Novel Method for Purifying Polyesters
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United States of America Patent
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Jan 7, 2016
app pub date -
Feb 25, 2014
filing date -
Feb 26, 2013
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Abstract
The invention relates to a method for purifying a polyester including impurities, said impurities including at least 0.1% by weight of a polyester or of residual monomer(s), including at least one step of: (ii) adding, to the polyester in a solvent, a functionalized material selected between a PAMAM dendrimer and a resin functionalized by one or more primary and/or secondary amine functions. Said method enables a low level of residual monomer(s) to be obtained while providing economically and environmentally advantageous reaction conditions.
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