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US 7,071,279 B2Granted
High refractive index and optically clear copoly (carbosilane and siloxane) elastomers
AssigneeStaar Surgical Company, Inc.
InventorXiugao Liao
Life of this patent
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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.
Claims6
A copoly (carbosilane and siloxane) elastomer having optical clarity comprising:
- a crosslinkable copolymer consisting of 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;
- and
- a crosslinking agent;
- wherein the elastomer has a refractive index of at least 1.43.
1 more element
Dependencies are inferred from the claim text.