Photochromic compounds and photosensitive compositions containing the compounds
US4565779A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 23, 1983 |
| Grant date | Jan 21, 1986 |
| Priority date | — |
| Expiry date | Dec 23, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/163
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Novel photochromic compounds are disclosed, which compounds are represented by the general formula ##STR1## in which R.sub.1 represents an alkyl group having 1 to 20 carbon atoms, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 independently represent an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, a halogen atom, a nitro group, a cyano group or a dimethylamino group, and R.sub.6, R.sub.7 and R.sub.8 independently represent a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, or a halogen atom, and correspondingly 97 to 50 wt % of a film-forming polymer. Photosensitive compositions and materials comprising the compounds are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.