| 摘要 |
PROBLEM TO BE SOLVED: To provide a preparation process of a rigid foaming synthetic resin exerting a good dimensional stability through a spraying foaming method. SOLUTION: A polyol (V) is allowed to react with a polyisocyanate in the presence of a foam stabilizer, a catalyst and a foaming agent to prepare a rigid foaming synthetic resin through a spraying foaming method. Here, the polyol (V) contains a polyether polyol (X) wherein the hydroxy value is 84 mg KOH/g or smaller and the oxyethylene group content is 40 wt.% or larger and an amine polyol (Y) wherein the hydroxy value is 250 to 900 mg KOH/g which is obtained by adding a cyclic ether to an amine compound, and is a polyol containing, against the total weight of the polyol (V), 0.01 wt.% or more polymer fine particles stably dispersed in the polyol (V). |
