| 摘要 |
To provide a process for producing a rigid foamed synthetic resin, wherein, as a blowing agent, a hydrocarbon compound and water are used, and whereby it is possible to obtain a rigid foamed synthetic resin provided with both dimensional stability and heat insulating properties, and it is possible to reduce its weight. A process for producing a rigid foamed synthetic resin, which comprises reacting a polyol (P) with a polyisocyanate (I) in the presence of a blowing agent, a foam stabilizer and a catalyst, wherein as the blowing agent, at least a C2-8 hydrocarbon compound and water are used; the polyol (P) contains a specific polyesterpolyol (A), a specific polyetherpolyol (B), and a polymer-dispersed polyol (Z) having fine polymer particles (M) dispersed; and the isocyanate index of the polyol (P) and the polyisocyanate (I) is over 200 and at most 400.
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