Basf Aktiengesellschaft

Michael Witt

Klaus Hahn

Dietrich Scherzer

Knut Kaempfer

Wolfram Husemann

Michael Riethues

Hans Hintz

Dieter Naegele

Rolf Henn

Maria Lorenz

Anthony Schaefer

Manfred Walter

Hans D Zettler

Jan Holoch

Gerhard Alicke

Michael Schiessl

Michael Baumgartel

Gerhard Dembek

Wolf-Dieter Back

Peter Nikolaus Lay

Continuous production process of expandable styrene polymer beads

Expandable styrene polymers containing recycled material

Preparation of bead-form expandable styrene polymers having improved

Expandable styrene polymers containing recycled polystyrene have a content of recycled material of up to 40% by weight, based on the total weight of the polystyrene, wherein, in the course of the polymerization of the reaction mixture, from 100 to 500 ppm of a molecular weight regulator and/or from 0.05 to 1.0% by weight, based in each case on the polymerization solution, of a finely divided polyethylene wax are added.

Bead-form, expandable styrene polymers containing, based on the styrene polymer, from 0.005 to 1.5% by weight of polyethylene wax and from 0.005 to 1% by weight of dimeric .alpha.-methylstyrene, and a process for the preparation thereof.

Bead-form, expandable styrene polymers having a reduced internal water

A process for the preparation of expandable thermoplastic polymers by post-impregnation with a blowing agent in aqueous suspension in the presence of a mixture of magnesium pyrophosphate and a sulfonate group-containing extender as suspension stabilizer, in a reactor comprises

Preparation of expandable thermoplastic polymers by post-impregnation

Expandable thermoplastic polymers in particle form comprising a) at least one organic boron-silicon compound, b) at least one thermoplastic polymer and c) a blowing agent, a process for their preparation, and the foams produced using these expandable thermoplastic polymers.

Expandable thermoplastic polymers containing organic boron-silicon

A process for the deodorization of used foam moldings, in which the used foam moldings are treated

Deodorization of used foam moldings, in particular fish crates

Bead-form expandable styrene polymers are obtained by suspension polymerization of styrene with addition of from 1 to 10% by weight of C.sub.3 - to C.sub.7 -hydrocarbons and/or carbon dioxide as blowing agent and, if desired, conventional additives, using, as suspension stabilizer, a mixture of magnesium pyrophosphate, a sulfonate group-containing extender and an alkali metal carboxylate or alkaline earth metal carboxylate, the magnesium pyrophosphate being prepared immediately before the polymerization by combining an aqueous solution of alkali metal pyrophosphate with at least the stoichiometrically necessary amount of a magnesium salt.

Preparation of bead-form expandable styrene polymers

The invention relates to expandable styrene polymers containing

Expandable styrene polymers containing carbon dioxide as blowing agent

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Ludwigshafen, Germany

Michael Witt