Naphthopyrans and phenanthropyrans annelated in C5-C6 with a bicyclic group, and compositions and (co) polymer matrices containing them
US6444860B1 · kind B1 · utility
1Cited by
15References
12Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 2000 |
| Grant date | Sep 3, 2002 |
| Priority date | — |
| Expiry date | Dec 29, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/23
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to novel naphthopyran- and phenanthropyran-type compounds having a carbobicycle annelated in 5,6- position. These compounds have formula (I) given below: These compounds (I) have interesting photochromic properties. The invention also relates to their preparation, to their applications as photochromes, as well as to the compositions and (co)polymer matrices containing them.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.