Water soluble photochromic compounds, compositions and optical elements comprising the compounds
US6080338A · kind A · utility
45Cited by
3References
18Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 5, 1999 |
| Grant date | Jun 27, 2000 |
| Priority date | — |
| Expiry date | Mar 5, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K9/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Described are novel water soluble photochromic naphthopyran and benzopyran compounds having an alkylaminoalkylamino group on the pyran portion or on the pyran portion and the naphtho- or benzo-portion thereof. These compounds may be represented by one of the following graphic formula: ##STR1## wherein B and/or B' is an alkylaminoalkylamino-substituted aryl group and R.sub.1 may also be an alkylaminoalkylamino group. Articles such as ophthalmic lenses or other plastic transparencies and coating compositions such as paints and inks that incorporate the novel water soluble compounds are also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.