Preparation of cellular polyurethanes

US5578653A · kind A · utility

Assignee

• BASF Schwarzheide GmbH · DE

Inventors

• Regina Hendreich · Ortrand, DE
• Peter Falke · Schwarzheide, DE
• Dieter Tintelnot · Diepholz, DE
• Marion Wenzel · Ludwigshafen, DE

Key dates

• Filing date: Oct 12, 1995
• Grant date: Nov 26, 1996
• Expiry date: Oct 12, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2375/04
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

A process for the production of cellular polyurethanes by reacting PA0 a) at least one organic and/or modified organic polyisocyanate, PA0 b) at least one relatively high-molecular-weight compound containing at least two reactive hydrogen atoms, if desired PA0 c) low-molecular-weight chain extenders and/or crosslinking agents, in the presence of PA0 d) blowing agents, PA0 e) catalysts, and, if desired, PA0 f) auxiliaries and/or additives, wherein the blowing agent d) is at least one acetal.