Process for the production of moldings of polyurethane foams

US5426124A · kind A · utility

Assignees

• BAYER HEALTHCARE LLC · DE
• Miles Inc. · US

Inventors

• Alfred Neuhaus · Leverkusen, DE
• Peter Haas · Brisbane, AU
• Majid Daneshvar · Leverkusen, DE

Key dates

• Filing date: Mar 7, 1994
• Grant date: Jun 20, 1995
• Expiry date: Mar 7, 2014

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2375/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for the production of polyurethane foam moldings having a compact surface skin and a density of at least 150 kg/m.sup.3 comprising foaming a polyurethane-forming starting mixture inside a mold. The starting mixture comprises organic blowing agents which correspond to one or both of the following general formulas: EQU HOOC--R--COOH (I) PA1 wherein: R represents a CH.sub.2 group or a CH.dbd.CH group; and ##STR1## wherein: R.sup.1 and R.sup.2 independently of one another represent either a hydrogen atom or a C.sub.1-6 alkyl radical wherein the hydrogen atoms may be partly substituted by OH groups.