| abstract |
(57) [Summary] [Purpose] A method for producing a foam having excellent properties such as heat resistance, flame retardancy, and low smoke emission, and a low-viscosity, high-boiling point product for use in the foam. A liquid stable organic polyisocyanate composition and a modified isocyanurate are provided. [Structure] A polyisocyanate mixture of diphenylmethane diisocyanate-based polyisocyanate and tolylene diisocyanate in which a part of isocyanate groups may be modified, a carboxylic acid or carboxylic acid ester having a specific structure, a carbonate compound, and optionally an isocyanate An organic polyisocyanate composition containing a nurate-forming catalyst and a co-catalyst, and a surfactant if necessary, and an isocyanurate-modified product thereof, and a method for producing a foam using the same. |