DE1619464B - Process for coloring mixtures of cellulose and polyester fibers with reactive and disperse dyes - Google Patents

Description

It is known that reactive dyes can be used in an alkaline medium, e.g. B. using alkali hydroxides or alkali salts of weak organic acids, fix on cellulose fiber materials. In practice, when dyeing or printing with reactive dyes, an excess of alkalis or Alkali-generating chemicals are applied. When using alkali hydroxides or alkali carbonates As a result, the pH value remains constant during the entire fixing process. Using of alkali bicarbonates, the pH value rises sharply shortly after the start of the fixing process, up to a limit value is achieved, which is retained until the end of the fixing process.

Difficulties in dyeing with reactive dyes arise when you mix mixtures of Cellulose fibers with z. B. polyester fibers at the same time wants to dye with reactive and disperse dyes, as the dyeing conditions for the different Significantly differentiate dyes. Disperse dyes require a longer exposure time to fix higher temperatures. In addition, when dyeing with disperse dyes, a neutral to weakly acidic pH maintained, while for the fixation of the reactive dyes one alkaline pH is required. With reactive dyes, the color yields on the goods decrease after prolonged alkali treatment and at higher temperatures as a result of cleavage of the dye-fiber bond strong. Furthermore, it is with the commonly used alkalis, such as alkali carbonate, alkali carbonate or alkali hydroxide, not possible, reactive dyes in the exhaust process at higher temperatures above about 95 ° C, as required for dyeing the polyester fiber component with disperse dyes are to be fixed on the cellulose. Furthermore, the majority of disperse dyes also suffer a chemical change in the event of prolonged exposure to alkali at higher temperatures, which reduces the fastness properties and the hue will be adversely affected.

It has now been found that these disadvantages can be avoided and mixtures of cellulose fibers and fiber materials made of linear polyesters simultaneously with reactive and disperse dyes in the The exhaust process can dye at temperatures above 100 ° C if you use dye baths that are next to the above-mentioned dyes alkalis as well as halogen-containing organic compounds that act as acid donors, preferably at elevated temperature with elimination of hydrogen halide with water react, and optionally contain carriers customary for dyeing the polyester fibers.

Due to the content of the dye liquors according to the present invention of halogen-containing organic Compounds that act as acid donors, the pH value is lowered during the fixing process. This not only makes the application of the reactive dyes in the exhaust process at temperatures above 100 ° C, but also significantly reduces the risk of the fiber-dye bond splitting. Furthermore, the disperse dyes do not suffer any chemical effects in the process according to the invention Change.

The amount of the dyebaths to be added halogen-containing organic compounds, which as The effect of acid donors is primarily dependent on the alkali content of the baths. Provided this alkali content is within the usual limits, can generally with an addition of halogen-containing organic Compounds in amounts of about 0.4 to 40 g / l dye liquor can be expected. The amount to be added of halogen-containing organic compounds is adjusted so that after elimination of hydrogen halide adjusts a pH value of below about pH 8.0.

As halogen-containing organic compounds used in the process of the present invention as Acid donors are mainly aliphatic, cycloaliphatic and heterocyclic compounds with one or more halogen atoms which correspond to the following general formula:

ζ — c -

- R

In the formula, X is chlorine, bromine or iodine or hydroxyl, Y is hydrogen, hydroxyl, an alkyl or a phenyl radical or chlorine, bromine or iodine, Z is hydrogen, alkyl, phenyl or a radical

- C-Y

η 0 or whole numbers from 1 to 5, R _{1 is} hydrogen, - OH, chlorine, bromine or iodine or alkyl or phenyl radicals, which may optionally contain water-solubilizing groups, such as. B. - COOH, - SO ₃ H or - OH, R ₂ can contain hydrogen or alkyl or phenyl radicals, which may optionally contain water-solubilizing groups, such as. B. - COOH, - SO ₃ H or - OH, R hydrogen, -OH, -CHO,

- COOH -SO ₃ H -CONH ₂

- CONH-alkyl - CN CON- (alkyl) ₂

-SO ₂ NH ₂ - SO ₂ NH-alkyl

- SO ₂ N- (alkyl) ₂ ,

CH CH ₂
O

or a residue of the formula

- A -

-C ₁ -Z

where A means - O -, - CO -, - SO -, -SO ₂ - - CONH - -SO ₂ NH-

- CON-alkyl-, --CON-phenyl-, - SO ₂ N-alkyl- or

- _{Has SO 2} N-phenyl, the alkyl and phenyl radicals optionally water-solubilizing groups

pen. R can furthermore mean a radical A which has the group

which takes the place of Z in the general formula, is connected to C ₁ to form a ring system.

In the above general formula, lower alkyl radicals should preferably be used as alkyl radicals about 1 to 6 carbon atoms are understood. The phenyl radicals can also, for. B. by low molecular weight Be substituted by alkyl radicals.

As suitable halogen-containing organic compounds in the aqueous medium, preferably at Elevated temperatures, react with the elimination of hydrogen chloride with the water, are for example called:

Chloroacetic acid,

3-chloropropionic acid,

Phenylchloroacetic acid,

3-chloropropionic acid nitrile,

Ethylene chlorohydrin,

l ^ -Dichloropropanol ^,

l-chloropropanol-2,

3-chloropropylene oxide,

Chloromethanesulfonic acid,

2-chloroethanesulfonic acid,

l-chloropropanol-l-sulfonic acid-S,

Chlorosulfoacetic acid,

3-chloropropanediol-1,2,

l-chlorocaprolactam,

^ -Trichloromethyl-propahol ^,

3-chloropropionaldehyde,

Dichloroacetic acid

and the alkali salts amides or anilides of these compounds.

According to the process of the present invention, the amounts to be added to the liquors are halogen-containing organic compounds that act as acid donors, sized so that after Elimination of the hydrogen halide has a pH of below 8.0, expediently below 7.5, preferably in the range of pH 4 to 6, adjusts. The amount of halogen-containing organic to be used Compounds is therefore dependent on the amount of alkalis used and thus indirect on the amount of reactive dyes used. In general, the amount to be added to the liquor will be halogen-containing organic compounds about 0.1 to 1.0 part by weight, in particular 0.3 to 0.6 part by weight per part by weight of reactive dye, provided that the pH of the liquor in the for dyeing with reactive dyes is the usual range.

The alkalis required to fix the reactive dyes are organic alkaline reactive compounds or, advantageously, inorganic alkalis, such as sodium carbonate, sodium bicarbonate, Trisodium phosphate, sodium hydroxide, the corresponding potassium compounds or mixtures of these alkalis can be considered. The alkalis are used in such amounts that the dye liquor has a pH of above 8.0, preferably in the range from 9 to 12. Generally, alkalis are used in amounts from about 0.1 to 10 g / l added to the dye liquors.

The disperse dyes are those. for the

Dyeing of fiber materials made of linear polyesters well known dyes, e.g. B. those from the Series of azo or anthraquinone dyes in question.

As reactive dyes organic dyes come into consideration, at least one with the cellulose fiber reactive group, a precursor for this or one reactive with the cellulose fiber Contain substituents. Particularly suitable base bodies for the organic dyes are those from Series of anthraquinones azo and phthalocyanine dyes, with the azo and phthalocyanine dyes can be both metal-free and metal-containing. As reactive groups or precursors in the alkaline medium such reactive groups are, for example, the epoxy group, the Ethyleneimide groups, the vinyl group in a vinyl sulfone group or in the acrylic acid radical, also the / S-SuI-fatoäthylsulfonylgruppe called. Possible reactive substituents are substituents which can be easily split off and an electrophilic radical leave behind; Examples include halogen atoms on the following ring systems: quinoxaline, Triazine, pyrimidine, phthalazine and pyridazone.

Carriers which may also be used are those known for dyeing polyester fibers Aids such as B. o-phenylphenol, p-phenylphenol, Benzoic acid alkyl esters, salicylic acid alkyl esters U. a. m., into consideration. Other suitable carriers are e.g. B. listed in the publications "Melliand Textile Reports" (1961), p. 1275 and (1960), p. 198, as well »Textil-Praxis (1957), pp. 383 and 384 and in the ICI company publication ICI-Technical Report» The Dyeing of Terylene ”, Part I of December 11, 1947. The carriers are used in the dyeing of polyester fibers usual amounts for use.

example 1

5 g of mixed yarn made of 70 parts of polyester fibers and 30 parts of _{staple viscose are dyed in a liquor ratio 1:20 for IV 2} hours in a closed dyeing machine at 125 ° C with a dyebath containing, based on the Warenge weight, 1% of the disperse dye of the following formula

H, N O OH

HO O NH ₂

in commercially available form and composition and 5% of the reactive dye of the following formula

O NH ₂

SO, well

SO ₂ -CH ₂ -CH ₂ - OSO ₃ Na

colored at the boiling dyebath, based on the weight of the goods

1.5% of the disperse dye of the following formula

HO CONH

IO N = N

OCH,

in the customary form and condition as well as

1 g / l sodium carbonate,
4 g / l chloroacetamide,
12.5 g / l sodium sulfate

contains.

After dyeing, it is rinsed with hot water and soaped with 1 g / l of an anionic or nonionic detergent - rinsed and dried again. A level, brilliant blue coloration is obtained.

Example 2

5 g of a mixed fabric of 67 parts of polyester fibers and 33 parts of cotton are liquor in the commercially available form and setting, 1.5% of the ratio 1:40 for I ¹ Z ₂ hours in a 15 reactive dye of the following formula

SO, H

OH

CH, - CONH

N = N HO ₃ S

Cl

N-

N SO ₃ H

in the customary form and setting as well

1 g / 1 sodium carbonate,

4 g / l ^ chloroacetamide,
25 g / l carrier based on methylnaphthalene

in commercial form,
12.5 g / l Glauber's salt

contains. ...

After dyeing, it is rinsed, soaped and dried as usual. This makes a brilliant red Preserved coloration on both types of fibers in the fabric.

NH

Claims (1)

Claim: Process for dyeing mixtures of cellulose fibers and fiber materials from linear Polyesters with reactive and disperse dyes in the exhaust process at temperatures above 100 ° C, characterized in that dye baths are used next to the abovementioned dyes, alkalis and halogen-containing organic substances which act as acid donors Compounds and, if appropriate, carriers commonly used for dyeing polyester fibers contain.