Basf Se Corporation

Carsten Sinkel

Robert Loos

Xin Yang

Gabriel Skupin

Andreas Künkel

Jörg Auffermann

Jerome Lohmann

Norbert Effen

Lars Börger

Kai Oliver Siegenthaler

Karlheinz Jochem

Ulf Küper

Mathias Zimmermann

Lars BÖRGER

The invention relates to a biodegradable polyester mixture comprising:

Biodegradable polyester mixture

The present invention relates to a process for complete anaerobic digestion of polymer mixtures of the composition:

Method for the complete anaerobic digestion of polymer mixtures

Disclosed is a biodegradable polyester mixture comprising 45 to 95 wt %, based on the total weight of polyester I and II, of a polyester I constructed from an aliphatic C-Cdicarboxylic acid or a C-Cdicarboxylic acid derivative; terephthalic acid or a terephthalic acid derivative; a C-Cdiol; an at least trihydric alcohol; and a chain extender. The biodegradable polyester mixture further comprises 5 to 55 wt %, based on the total weight of polyester I and II, of a polyester II constructed from an aliphatic C-Cdicarboxylic acid or a C-Cdicarboxylic acid derivative; terephthalic acid or a terephthalic acid derivative; a C-Cdiol; an at least trihydric alcohol; and a chain extender. The biodegradable polyester mixture further comprises 10 to 25 wt %, based on the total weight, of calcium carbonate; and 3 to 15 wt %, based on the total weight, of talc.

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Mannheim, Germany

Carsten Sinkel