EXPANDABLE BEADS BASED ON A POLYMER OF A VINYLAROMATIC COMPOUND CONTAINING BLOWING AGENT AND PLASTICIZER

摘要

The invention relates to expandable beads based on a polymer of a vinylaromatic compound containing a blowing agent and a plasticizer, wherein the plasticizer is an oligomer of styrene and/or alpha-methylstyrene having a number-average molecular weight (Mn) in the range of 200 to 500, that is used in an amount of 0.1 up to 2 wt.% (as calculated on the total weight of the beads); a process for preparing these expandable beads, and articles of expanded beads, obtainable by expanding and fusing these beads.