Production of flexible polyurethane foams

US5925687A · kind A · utility

Assignee

• BASF SE

Inventors

• Bernd Guettes · Sallgast, DE
• Stefan Dinsch · Schipkau, DE
• Karl-Heinz Steinchen · Schwarzheide, DE
• Gerd Hoeppner · Schwarzheide, DE
• Klaus Wagner · Warthausen, DE
• Harald Larbig · Ludwigshafen, DE
• Heinz-Dieter Lutter · Diepholz, DE

Key dates

• Filing date: Jul 18, 1997
• Grant date: Jul 20, 1999
• Expiry date: Jul 18, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S521/914
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

In a process for producing flexible polyurethane foams by reacting PA1 a) organic and/or modified organic polyisocyanates with PA1 b) relatively high molecular weight compounds containing at least two reactive hydrogen atoms and PA1 c) if desired, low molecular weight chain extenders and/or cross linkers in the presence of PA1 d) blowing agents, PA1 e) catalysts, PA1 f) flame retardants and, if desired PA1 g) further auxiliaries and/or additives, the relatively high molecular weight compounds containing at least two reactive hydrogen atoms (b) comprise at least 10% by weight of polyether polyols which can be prepared by base-catalyzed reaction of lower alkylene oxides with OH-functional initiator substances and are subjected, during or after the molecular addition of alkylene oxide, to a combined thermal/distillative treatment at a water content of at most 0.1% by weight. The flexible PUR foam produced according to the present invention can be used in the automobile and furniture sectors and for producing flexible foam/textile composites.