Photochrome alkyl substituted spiroindoline compounds
US5399687A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 15, 1993 |
| Grant date | Mar 21, 1995 |
| Priority date | — |
| Expiry date | Dec 15, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/685
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A compound is described with the general formula ##STR1## where R.sup.1 is one to four substituted groups from the series --Z, --OZ, --NZ.sub.2, --NHZ, NH.sub.2, CN, CF.sub.3 with Z: C.sub.1 -C.sub.5 alkyl, phenyl, pyridyl, benzyl PA1 R.sub.2 =--H, --Z, --CH.sub.2 Z, PA1 R.sub.3,R.sub.4,R.sub.5 =--NH.sub.2, --NHZ, --NZ.sub.2, --OZ, --Z, --H PA1 R.sub.6 =--H, --Z, --OZ, --CN, --NO.sub.2 PA1 HAr=heteroaromatic substances with two or three cores and with 1 or 2N atoms in accordance with one of the following structural formulae: ##STR2## The compounds in accordance with this invention have the advantage that their migration in plastic materials usually used for spectacle lenses is lower so that no softening agent effect occurs which would be of a disadvantage for the coating of such lenses with, for example, anti-reflection coating layers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.