| 摘要 |
PROBLEM TO BE SOLVED: To obtain a polyisocyanate composition good in compatibility with a polyol, etc., excellent in long-term preservability and expandability, containing an isocyanurated specific composition and specific additives. SOLUTION: This polyisocyanate composition comprises (A) a polyisocyanate composition, (B) a surfactant and (C) a catalyst. The component A is composed of (i) polyphenylmethane polyisocyanates and (ii) diphenylmethane diisocyanates. The component (i) contains 0.1-30wt.% of an isomer other than 4,4'- diphenylmethane diisocyanate made up of binuclear form, while the component (ii) contains 0.1-70wt.% of an isomer other than 4,4'-diphenylmethane diisocyanate, and as a part of the component (i) and/or component (ii), isocyanurated product is used; and the weight ratio (i)/(ii) is set at 0.5-25. |
