| abstract |
The present invention relates to a novel polycarbonate diol which imparts a polycarbonate-based polyurethane which is excellent in hydrophilicity and excellent in hardness and scratch resistance and which is useful for coatings, coating agents, synthetic leather, artificial leather and high-performance elastomer applications, As a raw material. The present invention also provides an active energy ray-curable polymer composition which can obtain a cured film having excellent stain resistance and hardness. The present invention is obtained, for example, by reacting two specific diols and a carbonic acid diester in the presence of an ester exchange catalyst which is a compound using a Group 1 or Group 2 metal of the periodic table, A polyurethane obtained by using the polycarbonate diol, and a urethane (meth) acrylate oligomer as a reaction product of the polycarbonate diol. The present invention also provides an active energy ray curable polymer composition comprising the polycarbonate diol and the urethane (meth) acrylate oligomer. |