Process for the preparation of flexible polyurethane foams...

Details Process for the preparation of flexible polyurethane foams... Process for the preparation of flexible polyurethane foams...

C - Chemistry, Metallurgy

08

G

400/102, 403/40

C08G 18/48 (2006.01) C08G 18/40 (2006.01) C08G 18/42 (2006.01)

Patent

CA 1179099

A PROCESS FOR THE PREPARATION OF FLEXIBLE POLYURETHANE FOAMS EMPLOYING POLYESTER-POLYETHER POLYOL MIXTURES Abstract of the Invention The invention concerns a process for the preparation of flexible polyurethane foams having good hydrolytic stability, improved damping, with equal or higher levels of other physical properties and with a high absorption capacity. The foams are prepared by reacting organic polyisocyanates and mixtures of (a) liquid polyester polyols, which are produced by the polycondensation of organic dicarboxcylic acid and a polyol mixture which contains 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, and at least one triol, and (b) di- to tetra-functional polyether polyols having molecular weights of 1500 to 6000 in the presence of catalysts and blowing agents as well as optionally chain extenders, auxiliaries, and additives.

393707

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