Polyester, Process for Producing Polyester, and Polyester Molded Article
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United States of America Patent
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Issued Date -
Mar 26, 2009
app pub date -
Sep 12, 2006
filing date -
Sep 14, 2005
priority date (Note) -
Abandoned
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Abstract
Disclosed is a polyester produced from an aluminum compound and a phosphorus compound in the presence of a polycondensation catalyst. The polyester contains a polyester-insoluble, aluminum-containing insoluble particle in an amount of 1000 ppm or less as quantified by the method disclosed in the description, and contains an acid terminal group at a ratio of 10 to 50 eq/ton. The polyester can provide a highly transparent molded article produced through drawing (e.g., a film or hollow molded article) and is useful in the fields of highly transparent optical films, ultra-highly transparent molded articles or the like.
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