Process for the preparation of expandable styrene polymer...

Details Process for the preparation of expandable styrene polymer... Process for the preparation of expandable styrene polymer...

C - Chemistry, Metallurgy

08

J

403/60, 403/76,

C08J 9/18 (2006.01) C08L 25/04 (2006.01)

Patent

CA 1049199

ABSTRACT OF THE DISCLOSURE A process for preparing expandable styrene polymer particles by using magnesium oxide as a suspending agent to pre- vent agglomeration of styrene polymer particles during impregna- tion with an expanding agent. The process comprises preparing expandable styrene polymer particles from styrene polymer par- ticles in water, wherein the expanding agent (which does not dis- solve 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.

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