ADHESIVE FOR PLASTIC FILM-LAMINATED STEEL SHEET SHOWING EXCELLENT HEAT RESISTANCE AND ADHESION, MANUFACTURING METHOD THEREOF AND PLASTIC FILM- LAMINATED STEEL SHEET

摘要

PURPOSE: Provided is an adhesive for use in a steel sheet laminated with a sparingly adhesive resin film such as a polyolefin film, which shows excellent heat resistance after lamination and ensures excellent adhesion. CONSTITUTION: The adhesive comprises: (1) a blocked isocyanate group-containing polyester polyurethane obtained by blocking unreacted isocyanate groups of an isocyanate-containing polyester polyurethane with a blocking agent, wherein the polyester polyurethane is obtained by reacting a hydroxy group-containing compound with a polyisocyanate compound, under the condition that the content of isocyanate groups exceeds the combined contents of the hydroxy groups in the hydroxy-containing compound including a polyester polyol and a hydroxy-containing silicon compound; (2) an epoxy resin; and (3) an acid-modified polyolefin resin.