发明名称 |
Preparation of beta quinacridone pigments |
摘要 |
A novel method for the preparation of a beta quinacridone pigment is described by the oxidation of 6,13-dihydroquinacridone in the presence of polyvinyl pyrrolidone, a catalyst and optionally a particulate quinacridone or particle growth inhibitor using hydrogen peroxide as the oxidant.
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申请公布号 |
US6864371(B2) |
申请公布日期 |
2005.03.08 |
申请号 |
US20030714269 |
申请日期 |
2003.11.14 |
申请人 |
CIBA SPECIALTY CHEMICALS CORPORATION |
发明人 |
BAEBLER FRIDOLIN |
分类号 |
C09B48/00;(IPC1-7):C07D471/04;C07D471/06 |
主分类号 |
C09B48/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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