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

400/2027, 400/20

C08L 51/06 (2006.01) C08F 2/18 (2006.01) C08F 287/00 (2006.01) C08J 9/18 (2006.01)

Patent

CA 1120650

ABSTRACT OF THR DISCLOSURE A process for producing expandable thermoplastic resin beads which comprises suspending in an aquecus medium 20 to 70% by weight of a random copolymer of propylene and ethylene con- talnlng 1 to 10% by weight of ethylene and 99 to 90% by weight of propylene 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 the random copolymer and, optionally, adding a cross-linking agent, to form graft- copolymerlzed 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.

313437

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