Disperse dye mixtures

Abstract: A disperse dye mixture comprising a monoazo dye of the following formula (1) and a monoazo dye of the following formula (2) blended thereto in an amount of from 0.1 to 10 times by weight of the dye of the formula (1): wherein each of X¹ and X² which are independent of each other, is nitro, cyano, sulfomethyl or halogen, each of Y¹, Y², Z¹ and Z² which are independent of one another, is hydrogen, cyano, nitro, trifluoromethyl, halogen or sulfomethyl, each of W¹ and W² which are independent of each other, is hydrogen, halogen, C₁-C₂ alkyl or alkoxy, and each of R¹ and R² which are independent of each other, is C₁-C₄ alkyl, or C₂-C₄ alkyl which is substituted by cyano, halogen, hydroxy, hydroxyalkoxy, C₁-C₄ alkyl, hydroxyalkoxyalkoxy, acyloxyalkoxy, acyloxyalkoxyalkoxy or alkoxyalkoxy.

Description: The present invention relates to a disperse dye mixture which is excellent particularly in both the light-fastness and temperature dependency and which is capable of dyeing polyester fibers in an excellent orange to reddish blue color and a dye mixture having blended to such a disperse dye mixture yellow and blue disperse dyes or a red disperse dye. As automobile seat material, cloths made of polyester fibers have been commonly employed. In recent years, along with the trend for fashionable automobile interior designs, the colors of automobile seats are desired to be colorful. However, the automobile seats are frequently exposed to direct sunlight at high temperatures in closed compartments, whereby seats are likely undergo color fading, and it is difficult to have beautiful colors maintained for a long period of time. Accordingly, as a dye to be used for dyeing polyester fibers for automobile seats, it is desired to employ the one excellent in both the light fastness and temperature dependency. However, heretofore, there have been available little dyes which are excellent in both the light-fastness and temperature dependency, and there has been no dye found to be fully satisfactory as a dye for the automobile seats. For example, the following compounds (A) to (D) are known in Examples 261, 121, 110 and 46, respectively, of Japanese Examined Patent Publication No. 39347/1986. These dyes are excellent in the light-fastness, but their dyeing temperature dependency and dyeing affinity are inadequate when they are used alone. Mixtures of disperse dyes having a structure comparable to the structures of formulae (1) and (2) of Claim 1 are disclosed in DE-A-2062717 ; see Examples 284 to 288. Dyes having the following formulas (E) to (G) are, for example, known as disperse dyes which are excellent in the light-fastness and sublimation fastness when used alone. However, a disperse dye mixture for a practical color such as brown or gray prepared by mixing a yellow disperse dye of the following formula (E), a red disperse dye of the following formula (F) and a blue disperse dye of the following formula (G), is very poor in the light-fastness. For the practical purpose, it is therefore desired that dyes may be mixed to obtain a mixture which does not undergo a deterioration of the light-fastness. A red color covers a wide range of hues from yellowish red to bluish red. To obtain a particular hue, it is often required to blend a red disperse dye with another red disperse dye. In such a case, if an optional red disperse dye is blended, the light-fastness or sublimation fastness will be impaired. Therefore, it is desired to have a mixture whereby the color hue can be adjusted within a wide range while maintaining the light-fastness and sublimation fastness. Under these circumstances, the present inventors have conducted various studies to present a disperse dye which is excellent in both the light-fastness and temperature dependency and which is suitable for dyeing polyester fibers for automobile seats, and as a result, they have found that the above object can be accomplished by a specific dye mixture of the present invention. Namely, the present inventors have conducted various studies on a method for improving the temperature dependency and dyeing affinity of a certain orange to reddish blue disperse dye while maintaining its light-fastness, and as a result, they have found that when this dye is used in combination with another specific orange to reddish blue dye in the form of a mixture, the dyeing properties can be improved remarkably over the single use. The present invention has been accomplished on the basis of this discovery. Thus, in a first aspect, the present invention provides a disperse dye mixture comprising a monoazo dye of the following formula (1) and a monoazo dye of the following formula (2) blended thereto in an amount of from 0.1 to 10 times by weight of the dye of the formula (1): wherein each of X 1 and X 2 which are independent of each other, is nitro, cyano, sulfomethyl or halogen, each of Y 1 , Y 2 , Z 1 and Z 2 which are independent of one another, is hydrogen, cyano, nitro, trifluoromethyl, halogen or sulfomethyl, each of W 1 and W 2 which are independent of each other, is hydrogen, halogen, C 1 -C 2 alkyl or alkoxy, and each of R 1 and R 2 which are independent of each other, is C 1 -C 4 alkyl, or C 2 -C 4 alkyl which is substituted by cyano, halogen, hydroxy, hydroxyalkoxy, C 1 -C 4 alkoxy, hydroxyalkoxyalkoxy, acyloxyalkoxy, acyloxyalkoxyalkoxy or alkoxyalkoxy. Further, a disperse dye mixture obtained by blending a certain yellow disperse dye and a certain blue disperse dye to the orange to reddish blue disperse dye mixture of the monoazo dyes of the above formulas (1) and (2), has been found to have particularly excellent light fastness. A second aspect of the present invention has been accomplished on the basis of this discovery. Thus, in the second aspect, the present invention provides a disperse dye mixture comprising 100 parts by weight of the mixture of a monoazo dye of the formula (1) and a monoazo dye of the formula (2) as defined above, from 2 to 2,000 parts by weight of at least one yellow disperse dye selected from the group consisting of dyes of the following formulas (3) to (7) and from 2 to 2,000 parts by weight of at least one blue disperse dye selected from the group consisting of dyes of the following formulas (8) to (10): wherein R 3 in the formula (3) is C 2 -C 3 alkyl which is substituted by hydroxy or cyano, R 4 in the formula (4) is hydrogen, methyl or halogen, R 5 in the formula (5) is hydrogen or methyl, R 6 in the formula (6) is C 1 -C 3 alkyl which is unsubstituted or substituted by hydroxy or cyano, and R 7 in the formula (7) is hydrogen or C 1 -C 2 alkyl; wherein R 8 in the formula (8) is hydrogen, halogen, hydroxy or hydroxy C 2 -C 3 alkyl, A in the formula (9) is oxygen or -NH-, R 9 in the formula (9) is lower alkoxy lower alkyl or lower alkoxy lower alkoxy lower alkyl, and R 10 in the formula (10) is C 1 -C 2 alkyl. Furthermore, a red disperse dye mixture obtained by blending a certain specific red disperse dye to the orange to reddish blue disperse dye mixture of the monoazo dyes of the above formulas (1) and (2), has been found to retain the excellent light-fastness and sublimation fastness. A third aspect of the present invention has been accomplished on the basis of this discovery. Thus, in the third aspect, the present invention provides a disperse dye mixture comprising 100 parts by weight of the mixture of a monoazo dye of the formula (1) and a monoazo dye of the formula (2) as defined above and from 1 to 100 parts by weight of at least one red disperse dye selected from the group consisting of dyes of the following formulas (11) to (14): wherein Q 11 is C 2 -C 6 alkylene, and R 11 is hydrogen, phenyl, wherein R 121 is hydrogen or methyl, and R 122 is -SO 2 NHC 3 H 6 OC 2 H 5 , -C 2 H 4 COOCH 3 or wherein R 13 is hydrogen or lower alkyl; wherein each of X 141 and X 142 which are independent of each other, is -Q 14 -OH or -Q 14 -O-Q 14 -O-R 14 , wherein Q 14 is C 2 -C 3 alkylene and R 14 is hydrogen, lower alkyl or phenyl. Now, the present invention will be described in detail with reference to the preferred embodiments. In the first aspect of the present invention, the disperse dyes of the formulas (1) and (2) are used in combination as a mixture. The blending ratio is such that the dye of the formula (2) is in an amount of from 0.1 to 10 times by weight, preferably from 0.3 to 4 times by weight, of the dye of the formula (1). If the amount of the dye of the formula (2) is too small or too large, the effects for improving the dyeing affinity and temperature dependency are low. The dye of the formula (2) to be blended to the dye of the formula (1) may be a single dye or a mixture of dyes of the formula (2). In the above formulas (1) and (2), X 1 and X 2 independently represent nitro, cyano, sulfomethyl or halogen. The halogen is preferably chlorine or bromine. X 1 and X 2 are preferably the same. It is particularly preferred that X 1 and X 2 are nitro. Each of Y 1 , Y 2 , Z 1 and Z 2 which are independent of one another, is hydrogen, cyano, nitro, trifluoromethyl, halogen or sulfomethyl. Y 1 , Y 2 , Z 1 and Z 2 may be the same or different. It is particularly preferred that Y 1 and Y 2 are the same and Z 1 and Z 2 are the same. The halogen for Y 1 , Y 2 , Z 1 and Z 2 is preferably chlorine or bromine. A combination of X 1 and X 2 being nitro, Y 1 and Y 2 being cyano and Z 1 and Z 2 being hydrogen is preferred. Each of W 1 and W 2 which are independent of each other, is halogen, C 1 -C 2 alkyl or alkoxy. Particularly preferred is hydrogen. Each of R 1 and R 2 which are independent of each other, is C 1 -C 4 alkyl, or C 2 -C 4 alkyl which is substituted by cyano, halogen, hydroxy, hydroxyalkoxy, C 1 -C 4 alkoxy, hydroxyalkoxyalkoxy, acyloxyalkoxy, acyloxyalkoxyalkoxy or alkoxyalkoxy. Specifically, C 1 -C 4 alkyl may, for example, be methyl, ethyl or straight chain or branched propyl or butyl. C 2 -C 4 alkyl substituted by cyano, halogen or hydroxy, may, for example, be cyanoethyl, chloroethyl, bromoethyl, hydroxyethyl, cyanopropyl, chloropropyl, bromopropyl, hydroxypropyl or hydroxybutyl. C 2 -C 4 alkyl substituted by hydroxyalkoxy, hydroxyalkoxyalkoxy, acyloxyalkoxy or acyloxyalkoxyalkoxy, may, for example, be hydroxyethoxyethyl, hydroxyethoxybutyl, hydroxypropoxyethyl, hydroxypropoxypropyl, hydroxybutoxyethyl, hydroxyethoxyethyl, hydroxypropoxypropoxypropyl, formyloxyethoxyethyl, acetyloxyethoxyethyl, propionyloxyethyl, acetyloxypropoxypropyl or acetyloxypropoxypropoxypropyl. C 2 -C 4 alkyl substituted by C 1 -C 4 alkoxy, may, for example, be methoxyethyl, butoxyethyl, ethoxypropyl, propoxypropyl or methoxybutyl. C 2 -C 4 alkyl substituted by alkoxyalkoxy, may, for example, be methoxyethoxypropyl or ethoxyethoxyethyl. A preferred blending ratio is such that the dye of the formula (2) is in an amount of from 0.25 to 4 times by weight of the dye of the formula (1). In a case where in the above formulas (1) and (2), R 1 and R 2 are both hydroxyethyl, a particularly preferred blending ratio is such that the dye of the formula (2) is in an amount of from 1.5 to 4 times by weight of the dye of the formula (1). Within such a range of the blending ratio, a particularly remarkable improvement is observed in the dyeing affinity and temperature dependency. On the other hand, in the second aspect, the present invention provides a dye mixture prepared by blending at least one yellow disperse dye selected from the group consisting of dyes of the formulas (3) to (7) and at least one blue disperse dye selected from the group consisting of dyes of the formulas (8) to (10) to the orange to reddish blue disperse dye mixture of the monoazo dyes of the formulas (1) and (2), as mentioned above. In the compound of the formula (3), R 3 may specifically be -C 2 H 4 OH, -CH 2 CH(CH 3 )OH, -C 3 H 6 OH, -C 2 H 4 CN or -C 3 H 6 CN. Particularly preferred is -C 2 H 4 OH or -C 2 H 4 CN. In the compounds of the above formulas (4) and (8), the halogen for R 4 or R 8 may, for example, be fluorine, chlorine or bromine. Particularly preferred is chlorine or bromine. In the compound of the formula (6), R 6 may specifically be methyl, ethyl, n-propyl, i-propyl, -C 2 H 4 OH, -C 2 CH(CH 3 )OH, -C 3 H 6 OH, -C 2 H 4 CN or -C 3 H 6 CN. Particularly preferred is -C 2 H 4 OH or -C 2 H 4 CN. In the compound of the formula (7) or (10), C 1 -C 2 alkyl for R 7 or R 10 is methyl or ethyl. In the above formula (8), hydroxy C 2 -C 3 lower alkyl for R 8 is hydroxy lower alkyl such as -C 2 H 4 OH or -C 3 H 6 OH. Particularly preferred is -C 2 H 4 OH. In the formula (9), R 9 may be lower alkoxy lower alkyl such as -C 3 H 6 OCH 3 or -C 3 H 6 OC 3 H 7 , or lower alkoxy lower alkoxy lower alkyl such as -C 2 H 4 OC 2 H 4 OC 2 H 5 or - C 2 H 4 OC 2 H 4 OCH 3 . Preferred is lower alkoxy lower alkyl. The blending ratio for the disperse dye mixture in the second aspect of the present invention is such that at least one yellow disperse dye selected from the group consisting of dyes of the formulas (3) to (7) is in a total amount of from 2 to 2,000 parts by weight, preferably from 10 to 1,000 parts by weight, and at least one blue disperse dye selected from the group consisting of dyes of the formulas (8) to (10) is in a total amount of from 2 to 2,000 parts by weight, preferably from 10 to 1,000 parts by weight, per 100 parts by weight of the orange to reddish blue disperse dye mixture of the monoazo dyes of the formulas (1) and (2). The most preferred blending ratio is such that the yellow disperse dye is from 30 to 500 parts by weight and the blue disperse dye is from 30 to 500 parts by weight, per 100 parts by weight of the above orange to reddish blue disperse dye mixture. In the third aspect, the present invention provides a dye mixture prepared by blending at least one red disperse dye selected from the group consisting of dyes of the the above formulas (11) to (14) to the orange to reddish blue disperse dye mixture of the monoazo dyes of the formulas (1) and (2). In the compound of the formula (11), C 2 -C 6 alkylene for Q 11 may, for example, be -CH 2 CH 2 -, -CH 2 CH 2 CH 2 -, -(CH 2 ) 4 - or -(CH 2 ) 6 -. In the compound of the formula (13) or (14), lower alkyl for R 13 or R 14 may, for example, be methyl, ethyl, n-propyl, i-propyl, or linear or branched butyl. In the compound of the formula (14), C 2 -C 3 alkylene for Q 14 may be -CH 2 CH 2 - or -CH 2 CH 2 CH 2 -. The blending ratio for the disperse dye mixture in the third aspect of the present invention is such that at least one red disperse dye selected from the group consisting of dyes of the formulas (11) to (14) is in an amount of from 1 to 100 parts by weight, preferably from 20 to 60 parts by weight, per 100 parts by weight of the orange to reddish blue disperse dye mixture of the monoazo dyes of the formulas (1) and (2). The disperse dyes of the formulas (1) and (2) can be prepared in accordance with the method disclosed in Japanese Examined Patent Publication No. 39347/1986. With respect to the blending method, the respective dyes of independent structures may be mixed to obtain the dye mixture. Otherwise, such a mixture may be obtained by mixing at least two coupling components during the synthesis of the dyes, followed by a coupling reaction. The disperse dyes of the formulas (3) to (10) are per se known, and can be prepared in accordance with known methods. The disperse dyes of the formulas (11) to (14) are also per se known, for example, in Japanese Examined Patent Publications No. 3299/1963, No. 14316/1965, No. 18179/1968 and No. 1039/1963 and can be prepared in accordance with known methods. Fibers which can be dyed by the disperse dye mixture of the present invention, may, for example, be polyester fibers made of e.g. polyethylene terephthalate or a polycondensation product of terephthalic acid and 1,4-bis(hydroxymethyl)cyclohexane, or blended yarn products or combined filament yarn products of such polyester fibers with other fibers such as cotton, silk, wool, rayon, polyamide or polyurethane. In a case where the fibers are polyester fibers for automobile seats, polyester fibers of from 2 to 5 deniers are preferred, and in a case of fine denier polyester cloths for clothings, polyester fibers of from 0.1 to 1 denier are preferred. The disperse dye mixture of the present invention is insoluble or hardly soluble in water. Accordingly, to dye the polyester fibers with the disperse dye mixture of the present invention, a dye bath or a printing paste is prepared by dispersing the mixture in an aqueous medium by using a dispersing agent such as a condensation product of naphthalene sulfonic acid with formaldehyde, a higher alcohol sulfuric acid ester or a higher alkylbenzene sulfonate in accordance with a conventional method, followed by dip dyeing or textile printing. In the case of dip dyeing, a conventional dyeing treatment such as a high temperature dyeing method, a carrier dyeing method or a thermosol dyeing method, may be applied, whereby polyester fibers or blended yarn products thereof can be dyed with excellent fastness. Better results may sometimes be obtained by adding a known acidic substance such as formic acid, acetic acid, phosphoric acid or ammonium sulfate to the dye bath. The pH of the dye bath is usually preferably adjusted within a range of from 5.0 to 9.5. The dyeing temperature may, for example, be at a level of from 120 to 140°C. Especially when used for exhaustion dyeing, the disperse dye mixture of the present invention exhibits excellent dyeing affinity and temperature dependency. There is no particular restriction as to the dyeing conditions for exhaustion dyeing. For example, the dyeing temperature is at a level of from 120 to 140°C, the dyeing time is from 30 to 60 minutes, and the pH of the dye bath is at a level of from 4.0 to 9.5. Further, at the time of dyeing, various leveling agents and/or ultraviolet absorbers may be used in combination. According to the present invention, by blending to a dye of the formula (1) a dye of the formula (2) having a structure similar thereto, it is possible to remarkably improve the temperature dependency and dyeing affinity while maintaining the excellent light-fastness, as compared with a case where the respective dyes are used independently. Further, the disperse dye mixture having the specific yellow and blue disperse dyes or the specific red disperse dye mixed to the mixture of the dyes of the formulas (1) and (2), is excellent in the light-fastness and sublimation fastness and is very useful. Now, the present invention will be described in further detail with reference to Examples. However, it should be understood that the present invention is by no means restricted by such specific Examples. EXAMPLES 1 TO 17 AND COMPARATIVE EXAMPLES 1 TO 17 1 g of one of red disperse dyes (1-1) to (1-12) as identified in Table 1, one of red disperse dyes (2-1) to (2-12) as identified in Table 2 or a dye mixture having a dye in Table 1 and a dye in Table 2 blended in the proportions as identified in Table 3, was dispersed in 3 ℓ of water containing 1 g of a naphthalene sulfonic acid-formaldehyde condensation product and 2 g of a higher alcohol sulfuric acid ester to obtain a dye bath. In this dye bath, 100 g of polyester fibers were dipped and dyed at 130°C for 60 minutes, followed by soaping, washing with water and drying to obtain a red dyed cloth. The light-fastness, sublimation fastness and water fastness of the dyed cloth as well as the temperature stability and pH stability of the above dye during the dyeing operation were excellent in each case. Further, the dye tinted to the cloth was dissolved and extracted with a 0.1% phosphoric acid solution in dimethylformamide and subjected to colorimetry, whereupon the tinted dye density (relative value) of each cloth in each Example was calculated on the basis of the tinted density of Test No. 1-1 in Example No. 1 being 100 (standard) and shown in Table 3. Further, with respect to a cloth dyed under the same dyeing conditions as described above except that the dyeing temperature was changed to 120°C, the tinted dye density was calculated in the same manner, whereupon the temperature dependency was determined in accordance with the following formula. The results are shown in Table 3. Temperature dependency (%) = (Tinted dye density when dyed at 120°C for 60 minutes/Tinted dye density when dyed at 130°C for 60 minutes) × 100 EXAMPLES 18 TO 23 AND COMPARATIVE EXAMPLE 18 Using red disperse dye No. (1-1) in Table 1 and red disperse dye No. (2-1) in Table 2, experiments were conducted in the same manner as in Examples 1 to 17, except that the blending ratio was changed as identified in Table 4. The results are shown in Table 4. It is evident from the results of Examples 18 to 20 that with the compounds of the formulas (1) and (2) wherein both R 1 and R 2 are hydroxyethoxyethyl, the dyeing affinity and temperature dependency are improved when the blending ratio of the compound of the formula (2) to the compound of the formula (1) is within a range of from 1:1.5 to 1:4. Dyes used (g) Tinted dye density Temperature dependency (%) [1 -1] [2 -1] Example 18 0.2 0.8 130 75 Example 19 0.3 0.7 135 80 Example 20 0.4 0.6 132 77 Example 21 0.7 0.3 115 50 Example 22 0.1 0.9 114 55 Example 23 0.8 0.2 105 40 Comparative Example 18 0.05 0.95 92 40 EXAMPLE 24 140 g of a lignin sulfonic acid-formaline condensation product and 650 g of water were mixed to 60 g of a disperse dye mixture comprising 25 parts by weight of monoazo dye No. (1-1) in Table 1 and 75 parts by weight of monoazo dye No. (2-1) in Table 2, and the mixture was pulverized in a wet system by a sand grinder, followed by spray drying. To 0.07 g of this powdery disperse dye mixture, 0.08 g of a nonionic leveling agent (Diaserver® LR-PSL, manufactured by Mitsubishi Kasei Corporation), 0.10 g of an ultraviolet absorber (Sunlife LP-100, tradename, manufactured by Nikka Kagaku K.K.) and 150 ml of water were added, and the resulding dye bath was adjusted to pH5.5. To the dye bath, 5 g of a polyester cloth was introduced and subjected to exhaustion dyeing at 130°C for one hour, followed by soaping, washing with water and drying to obtain a red-dyed cloth. The light-fastness of this dyed cloth was measured by a JIS test method (JIS L-0843) modified for testing automobile seats (the temperature was 89°C±5°C, a soft polyurethane foam (10 mm) was lined on the rear side of the test cloth, and the fastness was evaluated by the color fading scale stipulated in JIS) and found to be grade 4-5. EXAMPLE 25 150 ml of water was added to 0.2 g of a powdery disperse dye mixture prepared in accordance with Example 24, and the resulting dye bath was adjusted to pH7. To this dye bath, 5 g of a fine denier polyester cloth (yarn size: 0.8 denier) was introduced and subjected to exhaustion dyeing at 135°C for 60 minutes, followed by reduction cleaning, washing with water and drying in accordance with conventional methods to obtain a red-dyed cloth. The light-fastness of this cloth was grade 6 (JIS L-0843 method: 40 hr). EXAMPLES 26 TO 59 AND COMPARATIVE EXAMPLES 26 TO 59 Dyeing and evaluation were conducted in the same manner as in Examples 1 to 17 except that one of the orange to reddish blue disperse dyes as identified in Table 5 or a dye mixture with the composition as identified in Table 5 was used. The light-fastness, sublimation fastness and water fastness of the obtained cloth as well as the temperature stability and the pH dependency during dyeing were excellent in each case. Further, the tinted dye densities and the temperature dependency obtained in the same manner as in Examples 1 to 17 are shown in Table 5. In Table 5, m-Br presented, for example, in the column for W for Example No. 28 means that Br is substituted at the m-position relative to the amino group on the phenylamino group. In the cases presented in Table 5, X 1 and X 2 , Y 1 and Y 2 , Z 1 and Z 2 and W 1 and W 2 in the above formulas (1) and (2) are the same, respectively. Accordingly, with respect to the formulas (1') and (2') in Table 5, they were represented simply by X, Y, Z and W, respectively. EXAMPLE 60 140 g of a lignin sulfonic acid-formaline condensation product and 650 g of water were mixed to 60 g of a disperse dye mixture comprising 25% by weight of a monoazo dye of the following formula (1-60) and 75% by weight of a monoazo dye of the following formula (2-60), and the mixture was pulverized in a wet system by a sand grinder, followed by spray drying. To 0.09 g of this powdery disperse dye mixture, 0.08 g of a nonionic leveling agent (Diaserver® LR-PSL, manufactured by Mitsubishi Kasei Corporation), 0.10 g of an ultraviolet absorber (Sunlife LP-100, tradename, manufactured by Nikka Kagaku K.K.) and 150 ml of water were added, and the resulting dye bath was adjusted to pH5.5. To this dye bath, 5 g of a polyester cloth was introduced and subjected to exhaustion dyeing at 130°C for one hour, followed by soaping, washing with water and drying to obtain a bluish red dyed cloth. The light-fastness of this dyed cloth was measured by a JIS testing method (JIS L-0843) modified for testing automobile seats (the temperature was 89°C±5°C, a soft polyurethane foam (10 mm) was lined on the rear side of the sample cloth, and the light-fastness was evaluated by the color fading scale stipulated in JIS) and found to be grade 4-5. EXAMPLE 61 150 ml of water was added to 0.5 g of a powdery disperse dye mixture prepared in accordance with Example 60, and the resulting dye bath was adjusted to pH7. To this dye bath, 5 g of a fine denier polyester cloth (yarn size: 0.8 denier) was introduced and subjected to exhaustion dyeing at 135°C for 60 minutes, followed by reduction cleaning, washing with water and drying by conventional methods to obtain a bluish red dyed cloth. The light-fastness of this dyed cloth was grade 6 (JIS L-0843 method: 40 hr). EXAMPLE 62 140 g of a lignin sulfonic acid-formaline condensation product and 650 g of water were mixed to a mixture comprising 30 g of a yellow disperse dye of the formula (4) wherein R 4 is H, 20 g of a red disperse dye mixture comprising 40 parts by weight of a dye of the formula (1-1) in Example 1 and 60 parts by weight of a dye of the formula (2-1) in Example 1 and 18 g of a blue disperse dye of the following formula (8-1), and the mixture was pulverized in a wet system by a sand grinder, followed by spray-drying. To 0.085 g of this powdery disperse dye composition, 0.08 g of a nonionic leveling agent (Diaserver® LR-PSL, manufactured by Mitsubishi Kasei Corporation), 0.10 g of an ultraviolet absorber (Sunlife LP-100, tradename, manufactured by Nikka Kagaku K.K.) and 150 ml of water were added. The resulting dye bath was adjusted to pH5.5. To this dye bath, 5 g of a polyester cloth was introduced and subjected to exhaustion dyeing at 130°C for one hour, followed by soaping, washing with water and drying to obtain a brown dyed cloth. The light-fastness of this dyed cloth was measured by a JIS test method (JIS L-0843) modified for testing automobile seats (the temperature was 89°C±5°C, a soft polyurethane foam (10 mm) was lined on the rear side of the sample cloth, and the light-fastness was evaluated by the color fading scale stipulated in JIS) and found to be grade 4-5. Further, with respect to the sublimation fastness, a polyester white cloth was sandwiched between the dyed cloths and contacted at 180°C for 30 minutes, whereupon the staining of the white cloth was evaluated by a gray scale and found to be grade 4. COMPARATIVE EXAMPLE 62 Dyeing was conducted in the same manner as in Example 62 except that the red component was changed from the red disperse dye mixture of the dyes of the formulas (1-1) and (2-1) in Example 1 to 95 g of a disperse dye of the above formula (F) to obtain a brown dyed cloth. Evaluation was conducted in the same manner as in Example 62, whereby the light-fastness was grade 2, and the sublimation fastness was grade 3. EXAMPLES 63 TO 73 A polyester cloth was dyed in the same manner as in Example 62 except that in Example 62, the yellow disperse dye was changed to the dye identified in the following Table 6, followed by evaluation. The hue, light-fastness and sublimation fastness of the dyed cloth are shown in Table 6. EXAMPLES 74 TO 80 A polyester cloth was dyed in the same manner as in Example 62 except that in Example 62, the blue disperse dye was changed to the dye identified in the following Table 7, and the hue, light-fastness and sublimation fastness of the dyed cloth are shown in Table 7. EXAMPLES 81 TO 83 A polyester cloth was dyed in the same manner as in Example 62 except that in Example 62, the blending ratio (weight ratio) of the dyes of the formulas (1-1) and (2-1) in the red disperse dye mixture was changed as identified in the following Table 8, followed by evaluation. The results are shown in Table 8. Example No. (1-1):(2:1) Light-fastness (grade) Sublimation fastness (grade) Hue 81 30:70 4-5 4 Brown 82 10:90 4-5 4 Brown 83 50:50 4-5 4 Brown EXAMPLE 84 150 ml of water was added to 0.25 g of a powdery disperse dye composition prepared in the same manner as in Example 62, and the resulting dye bath was adjusted to pH8.2. To this dye bath, 5 g of a fine denier polyester cloth (yarn size: 0.8 denier) was introduced and subjected to exhaustion dyeing at 135°C for 60 minutes, followed by reduction cleaning, washing with water and drying in accordance with conventional methods to obtain a dark red dyed cloth. The light-fastness of this dyed cloth (JIS L-0843 method: 40 hr) was grade 6 (blue scale). EXAMPLES 85 TO 88 A polyester cloth was dyed in the same manner as in Example 62 except that in Example 62, the amounts of the yellow, red and blue dye components were changed to the proportions as identified in the following Table 9, followed by evaluation. The results are shown in Table 9. Example No. Yellow dye (g) Red dye (g) Blue dye (g) Light-fastness (grade) Sublimation fastness (grade) Hue 85 6 20 18 4-5 4-5 Violet 86 100 20 18 4-5 4 - Dark yellow 87 30 20 6 4-5 4 Yellow brown 88 30 20 100 4-5 4 Dark blue EXAMPLE 89 Dyeing was conducted in the same manner as in Example 62 except that in Example 62, the red disperse dye mixture comprising the dye of the formula (1-1) and the dye of the formula (2-1), was changed to 20 g of a red disperse dye mixture comprising 40% by weight of a monoazo dye of the formula (1) wherein X 1 is -NO 2 , Y 1 is -CN, Z 1 is H, R 1 is -C 3 H 6 OC 2 H 4 OCH 3 , and W 1 is H and 60% by weight of a monoazo dye of the formula (2) wherein X 2 is -NO 2 , Y 2 is -CN, Z 2 is H, R 2 is -C 3 H 6 OC 2 H 4 OCH 3 and W 2 is H, to obtain a brown dyed cloth. The light-fastness and sublimation fastness were evaluated in the same manner as in Example 62. The results are shown in Table 10. COMPARATIVE EXAMPLE 89 Dyeing was conducted in the same manner as in Example 89 except that the red component was changed to 47.5 g of a disperse dye of the above formula (F), to obtain a brown dyed cloth. The light-fastness and sublimation fastness were evaluated in the same manner as in Example 62. The results are shown in Table 10. Light-fastness Sublimation fastness Example 89 Grade 4-5 Grade 4 Comparative Example 89 Grade 2 Grade 3 EXAMPLES 90 TO 96 A polyester cloth was dyed in the same manner as in Example 89 except that in Example 89, the yellow disperse dye was changed to a yellow disperse dye identified in Table 11, followed by evaluation. The hue, light-fastness and sublimation fastness of the dyed cloth are shown in Table 11. Example No. Yellow disperse dye Light-fastness (grade) Sublimation fastness (grade) Hue 90 Same as in Example 63 4 4-5 Brown 91 Same as in Example 64 4-5 4-5 Brown 92 Same as in Example 65 4-5 4-5 Brown 93 Same as in Example 66 4 4 Brown 94 Same as in Example 67 4 4 Brown 95 Same as in Example 68 4-5 4 Brown 96 Same as in Example 69 4-5 4-5 Brown EXAMPLES 97 TO 100 A polyester cloth was dyed in the same manner as in Example 89 except that in Example 89, the blue disperse dye was changed to a blue disperse dye identified in Table 12, followed by evaluation. The hue, light-fastness and sublimation fastness of the dyed cloth are shown in Table 12. Example No. Blue disperse dye Light-fastness (grade) Sublimation fastness (grade) Hue 97 Same as in Example 74 4-5 4 Brown 98 Same as in Example 75 4-5 4 Brown 99 Same as in Example 76 4-5 4 Brown 100 Same as in Example 77 4-5 4 Brown EXAMPLES 101 TO 108 A polyester cloth was dyed in the same manner as in Example 62 except that in Example 62, the red disperse dye mixture was changed to a red disperse dye mixture (blending ratio of (1):(2) = 4:6 (weight ratio)) identified in Table 13, followed by evaluation. The hue, light-fastness and sublimation fastness of the dyed cloth are shown in Table 13. EXAMPLE 109 140 g of a lignin sulfonic acid-formaline condensation product and 650 g of water were added to a mixture comprising 30 g of a red disperse dye mixture comprising 50% by weight of a dye of the formula (1-1) in Example 1 and 50% by weight of a dye of the formula (2-1) in Example 1 and 15 g of a red disperse dye of the following formula (12-1), and the mixture was pulverized in a wet system by a sand grinder, followed by spray drying. To 0.085 g of this powdery disperse dye composition, 0.08 g of a nonionic leveling agent (Diaserver® LR-PSL, manufactured by Mitsubishi Kasei Corporation), 0.10 g of an ultraviolet absorber (Sunlife LP-100, tradename, manufactured by Nikka Kagaku K.K.) and 150 ml of water were added, and the resulting dye bath was adjusted to pH5.5. To this dye bath, 5 g of a polyester cloth was introduced and subjected to exhaustion dyeing at 130°C for one hour, followed by soaping, washing with water and drying to obtain a red dyed cloth. The light-fastness of this dyed cloth was measured by a JIS test method (JIS L-0843) modified for testing automobile seats (the temperature was 89°C±5°C, a soft polyurethane foam (10 mm) was lined on the rear side of the sample cloth, and the light-fastness was evaluated by a color fading scale stipulated in JIS). With respect to the sublimation fastness, a polyester white cloth was sandwiched between the dyed cloths and contacted at 180°C for 30 seconds, whereupon the staining of the white cloth was evaluated by a gray scale. The results are shown in Table 14. COMPARATIVE EXAMPLES 109 TO 111 Dyeing was conducted in the same manner as in Example 109 except that the red disperse dye of the formula (12-1) was changed to one of the following dyes (H) to (J), whereby a red dyed cloth was obtained. The light-fastness and sublimation fastness were measured in the same manner as in Example 109. The results are shown in Table 14. Light-fastness (grade) Sublimation fastness (grade) Example 109 4-5 5 - Comparative Example 109 4 2-3 Comparative Example 110 3 2-3 Comparative Example 111 2-3 5 - EXAMPLES 110 TO 117 A polyester cloth was dyed in the same manner as in Example 109 except that in Example 109, the red disperse dye of the formula (12-1) was changed to a red disperse dye identified in Table 15. The hue, light-fastness and sublimation fastness of the dyed cloth are shown in Table 15. EXAMPLES 118 TO 120 A polyester cloth was dyed in the same manner as in Example 109 except that the blending ratio of the dye of the formula (1-1) to the dye of the formula (2-1) in the red disperse dye mixture used in Example 109 was changed, followed by evaluation. The results are shown in Table 16. Example No. (1-1):(2:1) Light-fastness (grade) Sublimation fastness (grade) Hue 118 30%:70% 4-5 4-5 Red 119 10%:90% 4-5 4-5 Red 120 60%:40% 4-5 4-5 Red EXAMPLES 121 AND 122 Dyeing was conducted in the same manner as in Example 109 except that the amount of the red disperse dye of the formula (12-1) in Example 109 was changed to 1.5 g or 30 g, followed by evaluation. The results are shown in Table 17. Example No. Amount of the disperse dye of the formula (12-1) (g) Light-fastness (grade) Sublimation fastness (grade) Hue 121 1.5 4-5 4-5 Red 122 30 4-5 - 4-5 Red EXAMPLE 123 150 ml of water was added to 0.25 g of a powdery dispersed dye mixture prepared in accordance with Example 109, and the resulting dye bath was adjusted to pH8.2. To this dye bath, 5 g of a fine denier polyester cloth (yarn size: 0.8 denier) was introduced and subjected to exhaustion dyeing at 135°C for 60 minutes, followed by reduction cleaning, washing with water and drying in accordance with conventional methods, to obtain a red dyed cloth. The light-fastness of this dyed cloth (JIS L-0843 method: 40 hr) was grade 6 (blue scale). EXAMPLES 124 TO 141 Dyeing was conducted in the same manner as in Example 109 except that in Example 109, the red dye mixture comprising a dye of the (1-1) and a dye of the formula (2-1) was changed to a red dye mixture comprising a dye of the formula (1') and a dye of the formula (2'), followed by evaluation. The results are shown in Table 18. In the cases in Table 18, X 1 and X 2 , Y 1 and Y 2 , Z 1 and Z 2 , and W 1 and W 2 in the formulas (1) and (2) are the same, respectively. Accordingly, in the formulas (1') and (2') in Table 18, they were simply represented by X, Y, Z and W. Further, the blending ratio of the dye of the formula (1') and the dye of the formula (2') was 1:1 (weight ratio).

Claims: A disperse dye mixture comprising a monoazo dye of the following formula (1) and a monoazo dye of the following formula (2) blended thereto in an amount of from 0.1 to 10 times by weight of the dye of the formula (1): wherein each of X 1 and X 2 which are independent of each other, is nitro, cyano, sulfomethyl or halogen, each of Y 1 , Y 2 , Z 1 and Z 2 which are independent of one another, is hydrogen, cyano, nitro, trifluoromethyl, halogen or sulfomethyl, each of W 1 and W 2 which are independent of each other, is hydrogen, halogen, C 1 -C 2 alkyl or alkoxy, and each of R 1 and R 2 which are independent of each other, is C 1 -C 4 alkyl, or C 2 -C 4 alkyl which is substituted by cyano, halogen, hydroxy, hydroxyalkoxy, C 1 -C 4 alkoxy, hydroxyalkoxyalkoxy, acyloxyalkoxy, acyloxyalkoxyalkoxy or alkoxyalkoxy. The disperse dye mixture according to Claim 1, wherein in the formulas (1) and (2), X 1 and X 2 are nitro. The disperse dye mixture according to Claim 1, wherein in the formulas (1) and (2), X 1 and X 2 are nitro, Y 1 and Y 2 are cyano or halogen, and Z 1 and Z 2 are hydrogen. The disperse dye mixture according to Claim 1, wherein in the formulas (1) and (2), W 1 and W 2 are hydrogen. The disperse dye mixture according to Claim 1, wherein in the formulas (1) and (2), R 1 and R 2 are hydroxyethoxyethyl. The disperse dye mixture according to Claim 1, wherein the monoazo dye of the formula (2) is blended in an amount of from 0.25 to 4 times by weight of the monoazo dye of the formula (1). A disperse dye mixture comprising 100 parts by weight of the mixture of a monoazo dye of the formula (1) and a monoazo dye of the formula (2) as defined in Claim 1, from 2 to 2,000 parts by weight of at least one yellow disperse dye selected from the group consisting of dyes of the following formulas (3) to (7) and from 2 to 2,000 parts by weight of at least one blue disperse dye selected from the group consisting of dyes of the following formulas (8) to (10): wherein R 3 in the formula (3) is C 2 -C 3 alkyl which is substituted by hydroxy or cyano, R 4 in the formula (4) is hydrogen, methyl or halogen, R 5 in the formula (5) is hydrogen or methyl, R 6 in the formula (6) is C 1 -C 3 alkyl which is unsubstituted or substituted by hydroxy or cyano, and R 7 in the formula (7) is hydrogen or C 1 -C 2 alkyl; wherein R 8 in the formula (8) is hydrogen, halogen, hydroxy or hydroxy C 2 -C 3 alkyl, A in the formula (9) is oxygen or -NH-, R 9 in the formula (9) is lower alkoxy lower alkyl or lower alkoxy lower alkoxy lower alkyl, and R 10 in the formula (10) is C 1 -C 2 alkyl. The disperse dye mixture according to Claim 7, wherein the amount of the yellow disperse dye is from 10 to 1,000 parts by weight, and the amount of the blue disperse dye is from 10 to 1,000 parts by weight. The disperse dye mixture according to Claim 7, wherein the amount of the yellow disperse dye is from 30 to 500 parts by weight, and the amount of the blue disperse dye is from 30 to 500 parts by weight. A disperse dye mixture comprising 100 parts by weight of the mixture of a monoazo dye of the formula (1) and a monoazo dye of the formula (2) as defined in Claim 1 and from 1 to 100 parts by weight of at least one red disperse dye selected from the group consisting of dyes of the following formulas (11) to (14): wherein Q 11 is C 2 -C 6 alkylene, and R 11 is hydrogen, phenyl, wherein R 121 is hydrogen or methyl, and R 122 is -SO 2 NHC 3 H 6 OC 2 H 5 , -C 2 H 4 COOCH 3 or wherein R 13 is hydrogen or lower alkyl; wherein each of X 141 and X 142 which are independent of each other, is -Q 14 -OH or -Q 14 -O-Q 14 -O-R 14 , wherein Q 14 is C 2 -C 3 alkylene and R 14 is hydrogen, lower alkyl or phenyl. The disperse dye mixture according to Claim 10, wherein the amount of the red disperse dye selected from the group consisting of dyes of the formula (11) to (14) is from 20 to 60 parts by weight. Polyester fibers dyed with a disperse dye mixture comprising a monoazo dye of the following formula (1) and a monoazo dye of the following formula (2) blended thereto in an amount of from 0.1 to 10 times by weight of the dye of the formula (1): wherein each of X 1 and X 2 which are independent of each other, is nitro, cyano, sulfomethyl or halogen, each of Y 1 , Y 2 , Z 1 and Z 2 which are independent of one another, is hydrogen, cyano, nitro, trifluoromethyl, halogen or sulfomethyl, each of W 1 and W 2 which are independent of each other, is hydrogen, halogen, C 1 -C 2 alkyl or alkoxy, and each of R 1 and R 2 which are independent of each other, is C 1 -C 4 alkyl, or C 2 -C 4 alkyl which is substituted by cyano, halogen, hydroxy, hydroxyalkoxy, C 1 -C 4 alkoxy, hydroxyalkoxyalkoxy, acyloxyalkoxy, acyloxyalkoxyalkoxy or alkoxyalkoxy. Polyester fibers dyed with a disperse dye mixture comprising 100 parts by weight of the mixture of a monoazo dye of the formula (1) and a monoazo dye of the formula (2) as defined in Claim 1, from 2 to 2,000 parts by weight of at least one yellow disperse dye selected from the group consisting of dyes of the following formulas (3) to (7) and from 2 to 2,000 parts by weight of at least one blue disperse dye selected from the group consisting of dyes of the following formulas (8) to (10): wherein R 3 in the formula (3) is C 2 -C 3 alkyl which is substituted by hydroxy or cyano, R 4 in the formula (4) is hydrogen, methyl or halogen, R 5 in the formula (5) is hydrogen or methyl, R 6 in the formula (6) is C 1 -C 3 alkyl which is unsubstituted or substituted by hydroxy or cyano, and R 7 in the formula (7) is hydrogen or C 1 -C 2 alkyl; wherein R 8 in the formula (8) is hydrogen, halogen, hydroxy or hydroxy C 2 -C 3 alkyl, A in the formula (9) is oxygen or, -NH-, R 9 in the formula (9) is lower alkoxy lower alkyl or lower alkoxy lower alkoxy lower alkyl, and R 10 in the formula (10) is C 1 -C 2 alkyl. Polyester fibers dyed with a disperse dye mixture comprising 100 parts by weight of the mixture of a monoazo dye of the formula (1) and a monoazo dye of the formula (2) as defined in Claim 1 and from 1 to 100 parts by weight of at least one red disperse dye selected from the group consisting of dyes of the following formulas (11) to (14): wherein Q 11 is C 2 -C 6 alkylene, and R 11 is hydrogen, phenyl, wherein R 121 is hydrogen or methyl, and R 122 is -SO 2 NHC 3 H 6 OC 2 H 5 , -C 2 H 4 COOCH 3 or wherein R 13 is hydrogen or lower alkyl; wherein each of X 141 and X 142 which are independent of each other, is -Q 14 -OH or -Q 14 -O-Q 14 -O-R 14 , wherein Q 14 is C 2 -C 3 alkylene and R 14 is hydrogen, lower alkyl or phenyl.

Inventors: HAMANO YOSHIHARU, HIHARA TOSHIO, HIMENO KIYOSHI, TSUMURA HIROTSUGU, HAMANO, YOSHIHARU, HIHARA, TOSHIO, HIMENO, KIYOSHI, TSUMURA, HIROTSUGU
Applicants: DYSTAR JAPAN LTD, DYSTAR JAPAN LTD.
Application year: 1992
Main classification: C09B67
IPC codes: D06P3, C09B67, D06P1