GRAFTED POLYMERS OF LACTIC ACID AND PROCESS FOR PREPARING THEREOF

The present invention relates to lactic acid polymers grafted to hydroxyl polymers of the general formula I wherein: polymer is a polymeric chain of a polymer with hydroxyl groups being selected from the group comprising natural polymers, such as cellulose, starch, dextran, aragose and derivatives t...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	RYPACEK FRANTISEK RNCSC, LENFELD JIRI CSC, BENES MILAN CSC
Format:	Patent
Sprache:	cze ; eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	The present invention relates to lactic acid polymers grafted to hydroxyl polymers of the general formula I wherein: polymer is a polymeric chain of a polymer with hydroxyl groups being selected from the group comprising natural polymers, such as cellulose, starch, dextran, aragose and derivatives thereof, or from the group comprising synthetic polymers containing vinyl alcohol, 2-hydroxyethylmethacrylate and 2,3-dihydropropylmethacrylate monomeric units and n is 5 to 1000. The grafted lactide polymers can be used when preparing mixtures and composites of lactic acid polyesters (and other polyesters of natural aliphatic hydroxy acids) with polar hydroxyl polymers (natural polymers, such as starch, cellulose, dextran, aragose and derivatives thereof and synthetic polymers containing vinyl alcohol, 2-hydroxyethylmethacrylate and 2,3-dihydropropylmethacrylate monomeric units). These mixtures and composites are completely or partially biologically degradable.