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:
Apr. 17, 2018
Filed:
Jan. 09, 2007
Matthias Buri, Rothrist, CH;
Patrick A. C. Gane, Rothrist, CH;
Philipp Hunziker, Bern, CH;
René Burkhalter, Herzogenbuchsee, CH;
Beat Karth, Oberoenz, CH;
Matthias Buri, Rothrist, CH;
Patrick A. C. Gane, Rothrist, CH;
Philipp Hunziker, Bern, CH;
René Burkhalter, Herzogenbuchsee, CH;
Beat Karth, Oberoenz, CH;
Omya International AG, Oftringen, CH;
Abstract
The present invention consists of a process of preparation of at least one mineral matter and/or of at least one pigment, including a calcium carbonate made at once partially organophilic and partially hydrophilic, in which the carbonate is blended and/or ground and/or concentrated in an aqueous medium, in the presence of at least one salt of ethylene acrylic acid, one dispersing agent and/or one grinding aid agent, which is introduced before and/or during this treatment stage. Another object of the invention lies in the aqueous dispersions and suspensions of calcium carbonate thus obtained. They may be dried and the dry pigments obtained also constitute an object of the invention. Use of these aqueous dispersions and these dry pigments in the field of plastic, paints and paper constitutes another object of the invention.