BIOMASS-RESOURCE-DERIVED POLYURETHANE, METHOD FOR PRODUCING SAME, AND BIOMASS-RESOURCE-DERIVED POLYESTER POLYOL

摘要

The present invention relates to a biomass-resource-derived polyester polyol, which at least comprises, as constituent units, a dicarboxylic acid unit, an aliphatic diol unit, and an organic acid unit having a pKa value at 25°C of not more than 3.7, wherein the dicarboxylic acid contains at least one component derived from biomass resources, and a content of the organic acid unit is more than 0 % by mole and not more than 0.09 % by mole relative to the dicarboxylic acid unit;wherein the hydroxyl number-calculated molecular weight of the polyester polyol is 500 or more and not more than 4,000, the hydroxyl number-calculated molecular weight being calculated in the following manner while considering the polyol as a diol: $\mathrm{Hydroxyl\; number}-\mathrm{calculated\; molecular\; weight}=\left[\mathrm{Molecular\; weight\; of\; KOH}\left(\mathrm{g}/\mathrm{mole}\right)\right]/\left[\mathrm{Hydroxyl\; number}\left(\mathrm{mg}-\mathrm{KOH}/\mathrm{g}\right)\right]\times \mathrm{1},\mathrm{000}\times \mathrm{2.}\mathop{\mathrm{image}}$