| abstract |
The present invention is to provide a novel polycarbonate diol which is useful as a raw material compound for producing a polycarbonate-based polyurethane having sufficient mechanical strength and excellent balance of physical properties such as oil resistance, hydrolysis resistance and weather resistance. do. This invention consists of a repeating unit of following formula (A) and following formula (B), and both terminal groups are hydroxyl groups, and ratio of following formula (A) and following formula (B) is 99: 1-1:99, The number average molecular weight relates to a polycarbonate diol, characterized in that 300 to 10,000.n n n [Formula 1]n n n n n n n n [Formula 2] |