Basf Se Corporation

Norbert Effen

Maximilian Lehenmeier

Gabriel Skupin

Martin Bussmann

Motonori Yamamoto

Robert Loos

Jerome Lohmann

Timo Benjamin Witt

Johannes Klaus Sprafke

Michael Bernhard Schick

Carsten Sinkel

Andreas Kuenkel

Rainer Naef

Joerg Auffermann

The present invention relates to a process for producing a (co)polyester, wherein the (co)polyester at least partially consists of 1,4-butylene dicarboxylate units, in a degassing plant, wherein the crude (co)polyester is degassed in the presence of 0.1% to 5% by weight, based on the total weight of the input materials, of an entraining agent at a pressure between 5 to 300 mbar.

Method for preparing a (co)polyester

The present invention relates to a continuous process for purifying an aliphatic-aromatic polyester constructed from aliphatic dicarboxylic acids, aromatic dicarboxylic acids and aliphatic diols in a degassing apparatus, wherein the crude polyester is degassed for 3 to 30 minutes at a pressure of 0.01 to 5 mbar in the presence of 1% to 7% by weight, based on the total weight of the crude polyester, of an entraining agent.

Process for purifying an aliphatic-aromatic polyester

The invention relates to a continuous process for producing an aliphatic polyester constructed from aliphatic dicarboxylic acids and aliphatic diols comprising the steps of a) esterification, b) polycondensation and optionally c) chain extension, characterized in that during step b) in which the polycondenser functions as a degassing apparatus (B) and/or b') after the polycondensation in an additional degassing apparatus (B&#x2032;) the crude polyester is degassed at a pressure of 0.01 to 5 mbar in the presence of 1% to 7% by weight, based on the total weight of the crude polyester of water, introduced into the gas space of the degassing apparatus B and/or B&#x2032; as an entraining agent.

Continuous method for producing an aliphatic polyester

The present invention relates to an injection molded article comprising:

Injection-molded article containing surface-modified silicates

The present invention relates to a continuous process for purifying a chain-extended aliphatic polyester constructed from aliphatic dicarboxylic acids and aliphatic diols in a degassing apparatus, wherein the crude polyester is degassed for 3 to 30 minutes at a pressure of 0.01 to 5 mbar in the presence of 1% to 7% by weight, based on the total weight of the crude polyester, of an entraining agent.

Method for purifying an aliphatic polyester

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Ludwigshafen, Germany

Norbert Effen