Composite filler particles and process for the preparation thereof

US10040969B2 · kind B2 · utility

Assignee

• Dentsply Sirona Inc. · US

Inventors

• Simon Stelzig · Radolfzell, DE
• Jörg Kempter · Konstanz, DE
• Stephanie Noerpel · Konstanz, DE
• Joachim E. Klee · Radolfzell, DE
• Andreas Facher · Gundetswil, CH
• Uwe Walz · Konstanz, DE
• Christoph Weber · Heidenheim, DE

Key dates

• Filing date: Oct 1, 2015
• Grant date: Aug 7, 2018
• Expiry date: Oct 1, 2035

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C03C2214/12
• WIPO field: Pharmaceuticals
• WIPO sector: Chemistry

Abstract

A process for the preparation of composite filler particles, comprising: (a) coating a particulate filler having a median particle size (D50) of from 1 to 1200 nm; (b) agglomerating the coated particulate filler, for providing a granulation of the coated particulate filler wherein the granulation contains the coated particulate filler particles whereby the at least one coating layer may be crosslinked by crosslinking groups obtained by reacting the reactive groups and optionally a further crosslinking agent.