[Pyrrole]naphthopyranes, their preparation, and compositions and (co)polymer matrices containing them
US6203729A · kind A · utility
2Cited by
10References
32Claims
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Inventor
Key dates
| Filing date | Nov 19, 1999 |
| Grant date | Mar 20, 2001 |
| Priority date | — |
| Expiry date | Nov 19, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/23
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed are naphthopyran-type compounds having a pyrrole group annelated in position 5.6, as well as compositions and particularly (co)polymer matrices containing them. These compounds, compositions, and matrices have photochromic properties. These [pyrrole]naphthopyran compounds have the general formula: ##STR1## Articles containing these photochromic compounds, such as ophthalmic and/or solar glasses, lenses, glazing, devices, and the like, are also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.