| 发明名称 |
A photochromic material. |
| 摘要 |
<p>The present invention provides a photochromic material possessing absorption sensitivity in a longer wavelength region when compared with conventional photochromic materials. The photochromic material is a spiropyran compound of formula <CHEM> wherein R is alkyl containing 1 to 30 carbon atoms. o</p> |
| 申请公布号 |
EP0385407(A2) |
申请公布日期 |
1990.09.05 |
| 申请号 |
EP19900103826 |
申请日期 |
1990.02.27 |
| 申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO. LTD. |
发明人 |
HIBINO, JUNICHI;ANDO, EIJI |
| 分类号 |
C07D491/10;C07D491/107;C09K9/02;G03C1/685 |
主分类号 |
C07D491/10 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
|
| 地址 |
|
