Evonik Roehm Gmbh

Evonik Degussa Gmbh

Evonik Rohm Gmbh

Karlsruher Institut Fur Technologie

Jiawen Zhou

Emmanouil Spyrou

Helmut Ritter

Friedrich Georg Schmidt

Stefan Hilf

Elke Gollan

Christopher Barner-Kowollik

Susanne Kreischer

Nathalie Guimard

Kim Klaus Oehlenschlaeger

Andre Hennig

André Hennig

Andrea Vöcker

Kim Klaus ÖHLENSCHLÄGER

The invention relates to low molecular mass products and to the use thereof as reversible or permanent low-temperature crosslinkers in Diels-Alder reactions.

Low molecular weight products and use thereof as reversible or permanent low-temperature crosslinking agent in Diels-Alder reactions

The present invention relates to innovative materials which are reversibly crosslinkable by means of a thermoreversible mechanism and/or whose viscosity is reversibly adjustable. Through the use of bishydrazones or conjugated bis-Schiff bases as diene components in aza-Diels-Alder reactions, functional materials are generated that feature controllable viscosity and/or reversible crosslinking.

Functional materials having a controllable viscosity or reversible crosslinking via aza Diels-Alder reactions with bishydrazones or conjugated bis-Schiff bases

The invention relates to the use of a powder made of a polymer, which of two or more components with functionalities suitable for Diels-Alder reactions, or of a powder mixture (dry blend) made of powders respectively of at least one of the reactive components, where these together enter into the Diels-Alder reaction with one another and are capable of a retro-Diels-Alder reaction, in a rapid-prototyping process. The invention further relates to moldings produced with use of said polymer powder through a layer-by-layer shaping process in which regions of a powder layer are melted selectively. The molding here can be removed from the powder bed after cooling and hardening of the regions previously melted layer-by-layer.

Polymer powder for producing three-dimensional objects

The present invention relates to innovative materials which can be crosslinked by means of two different crosslinking mechanisms, the first crosslinking mechanism being an irreversible crosslinking. The second crosslinking mechanism is a thermoreversible mechanism. As a result of this thermoreversible change in the arc length, properties of the crosslinked material can be decisively changed and controlled, including flexibility, elasticity and other mechanical properties, but also chemical properties, the gas permeability and vapor permeability and storage capacity of the network. In this way it would be possible, for example, to store energy sources such as fuels.

Materials having a controllable degree of crosslinking

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Moers, Germany

Jiawen Zhou