular as ultra-thin polariser (UTP) in a liquid crystal display (LCD), for contrast enhancement in an organic light emitting device (OLED), or for AR/AV/VR applications.
Claims22
A polymerisable liquid crystal medium comprising one or more mono-, di- or multireactive liquid crystal or mesogenic compounds and one or more polymerisable, oligomeric liquid crystal or mesogenic compounds.
A polymerisable oligomeric liquid crystal or mesogenic compound of formula O1:
- wherein n is the average number of repeat units per molecule and is from 1 to 10, e is 1, 2, 3 or 4, Rm is H or CH2, and M is selected from the following formulae::
- wherein L is P-Sp-, F, Cl, Br, I, —CN, —NO2, —NCO, —NCS, —OCN, —SCN, —C(═O)NRxRy, —C(═)ORx, —C(═O)Rx, —NRxRy, —OH, —SF5, optionally substituted silyl, aryl or heterorayl with 1 to 12 C atoms, and straight chain alkyl, alkoxy, alkylcarbonyl, alkoxyvarbonyl, alkylcarbonyloxy or alkoxycarbonyloxy with 1 to 12 C atoms or branched alkyl, alkoxy, alkylcarbonl, alkoxycabinyl, alkylcarbonyloxy or alkoxycarbonyloxy with 3 to 12 C atoms, wherein one or more H atoms are optionally replced by F or Cl, r is 0, 1, 2, 3,or 4 and s is an integerfrom 1 to 20.
Dependencies are inferred from the claim text.