IL33553A - Compositions and process for dyeing textile fibres of basic character - Google Patents

Description

and for dyeing textile basic of aliphatic hydrocarbons amongst ethyl and preferabl methylene chloride or The term a other than a halogenated aliphatic which is with both the aqueous phase and the halogenated hydrocarbo phase which brings about the formation of a mixture of aqueous and hydrocarbon The common solvent has to be a liquid and a boiling point below 130 The common solvent may for a monofunctional alcohol such as methanol or a a multifunctional compound such as The dyeing bath may contain than one aliphatic genated hydrocarbon and more than one common The may a mineral or organic acid and may be or or liquid or Examples are the various phosphoric formic acetic citric Where no common solvent is required homogenization is brought abou by an organic the bath may be composed a a halogenated methylene chloride and an organic acetic In specific cases the acidity may be provided by the stuff whe latter is common solvent or mixture of common solvents will be added in the amount required in order to produce a geneous liquid or in a slight excess over the strictly necessary The excess of the common solvent on the type of the dyeetuf and especially on its capacity of being take up from the The the acid and the solvent are saturated with the halogenated and according to the constitute a homogeneous parte of Acid Bed 57 sodium salt not are dissolved in a homogeneous solution consisting of 970 parts of water and 30 parts of methanol previouely ted with methylene Parts of pure formic acid are 40 parts of yarn for in the bath and the temparature is gradually At about the is practically completely the shade is not Heating is continued to a temperature and this temperature is maintained for about ten a red colour of the same shade and fastness is obtained as when dyeing in an acidic water bath at parts of Acid Orange 19 parts of Acid Red 57 parts Acid Blue 40 are dissolved in a homogeneous solution of 440 parts of water and 560 parts of methanol previously saturated with methylene One part of glacial acid is then 40 parts of polyamide yarn are then immersed under continuous stirring at ambient temperature the bath and maintained therein during about ten The dye is pletely exhausted from the bath and nice shade is obtained the fibres the fastness of which is the same as that obtained by dyeing in water at the It is not necessary to rinse the fibres after dyeing since after the drying they do not practically retain any acetic Examples 4 to 8 parts of Acid Blue 129 the form of the free acid are dissolved in parts by voluue of a solution 600 parts of 350 parts of acetic acid and 4 wool Example Kxample 6 polyuretiane fibres ized 7 on the basic of ype 8 polyamides 6 or fibres continuous yarns or textured are immersed in the bath for about JO then nearly completely exhausted from the bath and on all the fibres mentioned above beautiful blue resistant to washing and are It is not always necessary to rinse the dyed it raay be sufficient to dry If of acidity are left on the they are rinsed water made alkaline or with an organic Examples and 10 parts of Direct Bed 77 alkaline salt not are dissolved in 1 parts by volume of a solution comprising parts of parts of parts of methylene and 300 parts of acetic In this solution there are immersed at 4o of fibres having a basic character and especially difficult to dye for Example 9 acrylic fibres Example a tissue made from a continuous yarn strongly stretche barred and Then the bath is stirred and the fibres remain immersed in the colorations of good fastness The are rinsed with acetone for eliminating traces bars of On the tissues the are completely and The procedure of Example 3 ia repeated but methylene chloride is replaced by chloroform 50 The acid may also be replaced by phosphoric acid The dye is completely exhausted from the bath good in less than three minutes and the dyeing to A dyeing bath containing for each 1000 parts by 380 parts of 500 parts of 120 parts of methylene chloride is parte of one of the dyes listed below are dissolved in this Into this bath there are introduced at 40 parts of polyamide and the dyeing is effected at this temperature for about 15 minutes under Exhaustion Acid Yellow 61 Complete Acid Tellow Complete 15 Acid Red 25 Nearly complete 16 Acid Bed 225 Complete 17 Direct Red 77 Nearly complete Direct Blue 86 Nearly complete Direct Brown 59 Complete 20 Under the conditions as in the preceding 13 to 19 a bath containing parts of brightening agent 15 is completely 21 Δ bath analogous to that of to but containing one part of Acid Black 29 exhausted nearly completely in about hours at 22 With one part of Acid Black in a bath analogous to the preceding a complete exhaustion ia obtained in about hours at Example 23 Working under the same conditions as in Example 4 but using for the dyeing of wool the reactive dyeatuff obtained by condensation of the of with the desacetylated dyestuff resulting from o the coupling of a diazoic derivative of with the 5 the exhaustion is nearly complete and the degree of fixation of the dye is above 65 Example A padding bath ie prepared with 30 parts of the dyestuff Acid Blue 1 9 in the form of the free 5 parts of 900 parts of parte by volume of methylene chloride 40 parts by volume of methanol and 10 parts by volume of formic A polyamide tissue is padded in the bath heated to It ia then wound on to a roller and closed in a at a temperature of about The tissue is then rinsed with The amount of dyestuff contained in the water is very a nice blue coloration with good fastness and uniformity is 25 parts of Direct Blue 86 is dissolved in 1000 parts by volume of a mixture containing 900 parts of 10 of 10 parts of methylene chloride and parts of formic In this bath there are immersed under 40 parte of a amide yarn and the temperature is successively increased under pressure to After about half an hour at this temperature the dye is completely exhausted from the bath and a nice turquoise shade is The same colour is only Obtained fit about if the methanol or the methylene chloride both of them are insufficientOCRQuality

Claims (1)

1. homogeneous compoeition for the dyeing of textile fibres of basic comprising an anionic at least one halogenated aliphatic hydrocarbon having preferably 1 to 3 carbon and an the the hydrocarbon and the acid being in such relative proportions that the composition is in form of a homogeneous Composition according to Claim comprising at least one common solvent as herein Composition according to Claim wherein the common solvent is Compoeition according to Claim wherein the common solvent is an Composition according to Claim wherein the acid is acetic Composition according to any one of the preceding wherein the halogenated hydrocarbon methylene chloride or A process for the dyeing of fibres with basic wherein the fibres are treated in a bath with compositions accordin to any of Claims 1 to 6 in which the proportion of water is less than by at a temperature not exceeding A process for the dyeing of fibres with basic character wherein the fibres are treated in a bath with compositions according to any of Claims 1 to in which the proportion of water is weight at a of up to process for the dyeing of fibres with baoic wherein the fibres are treated with compoeitions according to any of Claims 1 to 6 in a padding bath at a temperature not exceeding insufficientOCRQuality