Process for producing polystyrene foam

Details Process for producing polystyrene foam Process for producing polystyrene foam

1994-08-26

1995-04-04

Foelak, Morton

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521 79, 521 81, 521 92, 521 98, 521139, C08J 900

Patent

active

054038650

ABSTRACT:
The present invention relates to a process to produce polystyrene foam comprising mixing a predetermined amount of masterbatch mix and a styrenic polymer, heating this mixture, injecting CO.sub.2 and/or nitrogen, in gas or liquid form, as a blowing agent and subsequently extruding, cooling and drying the resulting polystyrene foam.

REFERENCES:
patent: 5218006 (1993-06-01), Reedy et al.
patent: 5302624 (1994-04-01), Reedy et al.
patent: 5342857 (1994-08-01), Reedy et al.

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