The present invention provides a polyester polyol comprising within its molecular structure both structural units respectively represented by the following general formula (I) and general formula (II). In addition, the present invention provides a polyurethane using the polyester polyol of the present invention. This polyurethane exhibits excellent resistance to hydrolysis, resistance to alkali, mechanical strength, and the like.
(wherein R1 and R2 are the same or different and each represents lower alkyl having 1 to 8 carbon atoms),
(wherein R3 and R4 are the same or different and each represents lower alkyl having 1 to 8 carbon atoms).
本发明提供了一种聚酯多元醇,其分子结构中包含分别由以下通式(I)和通式(II)表示的两个结构单元。此外,本发明还提供了一种使用本发明聚酯多元醇的聚
氨酯。这种聚
氨酯具有优异的耐
水解性、耐碱性和机械强度等。
(其中 R1 和 R2 相同或不同,各自代表具有 1 至 8 个碳原子的低级烷基)、
(其中 R3 和 R4 相同或不同,各自代表具有 1 至 8 个碳原子的低级烷基)。