Production of flameproofed, rigid, isocyanate-based foams

US5981612A · kind A · utility

Assignee

• BASF SE

Inventors

• Uwe Keppeler · Hochdorf-Assenheim, DE
• Werner Hinz · Bischofswerda, DE
• Michael Reichelt · Ruhland, DE

Key dates

• Filing date: Oct 29, 1997
• Grant date: Nov 9, 1999
• Expiry date: Oct 29, 2017

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S521/906
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The flameproofed, rigid, isocyanate-based foams, in particular rigid polyurethane and polyisocyanurate foams, are produced by reacting PA1 a) organic and/or modified organic polyisocyanates with PA1 b) at least one relatively high-molecular-weight compound containing at least two reactive hydrogen atoms, and, if desired, PA1 c) low-molecular-weight chain extenders and/or crosslinking agents, in the presence of PA1 d) blowing agents, PA1 e) catalysts, PA1 f) flameproofing agents, and, if desired, PA1 g) further auxiliaries and/or additives, wherein the flameproofing agent is a combination of at least one liquid flameproofing agent which is reactive toward isocyanates and at least one solid flameproofing agent.