| abstract |
The polyol mixture contains the following polyols (A) and (B), the isocyanate index is 90 or more, and the total amount of Zn and Co contained in the polyol mixture is 0.1 to 200 ppm, so that flame retardancy, durability and It is excellent in weatherability, little change in hardness against temperature change, excellent in breathability, little shrinkage of foam, and stable production of flexible polyurethane foam without cell unevenness.n n n Polyol (A): The average hydroxyl number is 2-3 and the hydroxyl value is 10-90 mgKOH / g obtained by ring-opening addition polymerization of the alkylene oxide to the initiator using the composite metal cyanide complex catalyst containing Zn and Co. Polyether polyols.n n n Polyol (B): A polyether polyol having an average number of hydroxyl groups of 2 to 3 and a hydroxyl value of 15 to 250 mgKOH / g, and a polyolefin obtained by ring-opening addition polymerization of an alkylene oxide to an initiator using a complex metal cyanide complex catalyst. Polyether polyols other than ether polyols. |