Patent ID: 8524839

Claim:
A curable resin composition comprising: unsaturated urethane oligomer (A): an unsaturated urethane oligomer having from 2 to 3 curable functional groups as mentioned below, on average per molecule, which is a reaction product of the following polyol component (A1), a polyisocyanate (A2) and the following unsaturated hydroxy compound (A3), or a reaction product of the following polyol component (A1) and an unsaturated isocyanate (A4) having the following curable functional group, polyol component (A1): a polyol component comprising the following polyol (a1), polyol (a1): a polyoxyalkylene polyol having a hydroxy value of from 15 to 30 mgKOH/g and an oxyethylene group content of from 8 to 50 mass % in the total oxyalkylene groups of 100 mass %, which is obtained by reacting a monoepoxide having at least three carbon atoms and ethylene oxide with an initiator having from 2 to 4 active hydrogen atoms on average, unsaturated hydroxy compound (A3): a compound having the following curable functional group and a hydroxy group, and curable functional group: a group represented by CH 2 ═C(R)C(O)O— wherein R is a hydrogen atom or a methyl group, monomer (B): a compound represented by CH 2 ═C(R)C(O)O—R 2 , wherein R is a hydrogen atom or a methyl group, and R 2 is a C 3-8 hydroxyalkyl group having from 1 to 2 hydroxy groups and monomer (C): a compound represented by CH 2 ═C(R)C(O)O—R 3 , wherein R is a hydrogen atom or a methyl group, and R 3 is a C 8-22 alkyl group.