Naphthopyran derivatives, compositions and (co) polymer matrices containing same
US6399791B1 · kind B1 · utility
10Cited by
7References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1999 |
| Grant date | Jun 4, 2002 |
| Priority date | — |
| Expiry date | Jul 20, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C2214/17
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
For subject, the present invention has novel naphthopyran derivatives of formula: optionally substituted in position(s) 2, 3, 4, 6, 7, 8, 9 or/and 10; the substituent Z in position 5 being of formula —C(R1)(R2)(OR3).The invention also relates to compositions and (co)polymer matrices containing such derivatives. Said derivatives have interesting photochromic properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.