Polymer blends with improved rheology and improved unnotched impact strength

This invention relates to a blend of biodegradable polymers comprising: (A) about 15% to about 60% by weight of at least one flexible biodegradable polymer (A) having a glass transition less than about 0 DEG C., (B) about 85% to about 40% by weight of at least one rigid biodegradable polymer (B) hav...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	HALE WESLEY R, TANNER CANDACE M
Format:	Patent
Sprache:	chi ; eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON COMPOSITIONS OF MACROMOLECULAR COMPOUNDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	This invention relates to a blend of biodegradable polymers comprising: (A) about 15% to about 60% by weight of at least one flexible biodegradable polymer (A) having a glass transition less than about 0 DEG C., (B) about 85% to about 40% by weight of at least one rigid biodegradable polymer (B) having a glass transition greater than about 10 DEG C.; said percentages being based on the total weight of the polymer blend; wherein said polymer blend has a unnotched Izod impact strength according to ASTM D256 of at least 9 ft-lbs/in at 23 DEG C. In one embodiment, the polymer blend has a unnotched Izod impact strength according to ASTM D256 at least 20 ft-lbs/in at 23 DEG C.