Photochromic compound and articles containing the same
US4792224A · kind A · utility
33Cited by
7References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 14, 1987 |
| Grant date | Dec 20, 1988 |
| Priority date | — |
| Expiry date | May 14, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D498/20
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Described are photochromic spiro (oxazolidine) substituted benzoxazine photochromic compounds and their use in plastic hosts to impart a photochromic response thereto. More particularly, there are described spiro (oxazolidine) pyrido benzoxazine and spiro (oxazolidine) naphthoxazine compounds and their use in substrates such as polymerizates of allyl digylcol carbonate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.