| 摘要 |
PURPOSE:To obtain a thermal insulation foam excellent in thermal insulation properties, etc., without causing any environmental problems by mixing an org. polyisocyanate, a foam stabilizer, a catalyst, water, a polyether polyol, and a specific blowing agent and allowing the resulting mixture to foam. CONSTITUTION:A thermal insulation foam is obtd. by mixing an org. polyisocyanate (e.g. a polymeric MDI), a foam stabilizer (e.g. F-335, a product of Shin-Etsu Chemical Co., Ltd.), a catalyst (e.g. Kaolizer No. 1, a product of Kao Corp.), water, a polyether polyol (e.g. a mixture of an arom.-amine-based polyether polyol and an ethylenediamine-based polyether polyol), and a blowing agent comprising 70-60wt.% cyclopentane and 30-40wt.% at least one hydrocarbon selected from the group consisting of n-pentane, 2-methylbutane, and 2,2- dimethylpropane, and then by the resulting mixture to foam. |
