Preparation of polyurethane foams

US6191179A · kind A · utility

Assignee

• BASF SE

Inventors

• Dietrich Scherzer · Neustadt, DE
• Ulrich Treuling · Bensheim, DE
• Klaus Wagner · Warthausen, DE
• Rolf Illguth · Diepholz, DE
• Sarbananda Chakrabarti · Mannheim, DE

Key dates

• Filing date: Mar 17, 1999
• Grant date: Feb 20, 2001
• Expiry date: Mar 17, 2019

Classification

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

Abstract

A process for the preparation of foamed plastics materials based on polyisocyanate polyaddition products by the reaction of isocyanates with isocyanate-reactive compounds in the presence of catalysts and, optionally, auxiliaries and/or additives, wherein PA1 i) isocyanates having isocyanurate and/or biuret structures are used, the isocyanate-reactive compounds used are PA1 ii) at least one diol and/or polyol having a molecular weight of from 400 to 8000 and containing at least 50% of primary hydroxyl groups based on all of the hydroxyl groups present in the compound, PA1 iii) at least one compound having at least one primary amine group, and diols and/or triols having molecular weights of less than 400 are optionally used as chain-extending and/or crosslinking agents, the reaction being carried out in the presence of PA1 iv) at least one tertiary amine acting as catalyst and/or PA1 v) at least one metal salt acting as catalyst and PA1 vi) water.