Method for the production of highly elastic, cold-curing polyurethane foams

US5064870A · kind A · utility

Assignee

• Th. Goldschmidt. AG · DE

Inventors

• Hans-Joachim Kollmeier · Essen, DE
• Georg Burkhart · Essen, DE
• Rolf-Dieter Langenhagen · Hattingen, DE
• Helmut Lammerting · Witten, DE
• Bernd-Jurgen Klietsch · Essen, DE

Key dates

• Filing date: Oct 10, 1990
• Grant date: Nov 12, 1991
• Expiry date: Oct 10, 2010

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S521/904
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

In a method for the preparation of highly elastic, cold curing polyurethane foams, equilibrated organofunctional polysiloxanes of the average general formula ##STR1## wherein R.sup.1 is methyl or R.sup.2, PA1 R.sup.2 is chloropropyl, PA1 n has a value of 0 to 12, PA1 m has a value of 1 to 8 when R.sup.1 is methyl and a value of 0 to 6 when R.sup.1 is chloropropyl, PA1 are added in amounts of 0.01 to 2.0% by weight, based on the polyols, to the reaction batch. The stabilizing properties of the organofunctional polysiloxanes are superior to those of the known products. The foams, produced pursuant to the invention, have a coarser cell structure and a higher elasticity. The foams are more open-celled as measured by the impression force.