POLYISOCYANATE COMPOSITION AND METHOD FOR PRODUCTION THEREOF, BLOCK POLYISOCYANATE COMPOSITION AND METHOD FOR PRODUCTION THEREOF, RESIN COMPOSITION, CURABLE RESIN COMPOSITION, AND CURED ARTICLE

摘要

A polyisocyanate composition containing a polyisocyanate that is a reaction product of a polyisocyanate precursor with a polycarbonatediol, wherein the polyisocyanate precursor comprises a dimer or a higher-order multimer of at least one diisocyanate selected from the group consisting of aliphatic diisocyanates and alicyclic diisocyanates, and the polycarbonatediol is produced by copolymerizing at least one diol selected from the group consisting of diols each having 2 to 20 carbon atoms with a carbonate compound. In the polyisocyanate composition, the polyisocyanate precursor has an isocyanurate group and an allophanate group, and the molar ratio of the isocyanurate group to the allophanate group (i.e., (the isocyanurate group)/(the allophanate group)) is 80:20 to 99:1 inclusive.