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US 5,512,609 AGranted
Reinforced compositions and lens bodies made from same
AssigneeAllergan, Inc.
InventorShih-Liang S. Yang
Life of this patent
Estimating the term…
Abstract
Compositions, preferably elastomeric compositions, comprise high refractive index polysiloxane-based cross-linked copolymers and high refractive index polymeric resin components. Such compositions, which have refractive indexes of at least about 1.46, preferably at least about 1.48, are useful in producing foldable intraocular lenses.
Claims20
A lens body for use in or on a mammalian eye comprising:
- in elastomeric composition including a major amount by weight of a cross-linked copolymer component derived from monomers comprising (1) at least one polysiloxane including aryl-containing substituents and (2) a cross-linker component selected from the group consisting of polyorganohydrosiloxanes and mixtures thereof;
- and
- a polymeric resin component selected from the group consisting of silicon-based resins including organic groups and mixtures thereof in an amount effective to increase the strength of said elastomeric composition relative to an identical composition without said polymeric resin component, said lens body being optically clear, said cross-linked copolymer component and said polymeric resin component each having an index of refraction of at least about 1.46, and said lens body being silica-free.
A lens body for use in or on a mammalian eye comprising:
- a composition including a major amount by weight of a cross-linked copolymer component derived from monomers comprising (1) at least one polysiloxane having the formula ##STR6## wherein each R and R.sup.4 is independently selected from alkyl radicals, aryl radicals, cycloalkyl radicals, aralkyl radicals and substituted counterparts thereof, provided that at least one R.sup.4 is an aryl-containing radical, each R.sup.3 is independently selected from monovalent hydrocarbon radicals having a multiple bond and substituted counterparts thereof, n is an integer in the range of about 6 to about 500 or about 1000, and m is an integer in the range of 0 to about 500 or about 1000, and (2) a cross-linker component selected from the group consisting of polyorganohydrosiloxanes and mixtures thereof;
- and
- a polymeric resin component selected from the group consisting of silicon-based resins including organic groups and mixtures thereof in an amount effective to increase the strength of said composition relative to an identical composition without said polymeric resin component, said cross-linked copolymer component having an index of refraction of at least about 1.46, the index of refraction of said polymeric resin component being within about 0.015 of the index of refraction of said cross-linked copolymer component, said composition being silica-free, elastomeric and optically clear.
Dependencies are inferred from the claim text.