Expanded particles of modified polyethylene and foamed...

Details Expanded particles of modified polyethylene and foamed... Expanded particles of modified polyethylene and foamed...

C - Chemistry, Metallurgy

08

F

403/80

C08F 255/02 (2006.01) C08J 9/18 (2006.01) C08J 9/22 (2006.01) C08J 9/228 (2006.01)

Patent

CA 1269495

EXPANDED PARTICLES OF MODIFIED POLYETHYLENE AND FOAMED ARTICLES OBTAINED THEREFROM Abstract Expanded particles obtained by a method including the steps of: providing unexpanded particles formed of a polyethylene resin; impregnating the unexpanded particles with a liquid containing a polymerizable monomer including an acrylic monomer, and optionally a styrenic monomer; subjecting the impregnated polymerizable monomer to polymerization conditions so that at least a portion of the polymerizable monomer is grafted on the polyethylene resin to obtain modified polyethylene particles; and subjecting the modified polyethylene particles to an expansion treatment. Further expansion of the expanded particles within a mold gives a foamed article suitable for use as a consumable pattern in full mold casting.

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