Process for the production of flexible slabstock polyurethane foams

US4970243A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Gundolf Jacobs · Rösrath, DE
• Peter Haas · Brisbane, AU
• Hans-Walter Illger · Rösrath, DE
• Hans-Joachim Kogelnik · Pittsburgh, US
• Klaus-Dieter Wolf · Cologne, DE

Key dates

• Filing date: Jun 6, 1989
• Grant date: Nov 13, 1990
• Expiry date: Jun 6, 2009

Classification

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

Abstract

This invention relates to a process for the production of elastic, open-cell flexible slabstock polyurethane foams comprising reacting at an isocyanate index less than about 80 one or more polyisocyanates selected from the group tolylene diisocyanates, hexamethylene diisocyanate, and isophorone diisocyanate, with compounds containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight of about 400 to about 10,000, in the presence of water as blowing agent in a quantity of about 5 to about 15 parts by weight for every 100 parts by weight of the isocyanate-reactive compound. The process may optionally include chain-extending and crosslinking agents containing at least two isocyanate-reactive hydrogen atoms and having a molecular weight of about 32 to about 399, and may optionally be carried out in the presence of other blowing agents, catalysts, auxiliaries, and additives.