| 摘要 |
<p>Process for the preparation of beads of expandable vinyl aromatic polymers by means of polymerization in aqueous suspension, which comprises polymerizing at least one vinyl aromatic monomer in aqueous suspension in the presence of a peroxide initiator system, active at a temperature higher than 800C, an expanding agent, and in the presence of : - an amide having the general formula R1CONHCH2 -CH2NHCOR2 (I) a flame retardant system comprising a brominated additive with a bromine content higher than 30% by weight.</p> |
