METHOD OF FORMING THICK FILM TYPE CORROSION-PROOF COATING FILM

• Main Authors: YAMAUCHI KENICHIRO, MIYASHITA TAKESHI, MATSUMOTO GOJI, YAMAMOTO MOTOHIRO
• Format: Patent
• Language: English
• Published: 02.09.2010
• Subjects: ADHESIVES; APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL; CHEMICAL PAINT OR INK REMOVERS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; CORRECTING FLUIDS; DIFFUSION TREATMENT OF METALLIC MATERIAL; DYES; FILLING PASTES; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; INKS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25; NATURAL RESINS; NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; 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

PROBLEM TO BE SOLVED: To provide a method of forming a thick film type corrosion-proof coating film which achieves, through one undercoating operation and one finishing operation, an anti-corrosion effect comparable with that attainable by conventional multi-layer coating. SOLUTION: The method of forming a thick film type corrosion-proof coating film comprises undercoating an object with a weak solvent type high-solid modified epoxy resin coating containing a binder resin ingredient comprising 70-95 mass% of a modified epoxy resin of an epoxy equivalent of 400-2,000 g/eq, 1-20 mass% of an amine resin and 1-20 mass% of a reactive diluent and having a content of nonvolatile ingredients of 80-100 mass% with respect to the total mass of the coating and then finishing it with a weak solvent type high-solid polyurethane resin coating containing a binder resin comprising 65-95 mass% of a polyol resin of a hydroxyl value of 10-100 mgKOH/g and 5-35 mass% of a polyisocyanate resin and having a content of nonvolatile ingredients of 70-100 mass% with respect to the total mass of the coating. COPYRIGHT: (C)2010,JPO&INPIT