Process for preparing expandible poly-styrene particles useful f

Details Process for preparing expandible poly-styrene particles useful f Process for preparing expandible poly-styrene particles useful f

1978-06-16

1979-09-25

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

521 98, 521131, 521907, C08J 912

Patent

active

041691938

ABSTRACT:
Expandible polystyrene particles useful for making molded bodies, particularly large blocks having a uniform cellular structure and a particularly short residence time in the mold, are prepared by polymerizing styrene in the presence of at least one ether having the general formula (III) or (IV): ##STR1## wherein: R.sub.1 and R.sub.2, which may be the same or different, are alkyl or cycloalkyl radicals and/or phenyl radicals, optionally halogen-substituted;

REFERENCES:
patent: 3271333 (1966-09-01), Eichhorn
patent: 3324076 (1967-06-01), Elder et al.
patent: 3401127 (1968-09-01), Stephenson
patent: 3576770 (1971-04-01), Evans et al.
patent: 3631132 (1971-12-01), Westemacher
patent: 3639302 (1972-02-01), Brown et al.
patent: 4029614 (1977-06-01), Nintz et al.

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