Process for the preparation of polyurethane foams

US5104906A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Peter Haas · Brisbane, AU
• Hans Hettel · Cologne, DE
• Gundolf Jacobs · Rösrath, DE

Key dates

• Filing date: Jun 21, 1991
• Grant date: Apr 14, 1992
• Expiry date: Jun 21, 2011

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08K5/5333
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for the preparation of polyurethane foams in which polyisocyanates are reacted with compounds having a molecular weight of from 400 to 10,000 and containing at least two isocyanate-reactive hydrogen atoms, in the presence of water and/or organic blowing agents, catalysts, melamine as a flameproofing agent, and other flameproofing agents selected from phosphonic acid esters having the general formula ##STR1## wherein R.sup.1 is C.sub.1 -C.sub.6 alkyl, C.sub.2 -C.sub.6 unsaturated alkyl, C.sub.5 -C.sub.12 cycloalkyl, C.sub.7 14 C.sub.15 aralkyl, or C.sub.6 -C.sub.12 aryl, R.sup.2 and R.sup.3 are independently C.sub.1 -C.sub.6 alkyl, C.sub.2 -C.sub.6 unsaturated alkyl, C.sub.5 -C.sub.12 cycloalkyl, C.sub.7 -C.sub.15 aralkyl, or C.sub.6 -C.sub.12 aryl, or R.sup.2 and R.sup.3 together are C.sub.2 -C.sub.4 alkylene, R.sup.4 is C.sub.1 -C.sub.6 alkylene, C.sub.5 -C.sub.12 cycloalkylene, C.sub.7 -C.sub.15 aralkylene, or C.sub.6 -C.sub.12 arylene, R.sup.5 is C.sub.2 -C.sub.6 alkylene, C.sub.5 -C.sub.12 cycloalkylene, C.sub.7 -C.sub.15 aralkylene, or C.sub.6 -C.sub.12 arylene, and n is an integer of from 1 to about 100. The process is optionally car…