Production of rigid to semirigid polyurethane foams having an increased proportion of open cells and reduced shrinkage

US5654344A · kind A · utility

Assignee

• BASF SE

Inventors

• Peter Falke · Schwarzheide, DE
• Inge Rotermund · Ortrand, DE
• Bernhard Naber · Schwarzheide, DE

Key dates

• Filing date: Apr 3, 1995
• Grant date: Aug 5, 1997
• Expiry date: Apr 3, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02W30/62
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The invention relates to a process for the production of rigid to semirigid polyurethane foams having an increased proportion of open cells and reduced shrinkage using recyclate polyols. The invention furthermore relates to the rigid to semirigid polyurethane foams produced by this process.