发明授权
- 专利标题： Crystal of fluoran compound and preparation process of the crystal
- 专利标题（中）： 氟化合物的晶体和晶体的制备过程
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申请号： US757160申请日： 1991-09-10
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公开(公告)号： US5210221A公开(公告)日： 1993-05-11
- 发明人: Masakatsu Nakatsuka , Atsuo Otsuji , Kiyoharu Hasegawa , Kazuyoshi Kikkawa , Akihiro Yamaguchi
- 申请人： Masakatsu Nakatsuka , Atsuo Otsuji , Kiyoharu Hasegawa , Kazuyoshi Kikkawa , Akihiro Yamaguchi
- 申请人地址： JPX Tokyo
- 专利权人： Mitsui Toatsu Chemicals, Inc.
- 当前专利权人： Mitsui Toatsu Chemicals, Inc.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX2-243713 19900917; JPX2-301073 19901108
- 主分类号： B41M5/145
- IPC分类号： B41M5/145 ; B41M5/327 ; C09B11/24 ; C09B67/48
摘要：
Disclosed are a crystal of a fluoran compound having the formula (I) comprising exhibiting high peaks at diffraction angles (2.theta.) of 7.5.degree. and 17.0.degree. and relatively high peaks at diffraction angles (2.theta.) of 15.1.degree., 19.1.degree., 21.5.degree. and 25.3.degree. in an X-ray diffraction diagram by the Cu-K.alpha. beam and a crystal of a fluoran compound having the formula (II) comprising exhibiting high peaks at diffraction angles (2.theta.) of 5.5.degree. and 19.2.degree. in an X-ray diffraction diagram by the Cu-K.alpha. beam, which is useful as a color forming compound in recording materials. ##STR1##
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