Resin coated steel manufacturing method therefor

• Main Author: Yoshizaki, Nobuki
• Format: Patent
• Language: English
• Published: 11.04.2019
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; 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; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF MATERIALS THEREFOR; WOODSTAINS

This resin-coated steel material is provided with a steel material, a primer layer on the surface of the steel material, a urethane resin layer on the surface of the primer layer, and a top coating layer on the surface of the urethane resin layer. The urethane resin layer contains a castor oil derivative having at least 2.7 hydroxyl groups per molecule, and a urethane resin obtained by polymerizing an isocyanate and an organic composition having 2.0 hydroxyl groups per molecule. The top coating layer contains an acrylic urethane resin.