Basf Aktiengesellschaft

Basf Se Corporation

Uwe Witt

Motonori Yamamoto

Gabriel Skupin

Klaus Hahn

Achim Stammer

Dietrich Scherzer

Frank Braun

Isidoor De Grave

Joachim Clauss

Guiscard Gl&uuml;ck

Robert Loos

Andreas Eipper

Gad Kory

Stefan Grutke

Carsten Weiss

Christof Mehler

Gunther Mair

Silke Biedasek

Ning Zhu

Martin Bussmann

Andreas Garbe

Günther Mair

Jörg Kohl

Dirk Starke

Dietmar Heufel

The invention relates to a device for synthesizing a polymer accompanied by separating a gaseous substance. Said device comprises: a reactor chamber () having a substantially circular cylinder-shaped upper section (), which is delimited by two circular surfaces () and a circumferential surface () and has a longitudinal cylinder axis, and a lower section (), the upper section () and the lower section () being connected to one another via the first circular surface (); an inlet opening (); a first outlet opening (), which is arranged in a wall of the lower section (); a second outlet opening (), which is arranged in the second circular surface () or in the circumferential surface () between the inlet opening () and the second circular surface (); and a removal device (), which is arranged so as to be movable along the longitudinal cylinder axis at least between the second circular surface () and the inlet opening (), and contacts the circumferential surface (). The invention further relates to a method comprising: feeding an oligomer melt () into a circular cylinder-shaped first section () of a reaction chamber () through an inlet opening () tangentially to a circumferential surface () of the first section (); polymerizing the oligomer melt () to form a polymer melt (); removing the polymer melt () from the reaction chamber () through a first outlet opening () of the reaction chamber (); and removing a gaseous substance () from the reaction chamber () through a second outlet opening () of the reaction chamber () above the inlet opening (). Deposits on at least one inner wall of the first section () of the reaction chamber () above the inlet opening () are removed by a removal device ().

Device for synthesizing a polymer with reduced formation of deposits in the reaction chamber

A process for the continuous production of a biodegradable polyester, where a mixture of aliphatic dihydroxy compounds, aliphatic and aromatic dicarboxylic acids or their liquid esters, and, optionally, further comonomers is mixed, without addition of a catalyst, to give a paste, and  The invention further relates to biodegradable polyesters obtained_by this process.

Method for the continuous production of biodegradable polyesters

The present invention relates to a process for the continuous production of polymer mixtures comprising:

Method for continuously producing polyester mixtures

A process for the continuous production of a biodegradable polyester, where The invention further relates to biodegradable polyesters obtained by this process.

A biodegradable thermoplastic molding composition comprises A process for preparing the molding composition is described, as is a process for producing moldings, films or fibers from the molding composition.

Biodegradable, thermoplastic molding materials

A process for reducing the water-vapor permeability of films or coatings made from polymer compositions (Q) comprising beeswax or comprising montan ester wax or comprising mixtures of these, by preparing a composition (Z) comprising Z ) from 40 to 98.5% by weight of at least one polymer compatible with the polymer (Q1) which is the basis of Q, Z ) from 0.5 to 20% by weight of starch or cellulose or a mixture of these as compatibilizer, Z ) from 1 to 20% by weight of beeswax or montan ester wax or a mixture of these, and Z ) from 0 to 20% by weight of at least one additive, where the percentages by weight are based on the total weight of Z, and in a second step combining the composition Z with the polymer (Q1) which is the basis of Q.

Method for reducing the permeability of films or coatings to water vapor

Biodegradable polyester material particles

Lactic acid polymers

Growing community of inventors

Mutterstadt, Germany

Uwe Witt