Process for producing particles of expandable styrene polymers a

Details Process for producing particles of expandable styrene polymers a Process for producing particles of expandable styrene polymers a

1975-08-12

1977-04-26

Foelak, Morton

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 25B, 260878R, C08J 922

Patent

active

040200221

ABSTRACT:
Polymers of styrene or copolymers thereof with monomers copolymerizable therewith are obtained in the form of expandable particles by polymerizing the styrene or mixture of monomers comprising styrene in the presence of an elastomeric olefinic copolymer or terpolymer, incorporating an expanding agent during or after the polymerization, ageing the preexpanded particles, and molding the pre-expanded and aged particles in a pressure-resistant mold which is not gas tight to obtain molded articles having very desirable characteristics.

REFERENCES:
patent: 3468820 (1969-09-01), Buchholtz et al.
patent: 3558534 (1971-01-01), Niechwiadowicz et al.
patent: 3657163 (1972-04-01), Kishikawa et al.
patent: 3682844 (1972-08-01), Schwoegler et al.

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