Polymeric film
AssigneeMerck Patent GmbH
InventorsDavid Coates, Simon Greenfield, Emma Jane Jolliffe
Life of this patent
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Abstract
The invention relates to a polymeric film composed of an optically anisotropic material made from a cross-linked synthetic resin composition comprising a polymer network, being obtainable by copolymerization of a mixture comprising (a) at least one monomer or oligomer, each of said monomers or oligomers having at least two polymerizable functional groups selected from the group consisting of (meth-)acrylate ester, epoxy and vinyl ether, (b) at least one achiral liquid crystalline monomer or oligomer, each of said monomers/oligomers having mesogenic groups and one polymerizable functional group selected from the group consisting of (meth-)acrylate ester, epoxy and vinyl ether.
Claims13
A polymeric film composed of an optically anisotropic material made from a cross-linked synthetic resin composition comprising a polymer network, being obtainable by copolymerization of a mixture comprising
- (a) at least one monomer or oligomer, each of said monomers or oligomers having at least two polymerizable functional groups selected from the group consisting of (meth)-acrylate ester, epoxy and vinyl ether,
- (b) at least one achiral liquid crystalline monomer or oligomer, each of said monomers or oligomers having mesogenic groups and one polymerizable functional group selected from the group consisting of (meth-)acrylate ester, epoxy and vinyl ether,
- (c) a photoinitiator,
- (d) optionally inhibitors or accelerators,
- (e) optionally at least one chiral component, and
- (f) at least one mono- or dithiol compound.
A polymerizable mixture comprising
- (a) at least one monomer or oligomer, each of said monomers or oligomers having at least two polymerizable functional groups selected from the group consisting of (meth)-acrylate ester, epoxy and vinyl ether,
- (b) at least one achiral liquid crystalline monomer or oligomer, each of said monomers or oligomers having mesogenic groups and one polymerizable functional group selected from the group consisting of (meth-)acrylate ester, epoxy and vinyl ether,
- (c) a photoinitiator,
- (d) optionally inhibitors or accelerators,
- (e) optionally at least one chiral component, and
- (f) at least one mono- or dithiol compound.
Dependencies are inferred from the claim text.