Polymerizable mixtures
AssigneeWacker Chemie AG
InventorsEckhard Hanelt, Thilo Gebhard, Markus Jandke
Life of this patent
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Abstract
A mixture which is polymerizable to polymers exhibiting a high optical anisotropy which is stable during polymerization. The mixture contains a first monomer or (and/or) oligomer having two or more polymerizable functional groups and optionally a mesogenic group; a second monomer or oligomer bearing at least one mesogenic group having an aromatic double ring structure and only one polymerizable group; and from 1 to 50% by weight of a monomer non-polymerizable with the first or second monomer, but which also contains a mesogenic group having an aromatic double ring structure.
Claims20
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.
Dependencies are inferred from the claim text.