METHOD OF OBTAINING A PARTICULATE POLYMER

摘要

PCT No. PCT/EP97/03607 Sec. 371 Date Dec. 30, 1998 Sec. 102(e) Date Dec. 30, 1998 PCT Filed Jul. 3, 1997 PCT Pub. No. WO98/01501 PCT Pub. Date Jan. 15, 1998The present invention provides a process for preparing an expandable polymer of a vinyl aromatic monomer and a polar water adsorbing monomer. The monomers are partially polymerized and then suspended in water so that the resulting beads contain from 3 to 40 weight % water which act as the sole or a predominant blowing agent.