Abstract: The present invention provides a curable liquid resin composition that when cured, exhibits excellent removability from an adjacent coating layer and low cure shrinkage rate and coefficient of linear expansion. This composition is suitable for an optical fiber upjacket material. The curable liquid resin optical fiber upjacket composition comprising a urethane (meth)acrylate, a monofunctional radiation-curable monomer, a polyfunctional radiation-curable monomer and inorganic particles or polymer particles having an average particle size of 0.1 to 100 ?m.

Abstract: The present invention provides a curable liquid resin composition which, when cured, exhibits excellent removability from an adjacent coating layer as well as small deterioration when exposed under high-temperature and humidity condition and which is suitable for an optical fiber upjacket material. The curable liquid resin optical fiber upjacket composition comprising a urethane (meth)acrylate or a (meth)acrylate oligomer, a reactive diluent, a polymerization initiator, and a silicone compound having an average molecular weight of 1250 to 35000.

Abstract: The invention relates to a curable liquid resin composition comprising: (A) a urethane(meth)acrylate having a structure originating from a polyol and a number average molecular weight of 800 g/mol or more, but less than 6,000 g/mol, and (B) a urethane(meth)acrylate having a structure originating from a polyol and a number average molecular weight of 6,000 g/mol or more, but less than 20,000 g/mol, wherein the total amount of the component (A) and component (B) is 20-95 wt % of the curable liquid resin composition and the content of the component (B) is 0.1-30 wt % of the total of the component (A) and component (B).

Abstract: The invention relates to a curable liquid resin composition which exhibits excellent curability, can be applied at high speed, and produces a cured product having a Young's modulus appropriate for the upjacket layer and excellent coating removal properties of the upjacket layer. The curable liquid resin composition according to the invention comprises: (A) a urethane (meth)acrylate, (B) a reactive diluent, (C) a polymerization initiator, and (D) particles with a number average particle size of 0.1-100 ?m.