Bleaching and dyeing; fluid treatment and chemical modification – Reactive dye composition – process – or product – Alkylene sulfato – halotriazine – halodiazine,...
Reexamination Certificate
1999-07-02
2001-01-09
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
06171349
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a reactive dye composition, in particular relates to a black or navy reactive dye composition suitable for use in dyeing fiber materials. It has good property in color fastness to laundering-oxidative bleach response.
BACKGROUND OF THE INVENTION
So far, it is difficult to find a single reactive dye which can produce a highblack shade build up property. In order to get a high black shade build up property, a reactive dye composition which contains a plurality of reactive dye components has been used. Usually, one black or navy reactive dye (for example, the following formula (I) black reactive dye) as the major component
is mixed with red, orange, yellow or other shade reactive dye components to get the black reactive dye composition.
Black reactive dye compositions are already known from Japanese Patent Laid-open No. 58-160362, 63-178170, 1-315469, 2-73870, 2-202956, 8-104822, 8-253697, U.S. Pat. No. 5,445,654 and U.S. Pat. No. 5,611,821.
Due to strict requirements in energy saving and environmental regulations, advanced washing machines and highly efficient detergent have been continuously developed. The use of highly efficient detergent greatly improves the cleanness of washed materials. However, washed materials fade soon after several washings. This problem becomes worse if washed materials were dyed by the reactive black dye composition based on the major component of formula (I) black reactive dye. Therefore, there is a strong demand for a reactive black or navy dye composition having good property in color fastness to laundering-oxidative bleach response and wash fastness.
A reactive black or navy dye composition which is comprised of the above formula (I) black reactive dye as the major component and mixed with a plurality of reactive azo dyes fades soon after several washings. The reason is the poor property of the reactive black dye composition in color fastness to laundering-oxidative bleach response. Therefore, washed materials are caused to fade by the bleaching agent present during washing.
If the additional dye components of the dye composition have different color fastness to laundering-oxidative bleach response, the washed material may be caused to fade, and to change its hue as well. The current commercially available black dye compositions commonly have this drawback. Because the formula (I) black reactive dye used in current commercially available black dye compositions has poor property in color fastness to laundering-oxidative bleach response, the hue of the washed material will be caused to change after washing several times if the mixed red, orange, yellow, or other shade of reactive dye components have a better fastness to oxidative bleach, causing the washed black or navy material to change to brown, or some other hue.
In order to eliminate the aforesaid problem, there is a suggestion to select red, orange, yellow, or other shades of reactive dye components having the property of color fastness to laundering-oxidative bleach response approximately equal to the formula (I) black reactive dye. A black dye composition prepared according to this method may eliminate the change of hue, however it cannot prevent the washed material from being caused to fade by the bleaching agent.
SUMMARY OF THE INVENTION
It is one object of the present invention to provide a reactive dye composition that is suitable for use in exhausting, printing, or continuous dyeing of fiber materials, to provide good dying property. It is another object of the present invention to provide a reactive dye composition that has good property in build-up, wash fastness, wash-off, levelness and color fastness to laundering-oxidative bleach response.
The black or navy dye composition of the present invention is comprised of: (a) at least a black or navy reactive dye with good color fastness to laundering-oxidative bleach response; and (b) at least a red, orange, yellow or other shade of reactive azo dye. The reactive dye composition of the present invention may further comprise (c) a black reactive dye of the following formula (I).
In order to improve the characteristics of the reactive dye composition, a black or navy reactive dye of good property in wash fastness and color fastness to laundering-oxidative bleach response is added. This composition effectively eliminates materials from changing -n hue, or fading due to the effect of a bleaching agent.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
A black or navy dye composition in accordance with the present invention is generally comprised of (a) at least a black or navy reactive dye with a good color fastness to laundering-oxidative bleach response and wash fastness, (b) at least a red, orange, yellow or other shade of reactive azo dye. If it is necessary the reactive dye composition of the present invention can further comprise component (c) a black reactive dye of the following formula (I).
There is no special limitation on the black or navy reactive dye of component (a). Any black or navy reactive dye of good property in wash fastness and color fastness to laundering-oxidative bleach response that is compatible to the black reactive dye of formula (I) in dyeing properties, fixation, and dying affinity, can be used.
Preferably, the black or navy reactive dye of component (a) is a compound having the following formula (II)
wherein A′ and B′, each independent, is an aromatic group which is non-substituted or substituted by halogen, C
1
-C
4
alkyl, C
1
-C
4
alkoxyl, sulfonyl, or amino groups, except reactive groups. The compound of formula (II) and tare black reactive dye of formula (I)have similar structure. Both of them are reactive dyes, containing 1-amino-8-hydroxynaphthyl-3,6-disulfonic acid derivative structure, and the compound of formula (II) have some substituted.
Examples of formula (II) are:
wherein Y and Y′, each independent, is —SO
2
X, —NH—W,
X is —OH, —CH═CH
2
, —C
2
H
4
OSO
3
H, or —C
2
H
4
Cl, T is —NHCN, —F, or —Cl, P is hydrogen, halogen, C
1
-C
4
alkyl, or C
1
-C
4
alkoxyl, R
5
is —Cl or C
1
-C
4
alkoxyl, R
1
, R
2
, R
3
and R
4
, each independent, is hydrogen, halogen, hydroxy, C
1
-C
4
alkyl, C
1
-C
4
alkoxyl, or sulfonyl groups.
More preferably examples of formula (III) and formula (IV) are:
There is no special limitation on the red, orange, yellow or other shade of reactive azo dye of component (b). Any red, orange, yellow or other shade of reactive azo dye of good property in build-up dyeing that is compatible to component (c) the black reactive dye of the formula (I) in dyeing properties, fixation and dying affinity, can be used.
Preferably, the examples of red, orange, yellow or other shade of reactive azo dye of component (b) are:
A is —OH, —NH
2
or —CH
3
, R
6
is —CO
2
H, —NH
2
or —CH
3
, Q is —CO
2
H or —SO
3
H, R
7
and R
8
, each independent, is hydrogen, C
1
-C
4
alkyl, amino or amino derivatives, n is 0, 1, 2, or 3, wherein X, Y, Y′, R
1
, R
2
, R
3
, R
4
and T are defined as the above.
More specific examples of componenmt (b) are:
The composition of the present invention can be prepared in many ways. For example, by using separately prepared dye components mixing each dye together, or, by mixing one component alone then with another component. The way of mixing is by using a proper mixer, for example, a ball and sand grinder. In the same way, individual dye with different components can make a dyeing liquid through stirring, or through control of conditions in each dye preparation to produce an ideal mixture. In the process of exhausting or printing, separate dyes can be mixed together or mixed with other dyes.
The dyestuff of the present invention can be in the form of powder, granular, particle, or liquid; and an auxiliary reagent, for example, a retarding agent, levelling agent, assistant agent, surfactant, or dispersing agent may be added.
The dyestuffs of the present invention all contain an anion group, such as a sulfonic acid group. For convenience in the statement, they are expressed as free acid
Lai Bao-Kun
Song Der-Chin
Bacon & Thomas
Einsmann Margaret
Everlight USA, Inc.
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