A uv tackifying adhesive and method of making the same

Abstract

The present application relates to a kind of UV tackifier and its preparation method, belong to tackifier technical field.The UV tackifier described in the present application, including substrate layer, the glue layer being arranged on the one side of the substrate layer, the raw material component of the glue layer and its mass fraction are as follows: acrylic polymer 100 parts, curing agent 0.1-1.0 parts and photoinitiator 0.1-0.5 parts;The raw material component of the acrylic polymer and its mass fraction are as follows: butyl acrylate: 30-60 parts, isooctyl acrylate 15-40 parts, hydroxyethyl acrylate 1-5 parts, acrylamide 5-20 parts, acrylic acid 3-10 parts and reaction initiator 0.02-0.4 parts;The molecular weight of the acrylic polymer is 1-100,000;Glass transition temperature is-60 DEG C to-20 DEG C;Solid content is 38%-42%.The UV tackifier described improves the operability of sticking and heavy work and the yield of product, UV tackifier has the effect of small initial peel strength, easy rework, after ultraviolet irradiation, rapid curing greatly improves peel strength.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of tackifying glue, and particularly relates to a UV tackifying glue and a preparation method thereof. BACKGROUND

[0002] With the iteration of display technology, the adhesive tape needs to have strong adhesion and be reworkable. For example, in the OLED module segment, a high-adhesion supporting film is attached to fix the OLED screen PI, but due to the excessive adhesion, poor attachment will cause a certain yield loss. For example, in the MiniLED module PCBA and glass bonding, the traditional method is to use a strong adhesive tape for fixation, which causes attachment loss. SUMMARY

[0003] To solve the above technical problems, the application provides a UV tackifying glue and a preparation method thereof. The UV tackifying glue improves the operability of attachment and rework and the yield of products. The UV tackifying glue has the functions of small initial peeling force, easy rework, rapid curing after ultraviolet irradiation, and large peeling force.

[0004] A first object of the application is to provide a UV tackifying glue, which comprises a substrate layer and a glue layer arranged on one side of the substrate layer. The raw material components and their mass fractions of the glue layer are as follows: 100 parts of acrylic polymer, 0.1-1.0 parts of curing agent, and 0.1-0.5 parts of photoinitiator.

[0005] The raw material components and their mass fractions of the acrylic polymer are as follows: 30-60 parts of butyl acrylate, 15-40 parts of isooctyl acrylate, 1-5 parts of hydroxyethyl acrylate, 5-20 parts of acrylamide, 3-10 parts of acrylic acid, and 0.02-0.4 parts of reaction initiator.

[0006] The molecular weight of the acrylic polymer is 100,000-1,000,000; the glass transition temperature is -60℃ to -20℃; and the solid content is 38%-42%.

[0007] Further, the molecular weight of the acrylic polymer is 50,000-70,000; the glass transition temperature Tg is -30℃ to -40℃; and the solid content is 40%.

[0008] In an embodiment of the application, the curing agent is one or more of triphenylmethane triisocyanate, hexamethylene diisocyanate trimer, toluene diisocyanate trimer, isophorone diisocyanate trimer, and tris(4-phenyl isocyanate) thiophosphoric acid.

[0009] In an embodiment of the application, the photoinitiator is diphenyl(2,4,6-trimethylbenzoyl) phosphine oxide or 1-hydroxycyclohexyl phenyl ketone.

[0010] In one embodiment of the present application, the reaction initiator is azobisisobutyronitrile and / or dibenzoyl peroxide.

[0011] In one embodiment of the present application, the thickness of the adhesive layer is 5-30 μm.

[0012] In one embodiment of the present application, the material of the substrate layer is polyethylene terephthalate, polyvinyl chloride, polyolefin, polyethylene naphthalate or polyimide; the thickness of the substrate layer is 1.5-200 μm.

[0013] Further, the thickness of the substrate layer is 25-75 μm.

[0014] In one embodiment of the present application, the UV adhesive further comprises a release layer disposed on the other side of the adhesive layer.

[0015] In one embodiment of the present application, the material of the release layer is PET silicone release film, the thickness is 25-75 μm, the release force is 10-30 g / 25 mm, and the residual rate is >90%.

[0016] A second object of the present application is to provide a preparation method of the UV adhesive, comprising the following steps,

[0017] (1) dissolving butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, acrylamide, acrylic acid and a reaction initiator in toluene, stirring and reacting at 65-75°C for 3-5 h to obtain an acrylic polymer;

[0018] (2) dissolving the acrylic polymer of step (1), a curing agent and a photoinitiator in a solvent to obtain an acrylic adhesive;

[0019] (3) coating the acrylic adhesive of step (2) on the surface of a substrate layer, drying at 80-90°C for 4-6 min, and aging at 40-50°C for 40-50 h to obtain the UV adhesive.

[0020] In one embodiment of the present application, in step (2), the solvent is one or more of ethyl acetate, toluene, butanone, isopropyl alcohol and methanol.

[0021] In one embodiment of the present application, in step (2), the material of the substrate layer is polyethylene terephthalate, polyvinyl chloride, polyolefin, polyethylene naphthalate or polyimide; the thickness of the substrate layer is 1.5-200 μm.

[0022] In one embodiment of the present application, in step (2), further comprising compounding a release layer on the surface of the dried material.

[0023] In one embodiment of the present application, the material of the release layer is PET silicone release film, the thickness is 25-75 μm, the release force is 10-30 g / 25 mm, and the residual rate is >90%.

[0024] The technical solution of the present application has the following advantages compared with the prior art:

[0025] The UV tackifying glue has the following advantages: the UV tackifying glue is designed by specific monomer components, the molecular weight of the acrylic glue is small, and there are more double bonds at both ends of the polymer; the acrylamide in the monomer contains carbon-carbon double bonds and amide groups, and is easy to react under UV; and the acrylic glue has good adhesion after bridging of the acrylamide and the viscoelasticity of the acrylic glue increases with the increase of the molecular weight after UV irradiation, so that the fast tackifying effect is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to make the content of the present application more easily understood, the present application is further described in detail below according to specific embodiments of the present application and in combination with the drawings, in which:

[0027] Figure 1 The figure is a structural schematic diagram of the UV tackifying glue of the present application. DETAILED DESCRIPTION

[0028] The present application is further described below in combination with the drawings and specific embodiments, so that those skilled in the art can better understand the present application and implement it, but the embodiments are not limiting to the present application.

[0029] In the present application, unless otherwise specified, the technical and scientific terms used in the present application have the same meanings as those commonly understood by the person skilled in the art to which the present application belongs.

[0030] In the present application, unless otherwise specified, the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0031] In the present application, unless otherwise specified, the ratio range and replacement scheme of each component in the UV tackifying glue can be combined to form a new preparation scheme.

[0032] In the present application, unless otherwise specified, the molecular weight of the acrylic polymer prepared in the embodiments is about 50-70 thousand; the glass transition temperature Tg is about -30℃ to -40℃; the solid content is about 40%; and the viscosity is about 1100 cps.

[0033] Example 1

[0034] Reference Figure 1As shown, a UV tackifying adhesive, from bottom to top, is a substrate layer, a glue layer and a release layer; wherein the substrate layer is a 50μm PET film; the thickness of the glue layer is 10μm; the release layer is a PET single silicon release film, the thickness is 50μm, the release force is 20g / 25mm, and the residual rate is >90%;

[0035] The raw material components of the glue layer and their mass parts are: acrylic polymer 100 mass parts, curing agent toluene diisocyanate trimer 0.9 mass parts, and photoinitiator diphenyl(2,4,6-trimethylbenzoyl) phosphine oxide 0.2 mass parts;

[0036] The raw material components of the acrylic polymer and their mass parts are: butyl acrylate 49.9 mass parts, isooctyl acrylate 30 mass parts, hydroxyethyl acrylate 4 mass parts, acrylamide 10 mass parts, acrylic acid 6 mass parts, and reaction initiator azobisisobutyronitrile 0.1 mass parts.

[0037] The preparation of the above UV tackifying adhesive specifically includes the following steps:

[0038] (1) Mix butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, acrylamide, acrylic acid and reaction initiator, add toluene for dilution, stir with a stirrer at a speed of 400rpm, react at 70℃ for 4h to obtain an acrylic polymer;

[0039] (2) Dissolve the acrylic polymer obtained in step (1), curing agent and photoinitiator in solvent ethyl acetate, stir with a stirrer at a speed of 400rpm, stir at 23±2℃, 50%±5℃ for 30min to obtain an acrylic glue;

[0040] (3) Directly coat the acrylic glue obtained in step (2) on the surface of the substrate layer, dry in an oven after coating, dry at 85℃ for 5min, then composite the release layer, cure at 45℃ for 48h, store in an aluminum foil bag after curing to avoid light, to obtain a UV tackifying adhesive.

[0041] Example 2

[0042] A UV tackifying adhesive, from bottom to top, is a substrate layer, a glue layer and a release layer; wherein the substrate layer is a 50μm PET film; the thickness of the glue layer is 10μm; the release layer is a PET single silicon release film, the thickness is 50μm, the release force is 20g / 25mm, and the residual rate is >90%;

[0043] The raw material components of the glue layer and their mass parts are: acrylic polymer 100 mass parts, curing agent toluene diisocyanate trimer 0.8 mass parts, and photoinitiator diphenyl(2,4,6-trimethylbenzoyl) phosphine oxide 0.3 mass parts;

[0044] The raw material components of the acrylic polymer and the mass parts thereof are as follows: 40 mass parts of butyl acrylate, 39.88 mass parts of isooctyl acrylate, 4 mass parts of hydroxyethyl acrylate, 10 mass parts of acrylamide, 6 mass parts of acrylic acid, and 0.12 mass parts of reaction initiator azobisisobutyronitrile.

[0045] The preparation of the above UV adhesion glue specifically includes the following steps:

[0046] (1) uniformly mix butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, acrylamide, acrylic acid, and a reaction initiator, add toluene for dilution, uniformly stir at a stirring speed of 400 rpm, react at 70℃ for 4 h, and obtain an acrylic polymer;

[0047] (2) dissolve the acrylic polymer obtained in step (1), a curing agent, and a photoinitiator in solvent ethyl acetate, uniformly stir at a stirring speed of 400 rpm, stir at 23±2℃ and 50%±5℃ for 30 min, and obtain an acrylic glue;

[0048] (3) directly coat the acrylic glue obtained in step (2) on the surface of the substrate layer, dry in an oven after coating, dry at 85℃ for 5 min, then composite a release layer, cure at 45℃ for 48 h, store in an aluminum foil bag after curing, and obtain a UV adhesion glue.

[0049] Example 3

[0050] A UV adhesion glue, from bottom to top, sequentially comprises a substrate layer, a glue layer, and a release layer; the substrate layer is a 50μm PET film; the thickness of the glue layer is 10μm; the release layer is a PET single-silicon release film, the thickness is 50μm, the release force is 20g / 25mm, and the residual rate is >90%;

[0051] The raw material components of the glue layer and the mass parts thereof are as follows: 100 mass parts of an acrylic polymer, 0.5 mass parts of curing agent toluene diisocyanate trimer, and 0.2 mass parts of photoinitiator diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide.

[0052] The raw material components of the acrylic polymer and the mass parts thereof are as follows: 40 mass parts of butyl acrylate, 39.9 mass parts of isooctyl acrylate, 5 mass parts of hydroxyethyl acrylate, 11.5 mass parts of acrylamide, 3.5 mass parts of acrylic acid, and 0.1 mass parts of reaction initiator azobisisobutyronitrile.

[0053] The preparation of the above UV adhesion glue specifically includes the following steps:

[0054] (1) uniformly mix butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, acrylamide, acrylic acid, and a reaction initiator, add toluene for dilution, uniformly stir at a stirring speed of 400 rpm, react at 70℃ for 4 h, and obtain an acrylic polymer;

[0055] (2) The acrylic adhesive obtained in step (1) is dissolved in the solvent ethyl acetate, and the stirrer is stirred at a speed of 400 rpm, and stirred at 23±2℃, 50%±5% for 30 min to obtain an acrylic adhesive;

[0056] (3) The acrylic adhesive obtained in step (2) is directly coated on the surface of the substrate layer, and after coating, the oven is dried, dried at 85℃ for 5 min, and then the release layer is compounded, cured at 45℃ for 48h, and then stored in an aluminum foil bag in the dark after curing, to obtain a UV tackifier.

[0057] Example 4

[0058] A UV tackifier, from bottom to top, is a substrate layer, an adhesive layer and a release layer; wherein the substrate layer is a 50μm PET film; the thickness of the adhesive layer is 10μm; the release layer is a PET single silicon release film, the thickness is 50μm, the release force is 20g / 25mm, and the residual rate is >90%;

[0059] The raw material components of the adhesive layer and their mass fractions are: acrylic polymer 100 mass parts, curing agent toluene diisocyanate trimer 0.9 mass parts, and photoinitiator diphenyl(2,4,6-trimethylbenzoyl) phosphine oxide 0.2 mass parts;

[0060] The raw material components of the acrylic polymer and their mass fractions are: butyl acrylate 59.8 mass parts, isooctyl acrylate 20 mass parts, hydroxyethyl acrylate 4 mass parts, acrylamide 8 mass parts, acrylic acid 8 mass parts, and reaction initiator azobisisobutyronitrile 0.2 mass parts.

[0061] The preparation of the above UV tackifier specifically includes the following steps:

[0062] (1) Butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, acrylamide, acrylic acid and reaction initiator are mixed uniformly, diluted with toluene, the stirrer is stirred at a speed of 400 rpm, and reacted at 70℃ for 4h to obtain an acrylic polymer;

[0063] (2) The acrylic polymer obtained in step (1) is dissolved in the solvent ethyl acetate, and the stirrer is stirred at a speed of 400 rpm, and stirred at 23±2℃, 50%±5% for 30 min to obtain an acrylic adhesive;

[0064] (3) The acrylic adhesive obtained in step (2) is directly coated on the surface of the substrate layer, and after coating, the oven is dried, dried at 85℃ for 5 min, and then the release layer is compounded, cured at 45℃ for 48h, and then stored in an aluminum foil bag in the dark after curing, to obtain a UV tackifier.

[0065] Example 5

[0066] A UV tackifying adhesive, from bottom to top, is substrate layer, adhesive layer and release layer in turn; wherein the substrate layer is a 50μm PET film; the thickness of the adhesive layer is 10μm; the release layer is a PET single silicon release film, the thickness is 50μm, the release force is 20g / 25mm, the residual rate is >90%;

[0067] The raw material components of the adhesive layer and their mass parts are: acrylic polymer 100 mass parts, curing agent toluene diisocyanate trimer 0.9 mass parts, photoinitiator diphenyl(2,4,6-trimethylbenzoyl) phosphine oxide 0.2 mass parts;

[0068] The raw material components of the acrylic polymer and their mass parts are: butyl acrylate 39.8 mass parts, isooctyl acrylate 40 mass parts, hydroxyethyl acrylate 5 mass parts, acrylamide 5 mass parts, acrylic acid 10 mass parts, reaction initiator azobisisobutyronitrile 0.2 mass parts.

[0069] The preparation of the above-mentioned UV tackifying adhesive specifically includes the following steps:

[0070] (1) Mix butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, acrylamide, acrylic acid and reaction initiator, add toluene for dilution, stir at a speed of 400rpm, react at 70℃ for 4h to obtain acrylic polymer;

[0071] (2) Dissolve the acrylic polymer obtained in step (1), curing agent and photoinitiator in solvent ethyl acetate, stir at a speed of 400rpm, stir at 23±2℃, 50%±5℃ for 30min to obtain acrylic adhesive;

[0072] (3) Directly coat the acrylic adhesive obtained in step (2) on the surface of the substrate layer, dry in an oven after coating, dry at 85℃ for 5min, then composite the release layer, cure at 45℃ for 48h, store in an aluminum foil bag after curing to avoid light, to obtain the UV tackifying adhesive.

[0073] Example 6

[0074] A UV tackifying adhesive, from bottom to top, is substrate layer, adhesive layer and release layer in turn; wherein the substrate layer is a 50μm PET film; the thickness of the adhesive layer is 10μm; the release layer is a PET single silicon release film, the thickness is 50μm, the release force is 20g / 25mm, the residual rate is >90%;

[0075] The raw material components of the adhesive layer and their mass parts are: acrylic polymer 100 mass parts, curing agent toluene diisocyanate trimer 0.9 mass parts, photoinitiator diphenyl(2,4,6-trimethylbenzoyl) phosphine oxide 0.2 mass parts;

[0076] The raw material components of the acrylic polymer and the mass parts thereof are as follows: butyl acrylate 59.8 mass parts, isooctyl acrylate 20 mass parts, hydroxyethyl acrylate 5 mass parts, acrylamide 12 mass parts, acrylic acid 3 mass parts, and reaction initiator azobisisobutyronitrile 0.2 mass parts.

[0077] The preparation of the UV adhesion glue specifically includes the following steps:

[0078] (1) uniformly mix butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, acrylamide, acrylic acid and reaction initiator, add toluene for dilution, uniformly stir at a stirring speed of 400 rpm, react at 70℃ for 4h to obtain an acrylic polymer;

[0079] (2) dissolve the acrylic polymer obtained in step (1), curing agent and photoinitiator in solvent ethyl acetate, uniformly stir at a stirring speed of 400 rpm, stir at 23±2℃ and 50%±5℃ for 30 min to obtain an acrylic glue;

[0080] (3) directly coat the acrylic glue obtained in step (2) on the surface of the substrate layer, dry in an oven after coating, dry at 85℃ for 5 min, then composite a release layer, cure at 45℃ for 48h, store in an aluminum foil bag after curing to avoid light, and obtain a UV adhesion glue.

[0081] Comparative Example 1

[0082] An adhesion glue, which sequentially comprises a substrate layer, a glue layer and a release layer from bottom to top; wherein the substrate layer is a PET film with a thickness of 50μm; the thickness of the glue layer is 10μm; the release layer is a PET single silicon release film with a thickness of 50μm, a release force of 20g / 25mm and a residual rate of >90%;

[0083] The raw material components of the glue layer and the mass parts thereof are as follows: acrylic polymer 100 mass parts, curing agent toluene diisocyanate trimer 0.9 mass parts, and photoinitiator diphenyl(2,4,6-trimethylbenzoyl)phosphine oxide 0.2 mass parts.

[0084] The raw material components of the acrylic polymer and the mass parts thereof are as follows: butyl acrylate 39.8 mass parts, isooctyl acrylate 40 mass parts, hydroxyethyl acrylate 5 mass parts, acrylic acid 15 mass parts, and reaction initiator azobisisobutyronitrile 0.2 mass parts.

[0085] The preparation of the adhesion glue specifically includes the following steps:

[0086] (1) uniformly mix butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, acrylamide, acrylic acid and reaction initiator, add toluene for dilution, uniformly stir at a stirring speed of 400 rpm, react at 70℃ for 4h to obtain an acrylic polymer;

[0087] (2) The acrylic acid glue water obtained in step (1) is dissolved in solvent ethyl acetate, and the stirrer is stirred at a speed of 400 rpm, and stirred at 23±2℃, 50%±5% for 30 min to obtain acrylic acid glue water;

[0088] (3) The acrylic acid glue water obtained in step (2) is directly coated on the surface of the substrate layer, and after coating, the oven is dried, and after drying at 85℃ for 5 min, the release layer is compounded, and after curing at 45℃ for 48 h, it is stored in an aluminum foil bag in the dark after curing, to obtain a UV tackifier.

[0089] Comparative Example 2

[0090] A tackifier, from bottom to top, is a substrate layer, a glue layer and a release layer; wherein the substrate layer is a 50μm PET film; the thickness of the glue layer is 10μm; the release layer is a PET single silicon release film, the thickness is 50μm, the release force is 20g / 25mm, and the residual rate is >90%;

[0091] The raw material components of the glue layer and their mass fractions are: acrylic acid polymer 100 mass parts, curing agent toluene diisocyanate trimer 0.9 mass parts, and photoinitiator diphenyl(2,4,6-trimethylbenzoyl) phosphine oxide 0.2 mass parts;

[0092] The raw material components of the acrylic acid polymer and their mass fractions are: butyl acrylate 39.8 mass parts, isooctyl acrylate 25 mass parts, hydroxyethyl acrylate 5 mass parts, acrylamide 25 mass parts, acrylic acid 5 mass parts, and reaction initiator azobisisobutyronitrile 0.2 mass parts.

[0093] The preparation of the above tackifier specifically includes the following steps:

[0094] (1) Butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, acrylamide, acrylic acid and reaction initiator are mixed uniformly, diluted with toluene, the stirrer is stirred at a speed of 400 rpm, and reacted at 70℃ for 4h to obtain an acrylic acid polymer;

[0095] (2) The acrylic acid polymer obtained in step (1), curing agent and photoinitiator are dissolved in solvent ethyl acetate, and the stirrer is stirred at a speed of 400 rpm, and stirred at 23±2℃, 50%±5% for 30 min to obtain acrylic acid glue water;

[0096] (3) The acrylic acid glue water obtained in step (2) is directly coated on the surface of the substrate layer, and after coating, the oven is dried, and after drying at 85℃ for 5 min, the release layer is compounded, and after curing at 45℃ for 48 h, it is stored in an aluminum foil bag in the dark after curing, to obtain a tackifier.

[0097] Test Example

[0098] The tackifying glue prepared in Examples 1-6 and Comparative Examples 1-2 was tested for peel strength, initial tack and heavy-duty contamination properties:

[0099] (1) Peel strength: tested according to the provisions of GB / T2792-1998; UV energy selected LED cold light source, 365 nm waveband;

[0100] (2) Initial tack: tested Tack according to the ball method;

[0101] (3) Heavy-duty test method: the adhesive tape was adhered to PI at room temperature for 30 min, quickly torn open, and the contamination on the surface of PI was observed; the contamination was observed under a Keyence optical microscope at 1000 times.

[0102] Table 1 shows the relevant parameters of the finally measured materials:

[0103] Table 1

[0104]

[0105] As can be seen from Table 1, the UV tackifying glue prepared in Examples 1-6 has better comprehensive performance. By copolymerization of specific polar monomer components, the UV tackifying glue prepared has a smaller molecular weight and more double bonds at both ends of the polymer. Acrylamide in the monomer contains carbon-carbon double bonds and amide groups, which are easily reacted under UV, and the adhesion after bridging acrylamide is good. If acrylamide is not added for reaction, the tackifying effect of the tackifying glue will be reduced, and the adhesion will also be poor. The viscoelasticity of the UV tackifying glue after UV irradiation increases with the increase of the molecular weight to achieve the tackifying effect.

[0106] Obviously, the above examples are merely examples for the purpose of clear illustration, and are not limiting of the embodiments. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, it is not necessary and impossible to exhaust all the embodiments. The obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A UV-adhesive tape comprising a base material layer, a tape layer provided on one side of said base material layer, characterized in that, The raw material components of the adhesive layer and the mass parts thereof are 100 parts of acrylic polymer, 0.1-1.0 parts of curing agent and 0.1-0.5 parts of photoinitiator; The raw material components of the acrylic polymer and the mass parts thereof are 39.8-60 parts of butyl acrylate, 15-40 parts of isooctyl acrylate, 1-5 parts of hydroxyethyl acrylate, 5-20 parts of acrylamide, 3-10 parts of acrylic acid and 0.02-0.4 parts of reaction initiator; the reaction initiator is azobisisobutyronitrile and / or dibenzoyl peroxide; The molecular weight of the acrylic polymer is 1-100,000; the glass transition temperature is -60℃ to -20℃; and the solid content is 38%-42%; The curing agent is one or more of triphenylmethane triisocyanate, hexamethylene diisocyanate trimer, toluene diisocyanate trimer, isophorone diisocyanate trimer and tris(4-phenyl isocyanate) thiophosphoric acid.

2. The UV tackifying glue according to claim 1, characterized in that, The photoinitiator is diphenyl(2,4,6-trimethylbenzoyl) phosphine oxide or 1-hydroxycyclohexyl phenyl ketone.

3. The UV tackified glue of claim 1, wherein, The thickness of the adhesive layer is 5-30μm.

4. The UV tackified glue of claim 1, wherein, The material of the substrate layer is polyethylene terephthalate, polyvinyl chloride, polyolefin, polyethylene naphthalate or polyimide; and the thickness of the substrate layer is 1.5-200μm.

5. The UV tackified glue of claim 1, wherein, The UV adhesion glue further comprises a release layer arranged on the other side of the adhesive layer.

6. The UV-tackified adhesive of claim 5, wherein The material of the release layer is PET organic silicon release film, the thickness is 25-75μm, the release force is 10-30g / 25mm, and the residual rate is >90%.

7. Process for the preparation of a UV-tackified adhesive according to any one of claims 1 to 6, characterized in that The method comprises the following steps, (1) butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, acrylamide, acrylic acid and reaction initiator are dissolved in toluene, and stirred and reacted at 65℃-75℃ for 3h-5h to obtain acrylic polymer; (2) the acrylic polymer, the curing agent and the photoinitiator in step (1) are dissolved in a solvent to obtain acrylic glue; (3) the acrylic glue in step (2) is coated on the surface of the substrate layer, dried at 80℃-90℃ for 4min-6min, and aged at 40℃-50℃ for 40h-50h to obtain the UV adhesion glue.

8. The method of claim 7, wherein the UV tackifying glue is prepared by the steps of: In step (2), the solvent is one or more of ethyl acetate, toluene, butanone, isopropyl alcohol and methanol.

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