| abstract |
(57) Abstract: An object of the present invention is to provide a composition for rigid foam and a foam having excellent foaming properties, and further excellent brittleness and flame retardancy. The present invention provides a carbodiimide-modified isocyanurate rigid foam comprising (A) an organic polyisocyanate compound, (B) a polyol compound, (C) a trimerization catalyst, (D) a carbodiimidation catalyst, and (E) a blowing agent. The composition for at least one or more molecular weight: less than 150, A composition for a rigid foam, comprising a low molecular weight hydroxyl group-containing compound (F) having a hydroxyl value of 500 to less than 2,000 (mgKOH / g), and a foam thereof. |