| 摘要 |
PURPOSE:To obtain the subject polyurethane foam excellent in mechanical strength and dimensional stability, useful as e.g. a thermal insulation for refrigerators or motor vehicles, from an organic polyisocyanate, specific polyol, catalyst and auxiliary, using specified amount of water as a foaming agent. CONSTITUTION:This polyurethane foam is obtained from (A) an organic polyisocyanate, (B) a polyol as a mixture of 1-20 pts.wt. of diethanolamine and 80-99 pts.wt. of a polyether polyol having 20-350mgKOH/g average OH value, (C) a catalyst such as trimethylaminoethyl piperazine, (D) 0.5-10 pts.wt., based on 100 pts.wt. of the component B, of water as a defoaming agent, and (E) an auxiliary such as a foam stabilizer. |
