| abstract |
(57) Abstract: An active energy ray-curable resin composition coated on an optical fiber, wherein the resin composition is used for a primary coating, a secondary coating, a colored layer, a unit material, and an overcoat. Yes, it can withstand the currently required high-speed processing, and has a high curability that cures sufficiently even at low irradiation doses, and at the same time, it is used for core wires, colored core wires, core units, overcoat core wires, Provided is an optical fiber coating resin composition having excellent toughness that satisfies required mechanical properties, and a product using the same. SOLUTION: A diol compound, a diisocyanate compound, a mono-hydroxyl-containing compound having two or more radically polymerizable groups and a mono-hydroxyl-containing compound having one radically polymerizable group can be obtained. An optical fiber coating resin composition containing an asymmetric polymerizable linear polyurethane compound (A) having two or more polymerizable groups and one radical polymerizable group at the other end. |