Oxazolidone ring-containing epoxy resin

摘要

The present invention provides a novel oxazolidone ring-containing epoxy resin suitable for use as a resin for a coated film having a structure of the formula: wherein R<3 >represents a residue excluding epoxy groups of diepoxide, X represents a residue excluding isocyanate groups of polyurethane diisocyanate, and n represents an integer of 1 to 5; and wherein X has a structure of the formula: wherein R<1 >represents a residue excluding isocyanate groups of diisocyanate, R<2 >represents a residue excluding hydroxyl groups of diol, and m represents an integer of 2 to 10. The oxazolidone ring-containing epoxy resin of the present invention affords a coated film excellent in impact resistance in addition to heat resistance, and corrosion resistance.