Patent ID: 7396486

Claim:
A polymerizable mixture (P) comprising A) at least one monomer or oligomer (A), each monomer or oligomer (A) having at least two polymerizable functional groups selected from the group consisting of (meth)acrylate ester, epoxy, and vinyl ether groups, B) at least one liquid crystalline monomer or oligomer (B), each monomer or oligomer (B) having at least one mesogenic group having an aromatic double ring structure, and having a single polymerizable functional group selected from the group consisting of (meth)acrylate ester, epoxy, and vinyl ether groups, C) from 1 to less than 50% by weight, based on the weight of the polymerizable mixture, of one or more monomers (C) which have at least one mesogenic group having an aromatic double ring structure and contain no group which reacts substantially with the polymerizable functional groups of the monomers or oligomers (A) and (B) during polymerization of said polymerizable mixture, said mixture, when polymerized, forming a stable polymer film.