Photochromic compositions, photochromic compounds (co)polymer matrices
US6291561A · kind A · utility
4Cited by
1References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2000 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | Feb 14, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B5/23
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The object of the present invention is a photochromic composition incorporating: +2-(p-dimethylaminophenyl)2-(p-methoxyphenyl)-5-methyl-7,9-dimethoxy-[2H]-n aphtho[1,2-b]pyran (compound (I)), and PA1 +3-(p-methoxyphenyl)-3-phenyl-6-morpholino-3H-naphtho-[2,1-b]pyran (compound (II)). The invention also relates to said compounds (I) and (II) per se, (co)polymer matrices containing same, advantageously in a mixture, as well as finished products constituted wholly or in part of such matrices and/or containing one and/or the other of said compounds (I) and (II).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.