Photochromic compositions, preparation thereof and articles made therefrom or coated therewith
US7261842B2 · kind B2 · utility
8Cited by
9References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 21, 2003 |
| Grant date | Aug 28, 2007 |
| Priority date | — |
| Expiry date | May 28, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03C1/685
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention relates to novel cross-linkable or crosslinked photochromic compositions, articles made from or coated with the compositions and method of making the compositions. The compositions contain (i) at least one segmented or non-segmented polyurethane-type or polyurethane-urea-type linear polymer having at least one non-terminal moiety that comprises at least one unsaturated group; and (ii) an effective amount of at least one photochromic organic compound, advantageously selected from spiroxazines, chromenes, spiropyrans fulgides and fulgimides.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.