Chemical Deposition Coatings from Anionic Polymer Micro-Emulsion onto Anodized Aluminum Plate

In the chemical deposition of anionic emulsion particles of polyacrylic copolmer with the diameter less than 0.1μm, onto the anodized aluminium plate, the effects of medium pH and deposition temperature and the glass temperature (Tg) of base copolymer on the amount (Pd) of polymers deposited were studied. The Pd was increased remarkably with descending pH below pH 2 and was maximum at about 40°C, Below 40°C, Pd was increased with the ascending Tg, whereas above 40°C such a behaviour was not observed. From the scanning electron microscopical observation of coatings surface, it was clarified that there was a definite relationship between the deposition behaviour and the porosity structure of coating layers.