Expandable polystyrene beads

Details Expandable polystyrene beads Expandable polystyrene beads

C - Chemistry, Metallurgy

08

J

C08J 9/224 (2006.01) B65D 81/02 (2006.01) C08L 25/06 (2006.01) E04D 13/16 (2006.01)

Patent

CA 2255591

The invention relates to expandable polystyrene particles which contain foaming agents and are coated with 0.01 to 0.5 wt. % of a waterproofing agent which melts above 10°C and has an average particle size of less than 100 µm. The particles are processed to form moulded foam structures with a reduced water absorption capacity.

L'invention concerne des particules de polystyrène expansibles contenant des agents d'expansion, revêtues avec 0,01 à 0,5 % en poids d'un imperméabilisant qui fond au-dessus de 10 DEG C et présente une dimension moyenne des particules inférieure à 100 mu m. Ces particules peuvent être mises en oeuvre pour donner des corps moulés en mousse présentant une absorption d'eau réduite.

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