发明授权
- 专利标题： Flavanthrone pigment
- 专利标题（中）： 黄烷酮色素
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申请号： US37024173申请日： 1973-06-15
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公开(公告)号： US3898233A公开(公告)日： 1975-08-05
- 发明人: BACHMANN WILLIAM E , FLATT THOMAS R
- 申请人： ALLIED CHEM
- 专利权人： Allied Corp
- 当前专利权人： Allied Corp
- 优先权： US37024173 1973-06-15
- 主分类号： C09B5/22
- IPC分类号： C09B5/22 ; C09B5/20 ; C09B67/48
摘要：
A new crystalline polymorphic form of flavanthrone is disclosed. This new form exhibits only one prominent X-ray diffraction peak between 7.00 and 8.00 dA and only two prominent peaks between 3.30 and 3.75 dA. In contrast to the known form of flavanthrone, the new form exhibits desirable transparent mass tones when employed as a pigment.
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