High color fastness curtain fabric coating and preparation method thereof

Abstract

The application relates to the technical field of coatings, in particular to high-color-fastness curtain fabric coating and a preparation method thereof, which comprises the following raw materials in parts by weight: 55-65 parts of epoxy resin, 7-8 parts of a curing agent, 2-3 parts of a diluent, 8-12 parts of an additive and 0.8-1.2 parts of an antioxidant. In the application, the ultraviolet protection system is constructed by the synergistic effect of the filler, nano titanium dioxide and powder in the additive. The porous carbon material formed by carbonization of waste wool in the powder can scatter and absorb ultraviolet rays, and the ultraviolet absorption waveband is widened. The surface of the nano titanium dioxide is coated by the synergistic agent to control the photocatalytic activity and play the ultraviolet absorption function without damaging the matrix. The modified chitosan and cellulose nanocrystals in the filler are compounded to solve the problem that the nano titanium dioxide is easy to agglomerate, improve the ultraviolet absorption efficiency, and thus improve the light fastness of the curtain fabric coating.

Description

Technical Field

[0001] This invention relates to the field of coating technology, specifically to a high color fastness curtain fabric coating and its preparation method. Background Technology

[0002] Curtains are a common soft furnishing material in home and commercial environments. There are many different types of curtain fabrics on the market, including polyester, cotton, linen, and silk. They are hung on building doors and windows and have multiple functions such as blocking light, protecting privacy, interior decoration, and regulating light.

[0003] In existing technologies, traditional curtain fabrics are typically colored using dyeing processes. However, prolonged exposure to sunlight exposes the curtains to ultraviolet radiation, which is the primary cause of dye fading. Therefore, this invention provides a high-colorfastness curtain fabric coating and its preparation method. Summary of the Invention

[0004] The purpose of this invention is to provide a high color fastness curtain fabric coating and its preparation method. The curtain fabric coating prepared by this invention not only has good light fastness but also excellent sound insulation performance, effectively improving the performance of the curtain fabric coating.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a high color fastness curtain fabric coating, comprising the following raw materials in parts by weight: 55-65 parts epoxy resin, 7-8 parts curing agent, 2-3 parts diluent, 8-12 parts additives, and 0.8-1.2 parts antioxidant; The raw materials for the additives include fillers, nano titanium dioxide, powder, anhydrous ethanol, silane coupling agent KH-560, melamine, glucose powder and urea; The raw materials for the filler include chitosan, epichlorohydrin, ethylenediamine, anhydrous ethanol, nano-silica, cellulose nanocrystals, and deionized water; The raw materials for the powder include waste wool, zinc chloride solution, and auxiliaries.

[0006] Furthermore, the additive is prepared by the following method: Step 1: Mix the filler, nano titanium dioxide, powder and anhydrous ethanol, stir at 200-300 rpm for 15-25 min, add 8-12% by weight of nano titanium dioxide silane coupling agent KH-560, stir at 300-400 rpm for 30-40 min to obtain the first mixture; Step 2: Mix melamine, glucose and urea, and stir at 70-80℃ and 200-300rpm for 2-3 hours to obtain a second mixture; Step 3: Take the first mixture and the second mixture, mix them at 70-80℃ and 100-200rpm for 2-4 hours, filter to obtain the first filter residue, wash it, and vacuum dry it at 60-80℃ for 8-12 hours to obtain the additive.

[0007] Further, the mass ratio of the filler, nano titanium dioxide, powder and anhydrous ethanol is (0.8-1.2):(0.2-0.25):1:(8-12), the mass ratio of melamine, glucose and urea is 1:(1-2):(0.2-0.4), and the mass ratio of the first mixture and the second mixture is 1:(0.6-0.8).

[0008] Further, the packing material is prepared by the following method: chitosan, epichlorohydrin and ethylenediamine are mixed in a mass ratio of 1:(1.5-2.5):(1-2), anhydrous ethanol of 10-15 times the mass of chitosan is added, and the mixture is stirred at 50-70℃ and 200-300rpm for 6-10h, filtered to obtain a second filter residue, and the second filter residue, nano-silica, cellulose nanocrystals and deionized water are mixed in a mass ratio of 1:(2-4):(1-1.2):(10-15), stirred at 40-60℃ and 100-200rpm for 40-50min, filtered to obtain a third filter residue, washed and dried to obtain the packing material.

[0009] Further, the powder is prepared by the following method: waste wool is washed and dried, crushed and passed through a 100-mesh sieve to obtain wool powder, the wool powder and zinc chloride solution are mixed at a mass ratio of 1:(2-4), stirred at 100-200 rpm for 12-14 h, filtered, the fourth filter residue is taken, washed and dried, heated to 380-420℃ at 5℃ / min under nitrogen protection, kept at the temperature for 1-3 h, washed, dried to obtain coarse material, additives are added, heated at -0.1MPa and 75-85℃ for 1-2 h, cooled, crushed and passed through a 200-mesh sieve to obtain powder.

[0010] Further, the additive is prepared by the following method: keratin, maleic anhydride, and ammonium persulfate are mixed in a mass ratio of 1:(0.5-0.8):(0.05-0.1), stirred at 200-300 rpm for 20-30 min, acetone at 8-12 times the mass of keratin is added, and the mixture is heated at 60-70℃ for 4-5 h. After filtration, the fifth filter residue is collected. The fifth filter residue, polyethylene glycol, attapulgite, and anhydrous ethanol are mixed in a mass ratio of 1:(0.3-0.5):(0.1-0.2):(4-5), and sonicated at 40-60℃, 40-60 kHz, and 200-300 W for 30-50 min. After filtration, the sixth filter residue is collected and dried to obtain the additive.

[0011] Furthermore, the zinc chloride solution has a mass concentration of 30%, and the mass ratio of crude material to additive is 1:(0.8-1.2).

[0012] Furthermore, the attapulgite clay is crushed and passed through a 200-300 mesh sieve.

[0013] Furthermore, the epoxy resin is epoxy resin E51, the curing agent is T-31 curing agent, the diluent is acetone glycerol, and the antioxidant is antioxidant 1076.

[0014] Furthermore, the preparation method of the high color fastness curtain fabric coating includes the following steps: taking epoxy resin, diluent, and antioxidant by weight and mixing them, stirring at 45°C and 400-500 rpm for 15-25 min, adding additives, continuing to stir for 20-30 min, adding curing agent, stirring at 200-300 rpm for 5-10 min, then vacuum degassing at -0.1 MPa for 15-20 min, coating the obtained product onto the surface of the curtain base fabric, heating at 70°C for 20 min, then heating at 90°C for 50 min, and naturally cooling to obtain the high color fastness curtain fabric coating.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. In this invention, an ultraviolet protection system is constructed through the synergistic effect of fillers, nano-titanium dioxide, and powder in the additives. The porous carbon material in the powder, formed by the carbonization of waste wool, can scatter and absorb ultraviolet rays, while also broadening the ultraviolet absorption band. The synergistic additives coat the surface of nano-titanium dioxide, regulating its photocatalytic activity so that it only exerts its ultraviolet absorption function without damaging the matrix. The modified chitosan and cellulose nanocrystals in the filler are combined to solve the problem of easy agglomeration of nano-titanium dioxide, improve the ultraviolet absorption efficiency, and enhance the structural stability of the film layer under long-term light exposure, thereby improving the light fastness of the curtain fabric coating.

[0016] 2. In this invention, the nano-silica and cellulose nanocrystals in the filler serve as rigid reinforcing phases, increasing the reflection path of sound waves inside the membrane. At the same time, the waste wool in the powder is carbonized to form a porous material, and the sound waves undergo multiple reflections and refractions after entering the pores. Furthermore, the polyethylene glycol segments in the additives give the membrane a certain degree of viscoelasticity, which also consumes sound waves. The above synergistic effects improve the sound insulation performance of the curtain fabric coating. Attached Figure Description

[0017] Figure 1 The present invention provides a flowchart of a high color fastness curtain fabric coating and its preparation method. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0019] It should be noted that the raw materials used in the following embodiments are all commercially available. Example 1:

[0020] Raw material preparation for high color fastness curtain fabric coating: 55 parts epoxy resin, 7 parts curing agent, 2 parts diluent, 8 parts additives and 0.8 parts antioxidant; The raw material preparation for the additives includes fillers, nano titanium dioxide, powder, anhydrous ethanol, silane coupling agent KH-560, melamine, glucose powder and urea; The raw materials for the filler include chitosan, epichlorohydrin, ethylenediamine, anhydrous ethanol, nano-silica, cellulose nanocrystals, and deionized water. The raw material preparation for the powder includes waste wool, zinc chloride solution, and auxiliaries.

[0021] Preparation of additives: Step 1: Take filler, nano titanium dioxide, powder and anhydrous ethanol in a mass ratio of 0.8:0.2:1:8 and mix them. Stir at 200 rpm for 15 min. Add 8% by mass of nano titanium dioxide silane coupling agent KH-560 and stir at 300 rpm for 30 min to obtain the first mixture. Step 2: Mix melamine, glucose and urea in a mass ratio of 1:1:0.2 and stir at 70℃ and 200rpm for 2 hours to obtain a second mixture; Step 3: Mix the first mixture and the second mixture at a mass ratio of 1:0.6 at 70℃ and 100rpm for 2 hours, filter to obtain the first filter residue, wash, and vacuum dry at 60℃ for 8 hours to obtain the additive.

[0022] Preparation of the packing material: Chitosan, epichlorohydrin and ethylenediamine were mixed in a mass ratio of 1:1.5:1, and anhydrous ethanol with a mass ratio of 10 times that of chitosan was added. The mixture was stirred at 50℃ and 200 rpm for 6 h, and then filtered to obtain the second filter residue. The second filter residue, nano-silica, cellulose nanocrystals and deionized water were mixed in a mass ratio of 1:2:1:10 and stirred at 40℃ and 100 rpm for 40 min. The mixture was then filtered to obtain the third filter residue, which was washed and dried to obtain the packing material.

[0023] Preparation of powder: Washed and dried waste wool was crushed and passed through a 100-mesh sieve to obtain wool powder. Zinc chloride solution was added and mixed. The mixture was stirred at 100 rpm for 12 hours, filtered, and the fourth filter residue was collected. The residue was washed and dried. Under nitrogen protection, the temperature was increased to 380℃ at 5℃ / min and held for 1 hour. The residue was washed and dried to obtain coarse material. Additives were added and the mixture was heated at -0.1 MPa and 75℃ for 1 hour. After cooling, the residue was crushed and passed through a 200-mesh sieve to obtain powder. The mass ratio of wool powder to zinc chloride solution was 1:2, the mass concentration of zinc chloride solution was 30%, and the mass ratio of coarse material to additives was 1:0.8.

[0024] Preparation of the additive: Keratin, maleic anhydride and ammonium persulfate were mixed and stirred at 200 rpm for 20 min. The resulting product was mixed with acetone and heated at 60 °C for 4 h. After filtration, the fifth filter residue was collected, and polyethylene glycol, attapulgite and anhydrous ethanol were added. The mixture was ultrasonicated at 40 °C, 40 kHz and 200 W for 30 min. After filtration, the sixth filter residue was collected and dried to obtain the additive. The mass ratio of keratin, maleic anhydride and ammonium persulfate was 1:0.5:0.05, the mass of acetone was 8 times the mass of keratin, and the mass ratio of the fifth filter residue, polyethylene glycol, attapulgite and anhydrous ethanol was 1:0.3:0.1:4. The attapulgite was pulverized and passed through a 200-mesh sieve.

[0025] The epoxy resin is epoxy resin E51, the curing agent is T-31 curing agent, the diluent is acetone glycerol, and the antioxidant is antioxidant 1076.

[0026] Preparation of high color fastness curtain fabric coating: Epoxy resin, diluent, and antioxidant are mixed according to weight parts and stirred at 45℃ and 400rpm for 15min. Additives are added and stirring is continued for 20min. Curing agent is added and stirred at 200rpm for 5min. Vacuum degassing is then carried out at -0.1MPa for 15min. The resulting product is coated onto the surface of the curtain base fabric and heated at 70℃ for 20min, then heated at 90℃ for 50min. After natural cooling, a high color fastness curtain fabric coating is obtained. Example 2:

[0027] Raw material preparation for high colorfastness curtain fabric coating: 60 parts epoxy resin, 7.5 parts curing agent, 2.5 parts diluent, 10 parts additives and 1 part antioxidant; The raw material preparation for the additives includes fillers, nano titanium dioxide, powder, anhydrous ethanol, silane coupling agent KH-560, melamine, glucose powder and urea; The raw materials for the filler include chitosan, epichlorohydrin, ethylenediamine, anhydrous ethanol, nano-silica, cellulose nanocrystals, and deionized water. The raw material preparation for the powder includes waste wool, zinc chloride solution, and auxiliaries.

[0028] Preparation of additives: Step 1: Take filler, nano titanium dioxide, powder and anhydrous ethanol in a mass ratio of 1:0.23:1:10 and mix them. Stir at 250 rpm for 20 min. Add 10% of the mass of nano titanium dioxide silane coupling agent KH-560 and stir at 350 rpm for 35 min to obtain the first mixture. Step 2: Mix melamine, glucose and urea in a mass ratio of 1:1.5:0.3 and stir at 75℃ and 250rpm for 2.5h to obtain a second mixture; Step 3: Mix the first mixture and the second mixture at a mass ratio of 1:0.7 at 75℃ and 150rpm for 3 hours, filter to obtain the first filter residue, wash, and vacuum dry at 70℃ for 10 hours to obtain the additive.

[0029] Preparation of the packing material: Chitosan, epichlorohydrin, and ethylenediamine were taken in a mass ratio of 1:2:1.5 and mixed. Anhydrous ethanol with a mass ratio of 12 times that of chitosan was added. The mixture was stirred at 60℃ and 250 rpm for 8 hours and then filtered to obtain the second filter residue. The second filter residue, nano-silica, cellulose nanocrystals, and deionized water were mixed in a mass ratio of 1:3:1.1:12 and stirred at 50℃ and 150 rpm for 45 minutes. The mixture was then filtered to obtain the third filter residue. The residue was washed and dried to obtain the packing material.

[0030] Preparation of powder: Washed and dried waste wool was crushed and passed through a 100-mesh sieve to obtain wool powder. Zinc chloride solution was added and mixed. The mixture was stirred at 150 rpm for 13 hours, filtered, and the fourth filter residue was collected. The residue was washed and dried. Under nitrogen protection, the temperature was increased to 400℃ at 5℃ / min and held for 2 hours. The residue was washed and dried to obtain coarse material. Additives were added and the mixture was heated at -0.1 MPa and 80℃ for 1.5 hours. After cooling, the residue was crushed and passed through a 200-mesh sieve to obtain powder. The mass ratio of wool powder to zinc chloride solution was 1:3, the mass concentration of zinc chloride solution was 30%, and the mass ratio of coarse material to additives was 1:1.

[0031] Preparation of the additive: Keratin, maleic anhydride and ammonium persulfate were mixed and stirred at 250 rpm for 25 min. The resulting product was mixed with acetone and heated at 65℃ for 4.5 h. After filtration, the fifth filter residue was taken and mixed with polyethylene glycol, attapulgite and anhydrous ethanol. The mixture was ultrasonicated at 50℃, 50 kHz and 250 W for 40 min. After filtration, the sixth filter residue was taken and dried to obtain the additive. The mass ratio of keratin, maleic anhydride and ammonium persulfate was 1:0.65:0.07, the mass of acetone was 10 times the mass of keratin, and the mass ratio of the fifth filter residue, polyethylene glycol, attapulgite and anhydrous ethanol was 1:0.4:0.15:4.5. The attapulgite was pulverized and passed through a 250 mesh sieve.

[0032] The epoxy resin is epoxy resin E51, the curing agent is T-31 curing agent, the diluent is acetone glycerol, and the antioxidant is antioxidant 1076.

[0033] Preparation of high color fastness curtain fabric coating: Epoxy resin, diluent, and antioxidant are mixed according to weight parts and stirred at 45℃ and 450rpm for 20min. Additives are added and stirring is continued for 25min. Curing agent is added and stirred at 250rpm for 7min. Vacuum degassing is then carried out at -0.1MPa for 17min. The resulting product is coated on the surface of the curtain base fabric and heated at 70℃ for 20min, then heated at 90℃ for 50min. After natural cooling, high color fastness curtain fabric coating is obtained. Example 3:

[0034] Raw material preparation for high colorfastness curtain fabric coating: 65 parts epoxy resin, 8 parts curing agent, 3 parts diluent, 12 parts additives and 1.2 parts antioxidant; The raw material preparation for the additives includes fillers, nano titanium dioxide, powder, anhydrous ethanol, silane coupling agent KH-560, melamine, glucose powder and urea; The raw materials for the filler include chitosan, epichlorohydrin, ethylenediamine, anhydrous ethanol, nano-silica, cellulose nanocrystals, and deionized water. The raw material preparation for the powder includes waste wool, zinc chloride solution, and auxiliaries.

[0035] Preparation of additives: Step 1: Take filler, nano titanium dioxide, powder and anhydrous ethanol in a mass ratio of 1.2:0.25:1:12 and mix them. Stir at 300 rpm for 25 min. Add 12% of the mass of nano titanium dioxide silane coupling agent KH-560 and stir at 400 rpm for 40 min to obtain the first mixture. Step 2: Take melamine, glucose and urea in a mass ratio of 1:2:0.4 and mix them separately. Stir at 80℃ and 300rpm for 3 hours to obtain the second mixture. Step 3: Mix the first mixture and the second mixture at a mass ratio of 1:0.8 at 80℃ and 200rpm for 4 hours, filter to obtain the first filter residue, wash, and vacuum dry at 80℃ for 12 hours to obtain the additive.

[0036] Preparation of the packing material: Chitosan, epichlorohydrin, and ethylenediamine were mixed in a mass ratio of 1:2.5:2. Anhydrous ethanol, 15 times the mass of chitosan, was added and mixed at 70℃ and 300 rpm for 10 h. After filtration, the second filter residue was obtained. The second filter residue, nano-silica, cellulose nanocrystals, and deionized water were mixed in a mass ratio of 1:4:1.2:15 and stirred at 60℃ and 200 rpm for 50 min. After filtration, the third filter residue was obtained. The residue was washed and dried to obtain the packing material.

[0037] Preparation of powder: Washed and dried waste wool was crushed and passed through a 100-mesh sieve to obtain wool powder. Zinc chloride solution was added and mixed. The mixture was stirred at 200 rpm for 14 hours, filtered, and the fourth filter residue was collected. The residue was washed and dried. Under nitrogen protection, the temperature was increased to 420℃ at 5℃ / min and held for 3 hours. The residue was washed and dried to obtain coarse material. Additives were added and the mixture was heated at -0.1 MPa and 85℃ for 2 hours. After cooling, the residue was crushed and passed through a 200-mesh sieve to obtain powder. The mass ratio of wool powder to zinc chloride solution was 1:4, the mass concentration of zinc chloride solution was 30%, and the mass ratio of coarse material to additives was 1:1.2.

[0038] Preparation of the additive: Keratin, maleic anhydride and ammonium persulfate were mixed and stirred at 300 rpm for 30 min. The resulting product was mixed with acetone and heated at 70 °C for 5 h. After filtration, the fifth filter residue was taken and mixed with polyethylene glycol, attapulgite and anhydrous ethanol. The mixture was ultrasonicated at 60 °C, 60 kHz and 300 W for 50 min. After filtration, the sixth filter residue was taken and dried to obtain the additive. The mass ratio of keratin, maleic anhydride and ammonium persulfate was 1:0.8:0.1, the mass of acetone was 12 times the mass of keratin, and the mass ratio of the fifth filter residue, polyethylene glycol, attapulgite and anhydrous ethanol was 1:0.5:0.2:5. The attapulgite was pulverized and passed through a 300 mesh sieve.

[0039] The epoxy resin is epoxy resin E51, the curing agent is T-31 curing agent, the diluent is acetone glycerol, and the antioxidant is antioxidant 1076.

[0040] Preparation of high color fastness curtain fabric coating: Epoxy resin, diluent, and antioxidant are mixed according to weight parts and stirred at 45℃ and 500rpm for 25min. Additives are added and stirring is continued for 30min. Curing agent is added and stirred at 300rpm for 10min. Vacuum degassing is then carried out at -0.1MPa for 20min. The resulting product is coated onto the surface of the curtain base fabric and heated at 70℃ for 20min, then heated at 90℃ for 50min. After natural cooling, a high color fastness curtain fabric coating is obtained.

[0041] Comparative Example 1: The difference between this comparative example and Example 1 is that this comparative example does not contain any additives.

[0042] Comparative Example 2 differs from Example 1 in that it does not contain powder.

[0043] Comparative Example 3 differs from Example 1 in that it does not contain fillers.

[0044] Performance testing: Performance tests were conducted on the curtain fabrics treated in Examples 1-3 and Comparative Examples 1-3, and the test data are recorded in the table below: Table 1

[0045] In the performance test, the light fastness was tested according to GB / T8427-2019. The higher the grade, the better the light fastness. The sound insulation performance was tested according to GB / T33620-2017. The higher the sound absorption coefficient at the same frequency, the better the sound insulation performance.

[0046] Among them, the lightfastness and sound insulation performance of the curtain fabrics treated in Comparative Examples 1-3 were lower than those in Examples 1-3, which illustrates the importance of additives. The powder is a porous carbon material formed by carbonizing waste wool. Its structure can scatter and absorb ultraviolet rays through physical means. At the same time, it can be combined with nano-titanium dioxide to further broaden the ultraviolet absorption band and synergistically enhance the shielding effect. On the other hand, the additives in the powder can control the photocatalytic activity of nano-titanium dioxide by coating its surface, so that it can only perform the ultraviolet absorption function without damaging the matrix. In terms of sound insulation performance, the waste wool carbonization in the powder has a microporous structure. After the sound waves enter the pores, they undergo multiple reflections and refractions. At the same time, the polyethylene glycol segments in the additives make the film layer have It has a certain degree of viscoelasticity and consumes sound waves. Therefore, in Comparative Example 2, which lacks powder, the light fastness and sound insulation performance both decreased. The modified chitosan and cellulose nanocrystals in the filler can anchor nano-titanium dioxide and inhibit its aggregation. At the same time, as a rigid reinforcing phase, it increases the reflection path of sound waves inside the film. Therefore, the performance of Comparative Example 3, which lacks filler, also decreased slightly. Comparative Example 1, which does not contain any additives, has a film layer that is only a pure epoxy resin matrix. It is prone to photo-oxidative degradation, resulting in yellowing and embrittlement of the film layer. It also cannot block ultraviolet rays from penetrating the film layer and destroying the dye chromophores in the base fabric. At the same time, the film layer has a limited thickness and lacks internal microstructure, so sound waves can easily penetrate and cannot be dissipated. Therefore, its performance is the lowest.

[0047] By comparing and analyzing the relevant data in the table, it can be seen that the high colorfastness curtain fabric coating treated by the present invention not only has good lightfastness but also excellent sound insulation performance. This indicates that the high colorfastness curtain fabric coating provided by the present invention has a broader market prospect and is more suitable for promotion.

[0048] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0049] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A high colorfastness curtain fabric coating, characterized in that, The raw materials include the following parts by weight: 55-65 parts epoxy resin, 7-8 parts curing agent, 2-3 parts diluent, 8-12 parts additives, and 0.8-1.2 parts antioxidant; The raw materials for the additives include fillers, nano titanium dioxide, powder, anhydrous ethanol, silane coupling agent KH-560, melamine, glucose powder and urea; The raw materials for the filler include chitosan, epichlorohydrin, ethylenediamine, anhydrous ethanol, nano-silica, cellulose nanocrystals, and deionized water; The raw materials for the powder include waste wool, zinc chloride solution, and auxiliaries.

2. The high colorfastness curtain fabric coating according to claim 1, characterized in that, The additive is prepared by the following method: Step 1: Mix the filler, nano titanium dioxide, powder and anhydrous ethanol, stir at 200-300 rpm for 15-25 min, add 8-12% by weight of nano titanium dioxide silane coupling agent KH-560, stir at 300-400 rpm for 30-40 min to obtain the first mixture; Step 2: Mix melamine, glucose and urea, and stir at 70-80℃ and 200-300rpm for 2-3 hours to obtain a second mixture; Step 3: Take the first mixture and the second mixture, mix them at 70-80℃ and 100-200rpm for 2-4 hours, filter to obtain the first filter residue, wash it, and vacuum dry it at 60-80℃ for 8-12 hours to obtain the additive.

3. The high colorfastness curtain fabric coating according to claim 2, characterized in that, The mass ratio of the filler, nano titanium dioxide, powder and anhydrous ethanol is (0.8-1.2):(0.2-0.25):1:(8-12), the mass ratio of melamine, glucose and urea is 1:(1-2):(0.2-0.4), and the mass ratio of the first mixture and the second mixture is 1:(0.6-0.8).

4. The high colorfastness curtain fabric coating according to claim 1, characterized in that, The packing material is prepared by the following method: chitosan, epichlorohydrin and ethylenediamine are mixed in a mass ratio of 1:(1.5-2.5):(1-2), and anhydrous ethanol of 10-15 times the mass of chitosan is added. The mixture is stirred at 50-70℃ and 200-300rpm for 6-10h, filtered, and a second filter residue is obtained. The second filter residue, nano-silica, cellulose nanocrystals and deionized water are mixed in a mass ratio of 1:(2-4):(1-1.2):(10-15), stirred at 40-60℃ and 100-200rpm for 40-50min, filtered, and a third filter residue is obtained. The residue is washed and dried to obtain the packing material.

5. The high colorfastness curtain fabric coating according to claim 1, characterized in that, The powder is prepared by the following method: waste wool is washed and dried, crushed and passed through a 100-mesh sieve to obtain wool powder, the wool powder and zinc chloride solution are mixed at a mass ratio of 1:(2-4), stirred at 100-200 rpm for 12-14 h, filtered, the fourth filter residue is taken, washed and dried, heated to 380-420℃ at 5℃ / min under nitrogen protection, kept at the temperature for 1-3 h, washed and dried to obtain coarse material, additives are added, heated at -0.1MPa and 75-85℃ for 1-2 h, cooled, and crushed through a 200-mesh sieve to obtain powder.

6. The high colorfastness curtain fabric coating according to claim 1, characterized in that, The additive is prepared by the following method: Keratin, maleic anhydride and ammonium persulfate are mixed in a mass ratio of 1:(0.5-0.8):(0.05-0.1), stirred at 200-300 rpm for 20-30 min, acetone of 8-12 times the mass of keratin is added, heated at 60-70℃ for 4-5 h, filtered, and the fifth filter residue is taken. The fifth filter residue, polyethylene glycol, attapulgite and anhydrous ethanol are mixed in a mass ratio of 1:(0.3-0.5):(0.1-0.2):(4-5), sonicated at 40-60℃, 40-60 kHz and 200-300 W for 30-50 min, filtered, and the sixth filter residue is dried to obtain the additive.

7. The high colorfastness curtain fabric coating according to claim 5, characterized in that, The zinc chloride solution has a mass concentration of 30%, and the mass ratio of crude material to additive is 1:(0.8-1.2).

8. The high colorfastness curtain fabric coating according to claim 6, characterized in that, The attapulgite clay was crushed through a 200-300 mesh sieve.

9. The high colorfastness curtain fabric coating according to claim 1, characterized in that, The epoxy resin is epoxy resin E51, the curing agent is T-31 curing agent, the diluent is acetone glycerol, and the antioxidant is antioxidant 1076.

10. The method for preparing a high colorfastness curtain fabric coating according to any one of claims 1-9, characterized in that, Includes the following steps: Mix epoxy resin, diluent, and antioxidant according to weight, and stir at 45℃ and 400-500rpm for 15-25min. Add additives and continue stirring for 20-30min. Add curing agent and stir at 200-300rpm for 5-10min. Then, vacuum degas at -0.1MPa for 15-20min. Coat the obtained product onto the surface of the curtain base fabric, heat at 70℃ for 20min, and then heat at 90℃ for 50min. Allow to cool naturally to obtain a high color fastness curtain fabric coating.

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