Storage-stable prepolymers sprayable from a pressure vessel

US4258140A · kind A · utility

Assignee

• BASF SE

Inventors

• Heinrich Horacek · Puchenau, AT
• Robert Gehm · Schifferstadt, DE
• Otto Volkert · Bad Dürkheim, DE
• Sarbananda Chakrabarti · Mannheim, DE
• Mathias Pauls · Appenzell, CH
• Peter Weyland

Key dates

• Filing date: Mar 28, 1979
• Grant date: Mar 24, 1981
• Expiry date: Mar 28, 1999

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S521/917
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A process for the manufacture of dimensionally stable polyurethane foams by releasing, and curing by interaction with the atmosphere, a mixture, which is under pressure, of prepolymers, containing isocyanate groups, and blowing agents, with or without assistants and additives, wherein the prepolymers, containing isocyanate groups, are obtained by reaction of organic polyisocyanates with difunctional to octafunctional polyester-polyols and/or polyether-polyols, containing chemically bonded tertiary amino groups in the polymer chain, or, preferably, with mixtures of such polyester-polyols and/or polyether-polyols and nitrogen-free polyester-polyols and/or polyether-polyols.