Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – By mechanically introducing gas into material
Reissue Patent
2006-02-28
2006-02-28
Kuhns, Allan R. (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
By mechanically introducing gas into material
C264S053000, C264S054000, C264SDIG005, C521S079000, C521S139000
Reissue Patent
active
RE038993
ABSTRACT:
There is disclosed a process for producing alkenyl aromatic foams utilizing a combination of atmospheric and organic gases as blowing agent, preferably using greater than 30% by weight of atmospheric gas, and preferably also using a predetermined about of a masterbatch mix comprising a styrenic polymer, a rubbery block copolymer, and a solid blowing agent. Also disclosed are alkenyl aromatic foams produced by the process which exhibit increased densities, increased thermoforming capabilities, increased post-expansion properties, and increased retainment of the atmospheric and organic gases.
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Reedy Michael E.
Rider, Jr. Edward W.
Clifford Chance (US) LLP
Genpak Corporation
Kuhns Allan R.
Reedy International Corporation
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