| 摘要 |
<p>The present invention relates to a method for manufacturing an isocyanate group-terminated prepolymer, comprising the following steps (a) to (d): (a) a step of ring-opening polymerizing an alkyleneoxide-containing cyclic compound by using an initiator in the presence of a composite metal cyanide complex catalyst in such an amount that the amount of a metal derived from the composite metal cyanide complex catalyst becomes from 1 to 30 ppm by mass based on the final product polyol, thereby obtaining a polyol composition containing the catalyst; (b) a step of, without removal of the composite metal cyanide complex catalyst from the polyol composition obtained in the step (a), adding water in an amount of 0.05 to 20% by mass based on the polyol composition and performing a heat treatment in a closed system; (c) a step of subjecting the hydrous polyol composition after the step (b) to a dehydration treatment until the water content in the composition becomes from 5 to 500 ppm by mass; and (d) a step of adding a polyisocyanate compound to the polyol composition after the step (c) and subjecting to a reaction with the polyol in the polyol composition.</p> |
