A novel polyether polyol, production of a flexible urethane...

Details A novel polyether polyol, production of a flexible urethane... A novel polyether polyol, production of a flexible urethane...

C - Chemistry, Metallurgy

08

G

C08G 65/26 (2006.01) C08G 18/48 (2006.01) C08G 18/50 (2006.01) C08G 18/63 (2006.01) C08J 9/12 (2006.01)

Patent

CA 2107291

A polyether polyol produced by using an N-amino- ethylpiperazine-ethylene oxide adduct as an initiator and addition-polymerizing an alkylene oxide thereto and having a molecular weight of about 2,000 to 7,000; a process for producing a flexible urethane foam starting with the above polyether polyol; a process suited for the production of a hot-cure urethane foam which comprises using the above polyether polyol with as hydroxyl valve of 40 to 80 mg KOH/g and, as a blowing agent, 4.6 to 6.0 weight parts of water based on 100 weight parts of the polyol; and a process suited for the production of a cold-cure urethane foam which comprises using the above polyether polyol with a hydroxyl value of 23 to 50 mg KOH/g and, as a blowing agent, 2.5 to 5.0 weight parts of water on the same basis. The use of the polyether polyol enables the production of a low-density, low-hardness flexible urethane foam using a small amount of water, without requiring any environment-unfriendly chlorofluorocarbon and without being accompanied by deterioration of humid age compression set and other characteristics.

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