High refractive index ophthalmic device materials
US6353069B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 2000 |
| Grant date | Mar 5, 2002 |
| Priority date | — |
| Expiry date | Mar 24, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B1/043
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
High refractive index copolymers suitable for use in ophthalmic devices are disclosed. The copolymers comprise a) two or more monomers of the structure: wherein: X is H or CH3;m is 0-10;Y is nothing, O, S, or NR wherein R is H, CH3, CnH2n+1(n=1-10), iso-OC3H7, C6H5, or CH2C6H5;Ar is any aromatic ring which can be unsubstituted or substituted with H, CH3, C2H5, n-C3H7, iso-C3H7, OCH3, C6H11, Cl, Br, C6H5, or CH2C6H5;a crosslinking monomer having a plurality of polymerizable ethylenically unsaturated groups, andb) a total of about 5 mole % or less of one or more monomers of the structure: wherein: X is H or CH3;W is —CH3 or (CH2═C(—X)—C(═O)—); andn is such that the weight average molecular weight is approximately 600-1000 if W is —CH3 and approximately 400-1000 if W is (CH2═C(—X)—C(═O)—).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.