Patent Number: 7,713,311

Title: Liquid direct dye formulations

Abstract: The present invention relates to aqueous liquid formulations comprising 5-30% by weight of a dye composition comprising 25-85% by weight of Direct Brown 44 15-75% by weight of Direct Yellow 11 and/or of a dye obtainable by reduction or thermal treatment of Direct Yellow 11 0-15% by weight of one or more blue direct dyes and 0-10% by weight of one or more red direct dyes all based on the dye composition 0.5-15% by weight of one or more alkylamines whose one, two or three alkyl radicals may each be substituted by one or two hydroxyl groups and/or amino groups and/or interrupted by one or two oxygen atoms in ether function, based on the total weight of the aqueous liquid formulation, the sodium content of the liquid formulation not exceeding 0.3% by weight, and also their use for dyeing cellulose material especially paper.

Inventors: Klopp; Ingo (Weisenheim, DE), Etzbach; Karl-Heinz (Frankenthal, DE), Reichelt; Helmut (Neustadt, DE)

Assignee: BASF Aktiengesellschaft

International Classification: C09B 67/36 (20060101)

Expiration Date: 5/11/12018