Disclosed is a polycarbonate diol having diol monomer units and carbonate monomer units, wherein the amount of at least one diol monomer unit selected from the group consisting of a 1,5-pentanediol unit and a 1,6-hexanediol unit is from 50 to 100 % by mole, based on the total molar amount of the diol monomer units, and wherein the ratio of primary hydroxyl groups in all terminal groups of the polycarbonate diol is in a specific range. Also disclosed is a thermoplastic polyurethane obtained by copolymerizing the above-mentioned polycarbonate diol and a polyisocyanate.
本发明公开了一种具有二元醇单体单元和
碳酸酯单体单元的聚
碳酸酯二元醇,其中至少一种二元醇单体单元选自
1,5-戊二醇单体单元和
1,6-己二醇单体单元组成的组,基于二元醇单体单元的总摩尔量,其用量为 50%至 100%(以摩尔计),并且聚
碳酸酯二元醇的所有末端基团中伯羟基的比例在特定范围内。本发明还公开了一种通过上述聚
碳酸酯二元醇和多
异氰酸酯共聚得到的热塑性聚
氨酯。