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. 13, 2013
Filed:
Mar. 11, 2010
Allan Francis Cunningham, Magden, CH;
Céline Hossenlopp, Mulhouse, FR;
Heinz Schneider, Muttenz, CH;
Rainer Hans Traber, Reinach, CH;
Horst Herrmann, Lörrach, DE;
Michael Jacquier, Binzen, DE;
Allan Francis Cunningham, Magden, CH;
Céline Hossenlopp, Mulhouse, FR;
Heinz Schneider, Muttenz, CH;
Rainer Hans Traber, Reinach, CH;
Horst Herrmann, Lörrach, DE;
Michael Jacquier, Binzen, DE;
BASF SE, Ludwigshafen, DE;
Abstract
The present invention relates to an aqueous direct dye formulation, comprising (a) 5 to 25% by weight of a dye composition comprising (a1) 50-99% by weight of one or more dyes obtainable by reduction or thermal treatment of Direct Yellow 11, and (a2) 1-50% by weight of a blue, black and/or red direct dye, (all based on the dye composition); (b) up to 0.9% by weight of a saturated, cyclic or acyclic water-soluble amine comprising a primary, secondary or tertiary amino group and at least one further functional group selected from primary, secondary and tertiary amino groups, OH groups and ether groups; and (c) up to 0.9% by weight of urea; and (d) water, wherein the percentages for (a), (b), and (c) relate to the total weight of the aqueous direct dye formulation. The invention moreover relates to a process for their preparation and the use thereof for the dyeing, in particular of paper, as well as paper which has been dyed with this aqueous direct dye formulation.