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United States of America Patent
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Issued Date -
Oct 19, 2017
app pub date -
Oct 9, 2015
filing date -
Oct 17, 2014
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Abstract
This invention describes a polymer composition having reduced torque during processing comprising poly(ethylene terephthalate) (PET) and an internal additive, where the internal additive is a polyglycerol fatty acid ester having a degree of esterification of at least 70% and where the concentration of the internal additive is below 5 wt %. This invention further describes a use of said composition for packaging materials and a use of an internal additive in the processing of the polymer composition as a lubricant and/or an anti-blocker during processing of the polymer, where said internal additive is a polyglycerol fatty acid ester having a degree of esterification of at least 70% and 2-10 glycerol repeating units.
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