Method of dyeing wool with acid dyestuffs
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United States of America Patent
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Nov 11, 1986
Grant Date -
N/A
app pub date -
Sep 28, 1984
filing date -
Sep 29, 1983
priority date (Note) -
Expired
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Abstract
The invention provides a process for dyeing a textile substrate comprising wool fibres, which process comprises bringing the substrate into contact with an aqueous dyebath containing an acid dyestuff or a mixture of acid dyestuffs having (a) a build-up power on wool of from 90 to 98% at pH 4.5; together with (b) a migrating ability on wool of from 25 to 40%, at pH 4.5; (a) and (b) being determined under specific conditions, in the presence of a levelling agent which is the alkoxylation product of an amine substituted by a fatty saturated or unsaturated residue, the aqueous dyebath containing a mixture of acid dyestuffs when the substrate is a wool/synthetic polyamide fibre blend. These dyestuffs give level, fast and reproducible dyeings of a high quality.
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