Antifouling member and antifouling coating composition

Details Antifouling member and antifouling coating composition Antifouling member and antifouling coating composition

C - Chemistry, Metallurgy

09

K

C09K 3/00 (2006.01) A61L 29/00 (2006.01) A61L 31/00 (2006.01) A61L 33/00 (2006.01) B08B 17/02 (2006.01) B08B 17/06 (2006.01) C09D 1/00 (2006.01) C09D 5/00 (2006.01) C09D 5/16 (2006.01) C09D 127/12 (2006.01) C09D 183/02 (2006.01) C09D 183/04 (2006.01) C09K 3/18 (2006.01) F28F 13/18 (2006.01)

Patent

CA 2256895

A member having an antifouling surface comprising a microscopically dispersed, exposed hydrophobic portion and an hydrophilic portion induced by a photocatalyst. The member according to a first embodiment comprises a substrate and a surface layer provided on the substrate, the surface layer comprising a photocatalytic oxide, a silicone resin or silica, and a water- repellent fluororesin, wherein the silicone or silica and the water-repellent fluororesin are microscopically dispersed and exposed onto the outermost surface of the surface layer. The member according to a second embodiment comprises a substrate and a surface layer provided on the substrate, the surface layer comprising a hydrophobic resin and a photocatalytic oxide, wherein the hydrophobic resin and the photocatalytic oxide are microscopically dispersed and exposed onto the outermost surface of the surface layer and the photocatalytic oxide, by virtue of the photocatalytic activity created upon photoexcitation, is self-hydrophilized or hydrophilizes a photocatalytic oxide present in the vicinity of the above photocatalytic oxide.

Cette invention concerne un élément possédant une surface anti-encrassement qui comprend une partie hydrophobe exposée et à dispersion microscopique, ainsi qu'une partie hydrophile induite par un catalyseur. Dans un premier mode de réalisation, cet élément comprend un substrat sur lequel se trouve une couche de surface. Cette couche de surface comprend un oxyde photocatalytique, une résine silicone ou de la silice, ainsi qu'une fluororésine hydrofuge. La résine silicone, ou la silice, ainsi que la fluororésine hydrofuge sont dispersées de manière microscopique et exposées sur la surface située le plus à l'extérieur de ladite couche de surface. Dans un second mode de réalisation, cet élément comprend un substrat sur lequel se trouve une couche de surface. Cette couche de surface comprend une résine hydrophobe ainsi qu'un oxyde photocatalytique, ces deux éléments étant dispersés de manière microscopique et exposés sur la surface située le plus à l'extérieur de ladite couche de surface. Sous l'effet de l'activité photocatalytique générée lors d'une photo-excitation, l'oxyde photocatalytique est automatiquement hydrophilisé ou, encore, va hydrophiliser un autre oxyde photocatalytique situé à proximité.

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