The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 10, 2015
Filed:
Jan. 19, 2011
Julien Courtois, Ludwigshafen, DE;
Carsten Schips, Speyer, DE;
Petra Lutz-kahler, Weiterstadt, DE;
Willi Riegel, Waghäusel, DE;
Mohammed Abboud, Darmstadt, DE;
Julien Courtois, Ludwigshafen, DE;
Carsten Schips, Speyer, DE;
Petra Lutz-Kahler, Weiterstadt, DE;
Willi Riegel, Waghäusel, DE;
Mohammed Abboud, Darmstadt, DE;
BASF SE, Ludwigshafen, DE;
Abstract
The invention relates to a method for producing hollow bodies having freely displaceable particles enclosed in the hollow body, wherein a) a gel-forming liquid in which the particles are suspended is brought into a cross-linking bath, b) the gel cores that form are isolated, c) the cores are coated with a composition comprising sinterable material and a binder, and d) the coated cores are subjected to a heat treatment wherein the gel and the binder are expunged and the sinterable material is sintered into a closed shell. The gel forming material is, for example, sodium alginate, and the cross-linking bath comprises calcium ions. The particles are selected, for example, from ZrO, AlO, TiO, and SiOor mixtures thereof. The sinterable material is, for example, a metal powder such as carbonyl iron powder.