TW201209245A - Method for reactive dyeing of leather - Google Patents

Abstract

The present invention relates to a method for reactive dyeing of leather, which includes: providing a reactive dye solution including at least one reactive dye and water, and making the reactive dye in the reactive dye solution to act on crust at a temperature from 25 DEG C to 70 DEG C to form covalent bonds between the reactive dye and the crust. Accordingly, the method for reactive dyeing of leather according to the present invention can enhance fastness and level dyeing property.

Description

201209245 VI. Description of the Invention: [Technical Field] The present invention relates to a novel reactive dyeing method for leather, and more particularly to a leather reactive dyeing method suitable for lifting fastness and leveling property. [Prior Art] Dyeing * An important process in the tanning process. At present, the traditional leather dyeing method mainly forms an ionic bond with leather by acid dyeing to obtain dyed leather. However, the alkaline aqueous solution destroys the ionic bond between the leather and the dye, so the dyed leather obtained by the acid dyeing method cannot exhibit excellent washing fastness and sweat fastness. US 20070033746 A1 discloses the use of a dyeing method starting from wet blue skin, showing that reactive dyeing, if started from a wet blue skin, may result in the inability to absorb or re-discharge tannins and oils, resulting in uneven dyeing. Innocent traditional leather dyeing or the method disclosed in US 2〇〇7〇〇33746 A1 • The dyeing method still cannot produce high washing fastness, high sweat fastness, high migration fastness and south uniformity. The dyed skin of the excellent characteristics, etc., the inventor of the present invention has continuously strived and tried to provide a new leather dyeing which can improve the characteristics of dyed leather washing degree, dry/dry fastness, migration fastness, and leveling property. method. SUMMARY OF THE INVENTION 201209245, the object of the present invention is to provide a novel reactive dyeing method for leather, which can produce dyed leather with better sweat fastness, washing fastness, migration fastness, level dyeing and strength. . In order to achieve the above object, the present invention provides a reactive dyeing method for leather comprising: providing a reaction dye water solution comprising at least one reactive dye and water, and at 25 C to 70. (:, the reactive dye in the aqueous solution of the reactive dye acts on a germ, and the reactive dye is covalently bonded to the embryonic skin. Accordingly, the dyeing method provided by the present invention can not only make leather It forms a covalent bond with the reactive dye to improve the sweat fastness, washing fastness and migration fastness, and at the same time does not affect the tannin and oil absorption during the dyeing process, so it can improve the leveling and hand feeling. Compared with the traditional leather dyeing method, the dyeing method provided by the invention can be dyed at a higher temperature, and the dyeing temperature can be even higher than 60 ° C and up to 7 〇. (:, unlike the traditional leather dyeing method, no more than 6 〇t: (especially not more than 5 〇. Limitation of 〇. In the present invention, the reactive dye is preferably 3 (TC to 7 (TC, more preferably at 55 ° C to 70. In the present invention, the type of the embryo skin is not particularly limited, and may be, for example, cow hide, pig skin, sheep skin, etc. In the present invention, the reactive dye may be any conventional reactive dye, which can be used. Single dye or multiple dyes mixed and used, especially this The novel dyeing method provided by Ming will not cause the phenomenon of inconsistent dyeing or infiltration. Therefore, it can be dyed and mixed by a plurality of dyes to dye a large group of color light. Here, the reactive dye used in the present invention preferably contains -so2ch=ch2 201209245 or ·302(:Η2(:Η2\ν group of reactive dyes, where W is treated with alkali

The leaving group, such as -a, -oso3h + 々-VR2 COOH, is «3 and Ri R2 and R3 are each independently alkyl. Examples of reactive dyes suitable for use in the present invention include, but are not limited to: nh2 h2n

-ο

S02C2H40SO3H Yellow dye: Η〇 / , and Everzol Yellow ED, Everzol Yellow NPN, Everzol Yellow LX, Everzol Yellow ED-R, Everzol Yellow GRB

Everzol Yellow PFG, Everzol Yellow 4GL, Everzol Yellow C-GL, Everzol Yellow 3GL, Everzol Yellow ED-2G, Everzol

Yellow RNL, Everzol Yellow GSP, Everzol Yellow ED-S,

Everzol Yellow GR, Everzol Yellow 3RS; Orange dye · nh2

2CH2CH2〇S03H

So2c2h4oso3h and Everzol Orange GR, Everzol Orange 2R, Everzol Orange 2GS sold by Everlight

Everzol Orange ED-2R, Everzol Scarlet 3GF, Everzol Orange GSP, Everzol Orange ED, Everzol Orange 3R, Everzol Orange ED-G, Everzol Orange ED-R; 201209245

And Everzol Red BS, Everzol Red ED-7B, Everzol Red LF-B, Everzol Red ED-2B, Everzol Red ED, Everzol Red F2B, Everzol Red 3BS, Everzol Red ED-S, Everzol Red BB, Everzol Red RBN, Everzol Rubine ED, Everzol Red ED-3R, Everzol Red ED-3B, Everzol Red LX, Everzol Red F3B, Everzol Red LF_2B, Everzol Red C-3B, Everzol Rubine ED-R;

Blue dye

And Everzol Navy Blue GG, Everzol Navy Blue BRF, Everzol Blue ED ' Everzol Navy ED ' Everzol Navy Blue FBN, Everzol Blue ED-G, Everzol Dark Blue LF, Everzol Blue LX, Everzol Blue RS/P, Everzol Turquoise Blue G, 6 201209245

Everzol Navy Blue RGB H/C' Everzol Blue BB ; Brown dye: Everzol Brown LNS sold by Everlight; Black dye: OH NH2 〇 H03S0-CH2—CH;

N=N—~N two N—^ S _CH2-CH2-〇S〇3H ho3s^^^so3h 0 , and Yongguang

The company sells Everzol Black ED-G, Everzol Black GRN, Everzol Black GSP, Everzol Black GR ' Everzol Black ED-2R, Everzol Black MW, Everzol Black B, Everzol Black C-RL, Everzol Black ED, Everzol Black ED- R, Everzol Black N, Everzol Black LNS, Everzol Black NR. The above dyes may be used singly or in combination according to requirements, and in particular, dyes of different color light may be mixed and used to dye a plurality of groups of colored lights. In the present invention, the aqueous reactive dye solution may further comprise a dispersing agent. Here, the dispersing agent may be any conventional dispersing agent having a leveling and dispersing function, and is preferably a dispersing agent containing a naphthalenesulfonic acid condensate such as Evertan PL sold by Everlight. In the present invention, the reactive dye is preferably applied to the embryo skin at a pH of 9 to 11. Here, any suitable alkaline substance or alkaline buffer system (e.g., sodium carbonate, sodium hydrogencarbonate, sodium hydroxide, aqueous ammonia, etc.) may be used to adjust the pH of the reactive dye aqueous solution. In the present invention, the time during which the reactive dye acts on the embryo skin may depend on the actual dyeing conditions (e.g., pH and dyeing temperature), and is preferably from 100 minutes to 330 minutes. 201209245 In the present invention, after the reactive dye acts on the embryo skin, the method further comprises: adding a fixing agent to cause the fixing agent to act on the embryo skin to effectively enhance the fixation of the reactive dye and the leather. Here, the fixing agent may be any conventional fixing agent having a fixed dye function, and is preferably a fixing agent containing a polyamide polymer such as Evertan WF sold by Everlight. In the present invention, after the reactive dye acts on the embryo skin, the method further includes: adding a fat to cause the oil to act on the embryo. Here, the grease may be any grease suitable for the leather fatliquoring step, such as animal oil, vegetable oil, synthetic oil, waterproof oil, etc., which can improve the feel and fullness of the dyed leather, and the step (ie, the fatliquoring step) ) can be performed after the addition of the fixing agent. In the present invention, after the reactive dye acts on the embryo skin, the method further comprises: adding a tannic acid salt to cause the tannic acid salt to act on the embryo skin. Here, the tannic acid salt may be any conventionally used tannic acid salt, especially a metal tannic acid I such as aluminum tannin to improve the dye fixing property and fullness of the dyed leather, and the tannic acid salt. Can be performed after the fatliquoring step. In addition, the addition of the tannic acid salt may further comprise: adding a fixing agent to cause the fixing agent to act on the embryo skin to enhance the fixation of the dye to the leather. As described above, the dyeing method provided by the present invention not only can form a covalent bond between the leather and the reactive wood to improve the sweat fastness, washing fastness, resistance, and fastness of the dyeing process, and at the same time does not affect the single dyeing process. Ning and oil absorption, it can be changed = dyeing and hand feeling. In addition, compared with the traditional leather dyeing method, the dyeing method of the present invention can be dyed at a higher temperature, and the dyeing temperature can be super different from (10) leather (four) More than 6G ° C (especially not 201209245 [Embodiment] The embodiments of the present invention are described below by way of specific embodiments. The details of the present specification may also be based on different viewpoints and applications without departing from the spirit of the invention. Various modifications and changes are made to the τ. The examples are merely exemplified for convenience of description. The patent scope of the present invention is not limited thereby. If not specified, the temperature is Celsius, and the number and percentage are Example 1 Add 600 parts of water, 2 parts of dispersant (Evertan PL) '5 parts of reactive dye (Everzol RedED) to the drum, the temperature is controlled at 60 ° C and rotated ί ο Then, after a piece of 100g was re-twisted, the embryo skin with a thickness of i 2~丨4mm was placed in a rotating drum for 30 minutes, and then 8 parts of sodium carbonate was added for 3 minutes, and the pH was controlled at 9 to 11. Then, 4 was added. The fixing agent (Evertan WF) was rotated for 3 minutes to fix the dye' and then washed three times with 6 parts of water, and the temperature was controlled at 26 C, 40 ° C and 50 ° C for 10 minutes, respectively. Add 2 parts of formic acid to the water. The temperature is controlled at 5〇i, rotated for 15 minutes, and 3 parts of grease (containing tarpaulin) is rotated for 3 minutes, and then fixed with 2 parts of formic acid twice. 15 minutes) and pH control at 3.0 ± 0.5. After washing, add 1 part of citric acid in 4 ° ° C, 600 parts of water for 5 minutes' then add 2 parts of aluminum tannin for 3 minutes, then add 1.5 parts of solid The toner (Evertan WF) was rotated for 30 minutes, then added to 26 ° C, 600 parts of water for 10 minutes to be washed with water, and finally dried to obtain a strong and vivid red skin sample. Example 2 201209245 On the drum 200 parts of water, 2 parts of dispersant (Evertan PL), 4 parts of reactive dye (Everzol Yello) w ED), the temperature is controlled at 5 ° C and rotated for 10 minutes, then after a piece of l〇〇g is re-twisted, the embryo of thickness i 2~丨4〇1〇1 is placed in the drum for 30 minutes. Add 400 parts of water for 1 minute, add 5 parts of sodium carbonate and 1 part of sodium hydroxide for 3 minutes, and control the pH to 9~11. Then, add 3 parts of fixing agent (Evertan WF) to rotate 30 The dye was fixed in minutes, followed by water washing three times with 600 parts of water, and the temperature was controlled at 30 C, 40 C, and 50 C for 10 minutes, respectively. Then, 2 parts of citric acid was added to 6 parts of water, and the temperature was controlled at 5 Torr. (:, rotate for 15 minutes, add 3 parts of grease (including tarpaulin) for 30 minutes, then fix with 2.5 parts of formic acid twice (15 minutes each) and control the pH at 3,0±0.5. After washing, at 40 Add 1 part of formic acid to 〇C, 6 parts of water for 5 minutes, then add 2 parts of aluminum tannin for 3 minutes, then add 1 part of fixing agent (Evertan WF) for 30 minutes, then add 26. 6 smashed water was rotated for 10 minutes 'to be washed with water' and finally dried to obtain a strong and vivid yellow skin sample. Example 3 600 parts of water and 8 parts of reactive dye (Everz) were added to the drum. 〇1 BlackED-G), the temperature is controlled at 7 (TC and rotate for 1 〇 minutes, then a piece of 100g after re-Han, the thickness of 1.2~1.4 mm of the embryo is placed in the drum for 30 minutes, then add 8 parts Sodium carbonate was rotated for 3 minutes, and the pH was controlled at 9 to n. Then, 3 parts of fixing agent (Evertan WF) was added for 30 minutes to fix the dye, followed by washing with 600 parts of water three times, and the temperature was controlled at 3 〇β. (:, 4 〇 <t and 50 ° C for 10 minutes each. Then, add 2 parts of citric acid to 600 parts of water, Degree control at 5 (TC, rotate for 15 minutes, add 3 parts of grease (including hydrazine waterproof oil) 201209245 rotate for 30 minutes' and then fix with 2.5 parts of citric acid twice (15 minutes each) and pH control at 3·0±0.5 ° After washing with water, add 4 parts of formic acid to 4 (TC, 600 parts of water for 5 minutes) and then add 2 parts of aluminum tannin for 3 minutes, then add 丨part fixing agent (Evertan WF) for 30 minutes, then add 26〇c, 6〇0 parts of water was rotated for 10 minutes' to be washed with water, and finally dried to obtain a dark black skin sample. Example 4 600 parts of water was added to the drum' 2 parts of dispersant (Evertan PL) 4 parts of reactive dye (2.6 parts Everzol Yellow ED, 1.1 parts Everzol Red ED and 0.3 parts Everzol Navy ED), the temperature is controlled at 60 ° C and rotated for 10 minutes, then a piece of lOOg is re-twisted, the thickness is 1.2 Place the ~1.4mm embryo skin into the drum for 30 minutes, then add 8 parts of sodium carbonate for 30 minutes, and adjust the pH to 9~11. Then, add 3 parts of fixing agent (Evertan WF) for 3 minutes to fix. The dye was then washed three times with 600 parts of water, and the temperature was controlled at 30 ° C and 40 ° C, respectively. 50 ° C for 10 minutes each. Then 'add 600 parts of formic acid in 600 parts of water, the temperature is controlled at 50 ° C, rotate for 15 minutes, add 3 parts of grease (including hydrazine waterproof oil) for 30 minutes, then 2.5 parts Formic acid was fixed twice (15 minutes each) and the pH was controlled at 3.0 ± 0.5. After washing, add 1 part of citric acid in 4 ° ° C, 600 parts of water for 5 minutes, then add 2 parts of tannin for 3 minutes, then add 1 part of fixing agent (Evertan WF) for 30 minutes, then Join 26. (:, 600 parts of water is rotated for 10 minutes to be washed with water.) Finally, drying is performed to obtain a brown skin sample with good leveling property and uniform penetration. Example 5 201209245 600 parts of water and 2 parts of dispersion are added to the drum. (Evertan PL), 4 parts of reactive dye (Everzol Red ED), the temperature is controlled at 30 ° C and rotated for 10 minutes, then a piece of 100g after re-twisting, the thickness of 1.2~l.4mm of the embryo is placed Rotate in the drum for 3 minutes, add 8 parts of sodium carbonate for 30 minutes, and control the pH to 9~11. Then, add 4 parts of fixing agent (Evertan WF) for 30 minutes to fix the dye, then use 600 parts of water. The water was washed three times, and the temperature was controlled at 26 ° C, 40 ° C and 50 ° C for 10 minutes, respectively. Then, 2 parts of citric acid was added to 600 parts of water, the temperature was controlled at 50 ° C, and the rotation was carried out for 15 minutes. The grease (containing tarpaulin) is rotated for 30 minutes, then fixed with 2,5 parts of citric acid twice (15 minutes each) and the pH is controlled at 3_0±0.5. After washing, at 40. (:, 600 parts of water Add 1 part of formic acid for 5 minutes, then add 2 parts of indole to rotate for 30 minutes' and then add 1.5 parts of fixing agent (Ever Tan WF) was rotated for 30 minutes, then added to 26 ° C, 600 parts of water for 1 minute to wash with water, and finally dried to obtain a medium-visible and vivid red skin sample. Example 6 Add 600 to the drum Parts of water, 4 parts of reactive dye (1.8 parts)

Everzol Yellow ED, 1.6 parts Everzol Red ED and 0.6 parts Everzol Navy ED), the temperature is controlled at 50 ° C and rotated for 10 minutes, then a piece of 100g of the embryo is placed in a drum with a thickness of 1.2~1.4mm. Turn for 30 minutes, add 8 parts of sodium carbonate for 30 minutes, and control the pH at 9~U. Next, 3 parts of fixing agent (Evertan WF) was added for 30 minutes to fix the dye, followed by water washing three times with 600 parts of water, and the temperature was controlled at 3 Torr, 40 ° C and 50 ° C for 10 minutes, respectively. Next, add 2 parts of citric acid to 600 parts of water, control the temperature at 50 ° C, rotate for 15 minutes, and add 3 parts of grease (including tarpaulin) 12 201209245 for 30 minutes, then fix twice with 2.5 parts of formic acid. (15 minutes each) and the pH was controlled at 3.0 ± 0.5. After washing with water, add 1 part of formic acid at 40 ° C, 600 parts of water for 5 minutes, then add 2 parts of aluminum tannin for 30 minutes, then add 1 part of fixing agent (Evertan WF) for 30 minutes, then add 26 ° C, 600 parts of water is rotated for 10 minutes to be washed with water, and finally dried to obtain a dark-skinned skin sample with good leveling property and uniform penetration. Example 7 600 parts of water '2 parts dispersant (Evertan PL), 4 parts of reactive dye (Everzol Brown LNS) were added to the drum, the temperature was controlled at 60 ° C and rotated for 10 minutes, and then a piece of 100 g was passed. After further simmering, the embryo skin having a thickness of 1.2 to 1.4 mm was placed in a rotating drum for 30 minutes, and then 5 parts of sodium carbonate was added for 30 minutes, and the pH was controlled at 9 to 11. Next, 3 parts of fixing agent (Evertan WF) was added for 30 minutes to fix the dye, followed by water washing three times with 600 parts of water, and the temperature was controlled at 30 ° C, 4 (TC and 50 ° C for 10 minutes, respectively). Add 2 parts of citric acid to 600 parts of water, control the temperature at 50 ° C, rotate for 15 minutes, rotate 3 parts of grease (including tarnish oil) for 30 minutes, and then fix it twice with 2.5 parts of formic acid (15 minutes each) And the pH is controlled at 3.0 ± 0.5. After washing with water, add 1 part of formic acid in 40 ° C, 600 parts of water for 5 minutes, then add 2 parts of aluminum tannin for 30 minutes, then add 1 part of fixing agent (Evertan WF) ) Rotating for 30 minutes, followed by adding 26 ° C, 600 parts of water for 10 minutes to wash with water, and finally drying to obtain a brown skin sample with good leveling property and uniform penetration. Example 8 201209245 Adding to the drum 600 parts of water, 2 parts of dispersant (Evertan PL), 4 parts of reactive dye (Everzol Navy ED), the temperature is controlled at 60 ° C and rotated for 10 minutes, then a piece of l〇〇g is re-twisted, thickness Put the 1.2~1.4mm embryo skin into the drum for 30 minutes, then add 4 parts of carbon twice. The sodium was rotated for 15 minutes and the pH was controlled at 9-11. Then, 3 parts of the fixing agent (Evertan WF) was added for 30 minutes to fix the dye, followed by washing with 600 parts of water three times, and the temperature was controlled at 30 ° C, 10 minutes each at 40 ° C and 50 ° C. Next, add 2 parts of formic acid to 600 parts of water, control the temperature at 50 ° C, rotate for 15 minutes, and rotate 3 parts of grease (including tarpaulin) for 30 minutes. The mixture was fixed twice with 2.5 parts of formic acid (15 minutes each) and the pH was controlled at 3.0 ± 0.5. After washing with water, 1 part of citric acid was added in 600 parts of water at 40 ° C for 5 minutes, followed by adding 2 parts of Shaodaning. After 30 minutes, add 1 part of fixing agent (Evertan WF) for 30 minutes, then add 26 ° C, 600 parts of water for 10 minutes to wash with water, and finally dry, to obtain good leveling and good strength. Blue skin sample. Comparative Example 1 200 parts of water, 0.3 parts of rewetting agent and a piece of 1 〇〇g thickness of 1.2 to 1.4 mm wet blue were added to the drum, and the temperature was controlled at 40 ° C. Rotate for 60 minutes. After washing, add 200 parts of water, 3 parts of chrome powder, and control the temperature at 25 °C for 60 minutes. Add 2 parts of neutralized tannin and 2 parts of sodium citrate for 20 minutes, then add 0.5 part of baking soda (sodium bicarbonate) for 50 minutes and then wash with water. Add 150 parts of water, 3 parts of acrylic tannin, 3 parts of resin tannin and 3 parts of polymer tannin, temperature controlled at 25 ° C and rotated for 50 minutes, then washed with water. Add 50 parts of water, 1 part of leveling agent and 1 part of ammonia water, the temperature is controlled After rotating at 25 ° C for 10 minutes, add 3 parts of reactive dye (Everzol 14 201209245

Red ED) run for 40 minutes' add 6 parts of grease for 50 minutes, then add 150 parts of water, control the temperature at 50 °C for 1 minute, add 1.5 parts of tannic acid for 20 minutes, then proceed Washed and dried. Comparative Example 2 200 parts of water was placed in a rotating drum, and 100 g of a wet blue skin having a thickness of 1.1 mm after cutting was placed therein for 20 minutes at 30 °C. Next, dyeing was carried out for 60 minutes using 150 parts of water, 2 parts of a dispersant (Evertan PL), and 5 parts of a reactive dye (Everzol Red ED) at a pH of 4.4 and a temperature of 30 °C. 100 parts of a 15% sodium carbonate solution was added in portions at 50 ° C, and the pH was maintained at 10.0 for 60 minutes to fix the dye. Then, at 4 〇. (:, wash 4 times with 200 parts of water for 10 minutes each time. Adjust the pH to 4.7 by adding 2 parts of water and 7 parts of formic acid. Then, at 35 ° C, the dyed leather is allowed to The newly prepared floating liquid is retanning for 30 minutes, wherein the newly prepared floating liquid is composed of 1 part water, 2 parts of polymerizable shoe material and 2 parts of natural substance-based fat liquid. Then, the float The liquid was mixed with 15 parts of liquid synthetic tanning material, 6 parts of polymeric tanning material, 10 parts of Tara plant material, and rotated for 2 minutes. Then, at 35 C, the process was rotated for 2 hours. In the floating liquid, 8 parts of fish oil-based fat liquid and 2 parts of lecithin-based fat liquid are used to fatten the leather. Finally, 2 parts of concentrated formic acid is used to acidify the leather to ?11 to 3 6, and rotate Processing (7) minutes two-person and 30 minutes once. The dyed, re-tanned and fatliquored leather was further rinsed with 15 ° C cold water for 1 minute, and finally dried. Test Example 15 201209245 Comparative Examples 1 and 2 were implemented with the present invention. The dyed leather prepared in Examples 1 to 8 was subjected to sweat fastness, washing fastness, leveling property, hand feeling and strength ratio The comparison results are shown in the following table. Here, the washing fastness is measured according to IUF 423, and the sweat fastness is determined by the following method: First, preparing brine (2 g of salt dissolved in 100 ml of distilled water) And placed in a 250 ml beaker, and 1 ml of distilled water was placed in another 25 ml beaker. Then, the dyed leather was cut into 5〇8x5〇8mm size test pieces, and the test piece was sandwiched. Between the material fiber cloth (5〇8x5〇8mm size) to prepare two samples of the two Meiji (referred to as the first sample and the second sample respectively), then immersing the first sample in the prepared salt solution Until completely wetted, and gently squeeze out excess liquid, then place the first sample on the bottom plate of the sweat tester. Then, take a clean plastic plate or glass plate and cover it first. On the sample, according to the above steps, immersing the second sample in the distilled water prepared in advance, and stacking it on the plastic plate or the glass plate covered on the first sample, and then homing all the plastic plates or glass plates, and Put the load of 36 kg into the load On the perspiration test machine of the sample piece, screw the screw above the m type test machine to remove the load m from the plate m. Place the tightly packed and sweat-resistant test machine into 33x38cm and seal it. The plastic bag ^ is placed in the preheated oven 381 (the bag mouth is not sealed at this time). I will put 50 ml of the genius water in a 100 ml beaker and put it into the above plastic clothes, and The bag mouth is sealed, and the sealed plastic bag is placed in the oven for more than 24 hours. Then, the beaker is removed and the sweat tester is taken out of the oven. The sample is taken out from the board of the sweat tester and juxtaposed. Do not suck the material of 201209245 water until the sample is completely dry (the test piece cannot be separated from the multi-fiber cloth during the drying process). After drying, the color overflow of distilled water and brine was evaluated to compare the sweat fastness of the dyed leather. "Table 1" Item color skin sweat fastness Washing fastness Uniform dyeing strength Example 1 Red cattle scalp skin excellent and excellent excellent example 2 Yellow cattle 榔 embryo skin excellent and excellent excellent example 3 * Cattle nourishment excellent and excellent Good example 4 掠 榔 榔 榔 榔 榔 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施 实施榔 榔 榔 优 优 优 优 优 优 优 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 It has good leveling property and at the same time has excellent washing fastness and sweat fastness. Compared with the leather dyed in Comparative Example 1, the leather dyeing method provided by the embodiment of the present invention can produce dyed leather with better color and strength stability, and the washing fastness, the gram of sweat and the dyeing. Sex is excellent. On the other hand, in Comparative Example 2, the reactive dyeing method was started using the wet blue skin, and the tanned leather and the oil could not be absorbed or re-discharged during the dyeing process, so that the dyed leather had a leveling property and a feeling of less. Good shortcomings. In contrast, the leather dyeing method of the present invention provided in Examples 1 to 8 of the present invention is based on the dyeing of the embryo skin, so that the tannin absorption and the prevention of oil spitting can be effectively controlled, thereby obtaining a better leveling property. Feel the dyed leather. Further, the dyed leathers obtained in Examples 1 to 8 of the present invention were also superior to the leather dyed in Comparative Example 2 in terms of the sweatiness and washing fastness. The above-described embodiments are merely examples for the convenience of the description, and the scope of the claims is intended to be limited by the scope of the claims. [Simple description of the schema] 益〇 »«*\ [Main component symbol description]

Claims (1)

201209245 VII. Patent application scope: 1. A reactive dyeing method for leather, which comprises: providing an aqueous solution of a reactive dye comprising at least one reactive dye and water, and making the reactive dye at 251 to 70 ° C The reactive dye in the aqueous solution acts on a germ' to covalently bond the reactive dye to the embryo. 2. The method of reactive dyeing of leather as described in claim 1 wherein the reactive dye contains a _s〇2CH=CH4_s〇2CH2CH2W group, and the W system is treated to leave the group. 3. For the reactive dyeing method of leather according to item 2 of the patent application scope, wherein W is -C1, _〇s〇3H '1^^^_ or R, I, I are each independently (^^alkyl. 4. Reactive dyeing of leather as described in claim 1 of the patent scope nh2 SO2C2H4OSO3H H2NH0^n=n"O^ HO3S a method, wherein the reactive dye is selected from 19 201209245 H〇3SO—CH^—CH2— So2ch2ch2oso3h H03SO-CH2-CH2 ho3s So3h 0 ch2-ch2-oso3h Everzol Yellow ED, Everzol Yellow NPN, Everzol Yellow LX, Everzol Yellow ED-R, Everzol Yellow GRB, Everzol Yellow PFG, Everzol Yellow 4GL, Everzol Yellow C-GL, Everzol Yellow 3GL, Everzol Yellow ED -2G, Everzol Yellow RNL ' Everzol Yellow GSP, Everzol Yellow ED-S, Everzol Yellow GR, Everzol Yellow 3RS ' Everzol Orange GR ' Everzol Orange 2R, Everzol Orange 2GS, Everzol Orange ED-2R, Everzol Scarlet 3GF, Everzol Orange GSP , Everzol Orange ED, Everzol Orange 3R, Everzol Orange ED-G, Everzol Orange ED-R, Everzol Red BS, Everzol Red ED-7B ' Everzol Red LF-B, Everzol Red ED-2B, Everzol Red ED, Everzol Red F2B , Everzol Red 3BS, Everzol Red ED-S, Everzol Red BB, Everzol Red RBN, Everzol Rubine ED, Everzol Red ED-3R, Everzol Red ED-3B, Everzol Red LX, Everzol Red F3B, Everzol Red LF-2B, Everzol Red C-3B, Everzol Rubine ED-R, Everzol Navy Blue GG, Everzol Navy Blue BRF, 201209245 Everzol Blue ED, Everzol Navy ED Everzol Navy Blue FBN ' Everzol Blue ED-G ' Everzol Dark Blue LF ' Everzol Blue LX, Everzol Blue RS/P, Everzol Turquoise Blue G, Everzol Navy LX, Everzol Navy Blue RGB H/C, Everzol Blue BB, Everzol Brown LNS Everzol Black ED-G, Everzol Black GRN ' Everzol Black GSP ' Everzol Black GR ' Everzol Black ED-2R ' Everzol Black MW ' Everzol Black B ' Everzol Black C-RL, Everzol Black ED, Everzol Black ED-R, Everzol A group consisting of Black ^ N, Everzol Black LNS, Everzol Black NR, and mixtures thereof. 5. The method of reactive dyeing of leather according to claim 1, wherein the aqueous reactive dye solution further comprises a dispersing agent. 6. The reactive dyeing method for leather according to claim 5, wherein the dispersing agent is a dispersing agent containing a naphthalenesulfonic acid condensate. 7. The method of reactive dyeing of leather according to claim 1, wherein the reactive dye is applied to the embryo skin at a pH of 9 to 11. The method of reactive dyeing of leather according to claim 1, wherein the reactive dye acts on the embryo skin for from 100 minutes to 330 minutes. 9. The method of reactive dyeing of leather according to claim 1, wherein after the reactive dye acts on the embryo, the method further comprises: adding a fixing agent to cause the fixing agent to act on the embryo skin. 10. The reactive dyeing method for leather according to claim 9, wherein the fixing agent is a fixing agent containing a polyamide polymer. The method of reactive dyeing of leather according to claim 1, wherein the reactive dye is applied to the embryo skin at 55 ° C to 70 ° C. 22 201209245 IV. Designated representative map: (1) The representative representative of the case is: None. (2) A brief description of the symbol of the representative figure: None. 5. If there is a chemical formula in this case, please disclose the chemical formula that best shows the characteristics of the invention: