Copolyamide powder and its preparation, use of copolyamide powder in a shaping process and mouldings produced from this copolyamide powder

US8591797B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Sylvia Monsheimer · Haltern am See, DE
• Maik Grebe · Bochum, DE
• Stefan Altkemper · Dorsten, DE
• Sigrid Hessel-Geldmann · Haltern am See, DE
• Franz-Erich Baumann · Schneverdingen, DE
• Kristiane Warnke · Recklinghausen, DE
• Heike Stemmer · Haltern am See, DE
• Joachim Muegge · Haltern am See, DE
• Michael Tuerke · Marl, DE
• Ulrich Simon · Kahla, DE

Key dates

• Filing date: Mar 19, 2009
• Grant date: Nov 26, 2013
• Expiry date: Mar 19, 2029

Classification

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

Abstract

A task often encountered in very recent times is the rapid provision of prototypes. Particularly suitable processes are those based on pulverulent materials and in which the desired structures are produced layer-by-layer through selective melting and solidification. The invention provides the constitution, production and use of a copolyamide powder which was produced using the following monomer units: a) laurolactam or ω-aminoundecanoic acid, and also b) dodecanedioic acid, and either c) decanediamine or dodecanediamine, in shaping processes, and also to moldings produced through a layer-by-layer process which selectively melts regions of a powder layer, using this specific powder. Once the regions previously melted layer-by-layer have been cooled and solidified, the molding can be removed from the powder bed. The moldless layer-by-layer processes for the production of components using the copolyamide powder result in simplified and more reliable conduct of the process and better recyclability.