US2364726A - Process for improving the dyeings and prings prepared with watersoluble dyestuffs - Google Patents

Description

memes Dec. 12, 1944 rnocnss ron nurnovme 'rnn Dramas AND rnm'rs PREPARED wrrn warn-a- SOLUBLE nrss'rurrs Albert Landolt, Riehen, and Andreas Ruperti,

Arlesheim, Switzerland, assignors, by memo aasignments, to the firm Ciba Products Corporationt Dover, Del.

No Drawing. Original application October 13,

1939, Serial No. 299,390. Divided and this application June 12, 1940, Serial No. 340,200. In Switzerland December 21, 1938 A Claims.

This application is adivision of our application for Letters Patent Ser. No. 299,390, filed October 13; 1939.

It is known that the wet-fastnesses of dyeings pie, with baths which contain copper salts in addition to salts of high-molecular organicbasic compounds: if required, the dry treatment at raised temperatures may also hereupon take and prints, which have been prepared with the 5 place. help of water-soluble dyestuifs, may be increased As suitable copper salts, copper sulphate, copby aftertreatment with high-molecular organic per nitrate, copper chloride, copper acetate, etc., compounds, if necessary in the form of their salts. may be mentioned. A's high-molecular compounds come inter alia in Example 1 question those which are prepared by condensation of formaldehyde with compounds containing A ot 0 inen fabric is dyed on the jig with nitrogen. The latter may be capable or incapable Direct y Blue GS (Schultz, 5 0) rinsed of being hardened, and squeezed or hydro-extracted. The still moist Among the high-molecular formaldehyde conmaterial is Padded on the mangle F densation products may be mentioned such as Perflture ugh a solution containing D litre are derived from formaldehyde and nitrogen- 30 gms of ahydrophobic mel mine formaldehyde containing compounds such as melamine, gua condensation product (obtained from 1 mo] d e. ua y u e urea, d cy In melamine and 6 mols formaldehyde), soluble this connection, compare U. S. patent specificain water in t ratio of 1;1 tions Nos. 2,093,651, 2,169,546 and 2,106,938. 10 cm. formic id,85% and Among the condensation products containing 1 o 5 gms copper hloride, or the equivalent nitrogen, those are particularly valuable which quantity of another copper Salt, such as copper are obtained by the condensation of formaldeformate or copper t t After drying, th hy e th Compounds which contain least once I fabric is subjected to a hardening treatment the group over heated cylinders for /2 minute at 130 c. N-- The treated dyeing possesses very good fastness ('3=N to light in addition to exceptional fastness to water and perspiration. By subsequent wash- N ing with soap and soda, the fastness to light is u p du a f r xampl m lam ne, suani- 3 not decreased, so that here a permanent imdine, guanyl urea, dicyandiamide, already men- -provement in this property is concerned. tioned.

This aftertreatment may consist of a simple In place of Direct sky Blue many other dyestuffs may be used, giving thesame result. wet treatment 1n baths which contain the prod- Among these may be mentioned Direct Blue RW ucts concerned. It may also consist of a wet (Schultz No. 507), Direct Brown M (Schultz No. treatment combined with a subsequent dry treat a 412), Chlorantine Fast Brown BRLL (Schultz ment at raised temperature, 1f formaldehydevol. 2, page 48), Chlorantine Fast V1o1et 2R1L, condensation products which are capable of being Chlorantine Fast Yellow 4GLL, Chlorantine Fast hardened are used as high-molecular organic ba- Orange TSRLL, Chlorantine Fast Grey 2BLL (all 810 compounds, whereby the fastness to wet Schultz su vol 1 e 79) treatment, in particular the fastness to washing, Dag as a rule is still further improved. In both cases, Example 2 ggg gg gfig g m light may be unfavwr' A material composed of 70% wool and 30% 5 viscose-rayon staple fibre is dyed by known meth- It has now been found that this disadvantage Dds with 4% Chlorantine Brown BRLL (Schultz, may be eliminated if an aitertreatment with copsupp. vol. 1, page 79) rinsed, hydro-extracted, per salts is combined with the aftertreatment and impregnated at room temperature with a with the aqueous solution of the high-molecular solution contamin litre condensation products from formaldehyde and g per nitrogen-containing compounds. These com- 30 parts by weight of a, y a d o mflldebined treatments can be carried out one after hyde condensation product, obtained by conthe other in any desired order; it is however, densation of 2'mols dicyandiamide with 3 mols preferable to unite them, so that the dyeings commercial formaldehyde and the prints are treated at the same time with 15 parts by weight of formic acid 85% and the organic and the copper compounds, for exam- 5 parts by weight of copper chloride,

ened for 1 hour at 90 C. Adyeing possessing good fastness properties is obtained.

Example 3 A dyeing of Chlorantine Fast Orange TGLL on cotton material is impregnated with a solution containing per 100 parts water, 16 parts dimethylol-urea, 1 part ammonium phosphate, and 1 part copper chloride (the parts being by weight) and is then dried at 110 (2., whereby the fastness of the dyeing to wet treatments is increased by the high-molecular compound formed. When the thus aftertreated dyeing is exposed to light, it exhibits a better fastness to light than a dyeing aftertreated in the same manner but with exclusion of the copper salt.

A similar result is obtained when Chlorantine Fast Orange TGLL is replaced by Chlorantine Fast Bordeaux B or by Chlorantine Fast Blue 3RLL.

What we claim is:

1. Improvement in the process of increasing the i'astness properties of dyeings and prints, which have been obtained by means of a watersoluble dyestufi and aftertreatment with a highmolecular organic compound, produced by condensation of formaldehyde with a compound containing at least once the group N... N=Cq consisting in combining the aftertreatment with a simultaneous treatment with a solution of a copper compound in the same bath.

2. Improvement in the process of increasing the fastness properties of dyeings and prints, which have been obtained by means of a water-soluble dyestufi and aftertreatment with a high-molecular organic compound, produced by the condensation of formaldehyde with melamine, consisting in combining the aftertreatment with a simultaneous treatment with a solution of a copper compound in the same bath.

3. Improvement in the process oi increasing the i'astness properties of dyeings and prints, which have been obtained by means of a water-soluble dyestufl. and aftertreatment with a high-molecular organic compound, produced by condensation of formaldehyde with a compound containing at least once the group solubie dyestufls and aftertreatment with a high- 4 molecular organic compound, produced by the condensation of formaldehyde with melamine, consisting in combining the aftertreatment with a simultaneous treatment with a solution of a copper compound in the same bath, and then subjecting the material thus treated to a dry treatment at raised temperature.

5. A textile colored witha water-soluble dyestufl and aftertreated simultaneously with a highmolecular organic compound, produced by condensation of formaldehyde with a compound containing at least once the group and with a solution of a copper compound, the wet-fastness of the aftertreated textile being superior and the light fastness thereof being of a magnitude at least equal to that of the untreated colored textile.

ALBERT LANDOLT.

ANDREAS RUPER'II.