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:
Jun. 19, 2012
Filed:
Jul. 13, 2007
Francois Martin, St Foy d'Aigrefeuille, FR;
Jocelyne Ferret, Toulouse, FR;
Cedric Lebre, Toulouse, FR;
Sabine Petit, Bonneuil Matours, FR;
Olivier Grauby, Auriol, FR;
Jean-pierre Bonino, Pechabou, FR;
Didier Arseguel, Deyme, FR;
Alain Decarreau, Poitiers, FR;
Eric Ferrage, Toulouse, FR;
Francois Martin, St Foy d'Aigrefeuille, FR;
Jocelyne Ferret, Toulouse, FR;
Cedric Lebre, Toulouse, FR;
Sabine Petit, Bonneuil Matours, FR;
Olivier Grauby, Auriol, FR;
Jean-Pierre Bonino, Pechabou, FR;
Didier Arseguel, Deyme, FR;
Alain Decarreau, Poitiers, FR;
Eric Ferrage, Toulouse, FR;
Luzenac Europe SAS, Toulouse, FR;
Centre National de la Recherche Scientifique (C.N.R.S.), Paris, FR;
Abstract
The invention relates to a method for preparing a synthetic talc composition. According to said method, a kerolite composition is subjected to an anhydrous thermal treatment carried out at a pressure lower than 5 bar, from over a few hours up to over a few days, at a treatment temperature higher than 300° C. The invention also relates to a synthetic talc composition prepared in this way, the synthetic talc particles of the composition being exclusively of chemical formula —(Si)MgO(OH)— and identifiable, during X-ray diffraction, by the presence of a characteristic diffraction peak located at a distance of between 9.40-9.68 and corresponding to a plane (001). Said synthetic talc particles also have a thermally stable crystalline structure of stacked laminae, which is very similar to that of a natural talc and has a particle size smaller than approximately ten micrometers.