Polymer powder for producing three-dimensional objects

US8981010B2 · kind B2 · utility

Assignee

• Evonik Röhm GmbH · DE

Inventors

• Friedrich Georg Schmidt · Haltern am See, DE
• Stefan Hilf · Rodenbach, DE
• Jiawen Zhou · Shanghai, CN
• Nathalie Guimard · Zürich, CH
• Christopher Barner-Kowollik · Blankenloch, DE
• Kim Klaus Oehlenschlaeger · Hockenheim, DE

Key dates

• Filing date: Jun 5, 2012
• Grant date: Mar 17, 2015
• Expiry date: Jun 5, 2032

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B33Y70/10
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

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.