Coloration process

#This invention relates to a colouration process in particular to a process for colouring cellulose and wool textiles.

#It is now well-established to colour cellulose with dyestuffs containing groups which are believed to react to form a bond between dyestuff and hydroxyl groups of the cellulose. Many such dyestuffs are available having a wide range of groups capable of reacting with the cellulose such as haloheterocyclic compounds, e.g. fluoro-, chloro and bromo-s-triazinyl, chloro- and fluoro-pyrimidinyl, chloroquinoxaline and chloropyridazine. To obtain good levels of colouration it is usually found necessary to include a treatment with an acid-binding agent in the colouration process. The acid-binding agents are typically sodium bicarbonate, carbonate or hydroxide and are usually associated with an alkaline pH. Fixation is normally achieved at temperatures from 25.degree.-100.degree. C.

#Similar reaction can occur between these dyestuffs and amino groups in wool though an alkaline treatment is not usually employed in this instance since it is not necessary to ensure reaction and wool may be adversely affected by the alkaline conditions. Thus it is not usually possible to colour wool/cellulose blends satisfactorily with conventional reactive dyestuffs since each component requires conditions incompatible with those required by the other.

#Print pastes are prepared with the composition given in the following Table:

#______________________________________ 1 2 3 4 5 6 7 8 9 ______________________________________ Dyestuff 5 5 5 5 5 5 5 5 5 Water 45 25 43 23 44.5 24.5 42.5 22.5 22 Manutex F 50 50 50 50 50 50 50 50 50 (alginate thickener 10% aqueous soln.) Urea -- 20 -- 20 -- 20 -- 20 20 Nicotinic -- -- -- -- 0.5 0.5 0.5 0.5 1 acid Dicyan- -- -- 2 2 -- -- 2 2 2 diamide ______________________________________

#The dyestuff has the structure (in free acid form): ##STR9##