公开(公告)号：US20180263862A1

公开(公告)日：2018-09-20

申请号：US15548227

申请日：2016-02-04

Applicant: DENTSPLY SIRONA inc.

Inventor： WALZ Uwe ,  Christoph WEBER ,  MAIER Maximillian

IPC: A61K6/00 ,  A61K6/02 ,  A61K6/08 ,  C01B33/20 ,  C09C1/30

CPC classification number: A61K6/0088 ,  A61K6/0008 ,  A61K6/0038 ,  A61K6/005 ,  A61K6/0073 ,  A61K6/0205 ,  A61K6/0235 ,  A61K6/024 ,  A61K6/0245 ,  A61K6/025 ,  A61K6/0255 ,  A61K6/08 ,  A61K6/083 ,  C01B13/20 ,  C01B33/20 ,  C01P2006/12 ,  C09C1/30 ,  C09C1/3081

Abstract: Process for the preparation of a particulate dental filler composition, comprising the following steps: (a) introducing a mixture containing (al) a silica precursor component, and (a2) a solution or dispersion of one or more compounds selected from compounds of aluminum, zinc, titanium, zirconium, tungsten, ytterbium, hafnium, bismuth, barium, strontium, silver, tantalum, lanthanum, tin, boron, and cerium, into a pulsed reactor; (b) converting the silica precursor component and the compounds into a particulate mixed oxide with a pulsed gas flow resulting from flameless combustion; (c) isolating the particulate mixed oxide from the pulsed reactor; (d) optionally subjecting the particulate mixed oxide to a heat treatment step; and (e) treating the optionally heat-treated particulate mixed oxide with a silane treatment agent for obtaining a particulate dental filler composition.