Basf Aktiengesellschaft

Joachim Fischer

Isidoor De Grave

Klaus Hahn

Wolfram Kogel

Onno Graalmann

Jens Rieger

Walter Heckmann

Juergen Kerth

Franz-Josef Dietzen

Gerd Ehrmann

Hermann Tatzel

Karl-Heinz Wassmer

Rainer Alexander Werner

Rolf Henn

Wolfram Koegel

Jurgen Schweinzer

Erich Klement

Hans Ho/ Nl

Production of expanded polyolefin particles

In a process for producing polyolefin foam particles, partially foamed particles are produced in a first stage by extrusion of a polyolefin containing solid blowing agents, and these are then further foamed in the second stage using steam.

Polyolefin particle foam

Prefoamed polyolefin beads produced by extrusion

Production of expanded polyolefin beads

The invention relates to expandable styrene polymers for elastic polystyrene foams, comprising

Expandable styrene polymers

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

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

Growing community of inventors

Grosskarlbach, Germany

Joachim Fischer