Process for preparing expandable styrene polymer particles

Details Process for preparing expandable styrene polymer particles Process for preparing expandable styrene polymer particles

1975-10-29

1977-09-20

Foelak, Morton

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 25HB, C08J 918

Patent

active

040495949

ABSTRACT:
A process for preparing expandable styrene polymer particles by using magnesium oxide as a suspending agent to prevent agglomeration of styrene polymer particles during impregnation with an expanding agent. The process comprises preparing expandable styrene polymer particles from styrene polymer particles in water, wherein the expanding agent (which does not dissolve styrene polymer particles or slightly swells the particles, and has a boiling point lower than the softening point of the particles) is added in the presence of the suspending agent and the particles being impregnated thereby.

REFERENCES:
patent: 3117941 (1964-01-01), Knoblock et al.
patent: 3558534 (1971-01-01), Niechwiadowicz et al.
"Smith's College Chemistry", by Wm. Ehret, p. 519.
"Polymerization of Olefins and Diolefins in Suspension and Emulsion Part I", by Hohenstein et al., J.P.O.S., Jan. 16, 1946, pp. 127-145.

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