Particulate polystyrene containing blowing agent and having impr

Details Particulate polystyrene containing blowing agent and having impr Particulate polystyrene containing blowing agent and having impr

1984-06-21

1985-04-23

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 60, C08J 918, C08J 920

Patent

active

045131058

ABSTRACT:
Particulate polystyrene containing blowing agent and having improved expandability is based on polystyrene having a weight-average mean molecular weight of not more than from 130,000 to 180,000 and a molecular weight distribution curve in which the high molecular weight flank drops steeply. The expandable polystyrene particles are produced by polymerizing styrene in aqueous suspension in the presence of blowing agents and of chain transfer agents or styrene oligomers.

REFERENCES:
patent: 4086191 (1978-04-01), Hinselmann et al.
patent: 4228244 (1980-10-01), Rigler et al.
patent: 4459373 (1984-07-01), Hahn et al.

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