Abstract
Organosilicone paints were prepared by mixing as-synthesized silicone resin, pigments, fillers and other additives. Through scraping and baking, the thick film coating on the treated aluminum alloy was obtained. The optimum range of P/B (weight ratio of the pigment/binder) was determined to be 0.75:1 by investigating the influence of the P/B on the liquidity and thickness of the coating, indicating that the thickness of the coating reached 500μm. When mica powder, talc powder, nanometer titanium dioxide, sub-micron titanium dioxide, sphere silicon fine powder and lipophilic silica content were 15 wt%, 15wt%, 15wt%, 10wt%, 20wt% and 3 wt % of solid mass of silicone resin, respectively, the coating had good gloss and no holes were occurred on the surface. And there were no bubbles or shrinkage cavities in the obtained coating when the leveling agent S43, defoamer 900 and dispersant 670 content were 0.7 wt%, 0.1wt% and 0.3wt% of the total mass of paint, respectively.
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