Polymerisable liquid crystal material and polymerised liquid crystal film
AssigneeMerck Patent GmbH
InventorsYong-Hyun Choi, Hyun-Jin Yoon, Bjoern Schnatwinkel
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Abstract
The invention relates to a polymerisable LC material comprising one or more di- or multireactive mesogenic compounds and one or more compounds of formula UVI, wherein the individual radicals have one of the meaning as given in the claims. Furthermore, the present invention relates also to a method for its preparation, a polymer film with improved thermal durability and UV stability obtainable from a corresponding polymerisable LC material, to a method of preparation of such polymer film, and to the use of such polymer film and said polymerisable LC material for optical, electrooptical, decorative or security devices.
Claims23
A polymerizable LC material comprising at least one di- or multireactive mesogenic compound and one or more compounds of formula UVI,
- wherein the individual radicals have the following meanings:
- R1 to R5 are each independently selected from H, alkyl, —OH, -alkylaryl, -alkylheteroaryl, cycloalkyl, cycloheteroalkyl, alkenyl, aryl, and —SO3H, and
- R6 and R7 together form an optionally substituted cycloalkyl or cycloheteroalkyl ring.
Dependencies are inferred from the claim text.