Expanded particles of modified polyethylene and foamed articles obtained therefrom
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United States of America Patent
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Sep 6, 1988
Grant Date -
N/A
app pub date -
Nov 4, 1986
filing date -
Nov 5, 1985
priority date (Note) -
Expired
status (Latency Note)
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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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