| 摘要 |
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. <CHEM> (wherein R<1> and R<2> are the same or different and each represents lower alkyl having 1 to 8 carbon atoms), <CHEM> (wherein R<3> and R<4> are the same or different and each represents lower alkyl having 1 to 8 carbon atoms). |
