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Study on the synthesis and properties of polyketene azo pigment

FU Zhong,ZHOU Yun-you (Colle.of Chem.& Mate.Sci.,Anhui Normal University,Wuhu 241000,China)  
Polyketene(PVK) was synthesized by oxidation reaction using nontoxic substance polyvinyl alcohol(PVA)as material and H2O2 as oxidant under suitable conditions.Appropriate aromatic amines were diazotized and coupled with the active methylene of the PVK to give a group of yellow pigments,which have the similar properties with Hansan Yellow dye.The reaction conditions(time,temperature and so on) of the diazotization and coupling were investigated and optimized.
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