溶性アゾ・不溶性アゾ系顔料

摘要

アゾ顔料は，印刷インキを中心に幅広い用途で使用されている顔料で，構造により溶性アゾ・不溶性アゾ・縮合アゾ顔料に分 類される。溶性・不溶性アゾ顔料は，おもに黄～赤の色調を示し，高着色力で鮮明性に優れ，その使用量は有機顔料全需要量 の半分以上を占める。本稿では溶性・不溶性アゾ顔料の製法・特性・構造別各論について説明する。さらに，溶性・不溶性ア ゾ顔料の大きな弱点である耐光性を向上させた縮合アゾ顔料についても補足説明する。%Azo pigments are used in a wide variety of applications, especially for printing inks. They are classified into soluble azo, insoluble azo and condensation azo pigments by chemical structure. Soluble and insoluble azo piments give color shade from yellowish to reddish, high color strength and excellent vividness. Their consumption occupies more than half of the whole organic pigment demand. In the present review the manufacturing process, property and detail of each structure are described.Furthermore, condensation azo pigments, which are characterized by excellent light fastness compared to the soluble and inisoluble types, are also covered.