Anti-sublimation mucilage as well as preparation method and application thereof

Abstract

The invention relates to the technical field of printing, in particular to anti-sublimation adhesive cement as well as a preparation method and application thereof. The anti-sublimation adhesive cement comprises the following components in parts by weight: 10-20 parts of dynamic shielding microspheres and 65-80 parts of a self-crosslinking acrylic acid-polyurethane copolymer, and the dynamic shielding microspheres expand when heated. The dynamic shielding microspheres expand under a high-temperature condition, so that a tighter barrier structure can be formed, and the anti-sublimation performance is remarkably enhanced; the self-crosslinking acrylic acid-polyurethane copolymer is used as a film-forming material, so that a more compact crosslinking network structure is formed, and the heat resistance and the mechanical property of a coating formed by the anti-sublimation adhesive cement are remarkably improved.

Description

Technical Field

[0001] The invention relates to the technical field of printing, and in particular to an anti-sublimation adhesive and a preparation method and application thereof. Background Art

[0002] Currently, many textile fabrics in the textile industry are dyed with disperse dyes, reactive dyes, etc. During the subsequent printing process or the use of the printed fabrics, the dyes are prone to sublimation or penetration into the printed coating, resulting in yellow spots, black spots or other color spots, affecting the appearance of the printed products.

[0003] In textile printing processing, it is necessary to set an anti-sublimation layer under the printing coating to prevent the dye of the base fabric from affecting the printing coating. Traditional anti-sublimation glue mainly relies on high-density film-forming agents or inorganic fillers to block dye sublimation. For example, the Chinese invention patent with announcement number CN108373725A discloses an anti-sublimation primer, which includes acrylic polymer, activated carbon, dispersant and water, wherein the acrylic polymer is a high-density film-forming agent and the activated carbon is an inorganic filler. However, when the textile is under high temperature, the glue of the anti-sublimation layer is prone to softening, cracking or interface instability, causing the sublimation dye to migrate through tiny channels, affecting the pattern effect of the textile. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an anti-sublimation adhesive having excellent heat resistance and anti-sublimation performance, and a preparation method and application thereof.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: an anti-sublimation mortar, which includes 10 to 20 parts of dynamic shielding microspheres and 65 to 80 parts of self-cross-linking acrylic-polyurethane copolymers by weight, and the dynamic shielding microspheres expand when heated.

[0006] Another technical solution adopted by the present invention is: the preparation method of the above anti-sublimation mortar comprises the following steps: uniformly mixing the dynamic shielding microspheres and the self-crosslinking acrylic acid-polyurethane copolymer, and then adding an auxiliary agent and mixing them uniformly to obtain the anti-sublimation mortar.

[0007] Another technical solution adopted by the present invention is: the application of the above-mentioned anti-sublimation glue comprises the following steps: Step 1: Apply primer on the fabric and form a base layer after drying; Step 2: Mix the anti-sublimation glue with the curing agent and apply it on the base layer to form an anti-sublimation layer after drying; Step 3: Printing a print layer on the anti-sublimation layer.

[0008] The beneficial effects of the present invention are as follows: the anti-sublimation adhesive of the present invention comprises dynamic shielding microspheres and self-crosslinking acrylic acid-polyurethane copolymer. The dynamic shielding microspheres expand under high temperature conditions to form a tighter barrier structure, which significantly enhances the anti-sublimation performance; the self-crosslinking acrylic acid-polyurethane copolymer is used as a film-forming material to form a denser crosslinking network structure, which significantly improves the heat resistance and mechanical properties of the anti-sublimation adhesive after forming a coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the expansion process of the dynamic shielding microspheres in a specific embodiment of the present invention; Figure 2 It is a structural schematic diagram of a printed cloth in Embodiment 5 of the present invention; Figure 3 The effect diagram of the printed fabric in Example 5 of the present invention after the hot pressing anti-sublimation and constant temperature and humidity anti-sublimation tests, wherein a is after the hot pressing anti-sublimation test, b is after the constant temperature and humidity anti-sublimation test, and c is not tested; Figure 4 The effect diagram of the printed cloth in Comparative Example 1 of the present invention after the hot pressing anti-sublimation test and the constant temperature and humidity anti-sublimation test, wherein a is after the hot pressing anti-sublimation test, b is after the constant temperature and humidity anti-sublimation test, and c is not tested; Description of labels: 1. Printing layer; 2. Anti-sublimation layer; 3. Base layer; 4. Base fabric. DETAILED DESCRIPTION

[0010] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0011] Please refer to Figure 1 as well as Figure 2 , an anti-sublimation slurry, comprising 10 to 20 parts of dynamic shielding microspheres and 65 to 80 parts of self-crosslinking acrylic acid-polyurethane copolymer, in parts by weight, wherein the dynamic shielding microspheres expand when heated.

[0012] From the above description, it can be seen that the beneficial effects of the present invention are: the anti-sublimation mortar of the present invention includes dynamic shielding microspheres and self-crosslinking acrylic acid-polyurethane copolymer, and has excellent heat resistance, barrier properties and mechanical strength.

[0013] The dynamic shielding microspheres can expand under high temperature conditions, increase in volume and density, and form a tighter barrier structure, making it more difficult for the dye migration path to penetrate, further blocking the dye sublimation path, thereby significantly enhancing the anti-sublimation performance. Too much dynamic shielding microspheres will cause the formed coating to harden, and reduce flexibility and wear resistance, while too few microspheres may not provide sufficient shielding effect, so the content of dynamic shielding microspheres needs to be controlled. Schematic diagram of the expansion process of dynamic shielding microspheres is shown in Figure 1 .

[0014] The present invention uses a self-crosslinking acrylic acid-polyurethane copolymer as a film-forming material, and introduces self-crosslinking groups, such as hydroxyl groups, carboxyl groups, etc. Under high temperature conditions of TPU hot pressing and other processes in the subsequent process, the self-crosslinking groups in the film-forming material undergo a chemical crosslinking reaction, further enhancing the connection strength between polymers and forming a denser crosslinking network structure, thereby significantly improving the heat resistance and mechanical properties of the coating.

[0015] Furthermore, the invention also includes an auxiliary agent, which includes at least one of nano titanium dioxide, a defoaming agent, a leveling agent and a thickener.

[0016] From the above description, it can be seen that adding nano titanium dioxide can improve the hiding power and enhance the shielding effect.

[0017] Furthermore, the additives include, by weight, 3 to 5 parts of nano titanium dioxide, 0.5 to 1 parts of a defoaming agent, 1 to 2 parts of a leveling agent, and 3 to 5 parts of a thickener.

[0018] Furthermore, the dynamic shielding microspheres expand at 100-150°C with an expansion ratio of 20-40 times.

[0019] From the above description, it can be seen that too high an expansion ratio may cause the coating to crack or over-expand, and a lower ratio cannot provide sufficient isolation effect, so the expansion ratio of the dynamic shielding microspheres is controlled to be 20~40 times.

[0020] Furthermore, the dynamic shielding microspheres include a high temperature resistant epoxy resin shell and a heat sensitive expandable polyacrylate core material.

[0021] From the above description, it can be seen that the expanded core polyacrylate in the microspheres and the polyacrylate of the film-forming material are of the same material, which improves the dispersibility of the microspheres in the film-forming material.

[0022] Another technical solution adopted by the present invention is: the preparation method of the above anti-sublimation mortar comprises the following steps: uniformly mixing the dynamic shielding microspheres and the self-crosslinking acrylic acid-polyurethane copolymer, and then adding an auxiliary agent and mixing them uniformly to obtain the anti-sublimation mortar.

[0023] Further, the preparation of dynamic shielding microspheres includes the following steps: S1: uniformly mixing the polyacrylate emulsion and the bisphenol A epoxy resin, and then adding γ-glycidyloxypropyltrimethoxysilane to mix, to obtain a mixture; S2: adding a curing agent to the mixture to react, and then curing in a dry environment to obtain dynamic shielding microspheres.

[0024] From the above description, it can be known that the addition of γ-glycidyloxypropyltrimethoxysilane can improve the interfacial bonding strength between the epoxy resin and the thermally expandable polyacrylate, and prevent the core material from separating from the shell material under high temperature conditions.

[0025] Furthermore, the mass ratio of the polyacrylate emulsion, the bisphenol A epoxy resin and the γ-glycidyloxypropyltrimethoxysilane is 30-40:60-70:1-3.

[0026] Furthermore, a flexible diluent is added to the bisphenol A epoxy resin and then mixed with the polyacrylate emulsion, and the mass of the flexible diluent is 2-5% of the mass of the bisphenol A epoxy resin.

[0027] From the above description, it can be seen that adding the flexible diluent first can improve the mixing uniformity of the materials.

[0028] Furthermore, the reaction in S2 is specifically: reacting at 55-65° C. for 3.5-4.5 hours.

[0029] Furthermore, the curing in S2 is specifically: curing at 95-105° C. for 1.5-2.5 hours.

[0030] From the above description, it can be seen that in the preparation process, a curing agent is first added to react at a relatively low temperature to form a microsphere shell, and then dried and cured at a relatively high temperature to form microspheres.

[0031] Further, the preparation of the self-crosslinking acrylic acid-polyurethane copolymer comprises the following steps: Sa: Add deionized water and polyether polyol, stir evenly and heat to 55-65°C, then add isocyanate in an inert gas atmosphere for reaction, and obtain a polyurethane prepolymer after cooling; Sb: dissolving methyl acrylate and butyl acrylate in deionized water, adding an emulsifier and stirring evenly, heating to 55-65°C, then adding hydroxyethyl acrylate, hydroxyethyl methacrylate and an initiator for emulsion polymerization to prepare an acrylate emulsion; Sc: Add polyurethane prepolymer to acrylic ester emulsion under stirring condition and self-crosslink for 0.8-1.2h at 35-45°C, and cool to obtain self-crosslinking acrylic-polyurethane copolymer.

[0032] Furthermore, the number average molecular weight of the polyurethane prepolymer is 2000-5000.

[0033] From the above description, it can be seen that the number average molecular weight of the polyurethane prepolymer is 2000-5000, and it has good flexibility and compatibility, which gives the self-crosslinking acrylic-polyurethane copolymer excellent flexibility resistance and adhesion.

[0034] Furthermore, the mass ratio of deionized water, polyether polyol and isocyanate in Sa is 2~3:3~6:2~4.

[0035] Furthermore, the mass ratio of methyl acrylate, butyl acrylate, emulsifier, hydroxyethyl acrylate, hydroxyethyl methacrylate and initiator in Sb is 20~35:10~25:1.5~2:5~10:3~9:1~2.

[0036] Another technical solution adopted by the present invention is: the application of the above-mentioned anti-sublimation glue comprises the following steps: Step 1: Apply primer on the fabric and form a base layer after drying; Step 2: Mix the anti-sublimation glue with the curing agent and apply it on the base layer to form an anti-sublimation layer after drying; Step 3: Printing a print layer on the anti-sublimation layer.

[0037] As can be seen from the above description, the anti-sublimation layer of the present invention has excellent heat resistance, barrier properties and mechanical strength.

[0038] Furthermore, the drying temperature in step 2 is 100°C.

[0039] From the above description, it can be known that the drying temperature of step 2 is 100° C. to achieve the expansion of the dynamic shielding microspheres and the further cross-linking of the self-cross-linking acrylic-polyurethane copolymer.

[0040] Embodiment 1 of the present invention is: an anti-sublimation slurry, which includes, by weight, 10 parts of dynamic shielding microspheres, 80 parts of self-cross-linking acrylic-polyurethane copolymers, 3 parts of nano titanium dioxide, 1 part of defoaming agent, 1 part of leveling agent and 5 parts of thickener; the dynamic shielding microspheres include a high-temperature resistant epoxy resin shell and a heat-sensitive expandable polyacrylate core material, and the dynamic shielding microspheres expand at 100~150°C, with an expansion ratio of 20 times.

[0041] Embodiment 2 of the present invention is: a method for preparing anti-sublimation slurry, the steps are as follows: S1: Preparation of self-crosslinking acrylic acid-polyurethane copolymer: S11: Add 15 kg of deionized water and 15 kg of polyether polyol into a reactor, stir evenly and heat to 55° C., then add 10 kg of isocyanate (HDI) in a nitrogen atmosphere and react for 4 hours. After the reaction is completed, cool to room temperature to obtain a polyurethane prepolymer; S12: 35 kg of methyl acrylate (MMA) and 10 kg of butyl acrylate (BA) were dissolved in 25 kg of deionized water, 2 kg of emulsifier sodium dodecyl sulfate (SDS) was added, the mixture was stirred evenly, and the temperature was raised to 55°C. 9 kg of hydroxyethyl acrylate (HEA), 3 kg of functional monomer hydroxyethyl methacrylate (HEMA) and 1 kg of initiator (APS) were added dropwise to carry out emulsion polymerization to prepare an acrylate emulsion; S13: adding a polyurethane prepolymer to the acrylic ester emulsion under stirring conditions and performing a self-crosslinking reaction at 35° C. for 1.2 hours. After the reaction is completed, cooling to room temperature obtains a self-crosslinking acrylic-polyurethane copolymer.

[0042] S2: Preparation of dynamic shielding microspheres: S21: adding 1.4 kg of flexible diluent epoxy acrylate to 70 kg of bisphenol A epoxy resin, adding 30 kg of polyacrylate emulsion and mixing evenly, and then adding 1 kg of γ-glycidyloxypropyltrimethoxysilane and mixing to obtain a mixture; S22: adding 3 kg of aromatic amine curing agent to the mixture at 55° C. and reacting for 4.5 h, and then curing in a drying oven at 95° C. for 2.5 h to obtain dynamic shielding microspheres; the dynamic shielding microspheres expand at 100-150° C., and the expansion ratio is 40 times; S3: Mix 20kg of micron-sized dynamic shielding microspheres and 65 self-crosslinking acrylic-polyurethane copolymer evenly, then add 5kg of titanium dioxide, 0.5kg of dispersant, 2%kg of defoamer, 5kg of leveling agent and 2.5kg of thickener in sequence, continue to stir evenly, and finally add 10kg of deionized water to adjust the viscosity to obtain anti-sublimation slurry.

[0043] Embodiment 3 of the present invention is: a method for preparing anti-sublimation slurry, the steps are as follows: S1: Preparation of self-crosslinking acrylic acid-polyurethane copolymer: S11: Add 10 kg of deionized water and 21 kg of polyether polyol into a reactor, stir evenly and heat to 65° C., then add 20 kg of isocyanate (HDI) in a nitrogen atmosphere and react for 4 hours. After the reaction is completed, cool to room temperature to obtain a polyurethane prepolymer; S12: 21 kg of methyl acrylate (MMA) and 11 kg of butyl acrylate (BA) were dissolved in 25 kg of deionized water, 2 kg of emulsifier sodium dodecyl sulfate (SDS) was added, the mixture was stirred evenly, and the temperature was raised to 65°C. 5 kg of hydroxyethyl acrylate (HEA), 9 kg of functional monomer hydroxyethyl methacrylate (HEMA) and 2 kg of initiator (APS) were added dropwise to carry out emulsion polymerization to prepare an acrylate emulsion; S13: adding a polyurethane prepolymer to the acrylic ester emulsion under stirring conditions and performing a self-crosslinking reaction at 45° C. for 0.8 h. After the reaction is completed, cooling to room temperature to obtain a self-crosslinking acrylic-polyurethane copolymer.

[0044] S2: Preparation of dynamic shielding microspheres: S21: adding 2.6 kg of flexible diluent epoxy acrylate to 65 kg of bisphenol A epoxy resin, adding 40 kg of polyacrylate emulsion and mixing evenly, and then adding 3 kg of γ-glycidyloxypropyltrimethoxysilane and mixing to obtain a mixture; S22: adding 5 kg of aromatic amine curing agent to the mixture at 65° C. and reacting for 3.5 h, and then curing in a drying oven at 105° C. for 1.5 h to obtain dynamic shielding microspheres; the dynamic shielding microspheres expand at 100-150° C., and the expansion ratio is 20 times; S3: Mix 15kg of micron-sized dynamic shielding microspheres and 60 self-crosslinking acrylic-polyurethane copolymer evenly, then add 3kg of titanium dioxide, 7kg of dispersant, 0.8%kg of defoamer, 1.2kg of leveling agent and 3kg of thickener in sequence, continue to stir evenly, and finally add 10kg of deionized water to adjust the viscosity to obtain anti-sublimation slurry.

[0045] Embodiment 4 of the present invention is: a method for preparing anti-sublimation slurry, the steps are as follows: S1: Preparation of self-crosslinking acrylic acid-polyurethane copolymer: S11: adding 10 kg of deionized water and 25 kg of polyether polyol into a reaction kettle, stirring evenly and heating to 60° C., then adding 15 kg of isocyanate (HDI) in a nitrogen atmosphere and reacting for 4 hours. After the reaction is completed, cooling to room temperature to obtain a polyurethane prepolymer; the number average molecular weight of the polyurethane prepolymer is 3000; S12: 20 kg of methyl acrylate (MMA) and 15 kg of butyl acrylate (BA) were dissolved in 25 kg of deionized water, 1.5 kg of emulsifier sodium dodecyl sulfate (SDS) was added, the mixture was stirred evenly, and the temperature was raised to 60°C. 5 kg of hydroxyethyl acrylate (HEA), 7 kg of functional monomer hydroxyethyl methacrylate (HEMA) and 1.5 kg of initiator (APS) were added dropwise to carry out emulsion polymerization to prepare an acrylate emulsion; S13: adding a polyurethane prepolymer to the acrylic ester emulsion under stirring conditions and performing a self-crosslinking reaction at 40° C. for 1 hour. After the reaction is completed, cooling to room temperature to obtain a self-crosslinking acrylic-polyurethane copolymer.

[0046] S2: Preparation of dynamic shielding microspheres: S21: adding 3 kg of flexible diluent epoxy acrylate to 60 kg of bisphenol A epoxy resin, adding 31 kg of polyacrylate emulsion and mixing evenly, and then adding 2 kg of γ-glycidyloxypropyltrimethoxysilane and mixing to obtain a mixture; S22: adding 4 kg of aromatic amine curing agent to the mixture at 60° C. and reacting for 4 h, and then curing in a drying oven at 100° C. for 2 h to obtain dynamic shielding microspheres; the dynamic shielding microspheres expand at 100-150° C., and the expansion ratio is 30 times; S3: Mix 15kg of micron-sized dynamic shielding microspheres and 60 self-crosslinking acrylic-polyurethane copolymer evenly, then add 3kg of titanium dioxide, 7kg of dispersant, 0.8%kg of defoamer, 1.2kg of leveling agent and 3kg of thickener in sequence, continue to stir evenly, and finally add 10kg of deionized water to adjust the viscosity to obtain anti-sublimation slurry.

[0047] The fifth embodiment of the present invention is: the application of the anti-sublimation glue in the fourth embodiment, the steps are as follows: S1: A water-based primer (Bai Li model: L369) with a thickness of 0.07 mm is screen-printed on a black base fabric 4 dyed with disperse dyes, and then dried at 80°C until the surface is dry to form a base layer 3; S2: 100 kg of anti-sublimation glue was mixed with 4 kg of isocyanate curing agent (manufacturer: Wanhua Chemical, model: WANNATE® HT-100) to obtain a mixed slurry; the mixed slurry was screen-printed on the base layer 3 with a screen printing thickness of 0.17 mm, and dried at 100°C until the surface was dry to form the anti-sublimation layer 2; Step 3: Printing a white printing layer 1 on the anti-sublimation layer 2 with a printing thickness of 0.25 mm, and then drying at 80° C. for 4 minutes until completely dry to obtain a printed cloth; Please refer to the structure of printed fabric Figure 2 , from top to bottom are a printing layer 1, an anti-sublimation layer 2, a base layer 3 and a base fabric 4.

[0048] Comparative Example 1 of the present invention is: The only difference between Comparative Example 1 and Example 5 is that no dynamic shielding microspheres are added to the anti-sublimation adhesive and the printed layer is green.

[0049] The hot pressing anti-sublimation property and constant temperature and humidity anti-sublimation property of the printed fabric obtained in Example 5 and Comparative Example 1 were tested. The test results are shown in Figure 3 and 4 .in Figure 3 The test results of Example 5, a means after the hot pressing anti-sublimation test, b means after the constant temperature and humidity anti-sublimation test, and c means without the test; Figure 4The test results of comparative example 1, a is after the hot pressing anti-sublimation test, b is after the constant temperature and humidity anti-sublimation test, and c is not tested; The test method for hot pressing sublimation resistance is: using a Gellowen G247 ironing / sublimation color fastness tester, setting the temperature to 180°C and the pressure to 4KPa for 60 seconds. During the test, it was found that the printing layer of Example 5 was not dyed by dye sublimation, and the printing layer of Comparative Example 1 showed obvious sublimation contamination of black dye.

[0050] The constant temperature and humidity anti-sublimation property test method is: place the printed cloth in a constant temperature and humidity test machine, set the temperature to 100°C and the relative humidity to 90%, and leave it for 2 days. During the test, it was found that the printed layer of Example 5 was not sublimated by the dye, and the printed layer of Comparative Example 1 was yellowed and blackened, and black dye sublimation occurred.

[0051] In summary, the anti-sublimation slurry provided by the present invention and its preparation method and application have the following advantages: 1. Add thermally expanded dynamic shielding microspheres to the anti-sublimation slurry to form a tight barrier structure to block the sublimation path of the dye.

[0052] By controlling the amount of dynamic shielding microspheres added, the flexibility and anti-sublimation effect of the coating can be balanced. 3. Using self-crosslinking acrylic-polyurethane copolymer as the film-forming material, a dense crosslinking network structure is formed, which significantly improves the heat resistance and mechanical properties of the coating.

[0053] 4. Dynamic shielding microspheres use polyacrylate as the core material and have good dispersion effect in polyacrylate.

[0054] 5. Adding γ-glycidyloxypropyltrimethoxysilane during the preparation of dynamic shielding microspheres can improve the interfacial bonding strength between the shell material epoxy resin and the core material thermal expansion polyacrylate, preventing the separation of the core material and the shell material under high temperature conditions.

[0055] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An anti-sublimation mortar, characterized in that: The invention comprises 10 to 20 parts of dynamic shielding microspheres and 65 to 80 parts of self-crosslinking acrylic acid-polyurethane copolymer in parts by weight, wherein the dynamic shielding microspheres expand when heated.

2. The anti-sublimation glue according to claim 1, characterized in that: The invention also comprises an auxiliary agent, which comprises at least one of nano titanium dioxide, a defoaming agent, a leveling agent and a thickener.

3. The method for preparing the anti-sublimation mortar according to claim 1 or 2, characterized in that: The following steps are involved: The dynamic shielding microspheres and the self-crosslinking acrylic acid-polyurethane copolymer are mixed evenly, and then an auxiliary agent is added and mixed evenly to obtain the anti-sublimation slurry.

4. The method for preparing the anti-sublimation mortar according to claim 3, characterized in that: The preparation of the dynamic shielding microspheres comprises the following steps: S1: uniformly mixing the polyacrylate emulsion and the bisphenol A epoxy resin, and then adding γ-glycidyloxypropyltrimethoxysilane to mix, to obtain a mixture; S2: adding a curing agent to the mixture to react, and then curing in a dry environment to obtain dynamic shielding microspheres.

5. The method for preparing the anti-sublimation mortar according to claim 4, characterized in that: The mass ratio of the polyacrylate emulsion, bisphenol A epoxy resin and γ-glycidyloxypropyltrimethoxysilane is 30-40:60-70:1-3.

6. The method for preparing the anti-sublimation mortar according to claim 4, characterized in that: The reaction in S2 is specifically: reacting at 55-65° C. for 3.5-4.5 hours.

7. The method for preparing the anti-sublimation mortar according to claim 3, characterized in that: The preparation of the self-crosslinking acrylic acid-polyurethane copolymer comprises the following steps: Sa: Add deionized water and polyether polyol, stir evenly and heat to 55-65°C, then add isocyanate in an inert gas atmosphere for reaction, and obtain a polyurethane prepolymer after cooling; Sb: dissolving methyl acrylate and butyl acrylate in deionized water, adding an emulsifier and stirring evenly, heating to 55-65°C, then adding hydroxyethyl acrylate, hydroxyethyl methacrylate and an initiator for emulsion polymerization to prepare an acrylate emulsion; Sc: Add polyurethane prepolymer to acrylic ester emulsion under stirring condition and self-crosslink for 0.8-1.2h at 35-45°C, and cool to obtain self-crosslinking acrylic-polyurethane copolymer.

8. The method for preparing the anti-sublimation mortar according to claim 7, characterized in that: The mass ratio of deionized water, polyether polyol and isocyanate in Sa is 2-3:3-6:2-4.

9. The method for preparing the anti-sublimation mortar according to claim 7, characterized in that: The mass ratio of methyl acrylate, butyl acrylate, emulsifier, hydroxyethyl acrylate, hydroxyethyl methacrylate and initiator in the Sb is 20-35:10-25:1.5-2:5-10:3-9:1-2.

10. The use of the anti-sublimation glue according to any one of claims 1 or 2, characterized in that: The following steps are involved: Step 1: Apply primer on the fabric and form a base layer after drying; Step 2: Mix the anti-sublimation glue with the curing agent and apply it on the base layer to form an anti-sublimation layer after drying; Step 3: Printing a print layer on the anti-sublimation layer.

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