POLYURETHANES AND POLYESTER POLYOL

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. (See formula I) (wherein R1 and R2 are the same or different and each represents lower alkyl having 1 to 8 carbon atoms), (See formula II) (wherein R3 and R4 are the same or different and each represents lower alkyl having 1 to 8 carbon atoms).