| abstract |
Polycarbonate diols and polycarbonate diol copolymers having excellent mechanical performance, hydrolysis resistance, and the like, having excellent industrial productivity, include polycarbonate diols having a repeating unit represented by the formula (1), and a repeating unit represented by the formula (1). And a polycarbonate diol copolymer having a repeating unit represented by the formula (3). [Formula 1] (2) (In formula, Z < 1> and Z < 2> respectively independently show a C1-C10 linear or branched alkenidayl group.) |