Preparation of resilient melamine foams

US4666948A · kind A · utility

Assignee

• BASF SE

Inventors

• Frank P. Woerner · Monsheim, DE
• Peter Neumann · Wiesloch, DE
• Harald Mahnke · Ludwigshafen, DE
• Josef Lamprecht · Ludwigshafen, DE
• Dieter Horn · Heidelberg, DE
• Gerhard Turznik · Arnstadt, DE
• Friedrich Kraus · Adelsried, DE
• Hanshelmut Kaeppel · Weinheim, DE
• Eduard Heim · Worms, DE

Key dates

• Filing date: Sep 24, 1986
• Grant date: May 19, 1987
• Expiry date: Sep 24, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08J2361/28
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Resilient foams based on melamine resins are prepared by foaming an aqueous solution which contains a melamine/formaldehyde precondensate, an emulsifier, a volatile blowing agent and a curing agent and then curing the foam. In this process, from 0.2 to 4% by weight of an alkali metal, alkaline earth metal or aluminum salt of an organic, preferably polybasic acid, of a polyphosphoric acid or of a boron acid are added to the aqueous solution.