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. 08, 2014
Filed:
Dec. 28, 2009
Thomas Eichenberger, Basel, CH;
Thomas Ruch, Delémont, CH;
Ralf Bauer, Rickenbach-Egg, DE;
Christoph Krebs, Prattein, CH;
Ursula Luterbacher, Reinach, CH;
Marc Maurer, Village-Neuf, FR;
Thomas Eichenberger, Basel, CH;
Thomas Ruch, Delémont, CH;
Ralf Bauer, Rickenbach-Egg, DE;
Christoph Krebs, Prattein, CH;
Ursula Luterbacher, Reinach, CH;
Marc Maurer, Village-Neuf, FR;
BASF SE, Ludwigshafen, DE;
Abstract
A process for preparing a black colorant, preferably a black pigment, characterized in that a compound of the Formula (I) is reacted with a compound of the Formula (II) in a molar ratio of 1:2, in the presence of a catalyst which in water at 25° C. has a pK≦4.5. For the definition of Rto R, refer to the description; preferably all are H. Likewise claimed are new crystal polymorphs obtainable by this process, and preferably single-phase mixed crystals. Also claimed are synergistic compositions. These compositions exhibit increased light stability in plastics stabilized with basic light stabilizers when they are pigmented with colorants of the invention rather than with known black pigments such as carbon black. The specification also relates, furthermore, to the use of the black colorants of the invention for coloring paints, printing inks and plastics in the mass, and to mulch film, instrument panels, woven fabrics, garden furniture items or elements for the construction industry that are pigmented with said colorants.