发明名称 |
PROCESS FOR PRODUCING N-METHYLATED ORGANIC PIGMENTS |
摘要 |
A process for producing an organic pigment represented by the general formula (I): A(H)x(CH3)y, characterized in that an organic pigment represented by the formula (II): A(H)x+y, is reacted with dimethylcarbonate in the presence of a base with or without a solvent, wherein in formulae (I and II) x + y is an integer 1 to 4 with x being 0 to 4 and y being 1 to 4, A is the residue of an organic pigment containing x + y cyclic or open -NH- groups, and the H as well as CH3 in formula (I and II) are bound to the above mentioned N. This process is suitable for the production of N-methylated organic pigments in an environmentally safe process and at a low production cost. |
申请公布号 |
WO9608537(A1) |
申请公布日期 |
1996.03.21 |
申请号 |
WO1995EP03462 |
申请日期 |
1995.09.02 |
申请人 |
CIBA-GEIGY AG;ZAMBOUNIS, JOHN;BIZE, ALINE |
发明人 |
ZAMBOUNIS, JOHN;BIZE, ALINE |
分类号 |
C09B48/00;C09B57/00;C09B57/04;C09B67/22;C09B69/00 |
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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