Organic compounds
AssigneeSandoz Ltd.
InventorsRolf Gross, Rene Fricker
Life of this patent
Estimating the term…
Abstract
Disclosed is a liquid dye concentrate for dilution down to form a dyebath for the dyeing of blend substrates comprising acid and cationic dyeable fibres, which concentrate comprises at least one acid dye, at least one cationic dye and, as auxiliary agents, a nonionic or anionic polyglycol ether, or a mixture thereof, and a cationic, amino group containing polyglycol ether, other preferred optional additives being a low molecular weight carboxylic acid, such as acetic or formic, and one or more aliphatic C.sub.6-16 alcohols, particularly for viscosity stabilization and/or foam inhibition. Also disclosed is a dyeing process employing such a concentrate in dilute form.
Claims28
A stable liquid dye concentrate comprising (1) at least one acid dyestuff, (2) at least one cationic dyestuff, (3) a nonionic or anionic polyglycol ether or mixture thereof, and (4) a cationic amino group-containing polyglycol ether, said dyestuffs comprising 5 to 50% by weight of said concentrate and said polyglycol ethers comprising 10-50% by weight of said concentrate.
Dependencies are inferred from the claim text.