PROCESS FOR PREPARING STABILIZED ALIPHATIC POLYESTER, AND COMPOSITIONS OBTAINED THEREWITH

The present invention relates to a process for the preparation of a composition comprising aliphatic polyester by ring-opening polymerization of cyclic ester monomers, said process comprising the steps of:(a) providing cyclic ester monomers and polymerization catalyst to a reactor,(b) melt polymeriz...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	GOBIUS DU SART, Gerrit, DE LANG, Wilko
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:	The present invention relates to a process for the preparation of a composition comprising aliphatic polyester by ring-opening polymerization of cyclic ester monomers, said process comprising the steps of:(a) providing cyclic ester monomers and polymerization catalyst to a reactor,(b) melt polymerizing said cyclic ester monomers to form a composition comprising aliphatic polyester,(c) stabilizing the composition against aliphatic polyester depolymerization by incorporating therein or applying thereto at least one stabilizing agent, thereby obtaining a melt-stable composition, and(d) optionally removing at least a portion of the residual cyclic ester monomers;wherein said stabilizing agent is a compound of formula (I)wherein R1, R2, R3, m ,R4 , R5, and R6 are as defined in the claims. The present invention also relates to a process for stabilizing an aliphatic polyester against depolymerization comprising the steps of (a) forming an aliphatic polyester, and (b) stabilizing the polyester against depolymerization by incorporating therein or applying thereto at least one stabilizing agent, thereby obtaining a melt-stable polyester, wherein said stabilizing agent is a compound of formula (I). The present invention also relates to the use of a compound of formula (I) as a stabilizing agent against aliphatic polyester depolymerization.