Photochromic photosensitive compositions
US4693962A · kind A · utility
8Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1985 |
| Grant date | Sep 15, 1987 |
| Priority date | — |
| Expiry date | Dec 9, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/163
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A photochromic photosensitive composition comprising a indolinobenzothipyran-based spiropyran compound, a transparent, high molecular weight film forming resin, and a compound represented by the general formula (I): ##STR1## wherein R.sub.1, R.sub.3, R.sub.4 and R.sub.6 each represents a hydrogen atom, a halogen atom or a hydroxyl group, R.sub.2 and R.sub.5 each represents a hydrogen atom or a hydroxyl group, and X represents --NH--, --S--, ##STR2## (where R.sub.7 and R.sub.8 each represents a hydrogen atom, --CH.sub.3, --C.sub.2 H.sub.5, --CH.sub.2 CH.sub.2 COOH or ##STR3##
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.