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西德西格尔(Siegle)公司专利1,098,124号。这种顔料能将塑料着色成带綠光或紅光的黄色,它具有高度的着色力和良好的日晒坚牢度,以4:4′二氨基3:3:5:5四氯二苯基重氮化后,与乙酰醋酸苯胺或其衍生物偶合而制得,偶合pH值选擇在3～3.5。例如,94份4:4′二氨基3:3:5:5四氯二苯基用通常重氮化方法重氮化后,加入116份乙酰醋酸磷甲氧基苯胺的悬浮液中而进行偶合,溫度維持在18～20℃,pH值在3～3.5,偶合完毕后再攪拌一小时使成游离状,在烘燥
Siegle Corporation Patent No. 1,098,124. The pigment pigmented plastic into yellow with green or red, it has a high degree of tinting strength and good fastness to sunlight, 4: 4 ’diamino 3: 3: 5: 5 tetrachlorodibenzo After diazotization, coupled with acetoacetic acid aniline or derivative thereof, the coupling pH is selected at 3 ~ 3.5. For example, 94 parts of a 4: 4 ’diamino 3: 3: 5: 5 tetrachlorodiphenyl group are diazotized by a conventional diazotization method and then coupled to a suspension of 116 parts of phosphinomethoxyanisole acetoacetate , The temperature is maintained at 18 ~ 20 ℃, pH value of 3 ~ 3.5, after the coupling was stirred for another hour to make a free form, in the drying