The invention provides a polycarbonate diol and a polycarbonate diol copolymer each having excellent mechanical performance, hydrolysis resistance, etc. and exhibiting excellent industrial productivity. The polycarbonate diol includes a repeating unit represented by formula (1), and the polycarbonate diol copolymer includes a repeating unit represented by formula (1) and a repeating unit represented by formula (3):
(wherein each of Z1 and Z2 represents a C1 to C10 linear or branched alkanediyl group).
本发明提供了一种聚
碳酸酯二元醇和一种聚
碳酸酯二元醇共聚物,它们各自具有优异的机械性能、耐
水解性等,并表现出优异的工业生产力。聚
碳酸酯二元醇包括一个由式(1)表示的重复单元,而聚
碳酸酯二元醇共聚物包括一个由式(1)表示的重复单元和一个由式(3)表示的重复单元:
(其中 Z1 和 Z2 各代表一个 C1 至 C10 直链或支链烷二基)。