Pressure-sensitive adhesive capable of being cured by electron beams and ultraviolet light and preparation method of pressure-sensitive adhesive

Abstract

The invention discloses a pressure-sensitive adhesive capable of being cured by electron beams and ultraviolet light and a preparation method of the pressure-sensitive adhesive, and belongs to the technical field of pressure-sensitive adhesive production.The preparation method comprises the steps that polyurethane acrylate resin with proper functionality is prepared, specifically, a bio-based hydroxyl monomer, hydroxyl acrylate, a catalyst and a polymerization inhibitor are added into a reaction container according to the proportion, and the mixture is stirred to be uniform; heating while stirring, then adding diisocyanate according to the proportion for reaction, heating for reaction, and discharging to obtain the polyurethane adhesive. And preparation of the electron beam / ultraviolet light curing pressure-sensitive adhesive: taking a proper amount of urethane acrylate resin, heating to a proper temperature while stirring, adding a proper amount of soft / hard monomer, a proper amount of active monomer, a proper amount of tackifying resin and a proper amount of photoinitiator according to a ratio, uniformly stirring, and discharging to obtain the electron beam / ultraviolet light curing pressure-sensitive adhesive. The problems that conventional bifunctional resin is poor in initial adhesion and persistent adhesion and single in curing mode are solved, and the method has the advantages of efficiency and cost.

Description

Technical Field

[0001] The present invention relates to the technical field of the preparation and application of pressure-sensitive adhesives, and particularly relates to a pressure-sensitive adhesive that can be cured by electron beam and ultraviolet light, and a preparation method thereof. Background Art

[0002] Acrylate pressure-sensitive adhesives have excellent adhesive properties, aging resistance, medium resistance, and good transparency, and are widely used in industries such as packaging, building materials, furniture, and electronic equipment. Their types mainly include solvent-based, emulsion-based, hot-melt-based, and radiation-curable types. Solvent-based acrylate pressure-sensitive adhesives have advantages such as good wettability, strong initial tack, fast drying, and good water resistance, but they require the use of a large amount of organic solvents, which not only wastes energy, is harmful to the environment and human body, but also has a potential safety hazard of flammability; Emulsion-based acrylate pressure-sensitive adhesives use water as the dispersion medium and do not use organic solvents. They have the advantages of environmental friendliness, simple process, safe use, and low cost, but have problems such as poor water resistance, slow drying, and poor wettability; Hot-melt-based acrylate pressure-sensitive adhesives do not require a dispersion medium, the solid content can reach 100%, and high-speed coating can be achieved, but high-temperature coating is required, with high energy consumption, easy overflow of glue under high-temperature conditions, and poor heat resistance; Radiation-curable acrylate pressure-sensitive adhesives are divided into 2 types: UV curing and EB curing, both of which use the energy of radiation to cure the liquid adhesive. The UV curing system is not only environmentally friendly and energy-saving, but also can avoid the aging problem of pressure-sensitive adhesives caused by high-temperature coating of hot-melt adhesives, and has good thermal stability. Photoinitiators need to be added to its formulation. The EB system formulation is basically the same as the UV system, but the EB energy is higher, and photoinitiators do not need to be added to the formulation, which has a greater cost advantage.

[0003] However, current pressure-sensitive adhesive products all adopt a single curing method, cannot be flexibly produced according to the needs of the enterprise itself, and require re-formulating the recipe when changing the curing method, which greatly restricts the competitiveness.

[0004] In summary, the present invention prepares a pressure-sensitive adhesive that can be cured by electron beam / ultraviolet light, which is not only environmentally friendly, energy-saving, and green economy, but also can freely select the curing method (EA or UV) according to the needs, is flexible and changeable, and has a more positive significance for enterprises to reduce costs and improve efficiency. Summary of the Invention

[0005] Therefore, the present invention provides a pressure-sensitive adhesive that can be cured by electron beam and ultraviolet light, and a preparation method thereof, to solve the related technical problems existing in the prior art. The pressure-sensitive adhesive prepared by this method has excellent comprehensive properties (initial tack, holding tack, and peel strength), can be used for electronic-grade pressure-sensitive adhesives, and the method is simple, economically feasible, environmentally friendly, and has a flexible curing method, with good application prospects and value.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] According to a first aspect of the present invention, there is provided a method for preparing an electron beam and ultraviolet light curable pressure-sensitive adhesive, comprising the following steps:

[0008] (1) Preparation of a polyurethane acrylate resin with appropriate functionality: First, add a bio-based hydroxyl monomer, a hydroxy acrylate, a catalyst, and an inhibitor to a reaction vessel in proportion, heat to 50-60 °C with stirring, then add a diisocyanate in proportion, react for 3-5 h, heat to 70-75 °C, and react for 1-2 h, and then discharge to obtain the product;

[0009] (2) Preparation of an electron beam / ultraviolet light curable pressure-sensitive adhesive: Take an appropriate amount of the polyurethane acrylate resin, heat to an appropriate temperature with stirring, and add an appropriate amount of soft / hard monomers, an appropriate amount of reactive monomers, an appropriate amount of tackifying resin, and an appropriate amount of photoinitiator in proportion. After stirring evenly, discharge to obtain the product.

[0010] Further, in the step (1), the molar ratio of the diisocyanate to the hydroxy acrylate is 1:1; the molar ratio of the diisocyanate to the bio-based hydroxyl monomer is 3:1; the catalyst is dibutyltin dilaurate, and its dosage is 0.05-0.1% of the total mass of the substances; the inhibitor is hydroquinone and / or p-methoxyphenol, and its dosage is 0.06-0.1% of the total mass of the substances.

[0011] Further, in the step (1), the appropriate functionality is trifunctionality.

[0012] Further, in the step (1), the bio-based hydroxyl monomer is bio-based jatropha oil polyol and / or castor oil.

[0013] Further, in the step (1), the hydroxy acrylate is one or more of 2-hydroxyethyl (meth)acrylate and 2-hydroxypropyl (meth)acrylate. Here, 2-hydroxyethyl (meth)acrylate represents two different components, namely 2-hydroxyethyl acrylate without methyl and 2-hydroxyethyl methacrylate with methyl. The same applies hereinafter.

[0014] Further, in the step (1), the diisocyanate is one or more of toluene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate, and hexamethylene diisocyanate.

[0015] Further, in the step (2), the appropriate amount of the polyurethane acrylate resin means that the polyurethane acrylate resin accounts for 20-30% of the total mass of the reaction system.

[0016] Further, in the step (2), heating to an appropriate temperature means a temperature range of 25-30 °C.

[0017] Further, in the step (2), adding an appropriate amount of soft / hard monomers means that the total amount of soft and hard monomers accounts for 40-50% of the total mass, and the mass ratio of soft and hard monomers is 9:1;

[0018] The soft monomer is one or more of n-butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, decyl (meth)acrylate, lauryl (meth)acrylate, tetrahydrofurfuryl (meth)acrylate, benzyl (meth)acrylate, 2-phenoxyethyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, ethoxyethoxyethyl acrylate;

[0019] The hard monomer is one or more of methyl (meth)acrylate, isobornyl (meth)acrylate, isooctyl (meth)acrylate, tert-butyl (meth)acrylate, (meth)acrylic acid.

[0020] Further, in the step (2), adding an appropriate amount of reactive monomers means that the total amount of reactive monomers accounts for 10-20% of the total mass, and the mass ratio of mono- and difunctional monomers is 3:2;

[0021] The monofunctional monomer is one or more of styrene (St), vinyl pyrrolidone (NVP), vinyl acetate (VA), butyl acrylate (BA), 2-ethylhexyl acrylate (EHA), 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate;

[0022] The difunctional monomer is one or more of 1,6-hexanediol diacrylate (HDDA), tripropylene glycol diacrylate (TPGDA), neopentyl glycol diacrylate (NPGDA).

[0023] Further, in the step (2), adding an appropriate amount of tackifying resin means that it accounts for 0-10% of the total mass, and the tackifying resin is (modified) rosin resin and / or acrylic resin.

[0024] Further, in the step (2), adding an appropriate amount of photoinitiator means a UV curing (UV) system, and the addition amount accounts for 3-5% of the total mass. The photoinitiator is one or more of 2-hydroxy-2-methyl-1-phenylpropanone (1173), 1-hydroxy-cyclohexyl phenyl ketone (184), 2,4,6-trimethylbenzoyl diphenylphosphine oxide (TPO).

[0025] According to the second aspect of the present invention, a pressure-sensitive adhesive curable by electron beam and ultraviolet light is provided, which is prepared according to the preparation method described above.

[0026] The present invention has the following advantages:

[0027] (1) The present invention prepares a trifunctional PUA resin containing acrylate double bond structure using bio-based hydroxy monomers. The raw materials are environmentally friendly, and the one-step method is adopted, which simplifies the preparation process, shortens the reaction time. Due to the steric hindrance effect of the addition of hydroxy monomers, the reaction is stable, the prepared resin has low viscosity, and there is no need to add reactive monomers, greatly reducing the cost and being more environmentally friendly and friendly to the human body. At the same time, the smooth progress of the reaction also greatly increases the stability of the product.

[0028] (2) The preparation process of the present invention is green and environmentally friendly, simple to operate, economical and easy to implement, with flexible curing methods and high production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only exemplary, and for those of ordinary skill in the art, without creative efforts, other implementation drawings can also be obtained according to the provided drawings.

[0030] The structures, ratios, sizes, etc. illustrated in this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the limited conditions for the implementation of the present invention. Therefore, they do not have technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present invention.

[0031] Figure 1 It is a curing process diagram of the pressure-sensitive adhesive in the present invention, and two curing methods can be adopted;

[0032] Figure 2 It is a curing method diagram of Examples 1, 3, and 5 of the present invention, and electron beam curing is adopted;

[0033] Figure 3 It is a curing method diagram of Examples 2, 4, and 6 of the present invention, and UV light curing is adopted. DETAILED DESCRIPTION OF THE INVENTION

[0034] The following specific embodiments illustrate the embodiments of the present invention. Those familiar with this technology can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope protected by the present invention.

[0035] According to a first aspect of the present invention, there is provided a method for preparing an electron beam and ultraviolet curable pressure-sensitive adhesive, comprising the following steps:

[0036] (1) Preparation of a polyurethane acrylate resin with appropriate functionality: First, add a bio-based hydroxyl monomer, a hydroxy acrylate, a catalyst, and an inhibitor to a reaction vessel in proportion, heat to 50 - 60 °C with stirring, then add a diisocyanate in proportion, react for 3 - 5 h, heat to 70 - 75 °C, react for 1 - 2 h, and discharge to obtain;

[0037] (2) Preparation of an electron beam / ultraviolet curable pressure-sensitive adhesive: Take an appropriate amount of the polyurethane acrylate resin, heat to an appropriate temperature with stirring, and add an appropriate amount of soft / hard monomers, an appropriate amount of reactive monomers, an appropriate amount of tackifying resin, and an appropriate amount of photoinitiator in proportion. After stirring evenly, discharge to obtain.

[0038] Further, in the step (1), the molar ratio of the diisocyanate to the hydroxy acrylate is 1:1; the molar ratio of the diisocyanate to the bio-based hydroxyl monomer is 3:1; the catalyst is dibutyltin dilaurate, and its dosage is 0.05 - 0.1% of the total mass of the substances; the inhibitor is hydroquinone and / or p-methoxyphenol, and its dosage is 0.06 - 0.1% of the total mass of the substances.

[0039] Further, in the step (1), the appropriate functionality is trifunctionality.

[0040] Further, in the step (1), the bio-based hydroxyl monomer is bio-based jatropha oil polyol and / or castor oil.

[0041] Further, in the step (1), the hydroxy acrylate is one or two of 2-hydroxyethyl (meth)acrylate and 2-hydroxypropyl (meth)acrylate.

[0042] Further, in the step (1), the diisocyanate is one or several of toluene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate, and hexamethylene diisocyanate.

[0043] Further, in the step (2), the appropriate amount of the polyurethane acrylate resin means that the polyurethane acrylate resin accounts for 20 - 30% of the total mass of the reaction system.

[0044] Further, in the step (2), heating to an appropriate temperature means a temperature range of 25 - 30 °C.

[0045] Further, in the step (2), adding an appropriate amount of soft / hard monomers means that the total amount of the soft and hard monomers accounts for 40 - 50% of the total mass, and the mass ratio of the soft and hard monomers is 9:1;

[0046] The soft monomer is one or more of n-butyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, decyl (meth)acrylate, lauryl (meth)acrylate, tetrahydrofurfuryl (meth)acrylate, benzyl (meth)acrylate, 2-phenoxyethyl (meth)acrylate, 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 2-hydroxybutyl (meth)acrylate, and ethoxyethoxyethyl acrylate;

[0047] The hard monomer is one or more of methyl (meth)acrylate, isobornyl (meth)acrylate, isooctyl (meth)acrylate, tert-butyl (meth)acrylate, and (meth)acrylic acid.

[0048] Further, in the step (2), adding an appropriate amount of active monomers means that the total amount of active monomers accounts for 10-20% of the total mass, and the mass ratio of mono- and bifunctional monomers is 3:2;

[0049] The monofunctional monomer is one or more of styrene (St), vinylpyrrolidone (NVP), vinyl acetate (VA), butyl acrylate (BA), isooctyl acrylate (EHA), 2-hydroxyethyl (meth)acrylate, and 2-hydroxypropyl (meth)acrylate;

[0050] The bifunctional monomer is one or more of 1,6-hexanediol diacrylate (HDDA), tripropylene glycol diacrylate (TPGDA), and neopentyl glycol diacrylate (NPGDA).

[0051] Further, in the step (2), adding an appropriate amount of tackifying resin means that it accounts for 0-10% of the total mass, and the tackifying resin is (modified) rosin resin and / or acrylic resin.

[0052] Further, in the step (2), adding an appropriate amount of photoinitiator means a UV curing (UV) system, and the addition amount accounts for 3-5% of the total mass. The photoinitiator is one or more of 2-hydroxy-2-methyl-1-phenylpropan-1-one (1173), 1-hydroxycyclohexyl phenyl ketone (184), and 2,4,6-trimethylbenzoyl diphenylphosphine oxide (TPO).

[0053] According to the second aspect of the present invention, a pressure-sensitive adhesive curable by electron beam and ultraviolet light is provided, which is prepared by the preparation method described above.

[0054] The following combines specific embodiments to illustrate the related innovative points of the present invention.

[0055] Example 1

[0056] (1) Preparation of bio-based trifunctional polyurethane acrylate (PUA) resin: Add 150 g of Jatropha curcas oil polyol, 34.8 g of hydroxyethyl acrylate, 0.1 g of dibutyltin dilaurate, and 0.09 g of p-hydroxyanisole into a reaction vessel. Stir and heat up to 50 °C, then add 66.69 g of isophorone diisocyanate. React for 4 h, then heat up to 75 °C and react for 1.5 h to obtain the product.

[0057] (2) Preparation of electron beam curable pressure-sensitive adhesive: Take 25 g of the above PUA resin, stir and heat up to 30 °C, add 20 g of n-butyl acrylate, 25 g of hydroxyethyl methacrylate, 5 g of isooctyl acrylate, 20 g of HDDA, and 5 g of rosin resin. After stirring evenly, discharge to obtain the pressure-sensitive adhesive.

[0058] Example 2

[0059] (1) Preparation of bio-based trifunctional PUA resin: Add 91.7 g of castor oil, 39 g of hydroxypropyl acrylate, 0.1 g of dibutyltin dilaurate, and 0.09 g of p-hydroxyanisole into a reaction vessel. Stir and heat up to 60 °C, then add 66.69 g of isophorone diisocyanate. React for 5 h, then heat up to 75 °C and react for 1 h to obtain the product.

[0060] (2) Preparation of ultraviolet light curable pressure-sensitive adhesive: Take 30 g of the above PUA resin, stir and heat up to 28 °C, add 20 g of n-butyl acrylate, 25 g of hydroxyethyl acrylate, 5 g of isooctyl acrylate, 20 g of TPGDA, and 4 g of photoinitiator 1173. After stirring evenly, discharge to obtain the pressure-sensitive adhesive.

[0061] Example 3

[0062] (1) Preparation of bio-based trifunctional PUA resin: Add 150 g of Jatropha curcas oil polyol, 39 g of hydroxyethyl methacrylate, 0.1 g of dibutyltin dilaurate, and 0.09 g of p-hydroxyanisole into a reaction vessel. Stir and heat up to 55 °C, then add 50.76 g of hexamethylene diisocyanate. React for 4 hours, then heat up to 75 °C and react for 2 h to obtain the product.

[0063] (2) Preparation of electron beam curable pressure-sensitive adhesive: Take 25 g of the above PUA resin, stir and heat up to 25 °C, add 20 g of lauryl acrylate, 25 g of tetrahydrofurfuryl methacrylate, 5 g of isooctyl acrylate, 20 g of NPGDA, and 5 g of acrylic resin. After stirring evenly, discharge to obtain the pressure-sensitive adhesive.

[0064] Example 4

[0065] (1) Preparation of bio-based trifunctional PUA resin: Add 91.7 g of castor oil, 39 g of hydroxypropyl acrylate, 0.1 g of dibutyltin dilaurate, and 0.09 g of p-hydroxyanisole into a reaction vessel. Stir and heat up to 55 °C, then add 66.69 g of isophorone diisocyanate. React for 5 h, then heat up to 75 °C and react for 1 h to obtain it.

[0066] (2) Preparation of UV-curable pressure-sensitive adhesive: Take 30 g of the above PUA resin, stir and heat up to 30 °C, add 20 g of lauryl acrylate, 25 g of tetrahydrofurfuryl methacrylate, 6 g of isooctyl acrylate, 20 g of HDDA, and 3 g of photoinitiator 184. After stirring evenly, discharge to obtain the pressure-sensitive adhesive.

[0067] Example 5

[0068] (1) Preparation of bio-based trifunctional PUA resin: Add 150 g of jatropha oil polyol, 34.8 g of hydroxyethyl acrylate, 0.1 g of dibutyltin dilaurate, and 0.09 g of p-hydroxyanisole into a reaction vessel. Stir and heat up to 50 °C, then add 52.26 g of toluene diisocyanate. React for 4 hours, then heat up to 75 °C and react for 1.5 h to obtain it.

[0069] (2) Preparation of electron beam-curable pressure-sensitive adhesive: Take 25 g of the above PUA resin, stir and heat up to 30 °C, add 20 g of n-butyl acrylate, 25 g of hydroxypropyl methacrylate, 5 g of isooctyl acrylate, 20 g of TPGDA, and 5 g of rosin resin. After stirring evenly, discharge to obtain the pressure-sensitive adhesive.

[0070] Example 6

[0071] (1) Preparation of bio-based trifunctional PUA resin: Add 91.7 g of castor oil, 39 g of hydroxypropyl acrylate, 0.1 g of dibutyltin dilaurate, and 0.09 g of p-hydroxyanisole into a reaction vessel. Stir and heat up to 55 °C, then add 52.26 g of toluene diisocyanate. React for 5 hours, then heat up to 75 °C and react for 1 h to obtain it.

[0072] (2) Preparation of UV-curable pressure-sensitive adhesive: Take 30 g of the above PUA resin, stir and heat up to 25 °C, add 20 g of n-butyl acrylate, 25 g of hydroxyethyl acrylate, 5 g of isooctyl acrylate, 20 g of NPGDA, and 5 g of photoinitiator 1173. After stirring evenly, discharge to obtain the pressure-sensitive adhesive.

[0073] Coat the mixed and prepared adhesive solutions of the above Examples 1, 3, and 5 onto a 50-μm PET film to form a 20-μm thick liquid film, then cover it with a 50-μm PET release film, and then send it into an electron beam irradiator to complete irradiation at 1.5 MV, 10 mA, and a beam current ratio of 1.0, as Figure 1 and2 。

[0074] The adhesive solution prepared by mixing the above Examples 2, 4, and 6 is coated on a 50-μm PET film to form a 20-μm thick liquid film, and then covered with a 50-μm PET release film, and then sent into a UV curing chamber for 2 minutes of light irradiation at about 150 mJ / cm 2 to complete the curing, as Figure 1 and 3 。

[0075] The initial adhesion of the above-cured adhesive film is tested according to GB / 4852 2002 (Method A: inclined plane rolling ball method), the 180° peel strength is tested according to GB / 2792 1998, and the holding power is tested according to GB / 4851 1998. The test performance indexes are shown in Table 1.

[0076] Table 1 Performance test indexes of the examples

[0077]

[0078]

[0079] It can be seen from the above table that the electron beam / ultraviolet curable pressure-sensitive adhesive of the present invention can be electron beam cured or ultraviolet cured, and has excellent comprehensive performance.

[0080] (1) The present invention uses a bio-based hydroxy monomer to prepare a trifunctional PUA resin containing acrylate double bond structures. The selected materials are environmentally friendly, and the one-step method is adopted, which simplifies the preparation process, shortens the reaction time. Due to the steric hindrance effect of the addition of the hydroxy monomer, the reaction is stable, the prepared resin has a low viscosity, there is no need to add active monomers, the cost is greatly reduced, and it is more environmentally friendly and more friendly to the human body; at the same time, the smooth progress of the reaction also greatly increases the stability of the product.

[0081] (2) The preparation process of the present invention is green and environmentally friendly, simple to operate, economical and easy to implement, the curing method is flexible, and the production efficiency is high.

[0082] Although the present invention has been described in detail with general descriptions and specific examples above, on the basis of the present invention, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection of the present invention.

Claims

1. A preparation method of an electron beam and ultraviolet curable pressure-sensitive adhesive, characterized in that It includes the following steps: (1) Preparation of a suitable functionality polyurethane acrylate resin: First, add a bio-based hydroxyl monomer, a hydroxy acrylate, a catalyst, and an inhibitor to a reaction vessel in proportion. Stir and heat up to 50 - 60 °C, then add a diisocyanate in proportion and react for 3 - 5 h. Then heat up to 70 - 75 °C and react for 1 - 2 h. Discharge to obtain the product. (2) Preparation of an electron beam / ultraviolet curable pressure - sensitive adhesive: Take an appropriate amount of the polyurethane acrylate resin, heat it up to a suitable temperature while stirring, and add an appropriate amount of soft / hard monomers, an appropriate amount of reactive monomers, an appropriate amount of tackifying resin, and an appropriate amount of photoinitiator in proportion. After stirring evenly, discharge to obtain the product.

2. The preparation method of the electron beam and ultraviolet curable pressure-sensitive adhesive according to claim 1, characterized in that, In the step (1), the molar ratio of the diisocyanate to the hydroxy acrylate is 1:1; the molar ratio of the diisocyanate to the bio - based hydroxyl monomer is 3:1; the catalyst is dibutyltin dilaurate, and its dosage is 0.05 - 0.1% of the total mass of the substances; the inhibitor is hydroquinone and / or p - methoxyphenol, and its dosage is 0.06 - 0.1% of the total mass of the substances.

3. The preparation method of the electron beam and ultraviolet curable pressure-sensitive adhesive according to claim 1, characterized in that, In the step (1), the suitable functionality is trifunctionality.

4. The preparation method of the electron beam and ultraviolet curable pressure-sensitive adhesive according to claim 1, characterized in that, In the step (1), the bio - based hydroxyl monomer is bio - based jatropha oil polyol and / or castor oil.

5. The preparation method of the electron beam and ultraviolet curable pressure-sensitive adhesive according to claim 1, characterized in that In the step (1), the hydroxy acrylate is one or more of 2 - hydroxyethyl (meth)acrylate, 2 - hydroxypropyl (meth)acrylate.

6. The preparation method of the electron beam and ultraviolet curable pressure-sensitive adhesive according to claim 1, characterized in that, In the step (1), the diisocyanate is one or more of toluene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate, hexamethylene diisocyanate.

7. The preparation method of the electron beam and ultraviolet curable pressure-sensitive adhesive according to claim 1, characterized in that, In the step (2), an appropriate amount of the polyurethane acrylate resin means that the polyurethane acrylate resin accounts for 20 - 30% of the total mass of the reaction system.

8. The preparation method of the electron beam and ultraviolet curable pressure-sensitive adhesive according to claim 1, characterized in that, In the step (2), heating up to a suitable temperature means the temperature range is 25 - 30 °C.

9. The preparation method of the electron beam and ultraviolet curable pressure-sensitive adhesive according to claim 1, characterized in that, In the step (2), adding an appropriate amount of soft / hard monomers means that the total amount of soft and hard monomers accounts for 40 - 50% of the total mass, and the mass ratio of soft and hard monomers is 9:

1. The soft monomer is one or more of n - butyl (meth)acrylate, 2 - ethylhexyl (meth)acrylate, decyl (meth)acrylate, lauryl (meth)acrylate, tetrahydrofurfuryl (meth)acrylate, benzyl (meth)acrylate, 2 - phenoxyethyl (meth)acrylate, 2 - hydroxyethyl (meth)acrylate, 2 - hydroxypropyl (meth)acrylate, 2 - hydroxybutyl (meth)acrylate, ethoxyethoxyethyl acrylate. The hard monomer is one or more of methyl (meth)acrylate, isobornyl (meth)acrylate, isooctyl (meth)acrylate, tert - butyl (meth)acrylate, (meth)acrylic acid.

10. The preparation method of the electron beam and ultraviolet curable pressure-sensitive adhesive according to claim 1, characterized in that, In the step (2), adding an appropriate amount of reactive monomers means that the total amount of reactive monomers accounts for 10 - 20% of the total mass, and the mass ratio of mono - and difunctional monomers is 3:

2. The monofunctional monomer is one or more of styrene (St), vinyl pyrrolidone (NVP), vinyl acetate (VA), butyl acrylate (BA), 2 - ethylhexyl acrylate (EHA), 2 - hydroxyethyl (meth)acrylate, 2 - hydroxypropyl (meth)acrylate. The bifunctional monomer is one or more of 1,6 - hexanediol diacrylate (HDDA), tripropylene glycol diacrylate (TPGDA), and neopentyl glycol diacrylate (NPGDA).

11. The preparation method of the electron beam and ultraviolet curable pressure-sensitive adhesive according to claim 1, characterized in that, In the step (2), adding an appropriate amount of tackifying resin means that it accounts for 0 - 10% of the total mass, and the tackifying resin is rosin resin and / or acrylic resin.

12. The preparation method of the electron beam and ultraviolet curable pressure-sensitive adhesive according to claim 1, characterized in that, In the step (2), adding an appropriate amount of photoinitiator means a UV curing (UV) system, and the addition amount accounts for 3 - 5% of the total mass. The photoinitiator is one or more of 2 - hydroxy - 2 - methyl - 1 - phenylpropan - 1 - one (1173), 1 - hydroxy - cyclohexyl phenyl ketone (184), and 2,4,6 - trimethylbenzoyl diphenylphosphine oxide (TPO).

13. A pressure-sensitive adhesive that can be cured by electron beam and ultraviolet light, characterized in that, It is prepared according to the preparation method described in any one of claims 1 - 12.

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