Patent ID: 8129494

Claim:
A polymer comprising: a polycarbonate diol comprising a repeating unit represented by the following formulas (1) and/or (2); a polyisocyanate compound having an isocyanate group equivalent less than a terminal hydroxyl group equivalent of the polycarbonate diol; and isocyanatoalkyl acrylate and/or isocyanatoalkyl methacrylate, wherein the polycarbonate diol and the polyisocyanate compound are polymerized through a urethane bond, and a residual terminal hydroxyl group of the polymerized polycarbonate diol is bonded to the isocyanatoalkyl acrylate and/or isocyanatoalkyl methacrylate through a urethane bond: wherein R 1 represents a linear or branched hydrocarbon group having 2 to 50 carbon atoms; and n represents an integer of 2 to 50, wherein R 2 represents a linear or branched hydrocarbon group having 10 to 50 carbon atoms.