Patent Number: 6,342,540

Title: Method for producing water expandable styrene polymers

Abstract: A process prepares styrene polymers comprising water as sole blowing agent by mixing a polystyrene melt with water and with an emulsifying agent in an extruder, extruding the melt into a waterbath and pelletizing the cooled extrudate.

Inventors: Gluck; Guiscard (Mainz, DE), Hahn; Klaus (Kirchheim, DE), Dodel; Peter (Rhodt, DE)

Assignee: BASF Aktiengesellschaft

International Classification: C08J 9/16 (20060101); C08J 9/12 (20060101); C08J 9/00 (20060101); C08J 009/20 (); C08J 009/18 ()

Expiration Date: 01/29/2019