Process for preparing a polyolefin pipe having inherent resistance to thermooxidative degradation
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United States of America Patent
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Issued Date -
Jul 26, 2012
app pub date -
Mar 30, 2012
filing date -
Aug 7, 2007
priority date (Note) -
Abandoned
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Abstract
A process for producing a pipe having improved resistance to thermooxidative degradation, the process comprising melting a polyolefinic molding composition in an extruder, extruding the molten molding composition through an annular die and subsequently cooling it, wherein the inner surface of the pipe is exposed to the action of a halogen-comprising treatment gas before or after cooling.
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