Polycarbonate diol composition

A polycarbonate diol composition comprising a polycarbonate diol having:

• a plurality of structures represented by the following general formula (I):
• wherein in each structure of the plurality of structures represented by the general formula (I):
• R11 is a divalent linear, branched or cyclic aliphatic, or aromatic hydrocarbon group having 2 or more and 20 or less carbon atoms, and
• n11 is an arbitrary integer;
• and
• a polycarbonate structure represented by the following general formula (II):
• wherein
• R21 is a divalent linear, branched or cyclic aliphatic, or aromatic hydrocarbon group having 2 or more and 15 or less carbon atoms, and a plurality of R21 moieties are the same as or different from each other,
• and n21 is an arbitrary integer;
• wherein
• a melt viscosity of the polycarbonate diol at 50° C. is 1000 to 10000 mPa·s, and
• the plurality of structures represented by the general formula (I) are configured such that an average value of the number of repeats represented by n11 in the plurality of structures represented by general formula (I) is 12 or larger with the proviso that a structure of the general formula (I) wherein R11 is a divalent linear and/or branched aliphatic hydrocarbon group having 3 carbon atoms constitutes 60% by mass or more and 95% by mass or less of a total mass of the plurality of structures represented by the general formula (I).