Powder comprising polymer-coated core particles comprising metals, metal oxides, metal nitrides or semimetal nitrides

US10479733B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Wolfgang Diekmann · Waltrop, DE
• Franz-Erich Baumann · Schneverdingen, DE
• Maik Grebe · Bochum, DE
• Kristiane Warnke · Recklinghausen, DE
• Sylvia Monsheimer · Haltern am See, DE

Key dates

• Filing date: Jun 29, 2012
• Grant date: Nov 19, 2019
• Expiry date: May 5, 2034

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/2998
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

Composite particles comprising core particles completely or partially coated with a precipitated polymer, where the d50 median diameter of the core particles is 1 μm or greater and the ratio of the d50 median diameter of the composite particles to the d50 median diameter of the core particles is 1.15 or greater, are provided. A method to prepare the particles includes dissolution of a polymer in a solvent and reprecipitation of the polymer in the presence of a suspension of the core particles. Further provided is a layer by layer moulding process employing the composite particles and mouldings obtained therefrom.