| abstract |
PURPOSE: A resin composition capable of forming a skinnned-rigid polyurethane foam of excellent surface properties in good workability within a short time, containing a specified catalyst (a mixture containing an imidazole compound and a diazabicycloalkene). n CONSTITUTION: Use is made of, as a catalyst, a mixture of an imidazole compound of formula I (wherein R 1 is methyl or ethyl, and R 2 is H, methyl, or ethyl), e.g., 1-methylimidazole, and a diazabicycloalkene of formula II (wherein n is 3W5, and m is 3W4), e.g., 1,5-diazabicyclo[4,3,0]-undecene-7, at a molar ratio of 1:2W20. Namely, a polyol is mixed with an isocyanate, a blowing agent, a foam stabilizer, and the above catalyst to form a resin composition of preparing rigid polyurethane foams. n COPYRIGHT: (C)1985,JPO&Japio |