Photochromic compositions and light transmissible articles
US7247262B2 · kind B2 · utility
30Cited by
9References
36Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 3, 2005 |
| Grant date | Jul 24, 2007 |
| Priority date | — |
| Expiry date | May 3, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2211/1048
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention related to a photochromic polymeric composition comprising a polymer matrix and a photochromic compound which is an adduct comprising a photochromic moiety and at least one pendant oligomer group to provide a rate of fade of the photochromic polymeric composition which is significantly changed when compared with the corresponding composition comprising the photochromic compound without said pendent oligomer. The invention also relates to a photochromic compound which is an adduct comprising a photochromic moiety and at least one pendent oligomer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.