Process for the dyeing of wool
AssigneeHoechst Aktiengesellschaft
InventorsHans-Peter Maier, Harpal Singh
Life of this patent
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Abstract
Semi-continuous process for dyeing of flat woolen textile articles with 1:2 or 1:1 metal complex dyestuffs, by padding the textile material with an aqueous liquor containing the dissolved dyestuffs and of from 80 to 120 g/l of dissolved urea, at a temperature of from 60 to 80.degree. C. and batching it up without intermediate drying, optionally with further heating, and allowing it to dwell in this state at a temperature of from 75 to 85.degree. C. for a period of from 4 to 14 hours.
Claims3
In a process for the dyeing of flat textile articles made of wool or mixtures thereof with synthetic fibres by means of 1:2 or 1:1 metal complex dyestuffs in the presence of a hydrotropic substance, and fixation of the dyestuffs by means of a dwelling operation, the improvement which comprises:
- padding a web of said textile material with an aqueous liquor containing a solution of at least one of said dyestuffs together with 80 to 120 g/l of dissolved urea at a temperature in the range of from 60.degree. C. to 80.degree. C.;
- batching-up the padded material without intermediate drying;
- and allowing the batched-up material to dwell at a temperature in the range of from 75.degree. to 85.degree. C. for a period of from 4 to 14 hours.
Dependencies are inferred from the claim text.