发明名称 |
Method for producing a liquid formulation of salts of sulphonic-acid azo dyes |
摘要 |
A process for producing a liquid formulation of salts of sulfonated azo dyes by coupling an at least equimolar amount of diazotized aminoarylsulfonic acids I H2N—Ar—SO3H  (I), where Ar is phenylene (which may be monosubstituted by sulfo) or naphthylene (which may be mono- or disubstituted by sulfo and/or monosubstituted by hydroxyl) onto the coupling product of an unsubstituted or methyl-substituted phenylenediamine with itself comprises dissolving the azo dye in a basic medium and then subjecting the solution to a nanofiltration.
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申请公布号 |
US7847073(B2) |
申请公布日期 |
2010.12.07 |
申请号 |
US20050569263 |
申请日期 |
2005.05.18 |
申请人 |
BASF AKTIENGESELLSCHAFT |
发明人 |
SCHROEDER GUNTER-RUDOLF;DECKER JUERGEN;REICHELT HELMUT;KLOPP INGO;DIEFENBACHER ARMIN;VOSS HARTWIG |
分类号 |
C09B41/00;C09B35/38;C09B35/42;C09B35/52;C09B37/00;C09B67/26;C09B67/54 |
主分类号 |
C09B41/00 |
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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