专利名称：PROCESS FOR THE PREPARATION OF
DISAZO PIGMENTS AND DISAZO PIGMENTSPREPARED BY THE PROCESS
发明人：KIKUCHI, YOSHIMI,SUGAMO, HITOSHI申请号：EP97903606申请日：19970226公开号：EP0826742A4公开日：19991103
摘要：In the method of manufacturing a disazo pigment according to the presentinvention, a superior coupling reaction rate during the coupling reaction process makes itpossible to manufacture a disazo pigment having superior transparency, brightness, colorstrength and gloss for the case in which a color strength agent is used. In this method, acoupling reaction is carried out while continuously feeding a coupler aqueous solutioncomprising a coupler component having the general formula (I) shown below and atetrazo aqueous solution comprising a benzidine derivative tetrazo component at amolar ratio of 2 : 0.8 ∼ 0.99 into an acidic aqueous solution held in a batch type mixingvessel. (where each of X, Y, Z independently represents H, CH, OCH, Cl)
申请人：TOYO INK MANUFACTURING CO., LTD.
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