Basf Aktiengesellschaft

Harro Voss

Klaus Hahn

Erhard Stahnecker

Rupert Schick

Rolf Moeller

Walter Manfred

Isidoor DeGrave

Particulate styrene polymers containing blowing agents are prepared by a process in which an aliphatic hydrocarbon of 7 to 9 carbon atoms is added in an amount of from 0.01 to 0.5% by weight, based on the styrene polymer, before, during or after the polymerization. The particulate styrene polymers can be processed to foam blocks and moldings having a satisfactory smooth surface.

Styrene polymers containing blowing agents

Particulate expandable styrene polymers having short minimum molding times which are coated with from 0.005 to 0.5% by weight, based on the expandable styrene polymer, of a mono- and/or poly-urethane melting below 150.degree. C. and obtained by reaction of

Particulate expandable styrene polymers having short minimum molding

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Ludwigshafen, Germany

Harro Voss