| 摘要 |
PURPOSE:The titled composition which can give a cured product excellent in hardness and adhesion to the surface of iron, consisting mainly of a base resin containing a specified urethane oligomer, a reactive diluent and a photopolymerization initiator. CONSTITUTION:In the title composition consisting mainly of a base resin, a reactive diluent and a photopolymerization initiator, said base resin consists partially or entirely of a urethane oligomer of an average MW of 1,000-5,000, obtained by reacting an isocyanato-terminated prepolymer which is a reaction product among a polyisocyanate, 5-50pts.wt. thioglycol and 95-50pts.wt. polyalcohol with a hydroxyl-containing unsaturated compound. This photocurable resin composition can form a cured product excellent in hardness and adhesion to the surface of iron and is useful for paints, inks and adhesives, immobilization of yeast, dental fillers, etc., and for printing board materials, photoresists, resist ink for printed circuits, etc., by virtue of its UV curability.
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