发明公开
- 专利标题： PROCESS FOR THE PREPARATION OF DISAZO PIGMENTS AND DISAZO PIGMENTS PREPARED BY THE PROCESS
- 专利标题（中）： 用于生产偶氮及如此制造颜料
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申请号： EP97903606申请日： 1997-02-26
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公开(公告)号： EP0826742A4公开(公告)日： 1999-11-03
- 发明人: KIKUCHI YOSHIMI , SUGAMO HITOSHI
- 申请人： TOYO INK MFG CO
- 专利权人： TOYO INK MFG CO
- 当前专利权人： TOYO INK MFG CO
- 优先权： JP3765396 1996-02-26; JP3765496 1996-02-26
- 主分类号： C09B35/10
- IPC分类号： C09B35/10 ; C09B41/00
摘要：
A process for the preparation of disazo pigments by which coupling can be attained in an enhanced conversion; and disazo pigments prepared by this process and excellent in transparency, sharpness, staining power and gloss. This process is characterized by continuously pouring an aqueous solution containing a coupler component of the general formula (I) and an aqueous solution of a tetrazo component derived from a benzidine into an aqueous acid solution put in a batch-wise agitated tank at a mole ratio of the coupler to the tetrazo component of 2 : 0.8 to 0.99 to conduct coupling: formula (I), wherein X, Y and Z are each independently H, CH3, OCH3 or C1.
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