High-temperature oil resistant acrylic adhesive and preparation method thereof

Abstract

The invention discloses a high-temperature oil resistant acrylic adhesive and a preparation method thereof, and belongs to the technical field of polymer adhesives. The preparation method comprises the following steps: adding a hard monomer, a soft monomer, a functional monomer, a photoinitiator and a chain transfer agent into an organic solvent, introducing nitrogen, uniformly stirring, and reacting under UV illumination to obtain a UV copolymer, the conversion rate of the UV copolymer is 5-20%, and the molecular weight range is 6000-30w; the preparation method comprises the following steps: adding the UV copolymer, the soft monomer, the functional monomer and the chain transfer agent into the organic solvent, heating, reacting, preserving heat, adding the thermal initiator, preserving heat, cooling and discharging to obtain the adhesive. According to the invention, the UV polymer and the solution are polymerized and reacted together, so that the compatibility of the glue and a polymer with certain regularity is improved, the conversion rate of the glue is improved, the oil resistance of the glue is improved through UV polymerization and solution thermal polymerization reaction, and the flexibility and temperature resistance of a glue film are improved.

Description

Technical Field

[0001] This invention belongs to the field of polymer adhesive technology, specifically relating to a high-temperature resistant oil-based acrylic adhesive and its preparation method. Background Technology

[0002] Acrylic adhesives are copolymerized from acrylate monomers, with a saturated carbon main chain and polar ester side groups. Therefore, they possess excellent heat resistance, aging resistance, and UV resistance. However, acrylic adhesives are somewhat lacking in high-temperature oil resistance. Incorporating epoxy resin, fluororubber, and nitrile rubber into acrylic adhesives can improve their high-temperature oil resistance; however, epoxy resin tends to be brittle after curing, fluororubber contains fluorine, which is regulated in some regions, and nitrile rubber has poor temperature resistance and poor compatibility with acrylic adhesives, leading to whitening of the adhesive film during physical mixing. Therefore, neither the heat resistance nor the oil resistance requirements can be met simultaneously.

[0003] Therefore, it is of great significance to research and develop a high-temperature resistant acrylic adhesive. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method for preparing a high-temperature resistant oil-acrylic adhesive. This method uses UV polymer and solution polymerization to react together, which improves the compatibility of the adhesive with polymers of a certain regularity and improves the conversion rate of the adhesive. Another technical problem to be solved by the present invention is to provide a high-temperature resistant oil-acrylic adhesive with excellent oil resistance and improved film flexibility and temperature resistance.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0006] A method for preparing a high-temperature resistant oil-acrylic adhesive includes the following steps:

[0007] 1) Hard monomers, soft monomers, functional monomers, photoinitiators, and chain transfer agents are added to an organic solvent, nitrogen gas is introduced and stirred until homogeneous, and the reaction is carried out under UV light to obtain a UV copolymer; wherein the conversion rate of the UV copolymer is 5-20%, and the molecular weight Mw ranges from 60 million to 300,000.

[0008] 2) The UV copolymer, soft monomer, functional monomer and chain transfer agent obtained in step 1) are added to an organic solvent, heated and kept at a certain temperature, then a thermal initiator is added, kept at a certain temperature, cooled and discharged to obtain an adhesive.

[0009] Furthermore, the hard monomer is selected from one or more of acrylonitrile, styrene, isobornyl acrylate, isobornyl methacrylate, and methyl methacrylate; the soft monomer is selected from one or more of ethyl acrylate, butyl acrylate, methoxyethyl acrylate, isooctyl acrylate, lauryl acrylate, and dodecyl acrylate.

[0010] Furthermore, the functional monomer is selected from one or more of acrylic acid, methacrylic acid, acrylamide, N-hydroxymethylacrylamide, diacetone acrylamide, hydroxyethyl acrylate, glycidyl acrylate, itaconic acid, maleic acid, maleic anhydride, and nadic anhydride.

[0011] Furthermore, the photoinitiator is selected from one or more of 1-hydroxycyclohexylphenyl ketone, 2-hydroxy-2-methylphenylpropanone, and trimethylbenzoyl-diphenylphosphine oxide; the organic solvent is selected from one or more of N,N-dimethylformamide, N,N-dimethylacetamide, ethyl acetate, butyl acetate, toluene, and cyclohexane.

[0012] Further, the chain transfer agent is selected from one or more of tert-dodecyl mercaptan, mercaptoacetic acid, thiophenol, n-butyl mercaptan, and 2,4-diphenyl-4-methyl-1-pentene; the thermal initiator is selected from one or more of benzoyl peroxide, azobisisobutyronitrile, azobisisoheptanenitrile, dimethyl azobisisobutyrate, and azoisobutylcyanoformamide.

[0013] Further, in step 1), by weight: 20-50 parts hard monomer, 20-40 parts soft monomer, 0.1-0.5 parts functional monomer, 0.1-0.3 parts photoinitiator, 0.1-0.5 parts chain transfer agent, 50-100 parts organic solvent; UV irradiation reaction time is 10-30 min.

[0014] Further, in step 2), by weight: 10-30 parts UV polymer, 40-60 parts soft monomer, 5-10 parts functional monomer, 0.1-1 part thermal initiator, 0.1-0.5 parts chain transfer agent, and 50-100 parts solvent; the reaction temperature is 50-120℃.

[0015] Furthermore, the high-temperature resistant oil-acrylic adhesive prepared by the aforementioned method is a high-temperature resistant oil-acrylic adhesive.

[0016] Furthermore, the application of the high-temperature resistant oil-acrylic adhesive in the preparation of adhesive films.

[0017] Further, the adhesive, curing agent, and leveling agent are added to an organic solvent and stirred evenly. The mixture is then coated onto a release film, dried, and cured to obtain an adhesive film. The curing agent is selected from one or more of 2-ethyl-4-methylimidazole, 2-methylimidazole, m-phenylenediamine, toluene dimethylamine, sulfanilic acid, 4,4-diaminodiphenylmethane, phthalic anhydride, 4,4-diaminocyclohexanemethane, PM200, and HT100. The leveling agent is selected from one or more of BYK-333, BYK-306, BYK-310, KH550, KH560, and MP2000.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] (1) The present invention uses UV polymerization to synthesize a flexible polymer with controllable molecular weight and controllable viscosity.

[0020] (2) The present invention uses a UV polymer mixture containing a certain mass fraction of small molecule monomers as a crosslinker to react with solution polymerization, which improves the compatibility of the glue with a certain degree of regularity, avoids the occurrence of glue turbidity, and improves the glue conversion rate.

[0021] (3) The present invention improves the oil resistance of the adhesive by UV polymerization and solution thermal polymerization reaction, and at the same time improves the flexibility and temperature resistance of the adhesive film. Detailed Implementation

[0022] The present invention will be further illustrated below with reference to specific embodiments. These embodiments are implemented based on the technical solutions of the present invention, and it should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0023] Example 1

[0024] A method for preparing a high-temperature resistant oil-acrylic adhesive includes the following steps:

[0025] (1) Mix 20 parts of acrylonitrile, 30 parts of ethyl acrylate, and 0.5 parts of hydroxyethyl acrylate into a three-necked flask, add 50 parts of N,N-dimethylformamide, 0.3 parts of dodecyl mercaptan, and 0.10 parts of 1-hydroxycyclohexylphenyl ketone, stir, purge with nitrogen for 20 min to remove oxygen from the flask, irradiate with UV for 10 min and turn off the UV light source, cool in a 20℃ water bath to obtain UV copolymer ① with a conversion rate of 8% and a molecular weight Mw of 6000.

[0026] (2) Add 20 parts of butyl acrylate, 25 parts of ethyl acrylate, 20 parts of UV polymer ①, 1 part of methacrylic acid, 1 part of diacetone acrylamide, 1 part of N-hydroxymethyl acrylamide, 2 parts of glycidyl acrylate, 0.5 parts of hydroxyethyl acrylate, 0.5 parts of dodecyl mercaptan, and 60 parts of ethyl acetate to a three-necked flask. Heat the solution in a water bath at 68°C for 10 min. Add 0.25 parts of azobisisobutyronitrile initiator. After confirming initiation, keep the solution at 68°C for 2 h and then raise the temperature to 73°C. Add 0.1 parts of azobisisobutyronitrile initiator. Keep the solution at 80°C for 1.5 h and then reflux. Add 0.3 parts of azobisisobutyronitrile and 40 parts of ethyl acetate. Keep the solution at 80°C for 3 h. Add 50 parts of ethyl acetate and stir until homogeneous. Cool the solution to below 50°C and discharge the solution to obtain high-temperature resistant oil acrylate adhesive YS-01.

[0027] Example 2

[0028] A method for preparing a high-temperature resistant oil-acrylic adhesive includes the following steps:

[0029] (1) Mix 20 parts of acrylonitrile, 30 parts of ethyl acrylate, and 0.5 parts of hydroxyethyl acrylate into a three-necked flask, add 50 parts of N,N-dimethylformamide, 0.3 parts of dodecyl mercaptan, and 0.10 parts of 1-hydroxycyclohexylphenyl ketone, stir, purge with nitrogen for 20 min to remove oxygen from the flask, irradiate with UV for 20 min and turn off the UV light source, cool in a 20℃ water bath to obtain UV copolymer ②, with a conversion rate of 15% and a molecular weight Mw of 150,000.

[0030] (2) Add 20 parts of butyl acrylate, 25 parts of ethyl acrylate, 20 parts of UV polymer ②, 1 part of methacrylic acid, 1 part of diacetone acrylamide, 1 part of N-hydroxymethylacrylamide, 2 parts of glycidyl acrylate, 0.5 parts of hydroxyethyl acrylate, 0.5 parts of dodecyl mercaptan, and 60 parts of ethyl acetate to a three-necked flask. Heat the solution in a water bath at 68°C for 10 min. Add 0.25 parts of azobisisobutyronitrile initiator. After confirming initiation, keep the solution at 68°C for 2 h and then raise the temperature to 73°C. Add 0.1 parts of azobisisobutyronitrile initiator. Keep the solution at 80°C for 1.5 h and then reflux. Add 0.3 parts of azobisisobutyronitrile and 40 parts of ethyl acetate. Keep the solution at 80°C for 3 h and then add 50 parts of ethyl acetate. Stir well and cool to below 50°C. Discharge the solution to obtain high-temperature resistant oil acrylate adhesive YS-02.

[0031] Example 3

[0032] A method for preparing a high-temperature resistant oil-acrylic adhesive includes the following steps:

[0033] (1) Mix 20 parts of acrylonitrile, 30 parts of ethyl acrylate, and 0.5 parts of hydroxyethyl acrylate into a three-necked flask, add 50 parts of ethyl acetate, 0.3 parts of dodecyl mercaptan, and 0.30 parts of 1-hydroxycyclohexylphenyl ketone, stir, purge with nitrogen for 10 min to remove oxygen from the flask, irradiate with UV for 10 min and turn off the UV light source, cool in a 20℃ water bath, UV copolymer ③, conversion rate 8%, molecular weight Mw is 20,000.

[0034] (2) Add 20 parts of butyl acrylate, 25 parts of ethyl acrylate, 20 parts of UV copolymer ③, 1 part of methacrylic acid, 1 part of diacetone acrylamide, 1 part of N-hydroxymethylacrylamide, 2 parts of glycidyl acrylate, 0.5 parts of hydroxyethyl acrylate, 0.5 parts of dodecyl mercaptan, and 60 parts of ethyl acetate to a three-necked flask. Heat the solution in a water bath at 68°C for 10 min. Add 0.25 parts of azobisisobutyronitrile initiator. After confirming initiation, heat the solution at 68°C for 2 h and then raise the temperature to 73°C. Add 0.1 parts of azobisisobutyronitrile initiator. Heat the solution at 80°C for 1.5 h and then reflux. Add 0.3 parts of azobisisobutyronitrile and 40 parts of ethyl acetate. Heat the solution at 80°C for 3 h and then add 50 parts of ethyl acetate. Stir well and cool the solution to below 50°C. Discharge the solution to obtain high-temperature resistant oil acrylate adhesive YS-03.

[0035] Example 4

[0036] A method for preparing a high-temperature resistant oil-acrylic adhesive includes the following steps:

[0037] (1) Mix 20 parts of acrylonitrile, 30 parts of ethyl acrylate, and 0.5 parts of hydroxyethyl acrylate into a three-necked flask, add 50 parts of ethyl acetate, 0.3 parts of dodecyl mercaptan, and 0.30 parts of 1-hydroxycyclohexylphenyl ketone, stir, purge with nitrogen for 20 min to remove oxygen from the flask, irradiate with UV for 10 min and turn off the UV light source, cool in a 20℃ water bath, UV copolymer ④, conversion rate 15%, molecular weight Mw is 180,000.

[0038] (2) Add 20 parts of butyl acrylate, 25 parts of ethyl acrylate, 20 parts of UV copolymer ④, 1 part of methacrylic acid, 1 part of diacetone acrylamide, 1 part of N-hydroxymethylacrylamide, 2 parts of glycidyl acrylate, 0.5 parts of hydroxyethyl acrylate, 0.5 parts of dodecyl mercaptan, and 60 parts of ethyl acetate to a three-necked flask. Heat the solution in a water bath at 68°C for 10 min. Add 0.25 parts of azobisisobutyronitrile initiator. After confirming initiation, heat the solution at 68°C for 2 h and then raise the temperature to 73°C. Add 0.1 parts of azobisisobutyronitrile initiator. Heat the solution at 1.5 h and then reflux at 80°C. Add 0.3 parts of azobisisobutyronitrile and 40 parts of ethyl acetate. Heat the solution at 3 h and then add 50 parts of ethyl acetate. Stir well and cool the solution to below 50°C. Discharge the solution to obtain high-temperature resistant oil acrylate adhesive YS-04.

[0039] Example 5

[0040] A method for preparing a high-temperature resistant oil-acrylic adhesive includes the following steps:

[0041] (1) Mix 15 parts of styrene, 30 parts of acrylonitrile, and 0.5 parts of hydroxyethyl acrylate into a three-necked flask, add 50 parts of ethyl acetate, 0.3 parts of dodecyl mercaptan, and 0.10 parts of 1-hydroxycyclohexylphenyl ketone, stir, purge with nitrogen for 20 min to remove oxygen from the flask, irradiate with UV for 20 min, turn off the UV light source, and cool in a 20°C water bath to obtain UV copolymer ⑤ with a conversion rate of 10% and a molecular weight Mw of 25,000.

[0042] (2) Add 25 parts of butyl acrylate, 25 parts of ethyl acrylate, 20 parts of UV polymer ⑤, 1 part of methacrylic acid, 1 part of diacetone acrylamide, 1 part of N-hydroxymethylacrylamide, 0.5 parts of dodecyl mercaptan, 2 parts of glycidyl acrylate, 0.5 parts of hydroxyethyl acrylate, and 60 parts of ethyl acetate to a three-necked flask. Heat the solution in a water bath at 68°C for 10 min. Add 0.25 parts of azobisisobutyronitrile initiator. After confirming initiation, keep the solution at 68°C for 2 h and then raise the temperature to 73°C. Add 0.1 parts of azobisisobutyronitrile initiator. Keep the solution at 80°C for 1.5 h and then reflux. Add 0.3 parts of azobisisobutyronitrile and 40 parts of ethyl acetate. Keep the solution at 80°C for 3 h and then add 50 parts of ethyl acetate. Stir well and cool to below 50°C. Discharge the solution to obtain high-temperature resistant oil acrylate glue YS-05. The glue is slightly turbid.

[0043] Example 6

[0044] A method for preparing a high-temperature resistant oil-acrylic adhesive includes the following steps:

[0045] (1) Mix 15 parts of styrene, 30 parts of acrylonitrile, and 0.5 parts of hydroxyethyl acrylate into a three-necked flask, add 50 parts of ethyl acetate, 0.3 parts of dodecyl mercaptan, and 0.10 parts of 1-hydroxycyclohexylphenyl ketone, stir, purge with nitrogen for 20 min to remove oxygen from the flask, irradiate with UV for 30 min, turn off the UV light source, and cool in a 20°C water bath to obtain UV copolymer ⑥ with a conversion rate of 20% and a molecular weight of 300,000 Mw.

[0046] (2) Add 25 parts of butyl acrylate, 25 parts of ethyl acrylate, 20 parts of UV polymer ⑥, 1 part of methacrylic acid, 1 part of diacetone acrylamide, 1 part of N-hydroxymethylacrylamide, 0.5 parts of dodecyl mercaptan, 2 parts of glycidyl acrylate, 0.5 parts of hydroxyethyl acrylate, and 60 parts of ethyl acetate to a three-necked flask. Heat the solution in a water bath at 68°C for 10 min. Add 0.25 parts of azobisisobutyronitrile initiator. After confirming initiation, heat the solution at 68°C for 2 h and then raise the temperature to 73°C. Add 0.1 parts of azobisisobutyronitrile initiator and heat the solution at 1.5 h. Then heat the solution to reflux and add 0.3 parts of azobisisobutyronitrile and 40 parts of ethyl acetate. Heat the solution at 3 h and then add 50 parts of ethyl acetate. Stir the solution evenly and cool it down to below 50°C. Discharge the solution to obtain high-temperature resistant oil acrylate glue YS-06. The glue is cloudy.

[0047] Comparative Example 1

[0048] In a three-necked flask, add 25 parts butyl acrylate, 35 parts ethyl acrylate, 10 parts acrylonitrile, 1 part methacrylic acid, 1 part diacetone acrylamide, 1 part N-hydroxymethylacrylamide, 0.5 parts dodecyl mercaptan (chain transfer agent), 2 parts glycidyl acrylate, 1 part hydroxyethyl acrylate, and 60 parts ethyl acetate (solvent). Heat in a water bath to 68°C and maintain the solution temperature for 10 minutes. Add 0.25 parts azobisisobutyronitrile (AIB) initiator. After confirming initiation, maintain the temperature at 68°C for 2 hours, then raise the temperature to 73°C and add 0.1 parts azobisisobutyronitrile (AIB) initiator. Maintain the temperature for 1.5 hours, then raise the temperature to reflux and add 0.3 parts azobisisobutyronitrile (AIB) initiator and 40 parts ethyl acetate. Maintain the temperature for 3 hours, then add 50 parts ethyl acetate. Stir until homogeneous, cool to below 50°C, and discharge to obtain high-temperature resistant oil-based acrylate adhesive YS-07.

[0049] The physical properties of the high-temperature resistant oil-based acrylate adhesives prepared in Examples 1-6 and Comparative Example 1 were tested, and the results are shown in Table 1.

[0050] Table 1 Physical properties of the high-temperature resistant oil-acrylate adhesives prepared in Examples 1-6 and Comparative Example 1

[0051]

[0052] As shown in Table 1:

[0053] 1. As can be seen from the conversion rates in Examples 1-2 and Comparative Example 1, the conversion rate is improved after prepolymerization by UV method;

[0054] 2. As can be seen from the examples, UV polymers with high conversion rates and large molecular weights synthesize high-temperature resistant adhesives with large molecular weights.

[0055] 3. From the appearance, the UV method synthesis and the mixture of the two hard monomers have a great influence on the compatibility of the system. The system is incompatible, resulting in phase separation.

[0056] The high-temperature resistant oil-acrylate adhesives and their films prepared in Examples 1-6 and Comparative Example 1 were used for performance testing. The film preparation steps included: taking 100g of the high-temperature resistant oil-acrylate adhesive, adding 1g of phthalic anhydride, 0.1g of 2-methylimidazole, 0.5g of BYK-310 leveling agent, and 15g of ethyl acetate, and stirring until homogeneous. The adhesive was coated onto a 50µm release film, surface-dried at 120℃ for 5 minutes, and then cured at 80℃ for 2 hours under a programmed temperature rise: then increased to 150℃ for 2 hours within 20 minutes to obtain the high-temperature resistant and oil-resistant film. The high-temperature and oil resistance properties were compared through comparative testing. The results are shown in Table 2.

[0057] The peel strength test was conducted using the GBT-2792 method, which involved a 180° peel strength test with a structure of 100µm PI + 30µm adhesive layer + 100µm PI.

[0058] The oil absorption rate was tested using the standard method of GB / T 3780.2-2017.

[0059] 240℃ / 2h high temperature resistance test method: cure the glue into an adhesive according to the above method, weigh a certain mass of adhesive film, put it in a 240℃ constant temperature chamber for 2 hours, and test the mass change rate before and after.

[0060] The mass loss of TGA was determined using the TGA test standard: 10 mg of sample was weighed, and the temperature was increased from 25 °C to 600 °C under a nitrogen atmosphere at a heating rate of 20 K / min. The mass change was then recorded as the temperature increased.

[0061] Oil resistance: The adhesive is used to bond PI and PI together, and the samples are placed in an oil bath at 180℃ for 500 hours. The condition of the samples is observed every 50 hours. There should be no bubbles and no delamination.

[0062] Tensile strength test method: GBT-1040.3 standard for determination of film tensile test.

[0063] Table 2 Performance tests of the adhesives prepared in Examples 1-6 and Comparative Example 1, and the adhesive films prepared from these adhesives.

[0064]

[0065] As shown in Table 2:

[0066] 1. As can be seen from the examples, increasing the molecular weight of the UV polymer is beneficial to improving the tensile strength of the adhesive, as well as its temperature resistance and oil resistance.

[0067] 2. As can be seen from Comparative Example 1 and the examples, the addition of UV polymer significantly improves temperature resistance, oil resistance, and tensile strength (toughness).

[0068] 3. A comparison between Examples 5-6 and Examples 1-2 and 3-4 reveals that the phase separation structure has a significant impact on the oil resistance performance, resulting in deviations in oil resistance performance.

[0069] 4. A comparison of Examples 1-2 and Examples 3-4 reveals that the introduction of hydroxyl structures into the UV polymer is beneficial to improving the temperature and oil resistance of the adhesive, possibly due to increased crosslinking density and higher cohesive strength.

[0070] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A process for the preparation of high temperature resistant oil based acrylic adhesive, characterized by: It comprises the following steps: 1) hard monomer, soft monomer, functional monomer, photoinitiator, chain transfer agent are added into organic solvent, nitrogen is blown, stirring is uniform, UV light is reacted to obtain UV copolymer; wherein the conversion rate of UV copolymer is 5-20%, and the molecular weight Mw is 6000-3000000; 2) UV copolymer obtained in step 1), soft monomer, functional monomer, chain transfer agent are added into organic solvent, heating reaction and heat preservation are carried out, then thermal initiator is added, heat preservation is carried out, cooling is carried out, and adhesive is obtained after discharging.

2. The process for the preparation of high temperature resistant oil based acrylic adhesive as claimed in claim 1, wherein: The hard monomer is selected from one or more of acrylonitrile, styrene, isobornyl acrylate, isobornyl methacrylate and methyl methacrylate; the soft monomer is selected from one or more of ethyl acrylate, butyl acrylate, methoxyethyl acrylate, isooctyl acrylate, lauryl acrylate and dodecyl acrylate.

3. The method for preparing the high-temperature resistant oil-acrylic adhesive according to claim 1, characterized in that: The functional monomer is selected from one or more of acrylic acid, methacrylic acid, acrylamide, N-hydroxymethyl acrylamide, diacetone acrylamide, hydroxyethyl acrylate, glycidyl acrylate, itaconic acid, maleic acid, maleic anhydride and nadic anhydride.

4. The process for the preparation of high temperature resistant oil based acrylic adhesive as claimed in claim 1, wherein: The photoinitiator is selected from one or more of 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-2-methylphenylpropanone and trimethylbenzoyl-diphenyl phosphine oxide; the organic solvent is selected from one or more of N,N-dimethylformamide, N,N-dimethylacetamide, ethyl acetate, butyl acetate, toluene and cyclohexane.

5. The process for the preparation of high temperature resistant oil based acrylic adhesive as claimed in claim 1, wherein: The chain transfer agent is selected from one or more of tertiary dodecyl mercaptan, mercaptoacetic acid, thiophenol, n-butyl mercaptan and 2,4-diphenyl-4-methyl-1-pentene; the thermal initiator is selected from one or more of dibenzoyl peroxide, azobisisobutyronitrile, azobisisoheptyl nitrile, dimethyl azobis isobutyrate and azoisobutyryl cyanamide.

6. The process for the preparation of high temperature resistant oil based acrylic adhesive as claimed in claim 1, wherein: In step 1), by weight parts: hard monomer 20-50 parts, soft monomer 20-40 parts, functional monomer 0.1-0.5 parts, photoinitiator 0.1-0.3 parts, chain transfer agent 0.1-0.5 parts, organic solvent 50-100; UV irradiation reaction time is 10-30 min.

7. The process for the preparation of high temperature resistant oil based acrylic adhesive as claimed in claim 1, wherein: In step 2), by weight parts: UV polymer 10-30, soft monomer 40-60 parts, functional monomer 5-10 parts, thermal initiator 0.1-1 parts, chain transfer agent 0.1-0.5 parts, solvent 50-100 parts; reaction temperature is 50-120 DEG C.

8. The high-temperature-resistant oil-resistant acrylic adhesive prepared by the preparation method of the high-temperature-resistant oil-resistant acrylic adhesive according to any one of claims 1-7.

9. The application of the high-temperature-resistant oil-resistant acrylic adhesive according to claim 8 in preparing adhesive film.

10. Use of the high temperature resistant oil-based acrylic adhesive according to claim 9 for the preparation of a film, characterized in that, The adhesive, curing agent and leveling agent are stirred in organic solvent to be uniform, and then coated on a release film, dried, and cured to obtain an adhesive film; wherein the curing agent is selected from one or more of 2-ethyl-4-methylimidazole, 2-methylimidazole, m-phenylenediamine, toluene dimethylamine, aminobenzene sulfone, 4,4-diaminodiphenyl methane, benzene anhydride, 4,4-diaminocyclohexane, PM200, HT100, and the leveling agent is selected from one or more of BYK-333, BYK-306, BYK-310, KH550, KH560, and MP2000.

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