A liquid dyestuff composition comprising from 4 to 50 wt % of a basic or cationic water soluble dyestuff, an organic or inorganic acid and 0.1 to 15.0 wt % of a phenolic derivative, the dyestuff having a solubility in water in the presence or absence of a phenolic derivative of at least 1 g/liter at a temperature of 25.degree. C. and the composition being made up to 100 wt % by water and optionally a water-miscible solvent and/or a dissolving auxiliary; a process of dyeing a substrate like paper with such composition; a powder or granulate form of such composition and the use of such a composition or powder or granulate thereof in a dyeing process.

Claims

10 · 1 independent · depth 3

10 granted claims

›1.independentA liquid dyestuff composition comprising from 4 to 50 wt % of a basic or cationic water soluble dyestuff, an acid, wherein said acid excludes phenolic…+9

›2.↳ 1Dyestuff composition as claimed in claim 1, wherein the phenolic derivative is chosen from the group consisting of resorcin, orcin, gallic acid, galli…d2+1

›4.↳ 1Dyestuff composition as claimed in claim 1, wherein the dyestuff is a cationic or direct basic dyestuff.d2

›5.↳ 1Dyestuff composition as claimed in claim 1, which further comprises a water-miscible solvent chosen from the group consisting of dimethylformamide, be…d2

›6.↳ 1Dyestuff composition as claimed in claim 1 wherein the acid is chosen from the group consisting of hydrochloric acid, sulfuric acid, phosphoric acid, …d2

›7.↳ 1A powder or a granulate formed from an aqueous composition as claimed in claim 1.d2+2

›8.↳ 1A process of dyeing a substrate comprising applying a liquid composition as claimed in claim 1 to the substrate, application of the composition being …d2

Classifications

21 codes

USPC · US Patent Classification

858/6852/6865/6858/5852/4852/8860/7863/3863/4842/6859/4858/8865/7865/5865/4861/1861/3852/7891/9861/8864/4

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1.6 y

595 days filing → grant

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Examiner

Yogendra Gupta

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