Flash Aluminum Pigment Preparation, Modification And Its Application

The flash aluminum flake pigment is an important metallic pigment. The paper research on the specialties of flaking aluminum pigment, discussed the related effect factors on the shape of aluminum flake which were prepared by rod mill. The results showed that aluminum pigments having good particle morphologies and narrow range of particle size distribution which could be prepared only by controlling conditions properly. The optimum operating condition is that the initial particle shape of aluminum powder is ball, the mill is backfilled with 58-60 rods, the milling time is about 4-6 hours, and wherein isopropanol is used as grinding agent and stearic acid as grinding aid.It could be seen from the photo of SEM that the thickness of the aluminum particles which we made is hard to be curlied .So the flash aluminum flake pigment also has high ratio of cover power which is tested by the experiment of water surface covering power.It is being discussed that the effect of different couple-agents modifying aluminum flake pigment. We found that the γ-APS couple-agents is the best one and when the weight ratio of couple-agents:water:ethanol is l:2:30,the modified aluminum pigment get better dispersion stability in water than unmodified one. Then the enhance performance of the aluminum powder resistance to erode and to high temperature which have made by dealing the aluminum pigment with high temperature. The modified aluminum pigment was characterized by Scanning Electron Microscopy (SEM), Energy Spectrum instrument (EDS) and XPS. The results showed that the modified aluminum flakes are encapsulated by silane coupling agent and Al-O-Si bond was formed in the surface of the particles .It turned to be water-inert and hydrophilic after aluminum pigment modified which have validate by the gassing stability experiments.The paper also researched the method of preparing the golden flash aluminum flake pigment which is made from the flash aluminum flake pigment coated by PMMA.