液状硬化性樹脂組成物

Title:

液状硬化性樹脂組成物

Document Type and Number:

Japanese Patent JP5307317

Kind Code:

B2

Abstract:

To provide a liquid curable resin composition which is excellent in storage stability as the liquid curable resin composition, little stains a transparent cylinder with evaporated components, when forming optical fiber coating layers, and gives cured coating films with large stress relaxation rate.

This liquid curable resin composition comprises (A) at least the following two urethane (meth)acrylate oligomers (A1) and (A2), (A1): a urethane (meth)acrylate oligomer which is a reaction product of (a) a polyetherpolyol, (b) a polyisocyanate, and (c) a hydroxy group-containing (meth)acrylate, and (A2): a urethane (meth)acrylate oligomer which is a reaction product of (b) a polyisocyanate with two or more kinds of different (c) hydroxy group-containing (meth)acrylates, (B) a compound represented by the following formula (1): CH2=CR1COOR2(R1is H or methyl; R2is a straight chain or branched chain 4 to 12C alkyl), and (C) a polymerization initiator.