Naphthopyrans annelated in C5-C6 with an indene- or dihydronaphthalene-type carbocycle, and compositions and (co)polymer matrices containing them
US6506322B1 · kind B1 · utility
11Cited by
20References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 14, 2000 |
| Grant date | Jan 14, 2003 |
| Priority date | — |
| Expiry date | Jan 22, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D311/94
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to novel naphthopyran-type compounds, annelated in position C5-C6 by an indene- or dihydronaphthalene-type carbocycle, which are of the formulae (I) and (II) given below: These compounds (I) and (II) 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.