High refractive index aromatic-based siloxane monofunctional macromonomers
View Patent ↗Optically transparent, relatively high refractive index polymeric compositions and ophthalmic devices such as intraocular lenses, corneal inlays and contact lenses made therefrom are described herein. The preferred polymeric compositions are produced through the polymerization of one or more aromatic-based siloxane macromonomers or the copolymerization of one or more aromatic-based siloxane macromonomers with one or more non-siloxy aromatic-based monomers, non-aromatic-based hydrophobic monomers or non-aromatic-based hydrophilic monomers.
1. A method of producing aromatic-based siloxane macromonomers
wherein the R groups may be the same or different aromatic-based substituents; R 1 is an aromatic-based substituent or an alkyl; x is a non-negative integer; and y is a natural number, comprising:
polymerizing a hydride functionalized cyclic siloxane with a methacrylate-capped disiloxane to form a hydride containing siloxane; and
hydrosilylizing with a catalyst and an allylic-functionalized aromatic, said hydride containing siloxane.
2. The method of claim 1 wherein said R groups may be the same or different aromatic-based substituents selected from the group consisting of
3. The method of claim 1 wherein said R 1 groups may be the same or different aromatic-based substituents or alkyl substituents.
4. The method of claim 1 wherein said R 1 groups may be the same or different C 6-30 aromatic-based substituents or C 1-4 alkyl substituents.