Divinylbenzene in expandable beads for cup molding

Details Divinylbenzene in expandable beads for cup molding Divinylbenzene in expandable beads for cup molding

1987-06-22

1987-11-24

Foelak, Morton

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

Synthetic resins

Cellular products or processes of preparing a cellular...

428 35, 521 56, 521146, C08J 918

Patent

active

047089687

ABSTRACT:
Copolymer beads made by suspension copolymerization of styrenic monomer with divinylbenzene under conditions such that the products had defined solubility, gel content, molecular weight and bead size characteristics which enabled their use (after impregnation with a blowing agent and pre-expansion) in molding into foamed cups over a much broader range of time and temperature and the resultant cups are stiffer per given weight than cups made from conventional polystyrenes utilized for making foamed cups. These advantages are realized without any sacrifice in cup appearance.

REFERENCES:
patent: 2848427 (1958-08-01), Rubens
patent: 2848428 (1958-08-01), Rubens

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