Basf Aktiengesellschaft

Harald Mahnke

Frank P Woerner

Heinz Weber

Guenter Kreibiehl

Peter Neumann

Gerhard Turznik

Hanshelmut Kaeppel

Dieter Horn

Horst Reimann

Juergen Nieberle

Josef Lamprecht

Friedrich Kraus

Volker Trautz

Eduard Heim

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.

Preparation of resilient melamine foams

A resilient foam, based on a melamine-formaldehyde condensate, which exhibits a number of important performance characteristics, namely:

Resilient foam based on a melamine-formaldehyde condensate

Stabilized melamine resin foams contain, as a stabilizer, a copper or iron compound in an amount corresponding to from 10 ppm to 3%, based on the weight of the melamine resin, of Cu or Fe, preferably an oxide, hydroxide or carbonate of copper.

Stabilized melamine resin foams

A process for the manufacture of a resilient foam based on a melamine-formaldehyde condensate, wherein an aqueous or alcoholic solution or dispersion containing a melamine-formaldehyde precondensate, an emulsifier, a blowing agent and a hardener is foamed by ultra-high-frequency irradiation and the foam is hardened by crosslinking the precondensate. The foam may be employed for heat and sound insulation, and as a packaging material.

Manufacture of resilient foams based on a melamine-formaldehyde

Non-flammable insulating materials having good fire resistance and a density of from 80 to 230 g/l, which materials comprise

Non-flammable insulating material

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Ludwigshafen, Germany

Harald Mahnke