| abstract |
Process for the preparation of particles of prefoamed polystyrene, wherein the particle surface is coated with at least one water-absorbing polymer W, characterized in that: a) initially prefoamed particles of expandable polystyrene, wherein prefoamed particles having a bulk density according to DIN EN ISO 60 of 5 to 50 g / l receives, and b) only then coated the resulting particles with the water-absorbing polymer W. |