Plastic and nonmetallic article shaping or treating: processes – Carbonizing to form article – Agglomeration or accretion
Patent
1979-01-04
1980-06-24
Foelak, Morton
Plastic and nonmetallic article shaping or treating: processes
Carbonizing to form article
Agglomeration or accretion
2041592, 264 51, 264 54, 264 85, 264175, 264176R, 264319, 521 90, 521143, 521915, H05B 100, C08J 910
Patent
active
042094739
ABSTRACT:
A crosslinked, soft, flexible, closed-cell foam of suspension chlorinated high density polyethylene and a process for the preparation thereof, comprising admixing a high density suspension chlorinated polyethylene with a thermally decomposable chemical foaming agent at a temperature below the decomposition temperature of said foaming agent, molding the chlorinated high density polyethylene into desired form at a temperature below the decomposition temperature of the foaming agent, subjecting the molded chlorinated high density polyethylene to irradiation crosslinking at a temperature below the decomposition temperature of said foaming agent and contacting, in a substantially oxygen-free environment, the crosslinked chlorinated high density polyethylene with a heat transfer medium maintained at a temperature of from about 150.degree. C. to about 350.degree. C. for a period sufficient to form the desired product.
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Choo Tai-Sam
Foelak Morton
The Dow Chemical Company
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