发明名称 |
Photochromic materials having electron-withdrawing substituents |
摘要 |
Photochromic materials comprising indeno-fused naphthopyrans having a first electron-withdrawing substituent and, in certain non-limiting embodiments, a second electron-withdrawing substituent are disclosed. The photochromic materials according to the various embodiments may display faster fade rates, bathochromic shift, and higher performance ratings compared to comparable indeno-fused naphthopyrans without the electron-withdrawing substituents. Photochromic compositions and articles, such as optical elements, incorporating the photochromic materials are also disclosed. |
申请公布号 |
ZA200804782(B) |
申请公布日期 |
2009.10.28 |
申请号 |
ZA20080004782 |
申请日期 |
2008.06.02 |
申请人 |
TRANSITIONS OPTICAL, INC. |
发明人 |
CHOPRA, ANU;KIM, BEON-KYU;VAN GEMERT, BARRY |
分类号 |
C07D;C09K;G02B;G03C |
主分类号 |
C07D |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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