发明名称 |
PROCESS FOR PREPARING A SUBSTANTIALLY PURE GAMMA PHASE QUINACRIDONE PIGMENT OF LARGE PARTICLE SIZE |
摘要 |
An improved process for producing a substantially pure gamma phase a quinacridone pigment or pigment derivative involving preparing an aqueous slurry of a crude quinacridone in the presence of caustic alkali and a non-polar, water immiscible solvent; and heating said slurry at a temperature above about 120° C. |
申请公布号 |
US2002073896(A1) |
申请公布日期 |
2002.06.20 |
申请号 |
US20000741389 |
申请日期 |
2000.12.20 |
申请人 |
SUNG EDWARD H.;ROBERTSON GEORGE H.;VELASQUEZ HUMBERTO |
发明人 |
SUNG EDWARD H.;ROBERTSON GEORGE H.;VELASQUEZ HUMBERTO |
分类号 |
C07D471/04;C09B48/00;C09B67/52;(IPC1-7):C09B48/00 |
主分类号 |
C07D471/04 |
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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