Antimony-free and cobalt-free polyethylene terephthalate resin composition
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United States of America Patent
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Issued Date -
Jun 23, 2011
app pub date -
Dec 7, 2010
filing date -
Dec 18, 2009
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Abandoned
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Abstract
A polyethylene terephthalate (PET) resin composition features fast solid-state polymerization and low reproduction of acetaldehyde and cyclic oligomer when processed. In polymerization thereof, a titanium-containing compound is used as a catalyst for polycondensation, and a phosphoric stabilizer and an organic dye are introduced to prevent a yellowish hue of the resultant polyester, while a compound represented by the following formula (I) that contains phosphorus and calcium is added to accelerate solid-state polymerization of the PET pre-polymer and to endow the composed PET resin with better processability so that when processed for making a preform, the PET resin reproduces reduced acetaldehyde and cyclic oligomer.
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