UV holographic texture transfer printing adhesive for automotive interior membrane and preparation method of UV holographic texture transfer printing adhesive

Abstract

The invention relates to a UV holographic texture transfer printing adhesive for an automobile interior film and a preparation method, the UV holographic texture transfer printing adhesive for the automobile interior film comprises the following components in percentage by mass: 20%-50% of a prepolymer, 10%-40% of a UV active monomer, 5%-20% of a thermoplastic regulator, 2%-6% of a photoinitiator, 5%-30% of a solvent, 0.2%-1% of a release agent, 0.05%-0.5% of an ultraviolet light absorber and 0.1%-0.5% of an antioxidant, the UV active monomer is a monofunctional acrylate monomer, a bifunctional acrylate monomer or a mixture of monofunctional / bifunctional acrylate monomers. The UV holographic texture transfer printing adhesive for the automotive interior membrane, prepared by the invention, has the advantages of strong surface adhesion, low curing energy, high transparency of a cured membrane, strong thermoplasticity, capability of maintaining continuous texture under a high-temperature forming process and the like, and also has excellent weather resistance and aging resistance; the film is matched with functional layers such as a protective layer, a coating layer and an ink layer to be applied to an IML or INS process of an automotive trim film, and rich and diversified decoration effects can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of UV transfer adhesive materials, and in particular to a UV holographic texture transfer adhesive for an automobile interior decoration film and a preparation method thereof. Background Art

[0002] With the development of the automobile industry, the technology of film decoration has also improved, and automotive interior films with different decorative effects and structural designs have emerged. Among them, holographic texture decoration effects are widely used in the automotive field due to their bright colors, high saturation, clean and environmentally friendly, never fading, color controllable, and polarization adjustable advantages.

[0003] Holographic texture effects are usually reproduced using UV embossing technology. Unlike holographic anti-counterfeiting transfer films used in traditional packaging, holographic texture decorative films used in automotive interiors usually need to be made into parts through IML (in-mold molding) or INS (insert molding) processes with high-stretch molding technology, which places higher requirements on material properties.

[0004] The common UV embossing holographic varnish products on the market do not have thermoforming stretch properties. Their high cross-linking density determines their insufficient thermoforming stretchability. Even if a flexible segment structure is added to the formula to toughen and improve the room temperature tensile properties of the material, the texture layer will soften and shrink excessively during high-temperature thermoforming stretching due to insufficient heat resistance of the material, and the low intermolecular interaction makes it difficult to adhere to the surface of the substrate for uniform stretching, resulting in defects such as separation of the texture layer from the substrate and surface cracking after high-temperature and high-pressure molding. Summary of the invention

[0005] In view of the existing technical problems, the present invention provides a UV holographic texture transfer adhesive for automobile interior film that can meet the high-stretching molding of IML or INS process and a preparation method thereof, so as to solve the problems of weak adhesion of stretchable holographic texture transfer materials for automobile interior in the prior art to the substrate, insufficient hot stretching molding performance, poor high temperature aging resistance, etc.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A UV holographic texture transfer adhesive for automobile interior film comprises the following components in percentage by mass: 20% to 50% prepolymer, 10% to 40% UV active monomer, 5% to 20% thermoplastic regulator, 2% to 6% photoinitiator, 5% to 30% solvent, 0.2% to 1% release agent, 0.05% to 0.5% ultraviolet absorber, and 0.1% to 0.5% antioxidant, wherein the prepolymer is a UV light-curing resin, and the UV active monomer is a monofunctional acrylate monomer, a difunctional acrylate monomer, or a mixture of monofunctional / difunctional acrylate monomers.

[0007] In some technical solutions, optionally, the UV light-curable resin is a light-curable resin including a difunctional group or a trifunctional group, and is at least one of aliphatic polyurethane acrylate, alicyclic polyurethane acrylate, polyester acrylate, and modified epoxy acrylate.

[0008] In some technical solutions, optionally, in the mixture, the mass proportion of components with a glass transition temperature greater than 60° C. is greater than or equal to 50%.

[0009] In some technical schemes, optionally, the monofunctional acrylate monomer includes at least one of methyl methacrylate, tert-butyl methacrylate, isobornyl acrylate, isobornyl methacrylate, TMCHMA, dicyclopentadiene acrylate, CTFA, cyclohexyl methacrylate, N-acryloylmorpholine, N, N-dimethylacrylamide, N, N-diethylacrylamide, and hydroxymethylacrylamide; the difunctional acrylate monomer includes at least one of 1,6-hexanediol diacrylate, DPGDA, NPGDA, tripropylene glycol diacrylate, and tricyclodecane dimethanol diacrylate.

[0010] In some technical solutions, optionally, the thermoplastic regulator is one or two of SMA resin, modified SMA resin, acrylate homopolymer or copolymer, and SAN resin.

[0011] In some technical solutions, optionally, the photoinitiator includes at least two of photoinitiator 184, photoinitiator 2959, photoinitiator MBF, photoinitiator 754, photoinitiator TPO, photoinitiator TPO-L and ESACURE 1187.

[0012] In some technical solutions, optionally, the release agent is an organic silicon release agent including double bonds or silicon-hydrogen bond reactive groups.

[0013] In some technical solutions, optionally, the silicone-based release agent includes at least one of acryloxytriisopropylsilane, vinyl VMQ silicone resin, (mercapto)methylsiloxane-dimethylsiloxane copolymer, and methacryloxypropylmethyldiethoxysilane.

[0014] In some technical schemes, optionally, the solvent includes at least one of ethyl acetate, acetone, butanone, propyl acetate and butyl acetate; the ultraviolet absorber includes at least two of TINUVIN 1130, UV-312, UV144 and TINUVIN 292; the antioxidant includes at least one of p-hydroxyanisole, triphenyl phosphite, antioxidant 1010, antioxidant 168 and antioxidant 626.

[0015] On the basis of the above technical solution, the present invention also provides a method for preparing UV holographic texture transfer adhesive for automobile interior film, comprising the following steps: UV active monomers, thermoplastic regulators, photoinitiators, release agents, ultraviolet absorbers, antioxidants and solvents are added into a stirring kettle, heated and stirred at 50°C to 60°C until the solid components are dissolved, and then a prepolymer is added, stirred evenly and filtered, and allowed to stand for defoaming to obtain the UV holographic texture transfer adhesive for automotive interior film, wherein the prepolymer is a UV light-curing resin, and the UV active monomer is a mixture of a monofunctional acrylate monomer and a difunctional acrylate monomer.

[0016] Compared with the prior art, the UV holographic texture transfer adhesive for automobile interior film and the preparation method provided by the present invention have the following advantages: (1) The present invention uses a UV light-curing resin with good weather resistance, low functionality and high glass transition temperature and a UV active monomer compound, so that the texture adhesive has good toughness after curing, is easy to demould, has no anti-stickiness on the surface, is suitable for UV embossing process, and has good high-temperature plasticity. It has a certain mechanical strength and flexibility at the thermoforming temperature to maintain the continuity of the structure and texture, avoiding surface defects such as shrinkage of the texture layer, tensile orientation rupture, and peeling from the substrate caused by excessive softening at high temperature.

[0017] (2) The present invention increases the entanglement and interaction between molecular chains by introducing a thermoplastic regulator, and releases the stress during the hot stretching molding process. The holographic texture transfer adhesive has good high-temperature adhesion to the substrate. After 100% deformation of the vacuum forming and high-pressure molding, the texture layer does not show surface defects such as whitening and cracking.

[0018] (3) The preparation method of the present invention is simple. By selecting and matching the formula and controlling the conditions, the obtained UV holographic texture transfer adhesive has excellent performance. It can be applied to the IML or INS process of automotive interior film to form a rich and diverse decorative effect. It is easy to promote and has a good market prospect. DETAILED DESCRIPTION The principles and features of the present invention are described below in conjunction with specific embodiments, and the examples given are only used to explain the present invention and are not intended to limit the scope of the present invention. Unless otherwise defined, all technical and scientific terms used herein belong to the meanings commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0019] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention can be combined with each other. The meanings of the terms "comprise", "include", "contain", and "have" are non-restrictive, that is, other steps and other components that do not affect the results can be added.

[0020] When the UV transfer adhesive material system uses low-functionality resin and low-functionality active diluent as the cross-linked resin matrix, the transfer adhesive coating formed by curing has a low hardness and its surface is easily scratched and worn. When high-functionality UV resin and high-functionality active diluent monomer are used, although the hardness and wear resistance of the transfer adhesive coating can be improved, the high degree of cross-linking makes the transfer adhesive shrink larger during curing, which easily causes the transfer adhesive coating to warp and deform and crack at high and low temperatures.

[0021] To solve the above problems, the embodiment of the present invention provides a UV holographic texture transfer adhesive for automotive interior film, which includes the following components in mass percentage: 20% to 50% prepolymer, 10% to 40% UV active monomer, 5% to 25% thermoplastic regulator, 2% to 6% photoinitiator, 5% to 30% solvent, 0.2% to 1% release agent, 0.05% to 0.5% ultraviolet absorber, and 0.1% to 0.5% antioxidant. The prepolymer is a UV light-curable resin, and the UV active monomer is a mixture of low-functional (monofunctional or difunctional) acrylate monomers. That is, the UV active monomer can be a monofunctional acrylate monomer, a difunctional acrylate monomer, or a mixture of a monofunctional acrylate monomer and a difunctional acrylate monomer.

[0022] Therefore, the UV holographic texture transfer adhesive provided by the present application uses a UV light-curing resin and a UV active monomer with a high glass transition temperature Tg and low shrinkage. The UV active monomer also has high reactivity. After being added to the formula, on the one hand, the cross-linking density of the texture adhesive is reduced, the tensile properties are improved, and the double bond conversion rate is also improved. The reduction of residual double bonds also helps to improve the material's resistance to ultraviolet aging and heat aging. On the other hand, the prepolymer with a high glass transition temperature and molecular weight improves the mechanical properties of the cured film while reducing the curing shrinkage. In addition, the combination of the low-shrinkage UV active monomer and the solvent in the present invention can form a good erosion, swelling and biting effect on the plastic substrate, so that the transfer adhesive can be firmly combined with substrates such as PET, PC, PMMA, etc. after curing, and has excellent adhesion and water boiling resistance.

[0023] Preferably, the prepolymer is a bifunctional or trifunctional photocurable resin with a high glass transition temperature or good heat resistance, and may include at least one of aliphatic polyurethane acrylate, alicyclic polyurethane acrylate, polyester acrylate, and modified epoxy acrylate. Further, the prepolymer is at least one of Sartomer CN983NS, CN981NS, CN985BBB, CN989NS, CN1964US NS, CU248NS, CN7001NS, CN228NS, Lankelu L-6280, Lankelu L-6131, Haoyi HYR-2061, Custer U9301, Custer U9576, Wuxing W2952, and Wuxing LED9800C. It has the performance characteristics of fast curing speed, good surface drying, good toughness, good heat resistance, and good adhesion.

[0024] Furthermore, the UV active monomer is a mixture of low-functional (monofunctional or difunctional) acrylate monomers, wherein in the mixture, the mass proportion of the component with a glass transition temperature greater than 60° C. (i.e., the high glass transition temperature component) is greater than or equal to 50%, preferably greater than 60%.

[0025] High-stretch holographic texture UV transfer adhesive uses high Tg, low shrinkage UV prepolymers and active monomers. The UV active monomers also have high reactivity. After being added to the formula, they reduce the cross-linking density of the texture adhesive, improve the tensile properties, and also increase the double bond conversion rate. The reduction of residual double bonds also helps to improve the material's resistance to UV aging and thermal aging.

[0026] Among them, the monofunctional acrylate monomers include methyl methacrylate (homopolymer Tg = 105°C), tert-butyl methacrylate (Tg = 105°C), isobornyl acrylate (Tg = 88-100°C), isobornyl methacrylate (Tg = 110°C), cyclohexyl methacrylate (Tg = 66°C), TMCHMA (Tg = 145°C), THFA (Tg = 100°C), CTFA (Tg = 62°C), dicyclopentadiene acrylate (Tg = 110°C), N-acryloylmorpholine (Tg = 145°C). ), N, N-dimethylacrylamide (Tg=120℃), DPGDA (Tg=104℃), NPGDA (Tg=107℃), hydroxymethyl acrylamide (Tg=153℃); the difunctional acrylate monomer includes at least one of 1,6-hexanediol diacrylate (HDDA) (Tg=43℃), tripropylene glycol diacrylate (TPGDA) (Tg=62℃), dicyclopentenyl acrylate (Tg=120℃) and tricyclodecane dimethanol diacrylate (Tg=180℃).

[0027] It is understandable that the glass transition temperature Tg of a homopolymer can generally be used to measure the rigidity of a monomer structure and the heat resistance of a polymer. In the present application, the rigidity of the polymer and the monomer structure is one of the key factors of concern. The UV-active monomer combination protected in the present application has a rigid structure monomer component with a high Tg whose mass ratio is above 50%, which can achieve better heat resistance and thus maintain the continuity and integrity of the texture during thermoforming and stretching. The specific monomer combinations can be varied and will not be described one by one here.

[0028] The formula provided in the present application also adds a thermoplastic regulator. The use of high molecular weight UV light-curing resin and thermoplastic regulating resin can increase the entanglement and interaction between molecular chains, enhance the adhesion between the texture layer and the substrate, and improve the thermoforming tensile properties of the texture glue. The thermoplastic regulator of the present invention is preferably a material with a molecular weight of 5000 to 100000, which can be one or two of styrene-maleic anhydride copolymer (SMA resin), modified SMA resin, styrene-acrylonitrile copolymer (SAN resin) and thermoplastic acrylate homopolymer or copolymer.

[0029] Among them, the thermoplastic acrylate homopolymer or copolymer is preferably one or more of NeoCryl B-811, NeoCryl B-838, NeoCryl B-801, NeoCryl B-734, NeoCryl B-805, NeoCryl B-728, Shimei BA-533, Shimei BA522-R. The SMA resin is preferably one or more of Sartomer or Crayville SMA-2000, SMA-3000, SMA-17352, SMA-2021. Therefore, the use of thermoplastic regulating resin with high light transmittance and high glass transition temperature (>60°C) not only improves the heat resistance of the texture glue, but also improves the high temperature plasticity of the material without affecting its transparency.

[0030] In addition, in the present application, the photoinitiator includes at least two of the following: photoinitiator 184 (1-hydroxycyclohexyl phenyl ketone), photoinitiator 2959 (2-hydroxy-4'-(2-hydroxyethoxy)-2-methylpropiophenone), MBF (methyl benzoylformate), photoinitiator 754, TPO (2,4,6-trimethylbenzoyl-diphenylphosphine oxide), and TPO-L (ethyl 2,4,6-trimethylbenzoylphenylphosphonate). By adopting a combination of highly efficient and non-yellowing ultraviolet photoinitiators to initiate the UV polymerization reaction of the unsaturated prepolymer system, a small amount of initiators such as acylphosphine oxide photoinitiators (≤1%) is added to enable the UV holographic texture transfer adhesive to achieve low-energy shallow and deep curing within a few seconds, while satisfying the mercury lamp and LED lamp curing methods to improve production efficiency, and the control of the amount of initiator also avoids the decline of the material's resistance to light and heat aging.

[0031] The release agent is a silicone-based reactive release agent, which contains a reactive group, and the reactive group includes a double bond and / or a silicon-hydrogen bond. Preferably, the release agent includes at least one of acryloxy triisopropyl silane, vinyl VMQ silicone resin, ChangFu® MS-SH ((mercapto) methyl siloxane-dimethyl siloxane copolymer), and methacryloxy propyl methyl diethoxy silane. The release agent can reduce the bonding force between the material and the metal nickel plate after curing, so that the holographic texture transfer is clear and damage-free. At the same time, it helps to improve the heat resistance, water repellency, aging resistance and other properties of the texture glue.

[0032] Further, the solvent includes at least one of ethyl acetate, acetone, butanone, propyl acetate and butyl acetate.

[0033] Further, the UV absorber includes at least two of TINUVIN 1130, UV-312, UV144 and TINUVIN 292. The UV absorber is a light stabilizer, and its high temperature resistance and extraction resistance make it particularly suitable for industrial and automotive fields. Due to its wide range of UV absorption capabilities, it can also provide effective protection for photosensitive substrates such as plastics, and extend the service life of the coating by minimizing gloss loss and cracking.

[0034] In the formula, the antioxidant includes at least one of p-hydroxyanisole MEHQ, antioxidant 1010, antioxidant 168, triphenyl phosphite and antioxidant 626. The selected antioxidant has high thermal stability and good antioxidant performance, which can effectively extend the service life of the material and improve the discoloration resistance of the polymer material under high temperature processing conditions.

[0035] Another embodiment of the present invention provides a method for preparing a UV holographic texture transfer adhesive for an automobile interior film, comprising the following steps: Add active monomer, thermoplastic regulator, ultraviolet absorber, antioxidant, solvent and photoinitiator into a stirring kettle, stir evenly, add UV prepolymer after complete dissolution, stir evenly and filter, let stand to defoam, and obtain UV holographic texture transfer adhesive for automotive interior film.

[0036] Therefore, the preparation method provided by the embodiment of the present invention is simple. By selecting and matching the formula and controlling the conditions, the obtained UV holographic texture transfer adhesive has excellent performance and is applied to the IML or INS process of the automotive interior film to form a rich and diverse decorative effect. It is easy to promote and has a good market prospect.

[0037] The present invention will be further described below in conjunction with specific examples. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. The experimental methods for which specific conditions are not specified in the following examples are usually based on the conditions recommended by the manufacturer. Unless otherwise stated, percentages and parts are calculated by mass.

[0038] Example 1 This embodiment provides a method for preparing a UV holographic texture transfer adhesive for an automobile interior film, and the specific steps are as follows: The thermoplastic regulator, active monomer, ultraviolet absorber, antioxidant, solvent and photoinitiator of the formula shown in Table 1 are added to a stirring kettle, and stirred evenly at a heating temperature of 50°C to 60°C and a speed of 400r / min to 600r / min. After the resin and powder material are completely dissolved, the UV prepolymer is added and stirred evenly, and then filtered with a 100-mesh filter. After standing and defoaming, the UV holographic texture transfer adhesive for the automotive interior film is obtained.

[0039] Table 1 Preparation formula of Example 1

[0040] Example 2 The difference between this embodiment and embodiment 1 is that the formula shown in Table 2 is adopted, and the remaining steps and parameters are the same as those in embodiment 1.

[0041] Table 2 Preparation formula of Example 2

[0042] Example 3 The difference between this embodiment and embodiment 1 is that the formula shown in Table 3 is adopted, and the remaining steps and parameters are the same as those in embodiment 1.

[0043] Table 3 Preparation formula of Example 3

[0044] Comparative Example 1 The difference between this embodiment and embodiment 1 is that no thermoplasticity regulator is used in the formula, the feed ratio of other materials is the same as that of embodiment 1, and the preparation steps and parameters are the same as those of embodiment 1.

[0045] Comparative Example 2 The difference between this embodiment and embodiment 1 is that the UV active monomers in the formula are all replaced by tripropylene glycol diacrylate, the solvent is all replaced by acetone, the feed ratios of other materials are the same as those in embodiment 1, and the preparation steps and parameters are the same as those in embodiment 1.

[0046] Comparative Example 3 The difference between this embodiment and embodiment 1 is that no solvent is used in the formula, the feed ratio of other materials is the same as that of embodiment 1, and the other steps and parameters are the same as those of embodiment 1.

[0047] To further illustrate the excellent effect of the present invention, the following performance tests were performed on the UV holographic texture transfer adhesive for automobile interior film prepared in Examples 1-3 and Comparative Examples 1-3, commercial UV transfer adhesive Shanghai 2007X4 (Tg=114°C), and commercial UV transfer adhesive Shantou Changrong Environmental Protection CR-2006. The results are shown in Table 4.

[0048] UV embossing test: With 250μm PC film as substrate and holographic nickel plate as template, a self-made LED-UV embossing machine was used to perform low-energy UV (UVA energy 200nw / cm 2 )UV embossing, the thickness of the texture glue layer is 4 to 10μm, observe whether the texture glue is dry and the demoulding performance.

[0049] Adhesion test: refer to the method in GB / T9286 for determination, use a 1mm grid knife to test the adhesion between the texture glue and the substrate, and the adhesion is passed if it reaches 4B or above.

[0050] Water boiling resistance test: immerse the cured holographic texture film in boiling water for 2 hours, then take it out and wipe off the water stains on the surface. Use a 1mm grid knife to test the adhesion between the texture glue and the substrate. The adhesion reaches 4B or above to pass the test.

[0051] Coating test: UV emboss holographic texture on PC substrate, and coat the fully cured textured adhesive film by magnetron sputtering or vacuum evaporation. After coating, observe whether the coating has dull, unclear, flowery texture, or weak adhesion.

[0052] High-pressure forming test: Use a specific mold (stretching rate of about 100%) to perform high-pressure forming or vacuum forming on the holographic texture film coated with ink, and test whether the high-stretching corners are cracked after forming and whether the holographic texture remains continuous. If there is no abnormality, it means the test has passed.

[0053] High temperature aging test: Place the formed film in a blast oven at 105℃ for 500h, take it out and observe whether there are cracks on the edges and corners, and whether there is delamination between the film layers. If there is no delamination, it means that the high temperature aging test has passed.

[0054] Table 4 Performance test results comparison table

[0055] As can be seen from Table 4, after the thermoplastic regulator is removed from the formula of Comparative Example 1, the tensile properties of the material decrease. In Comparative Example 2, no specific solvent and active monomer combination is used, resulting in a significant decrease in the adhesion between the texture glue and the substrate, and both the demolding and tensile properties are affected. In Comparative Example 3, no specific solvent is used, resulting in a significant deterioration in the demolding effect and adhesion of the texture glue. In addition, compared with some commercial UV holographic texture transfer materials, it can be seen that the UV holographic texture transfer glue for automotive interior film prepared by the present invention can maintain a high Tg at room temperature after UV embossing curing, and is resistant to wiping with solvents such as alcohol and propyl acetate without re-sticking. It is suitable for low-energy UV embossing technology, has good plating properties and high temperature aging resistance, and has good plasticity during thermoforming processing. It is not easy to turn white or crack after being formed by IML or INS process.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A UV holographic texture transfer adhesive for automotive interior film, characterized in that: The invention comprises the following components in percentage by mass: 20% to 50% prepolymer, 10% to 40% UV active monomer, 5% to 20% thermoplastic regulator, 2% to 6% photoinitiator, 5% to 30% solvent, 0.2% to 1% release agent, 0.05% to 0.5% ultraviolet absorber and 0.1% to 0.5% antioxidant, wherein the prepolymer is a UV light-curing resin and the UV active monomer is a monofunctional acrylate monomer, a difunctional acrylate monomer or a mixture of monofunctional / difunctional acrylate monomers.

2. The UV holographic texture transfer adhesive for automobile interior film according to claim 1, characterized in that: The UV light-curable resin is a light-curable resin including a bifunctional group or a trifunctional group, and is at least one of aliphatic polyurethane acrylate, alicyclic polyurethane acrylate, polyester acrylate, and modified epoxy acrylate.

3. The UV holographic texture transfer adhesive for automobile interior film according to claim 1, characterized in that: Among the UV active monomers, the mass proportion of the component with a glass transition temperature greater than 60° C. is greater than or equal to 50%.

4. The UV holographic texture transfer adhesive for automobile interior film according to any one of claims 1 to 3, characterized in that: The monofunctional acrylate monomer includes at least one of methyl methacrylate, tert-butyl methacrylate, isobornyl acrylate, isobornyl methacrylate, TMCHMA, dicyclopentadiene acrylate, CTFA, cyclohexyl methacrylate, N-acryloylmorpholine, N,N-dimethylacrylamide, N,N-diethylacrylamide, and hydroxymethylacrylamide; The difunctional acrylate monomer includes at least one of 1,6-hexanediol diacrylate, DPGDA, NPGDA, tripropylene glycol diacrylate and tricyclodecane dimethanol diacrylate.

5. The UV holographic texture transfer adhesive for automobile interior film according to claim 1, characterized in that: The thermoplasticity regulator is one or two of SMA resin, modified SMA resin, acrylate homopolymer or copolymer, and SAN resin.

6. The UV holographic texture transfer adhesive for automobile interior film according to claim 5, characterized in that: The photoinitiator includes at least two of the photoinitiator 184, the photoinitiator 2959, the photoinitiator MBF, the photoinitiator 754, the photoinitiator TPO, and the photoinitiator TPO-L.

7. The UV holographic texture transfer adhesive for automobile interior film according to claim 1, characterized in that: The release agent is an organic silicon release agent including double bonds and / or silicon-hydrogen bond reactive groups.

8. The UV holographic texture transfer adhesive for automobile interior film according to claim 7, characterized in that: The silicone-based release agent includes at least one of acryloxy triisopropyl silane, vinyl VMQ silicone resin, (mercapto) methyl siloxane-dimethyl siloxane copolymer, and methacryloxy propyl methyl diethoxy silane.

9. The UV holographic texture transfer adhesive for automobile interior film according to claim 1, characterized in that: The solvent comprises at least one of ethyl acetate, acetone, butanone, propyl acetate and butyl acetate; The ultraviolet absorber includes at least two of TINUVIN 1130, UC-2300, UV-312, UV144 and TINUVIN 292; The antioxidant includes at least one of p-hydroxyanisole, triphenyl phosphite, antioxidant 1010 , antioxidant 168 and antioxidant 626 .

10. A method for preparing the UV holographic texture transfer adhesive for automobile interior film according to any one of claims 1 to 9, characterized in that: The following steps are involved: UV active monomers, thermoplastic regulators, photoinitiators, release agents, ultraviolet absorbers, antioxidants and solvents are added into a stirring kettle, heated and stirred at 50°C to 60°C until the solid components are dissolved, and then a prepolymer is added, stirred evenly and filtered, and allowed to stand for defoaming to obtain the UV holographic texture transfer adhesive for automotive interior film, wherein the prepolymer is a UV light-curing resin, and the UV active monomer is a monofunctional acrylate monomer, a difunctional acrylate monomer or a mixture of monofunctional / difunctional acrylate monomers.

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