Process for preparing amine-modified polyester resins with improved melt flow
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United States of America Patent
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Apr 7, 2015
Grant Date -
Aug 1, 2013
app pub date -
Mar 14, 2013
filing date -
Jun 17, 2011
priority date (Note) -
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Abstract
The invention is directed to a process for preparing a linear or branched amine-modified thermoplastic resin with high flowability using as starting materials a linear or branched polyester and a primary or secondary aliphatic amine. The process does not require that the amine and polyester be combined in a liquid organic solvent during the process, and can be performed readily at ambient pressure. The amine-modified resins can be extruded and pelletized using normal operating conditions, making this process a versatile option for achieving a wide variety of viscosities in a simple, low cost, continuous operation.
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