Process for the manufacture of flexible polyurethane foams with high load-bearing and high energy-absorption capacity

US4237240A · kind A · utility

Assignee

• BASF SE

Inventors

• Wolfgang Jarre · Ludwigshafen, DE
• Peter Weyland
• Gerhard Mueller · Freilassing, DE

Key dates

• Filing date: Apr 9, 1979
• Grant date: Dec 2, 1980
• Expiry date: Apr 9, 1999

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2110/0083
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention concerns a process for the manufacture of flexible polyurethane foams by reaction of a mixture consisting of diphenylmethane diisocyanates and polyphenylene polymethylene polyisocyanates having a functionality greater than 2 containing 55 to 85 percent by weight diphenylmethane diisocyanate based on the total weight of the isocyanate mixture with polyester polyols or mixtures of polyester polyols and polyether polyols having a polyester polyol content of more than 60 percent by weight based on the weight of the polyol mixture, and optionally chain extenders, auxiliaries, and additives, in the presence of catalysts and, in particular, water as a blowing agent. The special selection of starting compounds results in the production of flexible polyurethane foams having a high resistance to hydrolysis, high load-bearing capacity, and high energy absorption upon impact.