High refractive index thermoplastic polyphosphonates
US6653439B2 · kind B2 · utility
2Cited by
1References
7Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jun 22, 2001 |
| Grant date | Nov 25, 2003 |
| Priority date | — |
| Expiry date | Jun 22, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G79/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
High refractive index, melt processable polyphosphonates and methods for preparing the same are provided. These polymers are particularly useful for optical and ophthalmic parts, such as lenses. A method of preparing optical and ophthalmic lenses by injection molding the polymers of the present invention into the form of the optical or ophthalmic lenses is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.