Photochromic compounds and their use in photoreactive lenses
US4576766A · kind A · utility
67Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 7, 1983 |
| Grant date | Mar 18, 1986 |
| Priority date | — |
| Expiry date | Sep 7, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/0008
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method is disclosed for manufacturing transparent plastic articles, primarily plano or opthalmic photoreactive lenses, which comprises incorporating fulgides or fulgimides containing an adamantylidene group in plastics casting or moulding compositions or preformed plastics articles and converting the fulgide or fulgimide in situ into a form in which it confers on the article the property of darkening in the presence of sunlight and fading in its absence.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.