| abstract |
A kind of polycarbonate polyol, it is comprising at least two kinds of in the repeat unit represented by formula (1), there is the end group with hydroxyl from glycol at two ends, the particular end OH ratios for representing to be formed the ratio of the glycol represented by the following formula (2) in the glycol of end group are at least 1.0%, the glycol represented by following formula (2) formed in the glycol of end group is 3.5~10.5, R relative to the ratio between glycol represented by following formula (3) 1 At least one of be carbon number be 5 divalent straight aliphatic alkyl.In formula, R 1 Represent the divalent aliphatic hydrocarbon that carbon number is 2~12, R 2 Represent the aliphatic alkyl that carbon number is 1~9. |