High intrinsic viscosity melt phase polyester polymers with acceptable acetaldehyde generation rates

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United States of America Patent

PATENT NO 8987408
APP PUB NO 20140021652A1
SERIAL NO

14038832

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Abstract

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A method for the production of solid polyester polymer particles comprising:

    a) polycondensing a molten polyester polymer composition in the presence of a polycondensation catalyst composition comprising antimony species;b) continuing the polycondenzation of the molten polyester polymer composition to an It.V. of 0.68 dL/g or more; andc) after reaching an It.V. of 0.68 dL/g or more, adding a catalyst stabilizer or deactivator to the polymer melt; andd) after reaching an It.V. of 0.68 dL/g or more, solidifying the melt into solid polyester polymer particles which do not contain organic acetaldehyde scavengers.

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Patent Owner(s)

Patent OwnerAddress
ALPEK POLYESTER S A DE C VSAN PEDRO GARZA GARCÍA NUEVO LEÓN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Jernigan, Mary Therese Kingsport, US 36 397

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