COATING COMPOSITION, COATED METAL PLATE, AND DRAWN/IRONED CAN AND METHOD FOR PRODUCING SAME

• Main Authors: YAMAMOTO Hiromi, SAKURAGI Arata, KASHIWAKURA Takuya, ZHANG Nan
• Format: Patent
• Language: English; French; German
• Published: 14.12.2022
• Subjects: ADHESIVES; 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; MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; PUNCHING METAL; TRANSPORTING; USE OF MATERIALS THEREFOR; WOODSTAINS; WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL

A coating composition including a polyester resin blend as a principal resin, the polyester resin blend containing (A) a polyester resin having a glass transition temperature of higher than 40°C and an acid value of less than 10 mg KOH/g and (B) a polyester resin having a glass transition temperature of higher than 40°C and an acid value of 10 mg KOH/g or more and less than 50 mg KOH/g, and (C) a curing agent. Alternatively, a coating composition containing a polyester resin, as a principal resin, having a glass transition temperature of 60°C or higher, a resol-type phenol resin and/or an amino resin as a curing agent, and an organic sulfonic acid-based catalyst and/or a phosphoric acid-based catalyst as a curing catalyst, in which a content of the curing catalyst is less than 0.2 part by mass per 100 parts by mass of the principal resin. Provided is a coating composition that can manufacture a coated metal sheet and a drawn and ironed can, which have can making processability, substrate adhesion properties, and flavor sorption resistance all together.