PRODUCTION OF SURFACE TREATED STEEL SHEET EXCELLENT IN SELF-CLEANING PROPERTIES

PURPOSE: To dispense with the formation of a film after processing and to enhance the cleaning properties of a surface treated steel sheet, in an epoxy resin containing a monomethylsilanol sol and a powder of oxides of W and Mo adapted to the treatment of a steel sheet, by specifying the addition am...

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Bibliographische Detailangaben
Hauptverfasser:	HIRAOKA MASAJI, MINAMI NAOTAKA, UCHIDA YUKIO, IZUMI KEIJI
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CORRECTING FLUIDS DYES FILLING PASTES INKS LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PERFORMING OPERATIONS POLISHES PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL SPRAYING OR ATOMISING IN GENERAL TRANSPORTING USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	PURPOSE: To dispense with the formation of a film after processing and to enhance the cleaning properties of a surface treated steel sheet, in an epoxy resin containing a monomethylsilanol sol and a powder of oxides of W and Mo adapted to the treatment of a steel sheet, by specifying the addition amt. of additives, the compsn. of the resin, the thickness of a coating film and a coating film forming condition. CONSTITUTION: Three mols of water is added to one mol of monomethyltrialkoxysilane to hydrolyze the same to form a monomethylsilanol sol. Subsequently, isocyanate and an epoxy resin are added in a ratio of (isocyanate wt. + epoxy resin wt.)/(non-volatile component wt. of monomethylsilanol zol)=0.1-0.5 and (isocyanate group/isocyanate wt. per equivalent)/(epoxy resin wt. per one equivalent of epoxy group)=0.5-2.0. Further, oxide of W and/or Mo with an average particle size of 0.1-20μm is added to the sol non-volatile component in an amt. of 2-30 mass % and a coating film is applied to at least the single surface of the steel sheet in a dry thickness of 1-30μm to be heated at reaching temp. of 450-750 deg.C for 10-60min.