| 摘要 |
PURPOSE:To obtain the titled foam having improved economic efficiency and variability with time, by blending expanding and polymerizing an organic polyisocyanate and a specific amount of a polyfunctional polyester ether polyol, etc., in the presence of a blowing agent, a specific flame-retardant and a foam stabilizer. CONSTITUTION:(A) An organic polyisocyanate and a poloyol component consisting of 60-10pts.wt. polyfunctional polyester ether polyol 40-90 substantially trifunctional polyoxypropylene polyol having 2,000-5,000mol.wt. are expanded and polymerized in the presence of (B) a blowing agent (e.g., silicone surface active agent, etc.), (C) 3-30pts.wt. aromatic phosphoric ester compound (e.g., triphenyl phosphate, etc.), (D) 2-10pts.wt. prepolymer obtained by reacting a Br-containing compound having an active carbon (e.g., dibromoneopentyl glycol, etc.) with polyisocyanate, and (E) 0.5-5pts.wt. foam stabilizer (e.g., silicone surface active agent, etc.), to give the aimed polyurethane. EFFECT:Neither change in color nor deterioration of cloth and foam. |
