发明授权
US06426023B1 Benzopyrans annelated in C7-C8 with an aromatic heterocycle and compositions and (CO)polymer matrices containing them
失效
苯并吡喃在C7-C8中与芳族杂环和含有它们的组合物和（CO）聚合物基质结合
- 专利标题： Benzopyrans annelated in C7-C8 with an aromatic heterocycle and compositions and (CO)polymer matrices containing them
- 专利标题（中）： 苯并吡喃在C7-C8中与芳族杂环和含有它们的组合物和（CO）聚合物基质结合
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申请号： US09590000申请日： 2000-06-08
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公开(公告)号： US06426023B1公开(公告)日： 2002-07-30
- 发明人: Olivier Breyne , You-Ping Chan , Patrick Jean
- 申请人： Olivier Breyne , You-Ping Chan , Patrick Jean
- 优先权： FR9907355 19990610
- 主分类号： G02B523
- IPC分类号： G02B523
摘要：
The invention relates to novel benzopyran-type compounds having an aromatic heterocycle annelated in position 7,8 and a carbocycle annelated in position 5,6. These compounds have the formula (I) given below: These compounds (I) have interesting photochromic properties. The invention also relates to their preparation, to their applications as photochromes, as well as to the compositions and (co)polymer matrices containing them.
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