Spirooxazine photochromic compounds
US5017698A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 1989 |
| Grant date | May 21, 1991 |
| Priority date | — |
| Expiry date | May 26, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/685
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Disclosed herein is a photochromic compound comprising a spirooxazine compound represented by the following general formula (I): ##STR1## wherein R.sup.1 means an alkyl, allyl or alkoxyalkyl group, or a substituted or unsubstituted aralkyl or aryloxyalkyl group, R.sup.2 and R.sup.3 individually denote a substituted or unsubstituted alkyl group, R.sup.4, R.sup.5, R.sup.6 and R.sup.7 stand individually for a hydrogen or halogen atom, or an alkyl, alkoxy, hydroxy, alkoxyalkyl, or substituted or unsubstituted amino group. A photochromic composition comprising the photochromic compound and a phenol derivative, fluorine-containing alcohol or hindered amine type light stabilizer is also disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.