两种钴蓝颜料在聚烯烃色母粒中的应用研究

通过X射线光电子能谱仪、X射线衍射仪及扫描电镜对钴蓝颜料元素种类及含量、结晶性能、颜料粒子形貌及分布的研究,了解两种钴蓝颜料的微观差异;将两种钴蓝颜料应用于色母粒,采用积分球式测色仪、显微镜和熔体流动速率仪,分析了色母粒及其着色制品的着色力、分散性能、遮盖性能及色母粒的加工流动性能差异。结果表明,恰当的钴铝含量可以使钴蓝颜料在制品中有良好的着色效果;颜料表面元素中碳含量高有利于颜料在塑料中的分散,制备的色母粒加工流动性能更好;原生粒子小的钴蓝颜料充分分散后其着色效果比原生粒子大的更好;而对于40%钴蓝颜料含量的色母粒,采用5%的蜡作为分散剂,可以达到很好的分散效果。

Study on Two Types of Cobalt Blue Pigment for the Application of Polyolefin Masterbatch

The types of elements,crystallinity,particle morphology and distribution of cobalt blue pigment were investigated through X-ray photoelectron spectroscopy,X-ray diffraction and scanning electron microscopy,the microscopic differences of the two cobalt blue pigments were discovered.The two types of cobalt blue pigment were used for preparing color masterbatch,and the tinting strength,dispersion,covering properties,processing performance of the masterbatches and their products were studied by color measurement instrument,microscope and the melt flow index apparatus.The results showed that the appropriate content of aluminum and cobalt gave a good color performance to the products;the high content of carbon in the surface of the pigment was useful for the dispersion in the products;at the same time,it possessed a good processing performance.When the pigment was fully dispersed,the smaller primary particles demonstrated a better tinting strength than the bigger ones.As for the 40% color masterbatch,the 5% wax could give a good dispersion in the product.