Basf Aktiengesellschaft

Hanshelmut Kaeppel

Peter Neumann

Frank P Woerner

Harald Mahnke

Gerhard Turznik

Gerhard Heinz

Dieter Horn

Horst Reimann

Dietmar Nissen

Hermann Fischer

Wolfgang Jarre

Hermann Dikow

Josef Lamprecht

Richard Thoma

Friedrich Kraus

Klaus Matthias

Eduard Heim

Werner Lagaly

Ernst Kochendoerfer

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

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 partially dehydrated organic polymer polyol dispersions from the reaction of polyhydroxyl compounds and aqueous polymer dispersions wherein the problem of excessive viscosity is overcome by mixing the reactants with a recycled partially dehydrated polyol polymer dispersion, removing water from the reaction mixture, removing a portion of the partially dehydrated polyol polymer dispersion, and recycling the remainder.

Process for the manufacture of organic polymer polyol

An economical and environmentally advantageous process for the continuous manufacture of unsaturated polyesters, wherein the vapors formed during the polycondensation are purified, in a two-part distillation column, to a degree where the residual content of organic starting materials is less than 1.5 percent by weight, based on the total weight of the effluent, and the unconverted starting materials are recycled to the process.

Continuous manufacture of unsaturated polyesters

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Weinheim, Germany

Hanshelmut Kaeppel