Plastic and nonmetallic article shaping or treating: processes – Pore forming in situ – By mechanically introducing gas into material
Reexamination Certificate
2006-03-07
2006-03-07
Kuhns, Allan R. (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
Pore forming in situ
By mechanically introducing gas into material
C264S053000, C264SDIG050
Reexamination Certificate
active
07008578
ABSTRACT:
A method for production of an extruded, polystyrene-based foam plate wherein a polystyrene-based resin is heated and kneaded together with a blowing agent, a flame retardant and a nucleating agent in an extruder to obtain a foamable molten composition, and the foamable molten composition is extruded through a die attached to an end of the extruder into a lower pressure zone. The blowing agent comprises not smaller than 25% by weight but not greater than 65% by weight, based on the total weight of the blowing agent, of an isobutane-containing saturated hydrocarbon; not smaller than 5% by weight but not greater than 70% by weight, based on the total weight of the blowing agent, of a dimethyl ether-containing ether; not smaller than 5% by weight but not greater than 55% by weight, based on the total weight of the blowing agent, of carbon dioxide; and 0–25% by weight, based on the total weight of the blowing agent, of other blowing agent components.
REFERENCES:
patent: 5182308 (1993-01-01), Voelker et al.
patent: 5453454 (1995-09-01), Alicke et al.
patent: 5688832 (1997-11-01), Paquet et al.
patent: 6197233 (2001-03-01), Mason et al.
patent: 6225364 (2001-05-01), Chaudhary et al.
patent: 6303667 (2001-10-01), Kruecke
patent: 6310112 (2001-10-01), Vo et al.
patent: 6315932 (2001-11-01), Fujiwara et al.
patent: 6440241 (2002-08-01), Mason et al.
patent: 6569912 (2003-05-01), Oohara et al.
patent: 6696504 (2004-02-01), Hayashi et al.
patent: 2003/0042644 (2003-03-01), Gokuraku et al.
patent: 1024163 (1998-04-01), None
Imanari Daisuke
Kogure Naochika
Naito Masato
Nishiyama Noritoshi
Bacon & Thomas PLLC
JSP Corporation
Kuhns Allan R.
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