| abstract |
The present invention relates to photochromic materials comprising a photochromic substituent (for example, an indeno-fused naphthopyran) and at least one pendant silane group bonded to the photochromic substituent. Photochromic compounds. The pendant silane groups are selected from certain pendant siloxy-silane groups and/or pendant alkoxysilane groups represented by general formulas (I) and/or (II) 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), which include the photochromic compositions of the present invention. Chromogenic material. The photochromic materials of the present invention have improved compatibility with compositions into which they are incorporated, for example coating compositions, such as polyurethane coating compositions. |