| 摘要 |
PURPOSE:To produce a foamed thermal insulant excellent in the thermal insulating properties with a reduced amt. of a chlorofluorocarbon blowing agent used by mixing a specific premix component with a specific isocyanate component and foaming the resulting mixture. CONSTITUTION:A premix component comprising a polyether (e.g. an arom. amine-based polyether), a foam stabilizer (e.g. F-335, a product of Shin-Etu Chemical Co.), a catalyst (e.g. Kaolizer No.1, a product of Kao), water, and a chlorofluorocarbon blowing agent (e.g. chlorofluorocarbon-11) is mixed with an isocyanate component comprising a hydrophobic powdered activated carbon surface-treated with a silicone oil (e.g. KF-99, a product of Shin-Etu Chemical Co.) and an org. polyisocyanate (e.g. crude MDI), and the resulting mixture is foamed. |
