Polycarbonate diol composition and coating material composition comprising same
Provided is a polycarbonate diol composition comprising a polycarbonate diol represented by a specific formula and a diol component represented by a specific formula, wherein 90% by mol or more of the total quantity of terminal groups is hydroxy groups, a hydroxy value is 10 to 400 mg-KOH/g, a proportion of the polycarbonate diol is 80% by mass or more and 99.90% by mass or less and a proportion of the diol component is 0.10% by mass or more and 20% by mass or less based on 100% by mass in total of the carbonate diol and the diol component.
1 . A polycarbonate diol composition consisting of a polycarbonate diol represented by the following formula (AA) and a diol component represented by the following formula (BB), wherein
90% by mol or more of a total quantity of a terminal group calculated from a proportion of a total hydroxyl group to a total quantity of a terminal hydroxy group is a hydroxy group,
a hydroxy value is 10 to 400 mg-KOH/g,
a proportion of the polycarbonate diol is 80% by mass or more and 99.90% by mass or less and a proportion of the diol component is 0.10% by mass or more and 20% by mass or less based on 100% by mass in total of the carbonate diol and the diol component, and
an area percentage (%) of the polycarbonate diol having a number-average molecular weight of 500 or lower in molecular weight calculation results obtained by calculation by the gel permeation chromatography (GPC) measurement of the polycarbonate diol composition is 1% or more and 20% or less, and
a proportion of the diol component represented by the formula (BB) in a dihydroxy compound obtained by the hydrolysis of the polycarbonate diol composition is 5% by mol or more, and 65% by mol or less:
wherein R11 is a C 2 -C 7 divalent linear, a C 3 -C 7 branched or a C 4 -C 7 cyclic aliphatic hydrocarbon group optionally containing a heteroatom, or a C 6 divalent aromatic hydrocarbon group optionally containing a heteroatom, and a plurality of R11 moieties are the same as or different from each other; and aa is a number of 1 or larger and 50 or smaller,
HO—R22-OH (BB)
wherein R22 is a divalent linear or branched aliphatic hydrocarbon group having 2 or more and 5 or less carbon atoms and optionally containing a heteroatom.
2 . The polycarbonate diol composition according to claim 1 , wherein a proportion of the diol component represented by the formula (BB) in a dihydroxy compound obtained by the hydrolysis of the polycarbonate diol composition is 5% by mol or more and 55% by mol or less.
3 . The polycarbonate diol composition according to claim 1 , wherein appearance of the polycarbonate diol composition stored at 5° C. for 1 week is transparent and liquid.
4 . A coating material composition comprising the polycarbonate diol composition according to claim 1 .
5 . A coating film obtained from the coating material composition according to claim 4 .
6 . The polycarbonate diol composition according to claim 1 , wherein an area percentage (%) of a number-average molecular weight of 500 or lower in molecular weight calculation results obtained by calculation by the gel permeation chromatography (GPC) measurement of the polycarbonate diol composition is 1% or more and 30% or less.
7 . The polycarbonate diol composition according to claim 1 , wherein a proportion of the diol component represented by the formula (BB) in a dihydroxy compound obtained by the hydrolysis of the polycarbonate diol composition is 5% by mol or more and 100% by mol or less.
8 . The polycarbonate diol composition according to claim 1 , wherein appearance of the polycarbonate diol composition stored at 5° C. for 1 week is transparent and liquid.
9 . A coating material composition comprising the polycarbonate diol composition according to claim 1 .
10 . A coating film obtained from the coating material composition according to claim 9 .
11 . The polycarbonate diol composition according to claim 1 , wherein R11 is at least one group selected from an ethylene group, a propylene group, a butylene group, a pentylene group, a hexylene group, and a heptylene group.