Process for the preparation of expandable styrene polymer partic

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

1976-12-01

1977-12-27

Foelak, Morton

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 25HB, 260 25FP, C08J 918

Patent

active

040654117

ABSTRACT:
A process for preparing expandable styrene polymer particles by using calcium hydroxide 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.

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patent: 2893963 (1959-07-01), Cleland et al.
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patent: 3442881 (1969-05-01), John et al.
patent: 3494879 (1970-02-01), Ackerman
patent: 3501426 (1920-03-01), Yu
patent: 3632288 (1972-01-01), Niechwiadowicz
patent: 3650992 (1972-03-01), Schwoegler
patent: 3832312 (1924-08-01), Wright

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