Abstract: Phthalocyanine blue pigments were prepared by condensation reaction with ammonium chloride as acidic additive, based on phthalic anhydride-urea process. Effects of acidic additives on the yield and quality of phthalocyanine blue pigmengt, its dispersion and stability in water-based systems were discussed. The optimal reaction conditions were obtained: when ammonium chloride was used as the acidic additive, 25%(molar fraction) of phthalic anhydride was added, the yield of the pigment reached to 98%. The obtained pigment was featured by its loose particles, bright shade, easily dispersed in water-based systems, with small and uniform particle size in colorants and better storage stability.

Key words: phthalocyanine blue, improved synthesis waterborne, acidic additives, ammonium chloride

摘要： 在苯酐-尿素法基础上，采用氯化铵作为酸性助剂参与缩合反应工艺，制备酞菁蓝颜料。讨论了酸性助剂对酞菁蓝颜料的收率、质量及其在水基体系中的分散性、分散稳定性的影响。 优化的缩合反应条件为:以氯化铵作为酸性助剂，苯酐的加入量为 25%(摩尔分数)，所得颜料的收率可达到98%，且颗粒疏松，色光鲜艳;同时该颜料在水基体系中更易研磨分散，颜料色浆颗粒细小且粒径分布均匀，贮存稳定性较优。

关键词: 酞菁蓝, 合成改进, 水性, 酸性助剂, 氯化铵