The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 17, 2015
Filed:
Jun. 05, 2012
Friedrich Georg Schmidt, Haltern am See, DE;
Stefan Hilf, Rodenbach, DE;
Jiawen Zhou, Moers, DE;
Nathalie Guimard, Saarbruecken, DE;
Christopher Barner-kowollik, Stutensee, DE;
Kim Klaus Oehlenschlaeger, Hockenheim, DE;
Friedrich Georg Schmidt, Haltern am See, DE;
Stefan Hilf, Rodenbach, DE;
Jiawen Zhou, Moers, DE;
Nathalie Guimard, Saarbruecken, DE;
Christopher Barner-Kowollik, Stutensee, DE;
Kim Klaus Oehlenschlaeger, Hockenheim, DE;
Evonik Roehm GmbH, Darmstadt, DE;
Abstract
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.