发明授权
- 专利标题： Photochromatic composition and photochromatic articles which contain it
- 专利标题（中）： 含有色素的组合物和光色产品
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申请号： US650035申请日： 1991-02-04
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公开(公告)号： US5180524A公开(公告)日： 1993-01-19
- 发明人: Nicola Casilli , Luciana Crisci , Fiorenzo Renzi , Franco Rivetti
- 申请人： Nicola Casilli , Luciana Crisci , Fiorenzo Renzi , Franco Rivetti
- 申请人地址： ITX Palermo
- 专利权人： Enichem Synthesis S.p.A.
- 当前专利权人： Enichem Synthesis S.p.A.
- 当前专利权人地址： ITX Palermo
- 优先权： ITX22528A/87 19871105
- 主分类号： G03C1/685
- IPC分类号： G03C1/685
摘要：
A photochromatic composition contains at least two photochromatic compounds, defined by the general formula: ##STR1## wherein the various substituents from R.sub.1 to R.sub.7 and X are as defined in the specification.In such a mixture, at least one photochromatic compound is defined by the general formula, wherein R.sub.7 represents a hydrogen atom, and at least one further compound is also defined by the general formula, wherein R.sub.7 represents an -NR.sub.8 R.sub.9, with R.sub.8 and R.sub.9 having the meaning as defined in the text.
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