High refractive index and optically clear copoly (carbosilane and siloxane) elastomers
AssigneeStaar Surgical Company, Inc.
InventorXiugao Liao
Life of this patent
Estimating the term…
Abstract
High refractive index and optically clear copoly(carbosilane and siloxane) elastomers and ophthalmic lenses made therefrom are provided. The elastomers are comprised of copolymers having carbosilane repeat units and siloxane repeat units. The copolymers and ophthalmic lenses of the present invention have a high refractive index and excellent folding recoverability.
Claims25
An ophthalmic lens formed from a copoly(carbosilane and siloxane) elastomer comprising:
- a copolymer having carbosilane repeat units and siloxane repeat units.
An ophthalmic lens formed from a copoly(carbosilane and siloxane) elastomer comprising:
- a copolymer having carbosilane repeat units and siloxane repeat units, the carbosilane repeat units each having a carbon chain with 2 to 12 carbon atoms and the siloxane repeat units each being independently selected from the group consisting of dimethylsiloxane and diphenylsiloxane;
- a platinum catalyst;
- a crosslinking agent that is a hydrodimethyl-terminated silicone;
- a filler that is hexamethyldisilozane-treated silica and silicone resin material;
- and
- a UV absorbing compound selected from the group consisting of allyl or methallyl functionalized benzotriazoles or benzophenones.
A copoly(carbosilane and siloxane) elastomer having a high refractive index and optical clarity comprising:
- a copolymer having carbosilane repeat units and siloxane repeat units, the carbosilane repeat units each having a carbon chain with 2 to 12 carbon atoms and the siloxane repeat units each being independently selected from the group consisting of dimethylsiloxane and diphenylsiloxane.
Dependencies are inferred from the claim text.