Use of water-soluble disazo dyestuffs for dyeing or printing synthetic textile material of polyamide or polyurethane fibers
AssigneeHoechst Aktiengesellschaft
InventorsHermann Fuchs, Klaus Filzinger
Life of this patent
Estimating the term…
Abstract
Use of a water-soluble disazo dyestuff of the formula ##STR1## in which R.sub.1 represents a hydrogen atom or the sulfonic acid group, R.sub.2 represents a chlorine atom or the methoxy group, and R.sub.3 and R.sub.4 each represents a hydrogen atom or a methoxy group, for the dyeing or printing of synthetic textile material consisting of or containing polyamide or polyurethane fibers, the dyestuff used yielding on the said fibrous material excellent, clear golden-yellow to orange dyeings or prints being distinguished by very good properties as to fastness to light and to wetting.
Claims5
A process for the dyeing or printing of a synthetic textile material consisting of or containing polyamide or polyurethane fibers, which comprises coloring the said textile material with a dyestuff of the formula ##STR10## in which R.sub.1 is hydrogen or --SO.sub.3 H, R.sub.2 is chlorine or methoxy, and R.sub.3 and R.sub.4 each is hydrogen or methoxy.
An aqueous dyebath for the dyeing of synthetic textile material consisting of or containing polyamide or polyurethane fibers, 1000 parts of which consisting of 0.01 to 20 parts of a dyestuff of the formula ##STR11## in which R.sub.1 represents hydrogen or the sulfonic acid group, R.sub.2 represents chlorine or methoxy, and R.sub.3 and R.sub.4 each represents hydrogen or methoxy, 0.05 to 10 parts of a usual dyeing auxiliary and 0.05 to 10 parts of a usual dispersing agent and, for adjusting the pH, 0.01 to 20 parts of an organic or mineral acid, and the pH value of the dyebath being from strongly acid to neutral.
An aqueous printing paste for the printing of synthetic textile material consisting of or containing polyamide or polyurethane fibers, 1000 parts of which consisting of 1 to 50 parts of a dyestuff of the formula ##STR12## in which R.sub.1 represents hydrogen or the sulfonic acid group, R.sub.2 represents chlorine or methoxy, and R.sub.3 and R.sub.4 each represents hydrogen or methoxy, 250 to 650 parts of a usual thickening agent, 1 to 50 parts of a usual printing auxiliary, 1 to 50 parts of a usual dispersing agent and, for adjusting the pH, 5 to 50 parts of a salt of a weak base and a strong mineral acid or an organic acid, the deficit to 1000 parts being made up by water or thickening agent, and the pH value of the printing paste being from strongly acid to neutral.
Dependencies are inferred from the claim text.