Photochromic materials
US8518305B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 26, 2010 |
| Grant date | Aug 27, 2013 |
| Priority date | — |
| Expiry date | Apr 29, 2031 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2211/1088
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention relates to photochromic materials that include a photochromic compound that includes a photochromic substituent (e.g., an indeno-fused naphthopyran) and at least one pendent silane group, which is bonded to the photochromic substituent. The pendent silane groups are selected from certain pendent siloxy-silane groups and/or pendent alkoxy-silane groups represented by general formulas (I) and/or (II) as described in further detail herein. The present invention also relates to photochromic articles, such as photochromic optical elements (e.g., photochromic lenses), and photochromic coating compositions (e.g., curable photochromic coating compositions), that include the photochromic materials of the present invention. The photochromic materials of the present invention have improved compatibility with compositions into which they may be incorporated, for example, coating compositions, such as urethane coating compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.