Polyurethane foam and associated process for production

US6346559B1 · kind B1 · utility

Assignee

• Otto Bock Schaumstoffwerke GmbH & Co. KG · DE

Inventors

• Karl Thiele · Peine, DE
• Peter Gansen · Selters (Westerwald), DE

Key dates

• Filing date: Nov 3, 2000
• Grant date: Feb 12, 2002
• Expiry date: Nov 3, 2020

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08G2110/0083
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A polyurethane foam and associated production process, in particular flexible to semi-hard block foams or soft molded foams, using polyesters or polyethers as polyols. A carbamate, or a mixture of carbamates, is used simultaneously as propellant and as catalyst, wherein the carbamate or the carbamates have the general Formula I wherein:R1 and R2 represent the same or different alkyl radicals,R3 and R4 represent the same or different radicals and denote hydrogen or alkyl radicals,R5 denotes hydrogen, an alkanol radical, a polyether monool radical or the alkyl radical,characterized by X andn represents 2 or 3.