Basf Aktiengesellschaft

Onno Graalmann

Roelof Balk

Gerhard Turznik

Wolfgang Reuther

Heinz Berbner

Isidoor De Grave

Juergen Weiser

Peter Claassen

Joachim Fischer

Wolfgang Fath

Marinus Visseren

Juergen Kerth

Heinz Weber

Hermann Tatzel

Rainer Alexander Werner

Wolfram Koegel

Guenter Kreibiehl

Wolfgang Alois Hormuth

Leonardus Aan Meulen

Frank Kolman

Bernhard Van Der Most

An aqueous polymer dispersion comprises rubber particles and polymer particles having a reinforcing action.

Aqueous polymer dispersion comprising rubber particles and polymer particles having a reinforcing action

The present invention relates to a process for preparing a polymer dispersion foam L, where:

Preparing polymer dispersion foams

An aqueous polymer dispersion is prepared by free radical aqueous emulsion polymerization of a mixture of monomers having at least one ethylenically unsaturated group, which comprises at least 30% by weight of monomers having two conjugated ethylenically unsaturated double bonds, by a process in which the polymerization temperature is varied in the course of the free radical aqueous emulsion polymerization.

Preparation of an aqueous polymer dispersion

Aqueous polymer dispersions whose polymer is built up of

Aqueous polymer dispersions

In foams having a density of from 0.01 to 0.2 g/cm.sup.3 and a cell count of from 2 to 1,000 cells/mm.sup.2 and based on an impact copolymer, the impact copolymer consists of

Foam based on an impact copolymer

Moldings, in particular foams and fibers, based on melamine/formaldehyde condensation products, in which from 0.1 to 70 mol % of the melamine have been replaced by melamine substituted by from 1 to 3 hydroxyoxaalkyl groups of the formula

Melamine resin moldings having increased elasticity

Moldings, in particular foams and fibers, based on melamine/formaldehyde condensation products, in which from 0.1 to 70 mol% of the melamine have been replaced by melamine substituted by from 1 to 3 hydroxyoxaalkyl groups of the formula

Novel foams having a density of from 0.01 to 0.1 g/cm.sup.3, based on a copolymer comprising ethylene, propylene and a C.sub.4 - to C.sub.8 -.alpha.-olefin, and having a torsion modulus of from 100 to 800 N/mm.sup.2 have high tensile, compressive and flexural strengths and at the same time high elongation at break.

Foams based on an olefin copolymer

A flexible foam composite of high flame resistance consists of one or more layers of a flexible melamine resin foam from 4 to 25 g/l in density and one or more layers of a flexible polyimide foam from 8 to 40 g/l in density.

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Dossenheim, Germany

Onno Graalmann