| 摘要 |
PURPOSE: To obtain an integral-skin polyurethane foam improved in productivity, moldability touch, blistering resistance, puncture resistance by pouring a reaction mixture comprising an aromatic polyisocyanate, a high-molecular-weight isocyanato-reactive compound, a specified blowing agent and other adjuvants into a mold. CONSTITUTION: An aromatic polyisocyanate (A), a high-molecular-weight isocyanato-reactive compound (B) having an OH value of 24-55mgKOH/g, an ethylene oxide content of 10-25wt.% and a terminal OH value rate of 70-95mol%, a blowing agent (C) comprising 10wt.% or below, based on component B, boric acid and/or its ester, or a mixture thereof with an organic carboxylic acid and/or its ester, a catalyst and optionally a crosslinking agent, a foam stabilizer and other adjuvants are mixed with each other, and the obtained mixture is poured into a mold and left standing to obtain a molding of a density of 0.3-0.8g/cm<3> . |
