| abstract |
The present invention is made up of a repeating unit represented by the following formula (1) and / or formula (2), wherein the sock terminal is a hydroxyl group, and the number average molecular weight is 300 to 50,000, thereby using excellent polycarbonate diol. Polymers can be prepared.n n n [Formula 1]n n n n n n n n (In formula, R < 1> represents a C2-C50 linear or branched hydrocarbon group, n represents the integer of 2-50.)n n n [Formula 2]n n n n n n n n (In formula, R < 2> represents a C10-C50 linear or branched hydrocarbon group.) |