CN110041731A - Leather reddish brown dyestuff and preparation method thereof - Google Patents
Leather reddish brown dyestuff and preparation method thereof Download PDFInfo
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- CN110041731A CN110041731A CN201810040279.4A CN201810040279A CN110041731A CN 110041731 A CN110041731 A CN 110041731A CN 201810040279 A CN201810040279 A CN 201810040279A CN 110041731 A CN110041731 A CN 110041731A
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- leather
- reddish brown
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- dyestuff
- sodium
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
- C09B69/00—Dyes not provided for by a single group of this subclass
- C09B69/10—Polymeric dyes; Reaction products of dyes with monomers or with macromolecular compounds
- C09B69/106—Polymeric dyes; Reaction products of dyes with monomers or with macromolecular compounds containing an azo dye
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P1/00—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed
- D06P1/02—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using azo dyes
- D06P1/04—General processes of dyeing or printing textiles, or general processes of dyeing leather, furs, or solid macromolecular substances in any form, classified according to the dyes, pigments, or auxiliary substances employed using azo dyes not containing metal
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06P—DYEING OR PRINTING TEXTILES; DYEING LEATHER, FURS OR SOLID MACROMOLECULAR SUBSTANCES IN ANY FORM
- D06P3/00—Special processes of dyeing or printing textiles, or dyeing leather, furs, or solid macromolecular substances in any form, classified according to the material treated
- D06P3/02—Material containing basic nitrogen
- D06P3/04—Material containing basic nitrogen containing amide groups
- D06P3/32—Material containing basic nitrogen containing amide groups leather skins
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Coloring (AREA)
- Treatment And Processing Of Natural Fur Or Leather (AREA)
Abstract
The present invention relates to a kind of leather reddish brown dyestuffs and preparation method thereof, belong to direct dyes field.The reddish brown dyestuff of this kind of leather, according to parts by weight, its raw material includes: 280~320 parts of two anthroic acid sodium, 160~200 parts of sodium nitrite, 500~520 parts of hydrochloric acid, 4,210~236 parts of 4 '-diaminobenzils-disulfonic acid, 13~27 parts of sodium acetate, 70~90 parts of water, 12~24 parts of bisphenol-A polyoxyethylene ether, 2- [2- [bis- (2,6- 3,5-dimethylphenyl) methoxyl group] ethyoxyl]-N, 12~24 parts of N- dimethyl amine.It is vivid using the leather surface color after this kind of reddish brown dyestuff colouring, and substantially increase solarization fastness, water resistance and the frictional property of resistance to dry and wet of the reddish brown dye coating of leather surface, solve that leather and fur products coloring effect is poor, and the problem of resistance to jail property difference.
Description
Technical field
The present invention relates to direct dyes fields, more specifically, it is related to a kind of leather reddish brown dyestuff and its preparation side
Method.
Background technique
It can be dissolved in water and solvent, and the coloring matter with certain fastness is known as dyestuff.Wherein, by the protein of leather
The dyestuff of stock-dye is known as leather dyestuff.Leather is with dyestuff in addition to requiring chromatic colour, and the leather after coloring is also
Need to have good affinity and fastness, such as shine fastness, water resistance, the frictional property of resistance to dry and wet etc..
Currently, common leather dye is divided into acid dyes and direct dyes two major classes.Acid dyes is a kind of anion
Type dye is needed for leather to be dyed to be placed in acid rinse bath and is pre-processed during using acid dyes, Cai Nengjin
The subsequent colouring work of row.Therefore acid stronger medium can destroy the fiber of leather, greatly shorten the service life of leather, shadow
Ring the quality of leather.
Direct dyes paints to leather surface by the way of directly coating, to reduce strong acid to leather surface
The corrosion of fiber.But the molecular mass of direct dyes is big, infiltration is slow, such as chrysophenine, direct red brown, directly yellowish-brown, direct
Bright red, direct acid blue etc..There are a large amount of protein fibres for leather surface, and surface irregularity, leather is during colouring, directly
Connect dyestuff to be difficult to infiltrate into the tiny texture of leather surface, cause coloring effect poor, and after painting dyestuff solarization fastness, water-fast
Property, the frictional property of resistance to dry and wet are poor.
Summary of the invention
The purpose of the present invention is to provide a kind of leather reddish brown dyestuffs and preparation method thereof, using on this kind of reddish brown dyestuff
Leather surface color after color is vivid, and substantially increases the solarization fastness of the reddish brown dye coating of leather surface, water resistance and resistance to dry
Wet friction.
Above-mentioned purpose of the invention has the technical scheme that a kind of reddish brown dyestuff of leather, by weight
Number meter is measured, raw material includes: 280~320 parts of two anthroic acid sodium, 160~200 parts of sodium nitrite, 500~520 parts of hydrochloric acid, 4,
210~236 parts of 4 '-diaminobenzils-disulfonic acid, 13~27 parts of sodium acetate, 70~90 parts of water, bisphenol-A polyoxyethylene ether
12~24 parts, 2- [2- [bis- (2,6- 3,5-dimethylphenyl) methoxyl groups] ethyoxyl]-N, 12~24 parts of N- dimethyl amine.
Preferably, the bisphenol-A polyoxyethylene ether and 2- [2- [bis- (2,6- 3,5-dimethylphenyl) methoxyl groups] ethyoxyl]-
The mass ratio of N, N- dimethyl amine is 1:1~2.
Preferably, the bisphenol-A polyoxyethylene ether and 2- [2- [bis- (2,6- 3,5-dimethylphenyl) methoxyl groups] ethyoxyl]-
The mass ratio of N, N- dimethyl amine is 1:2.
Preferably, the concentration of the hydrochloric acid is 2.4~2.8g/L.
Another object of the present invention is to provide the leather described above preparation methods of reddish brown dyestuff.
Above-mentioned purpose of the invention has the technical scheme that a kind of preparation of reddish brown dyestuff of leather
Method, comprising the following steps:
S1: taking 4, and 4 '-diaminobenzils-disulfonic acid, water, hydrochloric acid increase temperature of reaction system to 50~60 DEG C, uniformly stirs
After mixing 1~1.4h, temperature of reaction system is reduced to 20~24 DEG C, and sodium nitrite is added and continues 30~40min of stirring；
S2: taking two anthroic acid sodium, water, sodium acetate, increases temperature of reaction system to 21~24 DEG C, after 1~1.6h of uniform stirring, is added
Sodium nitrite continues 30~40min of stirring；
S3: temperature of reaction system is reduced to 15~17 DEG C, obtains being slowly added dropwise the mixed liquor that S1 is obtained in mixed liquor to S2, continues
After 1~1.4h of uniform stirring, bisphenol-A polyoxyethylene ether and 2- [2- [bis- (2,6- 3,5-dimethylphenyl) methoxyl groups] ethoxy is added
Base]-N, N- dimethyl amine, after continuing 30~40min of stirring, leather is prepared with reddish brown dyestuff to alkalinity in adjusting solution
Solution；
S4: leather is dry with reddish brown dye solution, the dyestuff after drying is crushed, leather is prepared with reddish brown dye
Material.
Preferably, in the step S3, the pH value of solution is 7.5~8.
Preferably, the time for the mixed liquor that a dropping step S1 is obtained is 20~30min.
Preferably, in the step S3, the pH value of mixed liquor is adjusted using sodium hydroxide solution, the sodium hydroxide is molten
The concentration of liquid is 1.5~3.3g/L.
Preferably, in the step S1 and step 2, the mass ratio of water is 1:1.
Preferably, in the step S1 and step 2, the mass ratio of sodium nitrite is 3:1.
In conclusion the invention has the following advantages:
1, leather, which is prepared, in the present invention has good service performance with reddish brown dyestuff, using this kind of leather on reddish brown dyestuff
Leather surface color after color is vivid, and the solarization fastness of the reddish brown dye coating of leather surface, water resistance and the frictional property of resistance to dry and wet are equal
Improve 20% or more.
2, during preparing the reddish brown dyestuff of leather, bisphenol-A polyoxyethylene ether and 2- [2- [bis- (2,6- dimethyl benzenes
Base) methoxyl group] ethyoxyl]-N, N- dimethyl amine grafts on the C=C and N=N of dyestuff, meanwhile, pass through and adjusts reaction item
Part makes to be grafted more hydrophilic radical in the macromolecular of dyestuff.During using leather reddish brown dyestuff, bisphenol-A polyoxy second
Alkene ether and 2- [2- [bis- (2,6- 3,5-dimethylphenyl) methoxyl groups] ethyoxyl]-N, the hydrophilic radical in N- dimethyl amine are quickly inhaled
Leather surface is invested, dyestuff macromolecular is rapidly filled at the tiny texture of leather, improves the permeance property of dyestuff, leather
The reddish brown dye coating even compact that surface is formed, solarization fastness, water resistance and the frictional property of resistance to dry and wet of reddish brown dye coating greatly improve.
Specific embodiment
All substances involved in the embodiment of the present invention are commercially available.
One, embodiment is made
Embodiment 1
S1: 4 are taken, 4 '-diaminobenzils-disulfonic acid 223kg, water 40kg, hydrochloric acid 510kg, wherein the concentration of hydrochloric acid is
2.6g/L increases temperature of reaction system to 55 DEG C, after uniform stirring 1.2h, reduces temperature of reaction system to 22 DEG C, nitrous is added
Sour sodium 135kg continues to stir 35min；
S2: taking two anthroic acid sodium 300kg, water 40kg, sodium acetate 20kg, increases temperature of reaction system to 22.5 DEG C, uniform stirring
After 1.3h, sodium nitrite 45kg is added, continues to stir 35min；
S3: temperature of reaction system is reduced to 16 DEG C, obtains being slowly added dropwise the mixed liquor that S1 is obtained, time for adding in mixed liquor to S2
For 25min, continue uniform stirring 1.2h after being added dropwise, bisphenol-A polyoxyethylene ether 12kg, 2- [2- [bis- (2,6- is added later
3,5-dimethylphenyl) methoxyl group] ethyoxyl]-N, N- dimethyl amine 24kg, continue after stirring 35min, utilize sodium hydroxide solution
PH value of solution is adjusted to 8, the reddish brown dye solution of leather is prepared, wherein the concentration of sodium hydroxide is 2.4g/L；
S4: leather is dry with reddish brown dye solution, the dyestuff after drying is crushed, leather is prepared with reddish brown dye
Material.
Embodiment 2
S1: 4 are taken, 4 '-diaminobenzils-disulfonic acid 210kg, water 35kg, hydrochloric acid 500kg, wherein the concentration of hydrochloric acid is
2.8g/L increases temperature of reaction system to 60 DEG C, after uniform stirring 1h, reduces temperature of reaction system to 22 DEG C, nitrous acid is added
Sodium 150kg continues to stir 30min；
S2: taking two anthroic acid sodium 280kg, water 35kg, sodium acetate 13kg, increases temperature of reaction system to 24 DEG C, uniform stirring 1.6h
Afterwards, sodium nitrite 40kg is added, continues to stir 35min；
S3: temperature of reaction system is reduced to 17 DEG C, obtains being slowly added dropwise the mixed liquor that S1 is obtained, time for adding in mixed liquor to S2
For 20min, continue uniform stirring 1h after being added dropwise, bisphenol-A polyoxyethylene ether 18kg, 2- [2- [bis- (2,6- bis- is added later
Aminomethyl phenyl) methoxyl group] ethyoxyl]-N, N- dimethyl amine 18kg, continue after stirring 40min, utilize sodium hydroxide solution tune
PH value of solution is saved to 8, the reddish brown dye solution of leather is prepared, wherein the concentration of sodium hydroxide is 1.5g/L；
S4: leather is dry with reddish brown dye solution, the dyestuff after drying is crushed, leather is prepared with reddish brown dye
Material.
Embodiment 3
S1: 4 are taken, 4 '-diaminobenzils-disulfonic acid 236kg, water 35kg, hydrochloric acid 500kg, wherein the concentration of hydrochloric acid is
2.8g/L increases temperature of reaction system to 50 DEG C, after uniform stirring 1.4h, reduces temperature of reaction system to 24 DEG C, nitrous is added
Sour sodium 150kg continues to stir 30min；
S2: taking two anthroic acid sodium 320kg, water 35kg, sodium acetate 13kg, increases temperature of reaction system to 24 DEG C, after uniform stirring 1h,
Sodium nitrite 50kg is added, continues to stir 40min；
S3: temperature of reaction system is reduced to 17 DEG C, obtains being slowly added dropwise the mixed liquor that S1 is obtained, time for adding in mixed liquor to S2
For 20min, continue uniform stirring 1.4h after being added dropwise, bisphenol-A polyoxyethylene ether 12kg, 2- [2- [bis- (2,6- is added later
3,5-dimethylphenyl) methoxyl group] ethyoxyl]-N, N- dimethyl amine 12kg, continue after stirring 40min, utilize sodium hydroxide solution
PH value of solution is adjusted to 7.5, the reddish brown dye solution of leather is prepared, wherein the concentration of sodium hydroxide is 3.3g/L；
S4: leather is dry with reddish brown dye solution, the dyestuff after drying is crushed, leather is prepared with reddish brown dye
Material.
Embodiment 4
S1: 4 are taken, 4 '-diaminobenzils-disulfonic acid 210kg, water 35kg, hydrochloric acid 520kg, wherein the concentration of hydrochloric acid is
2.4g/L increases temperature of reaction system to 60 DEG C, after uniform stirring 1.2h, reduces temperature of reaction system to 20 DEG C, nitrous is added
Sour sodium 135kg continues to stir 40min；
S2: taking two anthroic acid sodium 280kg, water 35kg, sodium acetate 27kg, increases temperature of reaction system to 21 DEG C, uniform stirring 1.6h
Afterwards, sodium nitrite 45kg is added, continues to stir 30min；
S3: temperature of reaction system is reduced to 16 DEG C, obtains being slowly added dropwise the mixed liquor that S1 is obtained, time for adding in mixed liquor to S2
For 30min, continue uniform stirring 1h after being added dropwise, bisphenol-A polyoxyethylene ether 12kg, 2- [2- [bis- (2,6- bis- is added later
Aminomethyl phenyl) methoxyl group] ethyoxyl]-N, N- dimethyl amine 24kg, continue after stirring 30min, utilize sodium hydroxide solution tune
PH value of solution is saved to 8, the reddish brown dye solution of leather is prepared, wherein the concentration of sodium hydroxide is 2.4g/L；
S4: leather is dry with reddish brown dye solution, the dyestuff after drying is crushed, leather is prepared with reddish brown dye
Material.
Embodiment 5
S1: 4 are taken, 4 '-diaminobenzils-disulfonic acid 236kg, water 45kg, hydrochloric acid 520kg, wherein the concentration of hydrochloric acid is
2.4g/L increases temperature of reaction system to 50 DEG C, after uniform stirring 1h, reduces temperature of reaction system to 22 DEG C, nitrous acid is added
Sodium 135kg continues to stir 40min；
S2: taking two anthroic acid sodium 320kg, water 45kg, sodium acetate 27kg, increases temperature of reaction system to 21 DEG C, after uniform stirring 1h,
Sodium nitrite 40kg is added, continues to stir 35min；
S3: temperature of reaction system is reduced to 16 DEG C, obtains being slowly added dropwise the mixed liquor that S1 is obtained, time for adding in mixed liquor to S2
For 30min, continue uniform stirring 1.4h after being added dropwise, bisphenol-A polyoxyethylene ether 24kg, 2- [2- [bis- (2,6- is added later
3,5-dimethylphenyl) methoxyl group] ethyoxyl]-N, N- dimethyl amine 24kg, continue after stirring 30min, utilize sodium hydroxide solution
PH value of solution is adjusted to 7.5, the reddish brown dye solution of leather is prepared, wherein the concentration of sodium hydroxide is 1.5g/L；
S4: leather is dry with reddish brown dye solution, the dyestuff after drying is crushed, leather is prepared with reddish brown dye
Material.
Embodiment 6
S1: 4 are taken, 4 '-diaminobenzils-disulfonic acid 210kg, water 45kg, hydrochloric acid 500kg, wherein the concentration of hydrochloric acid is
2.4g/L increases temperature of reaction system to 60 DEG C, after uniform stirring 1.4h, reduces temperature of reaction system to 24 DEG C, nitrous is added
Sour sodium 120kg continues to stir 40min；
S2: taking two anthroic acid sodium 280kg, water 45kg, sodium acetate 13kg, increases temperature of reaction system to 21 DEG C, uniform stirring 1.6h
Afterwards, sodium nitrite 50kg is added, continues to stir 40min；
S3: temperature of reaction system is reduced to 15 DEG C, obtains being slowly added dropwise the mixed liquor that S1 is obtained, time for adding in mixed liquor to S2
For 30min, continue uniform stirring 1h after being added dropwise, bisphenol-A polyoxyethylene ether 24kg, 2- [2- [bis- (2,6- bis- is added later
Aminomethyl phenyl) methoxyl group] ethyoxyl]-N, N- dimethyl amine 12kg, continue after stirring 30min, utilize sodium hydroxide solution tune
PH value of solution is saved to 8, the reddish brown dye solution of leather is prepared, wherein the concentration of sodium hydroxide is 3.3g/L；
S4: leather is dry with reddish brown dye solution, the dyestuff after drying is crushed, leather is prepared with reddish brown dye
Material.
Two, comparative example is made
Comparative example 1: commercially available direct red brown dyestuff.
Comparative example 2:
S1: 4 are taken, 4 '-diaminobenzils-disulfonic acid 223kg, water 40kg, hydrochloric acid 510kg, wherein the concentration of hydrochloric acid is
2.6g/L increases temperature of reaction system to 55 DEG C, after uniform stirring 1.2h, reduces temperature of reaction system to 22 DEG C, nitrous is added
Sour sodium 135kg continues to stir 35min；
S2: taking two anthroic acid sodium 300kg, water 40kg, sodium acetate 20kg, increases temperature of reaction system to 22.5 DEG C, uniform stirring
After 1.3h, sodium nitrite 45kg is added, continues to stir 35min；
S3: temperature of reaction system is reduced to 16 DEG C, obtains being slowly added dropwise the mixed liquor that S1 is obtained, time for adding in mixed liquor to S2
For 25min, after continuing uniform stirring 1.2h after being added dropwise, pH value of solution is adjusted to 8 using sodium hydroxide solution, skin is prepared
Reddish brown dye solution is removed from office, wherein the concentration of sodium hydroxide is 2.4g/L；
S4: leather is dry with reddish brown dye solution, the dyestuff after drying is crushed, leather is prepared with reddish brown dye
Material.
Three, the performance of the dyestuff in above embodiments and comparative example is tested.
Dyestuff 10g in Example and comparative example is dissolved in the water of 100L, is dyed later to leather.After dyeing
Leather carry out fastness test, with standard fade card for evaluation criterion.
The results are shown in Table 1 for each evaluation index.
The performance test results of dyestuff in each embodiment of table 1 and comparative example
| The performance test results | Leather color | Light fastness | Dry friction | Wet friction | Water resistance |
| Embodiment 1 | Color is vivid, uniform | 4 grades | 4 grades | 4 grades | 4 grades |
| Embodiment 2 | Color is vivid, uniform | 4 grades | 4 grades | 4 grades | 4 grades |
| Embodiment 3 | Color is vivid, uniform | 4 grades | 4 grades | 4 grades | 4 grades |
| Embodiment 4 | Color is vivid, uniform | 4 grades | 4 grades | 4 grades | 4 grades |
| Embodiment 5 | Color is vivid, uniform | 4 grades | 4 grades | 4 grades | 4 grades |
| Embodiment 6 | Color is vivid, uniform | 4 grades | 4 grades | 4 grades | 4 grades |
| Comparative example 1 | Color is vivid, uneven | 2 grades | 3 grades | 2 grades | 2 grades |
| Comparative example 2 | Color is vivid, uneven | 3 grades | 3 grades | 2 grades | 3 grades |
As can be seen that leather, which is prepared, in the present invention has good service performance with reddish brown dyestuff from above-mentioned table, this is used
Leather surface color after kind leather is painted with reddish brown dyestuff is vivid, uniform, and the solarization fastness of the reddish brown dye coating of leather surface,
Water resistance and the frictional property of resistance to dry and wet greatly improve.
Wherein, comparative example 1 is commercially available direct red brown dyestuff, and since the molecular mass of direct red brown dyestuff is big, infiltration is slow,
During colouring, direct dyes is difficult to infiltrate into the tiny texture of leather surface leather, causes coloring effect poor, and after colouring
The solarization fastness of dyestuff, water resistance, the frictional property of resistance to dry and wet are poor.
Bisphenol-A polyoxyethylene ether and 2- [2- [bis- (2,6- 3,5-dimethylphenyl) methoxyl groups] ethoxy are added without in comparative example 2
Base]-N, N- dimethyl amine, during preparing leather reddish brown dyestuff, without hydrophilic grafts into dye molecule chain.?
During using the reddish brown dyestuff of leather, dyestuff is unable to quick adsorption in leather surface, so that dyestuff macromolecular cannot be quick
Ground is filled at the tiny texture of leather, and the reddish brown dye coating for causing leather surface to be formed is unevenly fine and close, leads to reddish brown dyestuff
Solarization fastness, water resistance and the frictional property of resistance to dry and wet of layer reduce.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
Claims (10)
1. a kind of reddish brown dyestuff of leather, characterized in that according to parts by weight, raw material include: 280~320 parts of two anthroic acid sodium,
160~200 parts of sodium nitrite, 500~520 parts of hydrochloric acid, 210~236 parts of 4,4 '-diaminobenzils-disulfonic acid, sodium acetate
13~27 parts, 70~90 parts of water, 12~24 parts of bisphenol-A polyoxyethylene ether, 2- [2- [bis- (2,6- 3,5-dimethylphenyl) methoxyl groups]
Ethyoxyl]-N, 12~24 parts of N- dimethyl amine.
2. the reddish brown dyestuff of leather according to claim 1, characterized in that the bisphenol-A polyoxyethylene ether and 2- [2-
[bis- (2,6- 3,5-dimethylphenyl) methoxyl groups] ethyoxyl]-N, the mass ratio of N- dimethyl amine is 1:1~2.
3. the reddish brown dyestuff of leather according to claim 2, characterized in that the bisphenol-A polyoxyethylene ether and 2- [2-
[bis- (2,6- 3,5-dimethylphenyl) methoxyl groups] ethyoxyl]-N, the mass ratio of N- dimethyl amine is 1:2.
4. the reddish brown dyestuff of leather according to claim 1, characterized in that the concentration of the hydrochloric acid is 2.4~2.8g/L.
5. a kind of prepare the leather as described in claim 1 method of reddish brown dyestuff, characterized in that the following steps are included:
S1: taking 4, and 4 '-diaminobenzils-disulfonic acid, water, hydrochloric acid increase temperature of reaction system to 50~60 DEG C, uniformly stirs
After mixing 1~1.4h, temperature of reaction system is reduced to 20~24 DEG C, and sodium nitrite is added and continues 30~40min of stirring；
S2: taking two anthroic acid sodium, water, sodium acetate, increases temperature of reaction system to 21~24 DEG C, after 1~1.6h of uniform stirring, is added
Sodium nitrite continues 30~40min of stirring；
S3: temperature of reaction system is reduced to 15~17 DEG C, obtains being slowly added dropwise the mixed liquor that S1 is obtained in mixed liquor to S2, continues
After 1~1.4h of uniform stirring, bisphenol-A polyoxyethylene ether and 2- [2- [bis- (2,6- 3,5-dimethylphenyl) methoxyl groups] ethoxy is added
Base]-N, N- dimethyl amine, after continuing 30~40min of stirring, leather is prepared with reddish brown dyestuff to alkalinity in adjusting solution
Solution；
S4: leather is dry with reddish brown dye solution, the dyestuff after drying is crushed, leather is prepared with reddish brown dye
Material.
6. the leather according to claim 5 preparation method of reddish brown dyestuff, characterized in that in the step S3, solution
PH value be 7.5~8.
7. the leather according to claim 5 preparation method of reddish brown dyestuff, characterized in that a dropping step S1 is obtained mixed
The time for closing liquid is 20~30min.
8. the leather according to claim 5 preparation method of reddish brown dyestuff, characterized in that in the step S3, use
Sodium hydroxide solution adjusts the pH value of mixed liquor, and the concentration of the sodium hydroxide solution is 1.5~3.3g/L.
9. the leather according to claim 5 preparation method of reddish brown dyestuff, characterized in that the step S1 and step 2
In, the mass ratio of water is 1:1.
10. the leather according to claim 5 preparation method of reddish brown dyestuff, characterized in that the step S1 and step 2
In, the mass ratio of sodium nitrite is 3:1.
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| CN201810040279.4A CN110041731B (en) | 2018-01-16 | 2018-01-16 | Red brown dye for leather and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810040279.4A CN110041731B (en) | 2018-01-16 | 2018-01-16 | Red brown dye for leather and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110922813A (en) * | 2019-12-05 | 2020-03-27 | 深圳市前海幸运色彩科技有限公司 | Anionic veneer dyeing material and preparation process thereof |
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| US5360472A (en) * | 1992-12-17 | 1994-11-01 | Xerox Corporation | Waterfast dye compositions |
| US5431723A (en) * | 1992-08-20 | 1995-07-11 | Basf Aktiengesellschaft | Use of liquid preparations of a disazo dye in the ink jet process and the diazo dye |
| JP2007291246A (en) * | 2006-04-25 | 2007-11-08 | Mitsubishi Chemicals Corp | Azo dye, composition for anisotropic dye film having the dye, anisotropic dye film, and polarizing element |
| CN105647234A (en) * | 2014-11-13 | 2016-06-08 | 赵建英 | Leather composite red-brown dye synthesis process |
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2018
- 2018-01-16 CN CN201810040279.4A patent/CN110041731B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5431723A (en) * | 1992-08-20 | 1995-07-11 | Basf Aktiengesellschaft | Use of liquid preparations of a disazo dye in the ink jet process and the diazo dye |
| US5360472A (en) * | 1992-12-17 | 1994-11-01 | Xerox Corporation | Waterfast dye compositions |
| JP2007291246A (en) * | 2006-04-25 | 2007-11-08 | Mitsubishi Chemicals Corp | Azo dye, composition for anisotropic dye film having the dye, anisotropic dye film, and polarizing element |
| CN105647234A (en) * | 2014-11-13 | 2016-06-08 | 赵建英 | Leather composite red-brown dye synthesis process |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110922813A (en) * | 2019-12-05 | 2020-03-27 | 深圳市前海幸运色彩科技有限公司 | Anionic veneer dyeing material and preparation process thereof |
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