Process for the production of resilient, flexible polyurethane foams

US5977198A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Hans Hettel · Cologne, DE
• Peter Haas · Brisbane, AU

Key dates

• Filing date: Jun 12, 1998
• Grant date: Nov 2, 1999
• Expiry date: Jun 12, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S521/914
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

This invention relates to a process for the production of resilient, flexible polyurethane foams. This process comprises reacting PA1 A) polyisocyanates or polyisocyanate prepolymers, PA1 B) compounds having at least two isocyanate-reactive hydrogen atoms and a molecular weight of 500 to 18000, PA1 C) optionally, compounds having at least two isocyanate-reactive hydrogen atoms and a molecular weight from 32 to 499, PA1 D) water, PA1 E) optionally, blowing agents, PA1 F) activators, stabilizers and other per se known additives, and PA1 G) one or more crosslinking agents, PA1 wherein component B) comprises PA2 B)i) at least one polyether polyol having of a functionality of 4 to 8 preferably of 4.5 to 8, more preferably of 5 to 7, and PA2 B)ii) at least one polyol containing a filler from the group of PUD-, SAN- or PIPA-modified polyols of a functionality of 2.5 to 4, and PA1 component G) comprises one or more alkanolamine crosslinking agents which correspond to the general formula ##STR1## in which m represents an integer between 0 and 2, PA1 n represents an integer between 1 and 3 and PA1 R represents a hydrogen atom or a methyl group.