Evonik Operations Gmbh

Isabel Wahl

Hans Bär

Felix Hofmann

Silke Schminke

Julian Blaesy

Elisabeth Ghulam

Alena-Davina Max

Manuel Seibel

A process can prepare a bio-resorbable polyester as a granulate or powder by bulk polymerization of one or more monomer(s). The process involves a) filling a monomer granulate, containing the one or more monomer(s), into a container; b) adding a polymerization catalyst and a chain length moderator on top of the monomer granulate; c) adding further monomer granulate on top; d) closing the container; e) carrying out a polymerization reaction in the closed container at a temperature in the range of 50° C. to 170° C., wherein a solid polymer in the form of a polymer block is formed; f) removing the polymer block from the container; and g) comminuting the polymer block to a granulate or powder; wherein the container is an unstirred container, wherein steps b) and c) are carried out once or are repeated, and wherein steps a) to e) are carried out under inert atmosphere.

Process for preparing a resorbable polyester as a granulate or powder by bulk polymerization

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Alzenau, Germany

Isabel Wahl