| abstract |
[PROBLEMS] To obtain a rigid foam having good characteristics by using a hydrofluoroether as a foaming agent. A polyol composition comprising 20 to 99.998% by weight of polyol (A), 0.002 to 30% by weight of polymer particles, an average number of hydroxyl groups of 2 to 8, and an average hydroxyl value of 100 to 800 mgKOH / g. The product (P) is reacted with the polyisocyanate compound in the presence of a foaming agent, a foam stabilizer and a catalyst to produce a rigid foamed synthetic resin. The blowing agent C a H c F e -O- C b H d F f (a, b is 1 to 5, a + b is 2 to 6, c, d are 0~10, c + d ≧ 1, e, f are 0 -10, e + f ≧ 2, c + d <e + f). The polyol (A) is a polyether polyol obtained by ring-opening addition polymerization of alkylene oxide using a Mannich condensation product as an initiator. [Selection figure] None |