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:
Aug. 27, 2019
Filed:
Jun. 02, 2010
Volker Lischewski, Bitterfeld-Wolfen, DE;
Christoph Roth, Halle, DE;
Michael Felicetti, Halle, DE;
Katrin Schwager, Dessau, DE;
Volker Lischewski, Bitterfeld-Wolfen, DE;
Christoph Roth, Halle, DE;
Michael Felicetti, Halle, DE;
Katrin Schwager, Dessau, DE;
Sensient Imaging Technologies GmbH, Bitterfeld-Wolfen, DE;
Abstract
The invention relates to spray-dried, washfast dye compositions, preferably in the form of pigment powders, having a bleeding rate of ≤0.5% and consisting of water-soluble functional dyes, preferably food dyes, which are firmly incorporated in a silica matrix. Apart from low bleeding of dye, these compositions are remarkable for their high stability to pH changes and/or ascorbic acid. The invention is also directed to the production of the dye compositions and the use thereof. The dye compositions are preferably employed in coloring foods, cosmetics, pharmaceutical products, but also in other uses.