Naphthopyrans and phenanthropyrans annelated in C5-C6 with a bicycle group and compositions and (co) polymer matrices containing them
US6210608A · kind A · utility
5Cited by
13References
33Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2000 |
| Grant date | Apr 3, 2001 |
| Priority date | — |
| Expiry date | Feb 16, 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: ##STR1## 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.