Process for producing expandable thermoplastic resin beads...

Details Process for producing expandable thermoplastic resin beads... Process for producing expandable thermoplastic resin beads...

C - Chemistry, Metallurgy

08

L

400/2055, 400/30

C08L 51/06 (2006.01) C08F 255/02 (2006.01) C08J 9/18 (2006.01)

Patent

CA 1120649

ABSTRACT OF THE DISCLOSURE A process for producing expandable thermoplastic resin beads with comprises suspending in an aqueous medium 20 to 70% by weight of polypropylene resin particles and 30 to 80% by weight of a vinyl aromatic monomer such as styrene, polymerizing the vinyl aromatic monomer in the presence of a polymerization catalyst to graft the vinyl aromatic monomer onto the backbone of polypropylene and, optionally, adding a cross-linking agent, to form graft-copolymerized thermoplastic resin beads, and introducing a blowing agent into the thermoplastic resin beads The resulting resin beads have excellent foamability and molding fusability, and a foamed shaped article having superior thermal stability can be prepared from these beads.

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