COATED STEEL SHEET

• Main Authors: SASAKI MOTOHIRO, TAKAHASHI AKIRA, FUDA MASAHIRO, MORISHITA ATSUSHI, KAROJI JUNPEI, KANAI HIROSHI, SAITO KOICHI
• Format: Patent
• Language: English
• Published: 25.03.2009
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; 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 BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; CORRECTING FLUIDS; DIFFUSION TREATMENT OF METALLIC MATERIAL; DYES; FILLING PASTES; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; INKS; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; POLISHES; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION; TECHNICAL SUBJECTS COVERED BY FORMER USPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; THEIR PREPARATION OR CHEMICAL WORKING-UP; USE OF MATERIALS AS ADHESIVES; USE OF MATERIALS THEREFOR; WOODSTAINS

Provided is a coated steel sheet which is improved in tape peeling resistance, solvent resistance, alkali resistance, abrasion resistance, etc. The coated steel sheet coated with a composite coating is characterized in that the composite coating comprises a composite resin (A) containing polyurethane resin particles (A-1) and ethylene-unsaturated carboxylic acid copolymer resin particles (A-2) in an mass ratio of 20:80 to 90:10, wherein respective resin particles have an average particle diameter of 20 to 100 nm and have a silanol group and/or an alkoxysilyl group, and further containing silicon oxide particles (A-3) having an average particle diameter of 5 to 20 nm and an organic titanium compound (A-4); polyolefine wax particles (B) having an average particle diameter of 0.5 to 4 mum and a softening point of 100 to 1400°C; and silicon oxide particles (C) having an average particle diameter of 70 to 200 nm, and in that the amount of the coating is 0.5 to 3 g/m2.