| 摘要 |
PURPOSE:To obtain a molded item which has excellent foam stability, curability, etc., and is useful as a soundproofing and vibration-proof material, by reacting a polyalkylene polyol contg. asphalt emulsion-dispersed therein with a polyisocyanate in the presence of a catalyst and a blowing agent in a mold. CONSTITUTION:Asphalt (a) is molten by heating it at 100-200 deg.C and emulsion- dispersed in a polyalkylene polyol (b) having at least two hydroxyl groups per molecule heated to 100 deg.C in the presence of a surfactant in a weight ratio of (b) to a of 100:10-200 to obtain a polyalkylene polyol (A) contg. fine asphalt particles having a particle size of 2-50mum dispersed therein. The component A, a polyisocyanate (B) having at least two isocyanate groups, a catalyst (C), a blowing agent (D) and optionally, an inorg. filler, a flame retarder, etc., (E) are introduced into a mold and they are reacted.
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