Preparation of highly resilient polyurethane foams

US6660783B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Andreas Arlt · Weisenheim am Berg, DE
• Klaus Wagner · Warthausen, DE
• Volker Varenkamp · Stemshorn, DE

Key dates

• Filing date: Jun 4, 2002
• Grant date: Dec 9, 2003
• Expiry date: Jun 4, 2022

Classification

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

Abstract

Highly resilient polyurethane foams are prepared by reactinga) polyisocyanates withb) compounds having at least two hydrogen atoms reactive with isocyanate groups,by a process in which a mixture containing, based in each case on the weight of the mixture,b1) from 5 to 75% by weight of at least one polymer polyol andb2) from 25 to 95% by weight of a mixture containing, based in each case on the weight of the mixture b2),b2i) from 70 to 98% by weight of at least one polyether alcohol having a molecular weight of from 3 500 to 6 500 g/mol, a functionality of less than or equal to 3 and an ethylene oxide content of from 8 to 20% by weight, based on the weight of the polyether alcohol, andb2ii) from 2 to 30% by weight of at least one polyether alcohol having a molecular weight of from greater than 4 000 to 7 000 g/mol, a functionality of from 4 to 8 and an ethylene oxide content of from 5 to 15% by weight, based on the weight of the polyether alcohol,is used as compounds b) having two hydrogen atoms reactive with isocyanate groups.