DE2424303A1 - PROCESS FOR COLORING POLYAMIDE CARPET MATERIAL BY A KLOTZ COLD-DWELL PROCESS - Google Patents

Description

FARBWERKE HOECHST AKTIENGESELLSCHAFT 2424303

formerly Master Lucius & Erüning

File number: HOE 74 / F U2

Date: May 16, 1974 Dr.OZ / St

Process for dyeing polyamide carpet material according to a Block cold dwell process

For dyeing piece goods in sheet form from natural or synthetic polyamide fibers using the Kotz cold dwell process a number of processes are known.

In some procedures (e.g. in DOS 1 619 378) • the padding liquor for the pad-cold dwell process (preferably on wool) those dyestuff-affine, weakly cationic auxiliaries added to those used with the anionic Colourants form coacervates and thus form a miscible phase. The liquors also contain very high quantities (200 cm / 1) of formic acid, 85%.

In GB-PS 1,175,413 a method is described in which in a cold padding process, the padding liquor for the Dyeing of polyamide fibers extremely high amounts (300 cm / 1) of ethanol and a non-ionic auxiliary (25 cm / 1, with the possibility of coacervate formation) in addition to acid, pickling or 1: 1 metal complex dyes.

In GB-PS 997-513 a method is described in which the padding liquor for polyamide fibers contains acid dyes and extremely high amounts of 85% formic acid (200 cnr / 1) (Risk limit for damage to the polyamide fiber by acid).

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In addition, DAS 2,037,554 describes a process in which metal complex dyes are used for polyamide fiber fleeces in the padding liquors in addition to an auxiliary combination of polyethylene glycol and ethyl diglycol from hot padding liquors be applied.

All of these known cold pad processes for polyamide fibers is the need to use special aids in high concentration or chemicals, also in extremely high concentrations, be it as a fiber swelling agent, as a solubilizer for the dyes or as a kfoacervat former to enrich the dye on the fiber surface together in order to achieve a dye yield, which is somewhat close to the amount of dye used. This certainly creates difficulties due to the high wastewater pollution and possibly due to the impairment of the synthetic polyamide fiber material the high acid concentration.

It has been found that carpet material made of textured polyamide (continuous or staple) fibers in the form of piece goods can be dyed in a simple and economical manner, reproducibly and with practically complete dye yield by the Klotz-Kaltverweil-method, if you do that Textile material with acidic aqueous solutions of acid dyes which contain only a single sulfonic acid group (monosulfonic acids) and which are characterized by K values from 2 to 6, with the K values of the individual components only increasing by a maximum of one K value when dye combinations are used -Unit should differ, with a liquor pick-up of 150 to 300% of the weight of the goods, the material treated in this way docks in.feuchtem condition, to avoid drying out, and 16 to 24 hours with rotation at temperatures of 18 to 30 ⁰ C, preferably at 25 ° C can linger.

When carrying out the method according to the invention, the carpet material is applied to a padder with a liquor dispenser * or another application device ~? ~

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nahine (based on the dry "goods weight) of preferably 200% at temperatures of 18 to 30 ⁰ C, preferably at room temperature 20 ⁰ C, at a pH value of 2.0 to 2.5. (adjusted with formic acid or other acids in an equivalent amount) padded with a wetting agent-containing, weakly thickened liquor which contains such acid dyes, the monosulfonic acids and which are characterized by K values from 2 to 6. The textile material treated in this way is then docked, packed in a plastic film, around a to avoid drying out, and 16 to 24 hours while rotating at temperatures of 18 to 30 ⁰ C, preferably at 25 ° C left to dwell.

the coloring
A residence time of more than 24 hours is harmless, but does not contribute to increasing the dye yield, since the fixing process is completed after a maximum of 24 hours. The higher the dwell temperature within the specified range, the shorter the dwell time that can be selected.

After lingering, it is re-treated in the usual way by rinsing and washing in the broad state.

uncolored

Follow-up by the pull-out process with the same / polyamide material from the liquor of the first rinsing bath of the aftertreatment operation show that the dye used is practical has been fully fixed.

The material of the trailing edge is hardly tinted.

As for the feasibility of the dyeings according to the invention, so it was not foreseeable that if the conditions of the cold pad pad process were adhered to, they would not be used a thermal process and without the use of special aids or chemicals in high concentrations level and reproducible dyeings also in combinations of three and complete dye fixation even in deep colors Tones, perfect dyeing even with denser material and fastness properties that are the same as those of dyeings of the same Dyes on this material using the exhaust process

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speak, can be reached.

It must also be considered unexpected in relation to the present invention be considered that the textile properties of the carpet pile, the elasticity and the fullness in no way are affected, e.g. when the goods are docked, no "pole shifting" occurs. Because the dye fixation comes in handy at room temperature is a thermal load * • and therefore their deformation is excluded. * of the fibers

It was with regard to the conditions to be observed for the claimed dyeing process also surprisingly that the dye characteristics developed for the exhaust process (K-Wer1e) can also be used as a criterion for the selection of dyes without special adaptation for a block method could.

When using differential dyeing yarns as part of the In the new process, the "non-dyeing-type" is properly reserved at a constant dwell temperature.

In contrast to the anionic dyes defined and characterized here, they are suitable for use according to the processes described not such acid dyes that either '2 -bzw. Contain 3 sulfonic acid groups or their K values are outside the range of 2 to 6. Metal complex dyes are also expressly excluded from this process, which are not suitable even if only they

1 sulfonic acid group should contain. The results of such The yield of dyeings does not correspond to the amount of dye used (see example 3b). With strongly differing K values, both the equality and the equality of ends and the yield are called into question (see example 3a).

The K value . (Combination key figure)

The term K-value has become used in practice for labeling the combinability of ionic (acidic or basic) dyes introduced. The K value is a dye-specific

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fish characteristic, which is about the combinability of a Dye is a practical statement for the exhaust process due to its relative drawing speed or its affinity power. The K value is determined experimentally using a coloristic method.

The material to be examined is tested under standard conditions (textile material, pH, liquor ratio, dyeing temperature) Dye in admixture with another from a series of conventionally selected dyes with known ones Drawing speeds in a fixed amount. In this series of comparison dyes, the dye with the highest receives Drawing speed the K value 1, which is the lowest that of 8. According to the results of this comparison the tested dye is then added to the comparison dye with the corresponding drawing speed and its K value - " orderly. The dye can then be combined with those other brands that are the same or at most about have a K-value unit differing from K-value, it being expected that those produced with these combinations Colorings are perfectly irrelevant and reproducible.

excluding In the present case, the K values that were originally / for the exhaust process were developed for a pad-dwell process made usable as a guide value for the selection and suitability of the dyes. So the K value doesn't just say whether the selected dyes are suitable for combinations with one another, but also whether they are at all suitable for the process because it has been found that only dyes in the K value range of 2 to 6 can be used.

Literature on the combination index ( K value, Compatibility Value)

Otten, BAYER Farbenrevue, January 1972, 21, p. 32 to 48, (Acid dyes)

SQ3847 / 1ÖÖ7

SDC, JSDC, June 1972, pp. 220 to 222, (proposal for a standard specification for basic dyes)

example 1

Tufted carpet piece goods with a pile of continuous textured polyamide 6,6 fibers (regular-dyeing-type) and with synthetic back is based on a foulard at 25 ⁰ C and a liquor pickup of 200% (on the weight of dry Total goods) padded with an aqueous liquor that contains per liter:

10 g of the dye Acid Orange 3, C.I.Nr. 10 385 (Monosulfonic acid with a K value of 5),

3.5 g of the dye Acid Red 42, C.I.No. 17 070

(Monosulfonic acid j K value = 5-6),

3.2 g of Acid Blue 41 dye, C.I.No. 62 130 (Monosulfonic acid K value = 6),

100 g of a 3% solution of a thickener Basis of a fully etherified kernel flour,

. 5 g of an anionic wetting agent based on di-isobutylnaphtalinsulfonsaurem sodium and

10 g formic acid 85% (to a pH of 2.4).

The padded wet carpet material is docked, the dock by wrapping it in a polyethylene film to prevent it When it dries, it is covered airtight and left to rest for 24 hours at 25 ° C while rotating slowly. The aftercare The fabric dyed in this way is done in the wide state in the usual way by thorough warm and cold rinsing with water. A follow-up with the liquor from the first rinsing bath and the same, undyed polyamide material using the exhaust process shows that the dyes have been fixed practically completely on the polyamide fiber portion of the carpet are; the test material is only very weakly tinted.

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A reproducible level brown shade is obtained on the carpet material in full dye yield and thus in one Depth of color as with the same amount of dye through one Exhaust process can be achieved on this material.

The fastness properties correspond to the carpet dyeing obtained in this way those of dyeings after the exhaust process.

The carpet surface, the Fior, is not subjected to any thermal stress and therefore remains completely unaffected and suffers neither deformation nor damage to the texturing.

If, on the other hand, a combination of metal complex dyes is used in the amounts to carry out the process would result in a matching color on the same material after the exhaust process, "you don't just get one significantly lower dye yield, but also one Shift in hue if the cold dwell method described here is used.

The same applies to combinations of such acid dyes that are disulfonic _{acids or whose K r} ¥ erte differ by more than one K value unit.

Example 2a

To produce the coloration, the procedure is as in Example 1, however, using

2 g of the dye Acid Yellow 65, C.I.Nr. ' 14 170, (Monosulfonic acid, K value = 2) and

10 g of the acid dye of the formula

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O NH,
I] 'I ^£

SCUNa

-O

SO,

-CH

(Monosulfonic acid, K value = 2)

wherein the block temperature 20 ⁰ C, the dwell temperature 28 ⁰ C, and the residence time is 20 hours.

A level, full, greenish dark blue shade results on the polyamide fiber portion of the carpet material.

The dyes chosen are both for combinability with one another and for this cold padding process suitable. The amounts of dye used are in full fixed, the follow-up from the liquor of the first rinsing bath results in hardly any tinting on undyed polyamide fibers.

Example 2.b

The dyeing is carried out as in Example 1, however under the use of

4 g of the dye Acid Red 42, C.I.No. 17 070, Monosulfonic acid K value = 5-6,

the padding and holding temperature being 18 ° C and the holding time being 16 hours.

The result is a red coloration that corresponds to the amount of dye used is equivalent to. The dye is fully fixed, the trailing edge is only slightly tinted.

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Example 3a

The dyeing operation is carried out as in Example 1, but using

10 g of the acid dye of the formula

nh-co-ch-co-ch,

ι Λ

N = N- / "X-SO ₂ -NH-CH ₂ -CH ₂ -S-SO ₃ Na

(Monosulfonic acid, K value = 6-7) and 2 g of the dye Acid Blue 40, C.I.Nr. 62 125, (Monosulfonic acid, K value = 4)

This combination of dyes results in a lively yellow-green shade, which, however, is not irrelevant, corresponds to the dye yield does not meet expectations from the amount of dye used. The redraw on the undyed polyamide material from the first rinsing bath is heavily colored, more yellow in tone than that padded carpet material.

The selected dyes are therefore not suitable for their combinability (lack of levelness) and not for this Cold batch process (insufficient dye yield) because the K values differ too much and are also sometimes outside the optimal range.

Example 3b

Is used for dyeing while maintaining the conditions of Example 1

20 g of the chromium 2: 1 complex dye of the formula

• CH ₅ f- \

^Λ NO ₀ S- / Vn = NCC-CH,
fin '2 \ / jj} | 3

• OH ^H0 "

- 10 -

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this gives the carpet a level red coloration, the depth of which remains after the exhaust process; the follow-up from the first rinsing bath on undyed polyamide material is heavily stained.

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Claims (1)

P_ ate η tan s_ P _n r U _- c __h Process for dyeing carpet material made of textured polyamide (continuous or staple) fibers in web form by a cold padding process, characterized in that the textile material with acidic aqueous solutions of such acid dyes - which contain only a single sulfonic acid group (Monosulfonic acids) and which are characterized by K values 2 to 6, whereby when using dye combinations the K values of the components should only differ by a maximum of one K value unit, with a liquor uptake of 150 to 300 % ( on the weight of the dry goods) on a padder, the goods treated in this way docks in a moist state, covers to avoid the dry ice and 16 to. 24 hours with rotation at temperatures of 18 to 30 ⁰ C, preferably at 25 ⁰ C, can remain. 5098A7 / 1007