DE1909514A1 - Process for dyeing polyester fibers with disperse dyes - Google Patents

Description

FARBWERKE HOECHST AG., Formerly Geister L'oc'us & Brim ing File number: - Fw 6öo3

Feb. 12, 1969 - Dr.Cz/Kö

Process for dyeing polyester fibers with disperse dyes

It is known that linear polyester fibers can be mixed with disperse dyes can color according to the Thermosol process. Box this An aqueous liquor is applied to the textile material. . ■ ig Disperse dye applied, the goods then dried and then, for 3o to 12o seconds, a heat treatment subjected to at about 13o ° to 23o ° C. In the course of the heat treatment The polyester fiber is then fixed and thereby receives its optimal textile technological properties. Takes place at the same time the fixation of the disperse dyes in this polyester fiber.

It has now been found that when linear polyester fibers are dyed with disperse dyes by the thermosol process, the color yield of the disperse dyes is significantly increased by adding polyglycols to the padding liquor. At the same time, the reducibility of the thermosol process can be increased significantly, since the measure explained above makes the color yield less temperature-dependent. Another Vorteii this method e is to be regarded _s, that the dyeing of Misclu. Weaving in the presence of polyglycols less disperse dye on the companion fiber remains as without the addition of the adjuvant or the concomitant use of urea has also been found that the levelness of Dyes on goods qualities that are difficult to color, such as so-called "cracked fabrics" or "loosely laid fabrics", are remarkably improved through the use of polyglycols according to the present process, as well as differences in color depth across the width of the fabric.

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which conditionally. are due to unequal .H it zevei 'division' ir. Thernosola-i ^ Regat and can also by adding urea kauri verb in.dort vordeii practically no longer occur. In view of the current conception of the art, that Any Y. i tr,; irkun; -; of polyglcol at elevated temperature a noticeable change in the textiJLtcchnologlschen properties of polyester fibers, it must be regarded as surprising that there is such a negative influence on the fiber quality by the Polyglycols are not caused. Finally, when polyglycols are used instead of urea, the nc; ative side effects of the addition of urea, namely odor nuisance for the operating personnel during fixation and sublimation of urea and its deposition on the cooler parts of the thermosol system, which sometimes Can cause machine damage, is not given.

When carrying out the process according to the invention, the textile material made of linear polyester fibers is padded with a 2o to 5o C liquor, preferably 3o C, which contains the dispersed disperse dye, polyglycol and optionally also thickener, at pH 5 to 7, preferably at pH Q ₁ . The moisture absorption of the textile material is from 5o to loo% .. Subsequently, v / ith the wet Yi'are means of hot air or on belo-zth Meiallzylindern at 8o ° to 15o ° C, preferably dried to loo ° '13o C. ₇

The disperse dyes are fixed in the polyester fiber by heat treatment for 30 to 120 seconds, preferably 4o to 9o secimden, with heated air, superheated steam, a mixture of air and superheated in steam or on heated cylinders at 185 to 23o C, preferably 19o to -2'Io C. The dye is then rinsed, soaped and in the usual manner completed. - ■ _.-- "" ■

According to various sources, the disperse dyes used are those for dyeing of fiber materials made of linear polyesters h.i'nlän; cJ i bok? ai-nten Dyes, for example those from the series of the azo or arthraquinone dyes in question.

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As Polyglykoie reach -vorIielenden according to the "invention boyondcrs the Polyiit Uylenglyko] e, ie, polymers that avis At hy 1enoxyd units are constructed nit an average molecular weight of about 2oo his 15oo or dic Misc'lum'sen. ^C -CR Products with a lower degree of oxethylation, but preferably those kit with average: borrowed molecules from 400 to 100%. However, polyglycols whose chain links are derived, for example, from propylene or butylene oxide, can also be used and mixtures of the various polyalkylene oxides are used, with these products or mixtures also having an average molecular weight of about 2oo to 15oo on the Rünsttpslen. Of the above polyglycols the padding liquor per liter of generally 5 to v.'erden iiogj preferably Io to 2o g, was added.

The disperse dyes show ihi'o in a weakly acidic medium best fixing properties in the Therrioso] process. the end For this reason, the pH value of the padding liquor is included if necessary organic acids such as acetic acid or formic acid are preferred Acetic acid, adjusted to a pII value of 6. That However, the method is not limited to a specific pH- Value of the Klotzfiotte and also applies to weakly alkaline Clogs.

The genäß the claimed methods to be dyed textile material, which _F from lihcitv.cn polyesters, preferably Polyätlylenglykolterephthalat or!.! Ischungen of these fibers with other fibers, such as with nativcn or regenerated cellulose fibers, wool or Polyacrylnttrilfasern exists, can be in a variety of Zubereitungsforanen, for example as a card sliver, yarn, woven or knitted fabric.

The examples listed below are intended to explain the implementation of the claimed process in more detail, but without it in to restrict any respect to the conditions shown there. ·

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- 4 -. ■ ■■ "■ :;

example 1

A fabric made of polyethylene terephthalate fibers is placed on the padder with a "squeeze effect of So weight percent with a 3o G. warm liquor padded in the liter "Yfasser.; 6o g of the DJ spersions-farbs.tof f it of the formula

N -CH "-σΐ", -ΟΙ _ο -OCH ο

Cl Ci Ci ό

in the customary form and condition, as well as.

Io g of a polyethylene glycol from the mol wt. approx. 6oo and is adjusted to pH 6 with acetic acid.

The padded tissue is then heated to 130 ° C. for 40 seconds dried and then subjected to hot air treatment at 21o C for 60 seconds.

After this heat treatment, the fabric is rinsed cold and hot and 15 minutes at 95 ° C with .einer liquor soaped, the liter 2 Contains g of a nonionic surfactant auxiliary. Instead of the soap treatment, lain the fabric with a Solution in liters

4 ecm caustic soda of 38 Be,

4g sodium hydrosulfite and

2 g of a non-ionic surface-active auxiliary
contains, during 2o minutes at 35 ° C reductively cleaned.

A product is obtained that is deeply orange in color.

If the material is used without the addition of polyethylene glycol from the Hol.-wt. about 600 padded, dried and thermosolated under the same conditions, so you get a much lighter color of the "poly" ester fiber than in the method according to the invention. *

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BAD ORIGfNAC

Example 2

A fabric made of polyethylene terep-.hthalate fibers is placed on the padder with a squeeze effect of. 5o weight percent with a 4o C. warm liquor padded in the liter of water 3o g of the disperse dye of the formula

in the customary form and condition, as well as

Io g of a polyethylene glycol with a molar weight of about 8oo and is adjusted to pH 6 with acetic acid.

The padded fabric is then dried at 130 ° C. for 40 seconds and then a hot air treatment at 2oo C for 60 seconds subjected. The aftertreatment is carried out as in Example 1. It is received a product that is colored deep blue; '... · -.

If the material is used without the addition of polyethylene glycol by the molar weight, about 8oo padded, dried and under the same conditions thermosolated, the result is a much lighter color of the Polyethylene terephthalate fiber than in the method of the present invention.

A comparably good result is also achieved with. Polyethylene glycol from the mol. about 600 achieved with the same amount used.

example

A blended fabric made of polyethylene terephthalate fibers and cotton in a mixing ratio of 67:33 is used on the padder with one Squeezing effect of G5. Weight percent "irides a 3o C warm Fleet padded in liters of water

OO983B / 2040 BAD QRtGJNAl. ^^

60 g of the dispersion dye of the formula

in customary form and condition, so: ie

Io g of a Polvät.hy lenglykols from Mol.-Ge'.v.ca. 4oo and is adjusted to a pH of G with acetic acid.

The padded fabric is then dried at 13o C for 60 seconds and then a hot air treatment at 210 ° C. for 60 seconds subjected. The aftertreatment is carried out analogously to Example 1. A Y / are obtained which is colored deep red.

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Claims (1)

Pa1 correspond Process for dyeing linear polyester fibers with disperse dyes according to the Therriosol method ", characterized in that that the KJolzflot ten polyglycols. added v.'erd.en. A method according to claim 1, characterized in that as PoIyäthj'lenglykole with an average of LoIekulargewicht 2oo to 15oo, preferably from 4oo his 3oo used \ yerden. 009838 / 20Λ0 BAD ORiGINAU