| 摘要 |
<p>Provided is a method for producing a rigid foam synthetic resin, whereby it is possible to produce a lighter rigid foam while achieving good storage stability of a polyol system liquid and suppressing shrinkage deformation. A method for producing a rigid foam synthetic resin by reacting a polyether polyol (P) and a polyisocyanate compound (Y) in the presence of a foaming agent, a flame retardant, a foam stabilizer and a catalyst, wherein the method is characterized in that the polyether polyol (P) contains a polyether polyol (A) which has a random polymer chain of oxyethylene groups and oxypropylene groups, has a hydroxyl group number of 2 to 8, has a hydroxyl group value of 10 to 100 mg KOH/g and has an oxyethylene group content of 20 to 60 mass%, and a polyether polyol (B) which has a hydroxyl group number of 3 to 8 and has a hydroxyl group value of 200 to 700 mg KOH/g.</p> |
