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US 8,262,947 B2Granted
UV/visible light absorbers for ophthalmic lens materials
AssigneeNovartis AG
InventorWalter R. Laredo
Life of this patent
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Abstract
Benzotriazole UV/Visible light-absorbing monomers are disclosed. The UV/Vis absorbers are particularly suitable for use in intraocular lens materials.
Claims19
A benzotriazole compound of the formula
- wherein
- X═C3-C4 alkenyl, C3-C4 alkyl, CH2CH2CH2SCH2CH2 or CH2CH2CH2SCH2CH2CH2;
- Y=nothing if X═C3-C4 alkenyl, otherwise
- Y═—O—C(═O)—C(R1)═CH2, —O—C(═O)NHCH2CH2OC(═O)—C(R1)═CH2, or —O—C(═O)NHC(CH3)2(C6H4)C(CH3)═CH2;
- R1═H, CH3, CH2CH3, or CH2OH;
- R2═C1-C4 alkyl;
- and
- R3═H, CH3, CH3O, F, Cl, Br, I, or CF3.
5 more elements
Dependencies are inferred from the claim text.