DE3228069C2 - - Google Patents

Description

The invention relates to color-stable disperse dye preparations. Yellow to tan, especially for disperse dyes Shades make it difficult to dye preparations highly concentrated to produce, which result in a stable dispersion distributed in the dyebath, which is also retained under the dyeing conditions, so that no dye filtering when dyeing z. B. packages, through the dye liquor is pumped during dyeing take place. For the production such highly concentrated disperse dye preparations the selection of the dyes in the mixture is essential.

Color-stable disperse dye preparations have now been found from

• a) 20 to 55% of a dye of formula I.
• b) 5 to 40% of one or more dyes of the formula II where a + b = 40 to 70%, and
• c) 30 to 60% of one or more dispersants and optionally other common additives

exist, in formulas I and II
R₁, R₂ and R₃ independently of one another chlorine, bromine or iodine and
R₄ is hydrogen or a group of the formula -COCH₃, -COC₂H₅, -COCH₂CH (CH₃) ₂ or -CO-C₆H₅
mean, and the percentages by weight are to be understood.

Such dyes of the formulas I and II (always understood in pure form) are preferably used, in which
R₁ and R₂ chlorine,
R₃ chlorine or bromine, especially chlorine and
R₄ is hydrogen, acetyl or propionyl, especially hydrogen or acetyl
mean, the mixtures containing only one or two dyes of the formula II. The amounts of dyes and additives present in the preparations are preferred

• a) 30 to 55%, in particular 35 to 55%, of a dye of the formula I,
• b) 5 to 30%, in particular 5 to 25%, of one or more dyes of the formula II, the sum a + b = 50 to 65%, in particular 55 up to 60% and
• c) 50 to 35% of one or more dispersants and optionally other common additives.

The individual dyes (of the formulas I and II) are known, or leave easy to manufacture analogous to known methods.

The well-known preparations, e.g. B. To understand lignin sulfonates or synthetic products. Other usual Additives are e.g. B. slightly water-soluble salts, which also have a buffering effect can exercise, or even small amounts of other dyes, e.g. B. as shading elements (0.5 to 2%), also descaler and agent the dusting of the dry preparations and the foaming of the aqueous ones  Prevent dispersions.

Dyes from preparations of the specified composition pull out of aqueous suspension excellent on textile material fully synthetic or semi-synthetic, hydrophobic, high molecular weight organic substances. They are particularly suitable for dyeing, padding or printing on textile material from linear, aromatic polyesters, as well as from cellulose-2½-acetate, cellulose triacetate and synthetic Polyamides.

You dye, block or print according to known, z. B. in the French Patent No. 14 45 371 described method.

In the following examples, parts are parts by weight and percentages Weight percent; the temperatures are given in degrees Celsius.

Example 1

In a beaker with 1500 parts by volume, 80 parts at 20-30 ° of the dye of the formula

40 parts of the dye of the formula

and 80 parts of a mixture of commercially available lignin sulfonates in 100 up to 200 parts of water with 600 parts by volume of silica quartz beads and one Two-plate stirrer for approx. 6 hours at 2000-2500 revolutions per  Minute ground. Then dilute the grinding batch with approx. 200 parts Water and filter it through a glass suction filter G 1 into a suction bottle. The dye (and dispersant) adhering to the silica quartz beads is rinsed quantitatively into the feeding bottle with a little water. The so received The dispersion is adjusted to pH 8 with 10% phosphoric acid and then atomized on a laboratory atomizing dryer (hot air 130 °, internal temperature 55-60 °). The dye preparation thus obtained has excellent dispersion stability.

10.0 parts of the ultradisperse coloring preparation are mixed with 1000 parts Water dispersed, and the circulating liquor (13 000 parts, containing 30 parts of ammonium sulfate and 0.3 parts of formic acid as a buffer mixture) added at 60 °. The pre-cleaned and pressed cheese (1000 parts of PE yarn on a plastic sleeve) is then introduced, the dyeing autoclave sealed and heated from 60 ° to 130 ° in 35 minutes. To The mixture is cooled to 80 ° for 15 minutes at 130 ° and the liquor drawn off is discharged and washed the colored bobbin thoroughly with cold water. Then it is swung and dried in a drying cabinet.

You get a deep (approx. 2/1 standard depth), perfectly level, pure Color yellow-brown shade, free of filtering, with excellent Wet and rub fastness. The fleet is practically colorless Dyeing equipment shows no deposits and can be used immediately for the next Coloring can be used.

In the following table are more, according to the information in the above For example, dye preparations that can be prepared are given. On polyester fiber material dyed with all these preparations dyeings are obtained tan nuances.  

table

Claims (6)

1. Color-stable disperse dye preparations consisting of

• a) 20 to 55% of a dye of formula I.
• b) 5 to 40% of one or more dyes of the formula II where a + b = 40 to 70%, and
• c) 30 to 60% of one or more dispersants and optionally other customary additives,

where in formulas I and II
R₁, R₂ and R₃ independently of one another chlorine, bromine or iodine and
R₄ is hydrogen or a group of the formula -COCH₃, -COC₂H₅, -COCH₂CH (CH₃) ₂ or -CO-C₆H₅
mean, and the percentages by weight are to be understood. 2. Color-stable disperse dye preparations according to claim 1, wherein in the dyes of the formulas I and II
R₁ and R₂ chlorine,
R₃ chlorine or bromine and
R₄ is hydrogen, acetyl or propionyl
mean. 3. Color-stable disperse dye preparations according to claim 1 or 2, wherein in the dyes of the formulas I and II
R₁, R₂ and R₃ chlorine and
R₄ is hydrogen or acetyl
mean and only one or two dyes of the formula II is (are) present in the mixture. 4. Color-stable disperse dye preparations according to one of the preceding claims, containing

• a) 30 to 55% of a dye of the formula I,
• b) 5 to 30%, preferably 5 to 25% of one or more dyes of the formula II, the sum a + b = 50 to 65%, and
• c) 50 to 35% of one or more dispersants and optionally other customary additives.

5. Use of the disperse dye preparations according to the claims 1 to 4, for dyeing or printing fibers or threads or materials made from fully or semi-synthetic materials, hydrophobic, high-molecular organic substances.