Method for surface pretreatment before formation of...

C - Chemistry – Metallurgy – 11 – D

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C11D 3/14 (2006.01) B05D 5/00 (2006.01) B05D 5/04 (2006.01) C03C 17/34 (2006.01) C03C 23/00 (2006.01) C09D 5/00 (2006.01) C09D 183/04 (2006.01) C09K 3/18 (2006.01) C11D 1/02 (2006.01) C11D 1/65 (2006.01) C11D 1/66 (2006.01) C11D 1/83 (2006.01) C11D 3/02 (2006.01) C11D 3/06 (2006.01) C11D 3/12 (2006.01) C11D 3/30 (2006.01) C11D 3/43 (2006.01) C11D 7/06 (2006.01) C11D 7/08 (2006.01) C11D 7/10 (2006.01) C11D 7/20 (2006.01) C11D 7/50 (2006.01) C11D 11/00 (2006.01) C11D 17/00 (2006.01) C11D 1/22 (2006.01) C11D 1

Patent

CA 2290442

A process for forming a satisfactory photocatalytic hydrophilic film, including a method of treating the surface of a base on which the film is to be formed; and a detergent and an undercoat composition used in the process. The process comprises either cleaning the base surface with a given detergent, applying thereto a photocatalytic hydrophilic coating fluid, and curing the coating to form a photocatalytic hydrophilic film, or cleaning the base surface with a given detergent, applying thereto a given undercoat composition to form an undercoat layer, applying a photocatalytic hydrophilic coating fluid to the undercoat layer, and curing the coating to form a photocatalytic hydrophilic film. The detergent comprises at least one member selected among surfactants, abrasives, acids, and bases. The undercoat composition for forming an undercoat layer comprises a solvent and one of a particulate inorganic oxide, a silicone, and a silicone precursor.

Procédé servant à créer une pellicule hydrophile satisfaisante, y compris procédé servant à traiter la surface d'une base sur laquelle on doit créer cette pellicule; détergent et composition de sous-couche mis en application dans ce procédé. Ce procédé consiste, soit à nettoyer la surface de la base au moyen d'un détergent donné, à appliquer à ladite surface un liquide de revêtement hydrophile photocatalytique et à durcir ce revêtement afin de créer une pellicule hydrophile photocatalytique, soit à nettoyer la surface de la base au moyen d'un détergent donné, à appliquer à ladite surface une composition donnée de sous-couche afin de créer une sous-couche, à appliquer un liquide de revêtement hydrophile photocatalytique à la sous-couche et à durcir le revêtement afin de créer une pellicule hydrophile photocatalytique. Ce détergent est composé d'au moins un élément sélectionné dans des tensioactifs, des abrasifs, des acides et des bases. La composition de sous-couche contient un solvant et un élément dans un oxyde inorganique en particules, un silicone et un précurseur de silicone.

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