Aqueous solutions of direct dyes

Details Aqueous solutions of direct dyes Aqueous solutions of direct dyes

2006-05-08

2011-10-11

Douyon, Lorna M (Department: 1764)

Bleaching and dyeing; fluid treatment and chemical modification

Dye or potential dye composition, additive, treatment,...

Mixed dyes, noncomplexed

C008S636000, C008S639000, C008S115510, C008S116100, C008S919000, C008S921000, C162S162000

Reexamination Certificate

active

08034129

ABSTRACT:
The invention relates to an aqueous dye solution comprising a) 5 to 30% by weight of an anionic or cationic direct dye, b) 0.01 to 5% by weight of the compound of formula (1), in which M represents hydrogen, an alkali metal or alkaline earth metal, ammonium or ammonium, that is mono-, di-, tri- or tetra-substituted by C1-C4alkyl or C2-C4hydroxyalkyl or mixtures thereof, c) 0 to 10% by weight of an inorganic or an organic acid, d) 0 to 20% by weight of further additives and e) water to complete to 100%, with the proviso that direct dyes of the formula (2) in which K is a residue of a coupling component of the acetoacetanilide, pyridone, pyrazolone or pyrimidine series and M is as defined above, are excluded, a process for their preparation and the use thereof for dyeing paper.

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USPTO, Office Action dated Jan. 13, 2010 for Application No. 11/919,102 filed on Oct. 23, 2007.

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