DE2449783C2 - PROCESS FOR SIMULTANEOUSLY SIZING AND DYING WOVEN CHAINS MADE OF CELLULOSE FIBERS - Google Patents

Description

«5

For the production of cotton fabrics with dyed warp and undyed weft yarn, the so- 3 <> named Denim-ArÜkel are for the plain color process with coupling and diazo components for the formation of azo dyes / on the fiber two different methods are known

• ^At o ^d l ^m u ⁿ ? ^{Verfa, h} r ^{s we, rden} t ^{he warps with} a sizing liquor padded, in addition to the sizing agents still aUcahsch gdöste coupling components (CI azoic coupling components) included After drying the chains over drying cylinders are those with mostly undyed (raw white) 4 <> weft woven, the fabric padded on a padder with an acidic solution of a diazonium salt (CI Azoic Diaze Component), the dye being formed by coupling on the fiber.

In the second process, the sizing liquor contains both the coupling component dissolved in an alkaline solution as well as an alkali-resistant ^ in the alkaline Medium non-coupling stabilized diazo compound, like triazenes or antidiazotates. After drying and the chains are woven together, the dye is formed by acidic or neutral steaming. In this case the acidic developing bath is no longer necessary; the second method is therefore easier compared to the first, but because of the stabilized diazo compounds used are also more expensive.

It has now been found that one can use the size-color method can be carried out in a simple, reliable and economical process, if the warp threads are passed through a hot liquor containing an alkaline solution of the coupling component (C.I. Azoic Coupling Component), alkali, an anion-active protective colloid, sodium nitrite and a (non-diazotized) aromatic amine (C. I. Azoic Diazo Component, finely dispersed by means of an anionic dispersant), but does not contain sizing agents, then dries and then on the padder of a sizing machine with a hot sizing liquor, which, in addition to the sizing agents, also contains a weak organic car · bonsäure and optionally its alkali salt, as well as an anion-active wetting agent, the development the azo dyes on the cellulose fiber by diazotizing the amine and coupling the so Diazonium compound formed takes place with the coupling component. Then it is dried.

The subject of the invention is therefore a process for the production of cellulose fiber fabrics from dyed Warp and uncoloured or differently dyed weft yarns with coupling and diazo components, such as si «for production insoluble azo dyes are used on the fiber, characterized in that the First pad the warp threads with a hot liquor containing an alkaline-dissolved coupling component, alkali, an anion-active protective colloid, sodium nitrite and a finely dispersed one by means of an anion-active dispersant contains aromatic amine, then dries and then with a hot sizing liquor blocks, which contains a weak organic carboxylic acid and an anionic wetting agent and then dries.

The preferred coupling components (Azoic Coupling Components) in this method are low- or medium-noun aryl amides of acetoacetic acid, 2-hydroxynaphthalene-3-carboxylic acid or heterocyclic o-hydroxycarboxylic acid is used. Examples include 2-hydroxynaphthalene-3-carboxylic acid phenylamide, its substituted in the arylamide radical by alkyl, alkoxy or chlorine radicals Derivatives like

2-hydroxynaphthalene-3-carboxylic acid (2'-methylphenyl-l ') amide,

2-hydroxynaphthalene-3-carboxylic acid (2'-methoxy-phenyl-1 ') amide and
2-Hydroxynaphthalene-3-carboxylic acid- (3'-chloro-6'-methoxyphenyl-1> amide, further
2-hydroxycarbazole-3-carboxylic acid (4'-chlorophenyl-1 ') amide and
S-chloro ^ -aceto-acetyl-amino-l ^ diethoxybenzene and

4,4'-bis (acetoacetylamino) -3,3'-dimethyldiphenyl.

As amines (C. I. Azoic Diazo Components) ζ. Β. be used:

4-NitΓO-2-amino-l-methyl-benzene _>

5-nitro-2-amino-1-methoxy-benzene,

2-amino-l-methoxy-benzene-4-sulfonic acid

n-butylamide,

l-amino-2,5-dimethoxy-benzo-4-nitrile,

i-Amino-4-benzoylamino-2,5-diethoxy-benzene,

4,4'-diamino-3,3'-dimethoxy-diphenyl.

The compounds mentioned are only intended to show the breadth of application of the method.

The dispersions of suitable aromatic amines (base dispersions) required for the new process can be prepared in different ways:

For example, the dispersion is obtained by grinding the amine in an aqueous slurry, in Presence of a dispersant to avoid the formation of agglomerations. This operation can in a roller or vibrating mill filled with balls take place; Agitator ball mills, those with glass beads or with natural ones, are particularly suitable Sand are filled. Fine distribution by means of a so-called dissolver also often leads to useful ones Results.

Another possibility is to use a solid alkali and the alkaline, dissolved coupling component

To enter the preparation in water, which by nente and at the same time a fine dispersion of an aromatic

Spray drying of a solid dispersant demacic amine (C. I. Azoic Diazo Component)

containing base dispersion or which contains sodium nitrite after drying

The development is carried out by grinding a mixture of a solid dispersion chain over drying cylinders

gavage and the amine, e.g. B. in a pin mill, to the insoluble azo dye on the cellulose fiber

was produced. by padding with a sizing liquor with a

However, the dispersion can also only be made in the padding-weak organic acid, which may optionally be mixed with

fleet are produced, z. B. has been buffered by adding one of its own alkali salt, a

Solution of the amine and a dispersing agent in an anionic wetting agent and the sizing agents

a water-soluble organic solvent in holds. This development takes place before weaving

the aqueous padding liquor. with raw white weft yarn. The acid passage brings

The dispersants used here do not have to detach any components of the colored

with the alkaline solution of the coupling component chains with it. Post treatment is done, too

and those used to stabilize them, as for piece dyeing shops with such development

surface-active agents and demented dyes is common, after weaving on one

Speaking anion-active character, which in a wide washing machine by boiling alkaline soap

non-ionic dispersants for single bath start-up and rinse.

Turn with the alkaline solutions of the Kupp- The use of the (non-diazotized) dispersing

treatment components is known not to be the case. Two aromatic amines has the advantage that this

Examples include: alkylarylsulfonates, aryl-dispersed or dispersible bases in substance

sulfonates, sulfonated cresol - formaldehyde - resins, have a practically unlimited shelf life because they are

Formaldehyde - naphthalenesulfonic acid - condensate to diazonium compounds chemically under

tion products, lignosulfonates and oxylignins. normal, including tropical, storage conditions

Do not decompose the maximum grain size of the dispersed amine s5. The stability of your aqueous dispersion should be about equal to or less than 0.03 mm, the ion is also excellent,
so-called "mean grain size" according to R am 1 er - It was surprising that the dispersions of the R ο si η were approximately equal to or smaller than 0.003 mm. dispersed amines also in hot alkaline block-

Such a dispersion can be prepared as follows, it is fast and also drying: 30 operations before developing without any disadvantage

173 parts by weight of 4,4'-diamino-3,3'-dimethoxy-di- withstand.

phenyl as water-moist, 78% strength goods, are por- In the two previous Schlichtionsweise together with 45 parts by weight of a dyeing process, different usage oxylignins are entered in 82 parts by volume of water. B. wash fastness achieved.
is stirred well. The resulting mixture is spread over 35 In the sizing - priming - process (Kuppeiner continuous component coated with siliquarzite pearls in the liquor liquor) the borrowed agitator ball mill is carried out up to the development with the diazo component with the necessary fine distribution (zoneless discharge of a woven product After an aftertreatment in wide filter paper with a medium pore size, the state is ground by rinsing and boiling, alkaline silk thinning 1:40). 40 detergents are used to achieve good washfastness

For economic reasons, the molar ratio is used.

Amine to coupling component about 1.2 to 1.5: 1 in the process in which from the size liquor

chosen. The amount of alkali nitrite is around 200 in addition to the coupling component also alkali

up to 300% of theory, based on the amine used. stable, stabilized diazo compounds on the

The sizing agents that are usually used can be applied, and are also obtained from internally used be used, provided they are with anionic and repeated boiling alkaline afteractive Dispersants and alkaline solutions Treatment with soaps only moderate friction and the coupling components are compatible. In addition to washfastness. Even with every new household member The starch used is mainly carboxy washing, there is further bleeding and color depth methyl cellulose called. 50 loss. A noticeable improvement in washing

The acid can be e.g. B. can be used: Ant authenticity is only guaranteed by an additional post-treatment

acid, acetic acid, lactic acid, tartaric acid, amber is achieved with copper sulfate / acetic acid, whereby in

acid. Even the use of an acidic due to hydrolysis, in some cases a color change (even more cloudy)

reactive inorganic salt, such as. B. aluminum must be accepted. The thus achieved

minium sulfate, is possible. 55 bare wash fastness level then corresponds approximately to that

About the powerful sulfur vat dyes that are often desired in denim articles.

To obtain a proper handle, one can immediately after In the method of the present invention

this acid passage the drying - possibly after the washfastness of the dyeings through the post-

an air passage - controllable in a suitable drying device treatment, which is evidently due to the special

processing, as in a cylinder drying machine, a 60 particular type of pigment formation is made possible.

Tenter frame dryer or a hot flue. Washed out only with hot water after weaving,

In general, however, in order to remove the one that remains on the warp thread is given

Sizing and azo pigments unfixed from dyeing auxiliaries and residues cause the un-

after dye formation wash as usual and only dyed weft yarn. This effect is in some mo-

then dry it. 65 Danish articles (jeans) even welcome. Takes place every

The principle of the method according to the invention, however, insists on a thorough after-treatment on the Breit in that the cotton chains are washed with hot rinsing and boiling The liquor that does not contain any sizing agents, but the alkaline soaps with effective detergents

in several boxes, so the wash fastness is very good and the weft yarn is not tinted.

In the method according to the invention, it is also possible to use two or more of the dispersed Amines, which, with the coupling component, result in different color tones during coupling Mix with each other to combine. This also applies if these bases have different coupling properties to have. In this way, for. B. a nuance take place.

example 1

A cotton chain is on a padder at 90 ° C and a liquor pick-up of 70% with a Fleet padded, which contains per liter:

Bathroom template:

800 cm ^{3 of} water at 95 ° C,
5 cm ³ sodium hydroxide solution 32.5%,
5 g of the condensation product from naphtha

lins, dlfonat with formaldehyde,
10 g of the Azoic Coupling Component 20, CI

No. 37 530, solved with
10 cm ³ ethanol,

5 cm ³ sodium hydroxide solution 32.5%,
20 cm ^{3 of} water at 40 ° C,
10 g sodium nitrite dissolved in
30 cm ^{3 of} hot water,

14 g of a fine dispersion of the Azoic Diazo Component 13, CI 37 130 (containing 40% of the base and 15% of an anionic dispersant based on lignosulfonic acid, prepared according to the aforementioned information), diluted with
40 cm ^{3 of} cold water.

Parent size

60 g potato starch,

15 g carboxymethyl cellulose (digested

or solved) in
800 cm ³ water (boil),
35 cm ^{3 of} 60% acetic acid and
10 g sodium acetate crystall. solved in
40 cm ³ hot water,

2 g of an anionic wetting agent based on di-isobutyl-naphthalene-suifonsaurem

Sodium.

This solution is stirred into the Stammschlichtc, with boiling water to 1000 cm ³ final volume

is added, and then the goods are made with this size padded and dried on drying cylinders. After weaving with raw white weft yarn, this will be Material aftertreated by warm rinsing and boiling alkaline soap. A denim fabric results with red-colored chain.

Wet-on-wet development also has roughly the same effect (without drying the padded chain). Because the wet chain is less Can take up the fleet, the sizing liquor must correspond to the difference in the fleet uptake from Primer pad for the plain development pad be more focused. The liter of the sizing liquor contains:

30th

130 g potato starch,
33 g carboxymethyl cellulose,
76 cm ³ acetic acid 60% and
22 g sodium acetate crystall.

The other conditions remain the same, but the addition of a wetting agent can be omitted. The speed of the goods is appropriately increased somewhat.

The individual solutions are shown one after the other

The procedure is as in Example 1, but with the addition of boiling water to a ^{volume of 1000 cm 3} , and the goods are then padded with this liquor. It is then dried on drying cylinders (the first heated to 90 ° C).

The development then takes place from the sizing liquor, with an edition of 130% and at 90 ° C, the per liter contains:

£ ^r ^ ²⁰¹⁰ . ^Cou P ^lm 8 Component 2, CI _in ., 37 505, and by
¹⁰ S / ^{1 the fine} ^ ^ls P ^sr _T ^sl ° " ^v ° ⁿ ^ ^{010 Diazo}

^{component 48) C> L 37 235} '
A denim fabric with a blue warp is obtained.

Claims (2)

Patent claims: 1. Process for the production of cellulose fiber fabrics from dyed warp and un- or differently dyed weft yarns with coupling and diazo components, how they are used to produce insoluble azo dyes on the fiber, characterized in that one first pad the warp threads with a hot liquor, " the one coupling component dissolved in an alkaline solution, alkali, an anionic protective colloid, sodium nitrite and contains an aromatic amine finely dispersed by means of an anionic dispersant, after that it dries and then padded with a hot sizing liquor, which is a weak organic one Contains carboxylic acid and an anionic wetting agent and then dries. 2. The method according to claim 1, characterized in that the * ° weak organic acid used for development still contains its alkali salt,