Patent ID: 8487015

Claim:
A process for producing a flexible polyurethane foam, which comprises reacting a polyol mixture with a polyisocyanate compound in the presence of a urethane-forming catalyst, a blowing agent and a foam stabilizer, wherein the polyol mixture comprises a polyol (A) and a polyol (B), and the proportion of the polyisocyanate compound to the polyol mixture is at least 90 by isocyanate index, and the total amount of Zn and Co in the polyol mixture is from 0.1 to 200 ppm, wherein: polyol (A) is a polyether polyol having an average of from 2 to 3 hydroxyl groups and a hydroxyl value of from 10 to 90 mgKOH/g, obtained by ring-opening addition polymerization of only propylene oxide to an initiator with a double metal cyanide complex catalyst; and polyol (B) is a polyoxypropylene polyol having an average of from 2 to 3 hydroxyl groups and a hydroxyl value of from 15 to 250 mgKOH/g, which is obtained by ring-opening addition polymerization of only propylene oxide (PO) to an initiator with an alkali metal compound catalyst, and is a polyether polyol other than the polyether polyol obtained by ring-opening addition polymerization of only propylene oxide to an initiator with a double metal cyanide complex catalyst.