Process for the production of polycarbonate which is damaged to a particularly small extent by oxygen
OwnerStefan Westernacher, Wolfgang Ebert +10inventors
InventorsStefan Westernacher, Wolfgang Ebert, Klaus Fassbender, Bernd Willenberg, Andreas Frankenau, Hermann Kauth, Gary Conklin, Christoph Biedron, Melanie Mothrath, Uwe Hucks, Ute Wollborn, Claus-Ludolf Schultz
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Abstract
A process for producing polycarbonate is disclosed. The process entails using equipment having leakage rate less than 10−3 liter He×mbar/sec. The polycarbonate thus produced is characterized by its enhanced thermal stability.
Claims10
A process for the production of polycarbonate using equipment having leakage rate less than 10−3 liter He×mbar/sec.
A process for the production of a molded polycarbonate article comprising using equipment having leakage rate that is less than 10−3 liter He×mbar/sec.
An process for the production of an extruded article comprising using equipment having leakage rate that is less than 10−3 liter He×mbar/sec.
A process for determining a leakage rate in an apparatus comprising connecting a helium detector to the vapor lines of the apparatus, flushing all potential leaks with helium from a gas lance, and measuring the leakage using a detector.
Dependencies are inferred from the claim text.