Method for the production of aliphatic polyesters
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United States of America Patent
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Jun 28, 2016
Grant Date -
Mar 5, 2015
app pub date -
Dec 10, 2012
filing date -
Dec 13, 2011
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Abstract
The present invention relates to a method for the production of aliphatic polyesters in a two-step method. There are thereby added, in a first step, to a precondensate of an aliphatic dicarboxylic acid or to a mixture of aliphatic dicarboxylic acids and an aliphatic dialcohol or to a mixture of aliphatic dialcohols, further monomeric components, i.e. further aliphatic dicarboxylic acids and also a further aliphatic dialcohol, a polyester prepolymer being obtained. In a further step, polycondensation of the prepolymer obtained in the first step is effected.
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