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AEROSIL® and AEROXIDE® fumed metal oxides for powder coatings

The global market for powder coatings is expected to grow at rates higher than liquid coatings due to the ongoing shift from conventional solvent-borne to more environmentally- friendly coating systems. AEROSIL® fumed silica and AEROXIDE® fumed oxides are well known for enhancing and optimizing manufacturing, quality, appearance and overall performance of powder coatings.
AEROSIL® fumed silica improves free flow characteristics:

AEROSIL_Powder-coatings
Right: Powder coating without AEROSIL® fumed silica, Left: Powder coating with AEROSIL® R 972
While AEROXIDE® Alu C, AEROSIL® 200, AEROSIL® R 812 are well known for their excellent suitability in enhancing the desired properties of powder coatings, studies have shown that recent developments such as AEROXIDE® Alu C 805 and AEROXIDE® Alu 130 offer additional benefits in the tested systems. Consistent improvement was demonstrated in powder coatings treated with hydrophobic aluminium oxide AEROXIDE® Alu C 805, and it proved to be a very efficient additive to improve the flow behavior in fine and coarse powder coatings as well. Focusing on the tribo application, the transfer efficiency of AEROXIDE® Alu C 805 was superior in both fine and coarse powders while the Faraday Cage Effect was overcome especially in coarse materials. Due to its hydrophobic character AEROXIDE® Alu C 805 reduces moisture pick-up and enhances storage stability. For the specific system used for this study it can be concluded that AEROXIDE® Alu C 805 and AEROSIL® R 812 showed the best overall results and can therefore be considered the most suitable additives for both, coarse and fine particle size powders.
More products by Evonik for paints and coatings: