发明授权
- 专利标题： Diaryl-2H-naphthopyrans
- 专利标题（中）： 二芳基-2H-萘并吡喃
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申请号： US09447233申请日： 1999-11-23
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公开(公告)号： US06190580B1公开(公告)日： 2001-02-20
- 发明人: Manfred Melzig , Herbert Zinner
- 申请人： Manfred Melzig , Herbert Zinner
- 优先权： DE4424351 19940711
- 主分类号： G02B523
- IPC分类号： G02B523
摘要：
Photochromic diaryl-2H-naphthopyran structures, which dye photochromically well at room temperature, lighten up quickly when incorporated into ophthalmic lenses, possess longevity, and due to their special structure, have a reduced tendency of the molecules to migrate in plastics.
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