Effects of fumed nanopowders on properties of polyester powder coating
[Introduction]The fumed nanopowders prepared by pyrolysis can be used as dispersing agents for powder paints.[Method]The effects of fumed silica and fumed alumina on the fluidity,transfer efficiency,and storage stability of polyester powder paint and the hardness,adhesion,and glossiness of its coating were studied.[Result]Adding 0.1%to 0.3%by mass of hydrophobically modified fumed silica significantly improved the fluidity and storage stability of polyester powder paint,slightly improved its transfer efficiency as well as the hardness and adhesion of its coating,but had a certain delustering effect on the coating.Adding 0.1%to 0.2%by mass of fumed alumina significantly improved the transfer efficiency of polyester powder paint,slightly improved its fluidity and storage property as well as the hardness and adhesion of its coating,but had little effect on the gloss of the coating.[Conclusion]The combination of hydrophobic fumed silica and fumed alumina can provide better performance for powder paints.
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