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Preparation and characteristics of a waterborne preventive stain coating material with organic-inorganic composites

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Abstract

With the goal of developing a waterborne coating material that prevents staining, organic-inorganic composites prepared from colloidal silica and two types of acrylic resin emulsions were investigated as exterior coatings. conventional acrylic resin emulsion and organic silane hybridized acrylic resin emulsion prepared by emulsion polymerization were mixed with colloidal silica to form organic-inorganic comiposite films. The addition of colloidal silica to emulsions yielded films with higher hydrophilicities, as indicated by lower water contact angles for these films in comparison to films without colloidal silica. The water contact angles of organic silane hybridized acrylic resin emulsion/colloidal silica films were lower than those of acrylic resin emulsion/colloidal silica films. Composite films containing colloidal silica particles smaller than 100 nm in diameter showed high hydrophilicities. Observations of the dispersed state of colloidal silicaparticles in organic-inorganic composite films by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) demonstrated that colloidal silica particles were densely aggregated on the film surface. Outdoor exposure tests of the coating materials prepared from organic silane hybridized acrylic resin and colloidal silica particles with diameters of 7.5 nm showed excellent stain resistance.

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Authors and Affiliations

  1. Kowa Chemical Industries Co., Ltd., 6-2-10 Hounanchominami, 561-0815, Toyonaka, Osaka, Japan

    Tamaki Wada

  2. Faculty of Engineering and High Technology Research Center, Kansai University, 3-3-35, Yamate-cho, 564-8680, Suita, Osaka, Japan

    Tadashi Uragami

Authors
  1. Tamaki Wada
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  2. Tadashi Uragami
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Wada, T., Uragami, T. Preparation and characteristics of a waterborne preventive stain coating material with organic-inorganic composites. J Coat. Technol. Res. 3, 267–274 (2006). https://doi.org/10.1007/s11998-006-0022-5

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  • DOI: https://doi.org/10.1007/s11998-006-0022-5

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