Process for the production of foams based on aromatic isocyanates using MG(OH).sub.2 and the foams produced thereby

US4931481A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Norbert Adam · Cologne, DE
• Rolf Wiedermann · Bensberg, DE

Key dates

• Filing date: Dec 19, 1988
• Grant date: Jun 5, 1990
• Expiry date: Dec 19, 2008

Classification

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

Abstract

Combustion modified foams are produced by reacting an organic aromatic polyisocyanate with an isocyanate reactive compound in the presence of a blowing agent and Mg(OH).sub.2. The Mg(OH).sub.2 is generally used in a quantity of from 4-100 parts by weight based on the foam taken as 100 parts by weight. Mg(OH).sub.2 having a particle size of from 0.5-50 .mu.m is preferably used. The foams produced by the process are particularly useful in construction applications.