Process for preparing styrenic polymer particles

Details Process for preparing styrenic polymer particles Process for preparing styrenic polymer particles

1975-09-29

1978-04-18

Henderson, Christopher A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260 25HB, 526212, 526225, 526233, C08F25702

Patent

active

040851699

ABSTRACT:
Styrenic polymer particles having a substantially uniform particle size are prepared by suspending styrenic polymer particles having particle sizes in a certain range in water to provide an aqueous suspension and after adding to the suspension a styrenic monomer, a suspension polymerization catalyst and a polymerization retarder in an amount of 1/200 to 1/15 mole per 1 mole of the catalyst, conducting the suspension polymerization. By conducting the polymerization in the presence of a foaming agent, one can produce foamable styrenic polymer particles having a substantially uniform particle size.

REFERENCES:
patent: 2934530 (1960-04-01), Ballast
patent: 3423351 (1969-01-01), Pierce
patent: 3440219 (1969-04-01), Wolff
patent: 3696172 (1972-10-01), Kaiho
patent: 3736273 (1973-05-01), Hatano

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