Yellow reactive dye composition

Details Yellow reactive dye composition Yellow reactive dye composition

1999-11-12

2001-03-20

Einsmann, Margaret (Department: 1751)

Bleaching and dyeing; fluid treatment and chemical modification

Reactive dye composition, process, or product

Alkylene sulfato, halotriazine, halodiazine,...

C008S641000

Reexamination Certificate

active

06203581

ABSTRACT:

FIELD OF THE INVENTION
The present invention relates to a yellow dye composition, in particular relates to a yellow reactive dye composition suitable for using in dyeing or printing cellulose fiber or fiber materials containing cellulose.
BACKGROUND OF THE INVENTION
Reactive dyes for dyeing or printing cellulose fiber or fiber materials containing cellulose are required to have excellent dyeing properties such as leveling, reproducibility, solubility, and fastness. Particularly, good performance in build-up, reproducibility, vivid hue performance, levelness, and wash off property are very important for yellow reactive dyes. In addition, outstanding color fastness to light, to perspiration and to chlorinated water are also primary requirements for the dyed or printed products.
However, there are many drawbacks to the yellow reactive dyes on market. For example, insufficient build-up for heavy shade is one of the major shortcomings for commercial yellow reactive dyes. Furthermore, dyes with good build-up for heavy shade but often in reddish shade is another drawback found among these yellow reactive dyes. Moreover, drawbacks such as long batch time for cold-pad-batch application incapability of being background color for discharge printing are also the general disadvantages of the yellow reactive dyes on the market.
SUMMARY OF THE INVENTION
It is one object of the present invention to provide a yellow reactive dye composition with good dyeing stability and good build-up.
According to the present invention, it provided a yellow reactive dye composition which comprises:
(a) a reactive dye of the formula (I)
wherein:
R
1
is selected from the group consisting of hydrogen, alkyl having 1-4 carbon atoms, cyanoalkyl having 2-4 carbon atoms, or a sulfuric acid ester of a hydroxy alkyl having 2-4 carbon atoms; each R
2
, R
3
, R
4
, and R
5
independently is selected from the group consisting of hydrogen, halogen (for example fluorine, chlorine, bromine or iodine), methyl, ethyl, methoxy, ethoxy; and
(b) a reactive dye of the formula (II)
wherein:
each Y
1
and Y
2
independently is alkyl having 1-4 carbon atoms, or alkoxy having 1-4 carbon atoms;
each Y
3
, Y
4
and Y
5
independently is selected from the group consisting of hydrogen, halogen (for example fluorine, chlorine, bromine or iodine), methyl, or sulphonic acid.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
The preparation of formula (I) of the present invention is described in U.S. Pat. No. 4,271,072. The synthesis of formula (II) of the present invention can be found in German patent Offenlegungsschrift No. 1,150,163.
There is no special limit to the reactive dye represented by formula (I). Preferably, the reactive dye represented by formula (I) could be the reactive dye represented by the following formula (III):
wherein:
R
1
′ is —CH
2
CH
3
or —CH
2
CH
2
—OSO
3
H;
R
3
′ is hydrogen or chlorine.
More preferably, the reactive dye represented by formula (I) could be the reactive dye represented by the following formula (I-1).
There is no special limit to the reactive dye represented by formula (II). Preferably, the reactive dye represented by formula (II) could be the reactive dye represented by the following formula (II-1):
The compositions of the present invention can be prepared in several ways, i.e. by using the separately prepared dye component to mix together to make power, granular and liquid forms, or by mixing two individual dyes as a dyeing recipe in a dyehouse. The dyes of formula I-1 and II-1 are mixed in a weight ratio of the reactive dye of formula I-1 and the reactive dye of formula II-1 of 15~50 to 50~85.
If necessary, the reactive dye composition of the present invention may contain inorganic salts (e.g. sodium sulfate and sodium chloride), dispersants (e.g. &bgr;-naphthalenesulfonic acid-formaldehyde condensation products, methylnaphthalenesulfonic acid-formaldehyde condensation products, acetylaminonaphthol based compounds, etc.), de-dusting agents (e.g. di-2-ethylhexyl terephthalate), pH buffering agents (e.g. sodiumacetate, sodiumphosphate, etc.), water softeners, well-known dyeing assistants, etc.
The form of the reactive dye composition of the present invention is not critical. The reactive dye composition can be powder, granular or liquid form.
For convenience in the statement, they are expressed as free acid in the specification. When the dyestuff of the present invention is manufactured, purified, or used, it often exists in the form of water-soluble salt, especially an alkaline metallic salt, such as sodium salt, potassium salt, or ammonium salt.
The yellow reactive dye composition of the present invention can be applied to dye or print fiber materials, especially cellulose fiber or materials containing cellulose. There is no special limit to cellulose suitable for the application of the yellow reactive dye composition of the present invention. All natural and regenerated cellulose fiber (e.g. cotton, linen, jute, ramie fiber, viscose rayon) or fiber materials containing cellulose are the materials to which the yellow reactive dye composition can be applied.
The dyeing or printing of the yellow reactive dye composition can be proceeded by usual or known method. Exhaustion dyeing is applied by using usual inorganic salts (e.g. anhydrous sodium sulfate and sodium chloride) and well-known acid-bindingagents (e.g. sodium carbonate, sodiumhydroxide). The amount of inorganic salts here is not important. Inorganic salts and alkali can be added into the dyeing bath through traditional methods either by once or by several times. In addition, dyeing assistants can be added, too. The range of dyeing temperature is from 40° C. to 90° C. Preferably, the temperature for dyeing is from 40° C. to 70° C.
In a cold-pad-batch application, dye, alkali and customary auxiliaries are padded from the liquor through. The padded, squeezed substrate is often rolled onto an A-frame and batched at room temperature to allow dye fixation to take place.
In a continuous dyeing, it can be divided into two different methods. In the one-bath padding application, dye, alkali (e.g. sodium carbonate or sodium bicarbonate) and customary auxiliaries are padded from the liquor through, the padded, squeezed substrate was then dried by either baking or steam. In the two bath padding application, the substrate is padded through a dye solution bath, pre-dried, a alkali (e.g. sodium hydroxide or sodium silicate) bath, then dye fixed by either baking or steam.
In textile printing, there can be exemplified a method which conducts printing a substrate with a printing paste containing, a well-known acid-binding agent (e.g. sodium bicarbonate), thickener, and completing the dye fixation by dry heat or steam. The dyeing or printing methods employed in the process of the present invention are not limited to these methods.
The yellow reactive dye composition of the present invention has good dyeing properties such as build-up, reproducibility and levelness for printing and dyeing.
The present invention is demonstrated in more detail with reference to the following examples, which are only illustrative and are not intended to limit the scope of the present invention.
In these examples, the compound is represented by free acid, but its actual form can be in salt, or more possibly alkali metal salt, especially sodium salt. In these examples, parts and % are counted by weight, and the temperature is Celsius ° C.


REFERENCES:
patent: 4271072 (1981-06-01), Wenghofer et al.
patent: 4448583 (1984-05-01), Corso
patent: 4581036 (1986-04-01), Opitz et al.
patent: 5366512 (1994-11-01), Mischke et al.

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