Evonik Degussa Gmbh

Degussa Aktiengesellschaft

Joachim Muegge

Franz-Erich Baumann

Maik Grebe

Sylvia Monsheimer

Thomas Schiffer

Wolfgang Christoph

Holger Renners

Ulrich Simon

Sigrid Hessel-Geldmann

Kristiane Warnke

Stefan Altkemper

Heinz Scholten

Dirk Heinrich

Heike Stemmer

Johannes Chiovaro

Michael Tuerke

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 &#x3c9;-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.

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

The present invention relates to polyamide powders suitable for cosmetic applications are described which have a pH of 4.0 to 7.0, cosmetic compositions containing the polyamide powders and processes of making the same.

pH-regulated polyamide powder for cosmetic applications

A composition containing from 88 to 99.99% by weight of a polyamide, a compound of a polyamide and mixtures of these, and from 0.01 to 0.25% by weight of a flow aid where the drying loss from the flow aid after 5 days of conditioning at a relative humidity of 95% is less than or equal to 1%, determined by ISO 787/2.

Polyamide powder with long-lasting, consistently good flowability

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Haltern am See, Germany

Joachim Muegge