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:
May. 02, 2017
Filed:
Nov. 25, 2009
Wilfried Aichele, Winnenden, DE;
Jochen Rager, Bisingen, DE;
Klaus Czerwinski, Heimsheim, DE;
Eberhard Grath, Immenstadt, DE;
Josef Arnold, Immenstadt, DE;
Eva Weisser, Waiblingen, DE;
Wilfried Aichele, Winnenden, DE;
Jochen Rager, Bisingen, DE;
Klaus Czerwinski, Heimsheim, DE;
Eberhard Grath, Immenstadt, DE;
Josef Arnold, Immenstadt, DE;
Eva Weisser, Waiblingen, DE;
ROBERT BOSCH GMBH, Stuttgart, DE;
Abstract
In a method for preparing an ester from an hydroxybenzoic acid and a fatty alcohol for use in a binder system for powder injection molding, transesterification of an ester of the hydroxybenzoic acid and a low alcohol using the fatty alcohol is carried out, the fatty alcohol and the ester of the hydroxybenzoic acid and the low alcohol forming a reaction mixture and being used in an essentially equimolar ratio. The transesterification is carried out at a temperature at which the ester of the hydroxybenzoic acid and the low alcohol and the fatty alcohol are present as a homogeneous melt. The binder system for a powder injection molding contains 80 to 98 wt. % of a metal powder and/or a ceramic powder and 1 to 19 wt. % of a polymeric binder component, and 1 to 19 wt. % of at least one ester prepared by the transesterification.