An acrylate resin and a method for preparing the same

Abstract

The application provides an acrylate resin and a preparation method thereof, and more particularly relates to a phase transition acrylate resin and a preparation method thereof. The preparation raw material of the acrylate resin comprises the following components in parts by weight: (meth) acrylate containing a linear alkyl group with C14 or above 35-55 parts, (meth) acrylate containing a C1-C6 alkyl group 35-55 parts, a functional monomer 0.1-10 parts, and a silicon-containing monomer 0.5-3 parts. The application designs the preparation raw material of the acrylate resin, and through the cooperation of the components, an acrylate resin with excellent performance is prepared. The acrylate resin has a suitable weight average molecular weight, suitable polydispersity, high temperature resistance and high adhesion.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of acrylate resins, and particularly relates to an acrylate resin and a preparation method thereof, and more particularly relates to a phase transition acrylate resin and a preparation method thereof. BACKGROUND

[0002] The phase transition polymer exists in a crystalline form below its crystalline melting point, and exhibits a solid state when existing alone, and when mixed with other liquid resins or monomers, the polymer non-crystalline region is locally dissolved by the liquid resins or monomers, and the mixed system exhibits a high viscosity heterogeneous property. Once heated to the vicinity of the polymer melting point, the crystalline region melts, and the mixed system viscosity sharply decreases. After cooling, the dissolved polymer in the system can recover the side chain crystallization state, and the crystalline region is dispersed in the mixed system at a nearly nanometer scale. The most reported polymer is a homopolymer or copolymer of long carbon chain acrylate or corresponding methacrylate, but the methacrylate polymer has a too rigid main chain due to the steric hindrance of the main chain methyl group, which hinders the movement and crystallization of the side chain, and thus the crystalline melting temperature of the polymer is reduced. Compared with the straight chain fatty alcohol acrylate of the same length, the melting point of the methacrylate polymer is generally about 15℃ lower than the crystalline melting point of the acrylate polymer. The crystalline melting temperature of the long carbon chain fatty alcohol acrylate polymer is closely related to the number of carbon atoms in the side chain, and the more the number of carbon atoms in the side chain, the higher the melting point of the side chain crystalline polymer. When the number of carbon atoms in the fatty alcohol is 10 or more, the acrylate polymer formed can form side chain crystallization near room temperature. The long carbon chain fatty alcohol itself also has a fixed melting point, and is also related to the number of carbon atoms. Generally, after forming the acrylate polymer, the side chain crystalline melting point of the polymer is several to tens of degrees lower than the melting point of the precursor long chain fatty alcohol, and the fewer the number of carbon atoms, the greater the difference. When the number of carbon atoms in the long chain fatty alcohol is 18 or more, the side chain crystalline melting point temperature of the polyacrylate is only about 4-8℃ lower than the melting point of the long chain fatty alcohol. For straight chain octadecanol acrylate, the corresponding polymer side chain crystalline melting temperature is 50℃, and the crystalline melting temperature of straight chain docosanol acrylate polymer can be increased to 60℃.

[0003] At present, the most reported side chain crystalline polymer is a homopolymer or copolymer of long carbon chain acrylate or corresponding methacrylate. CN106133011A discloses a side chain crystalline polymer, the side chain of which is a straight carbon alkyl group with a carbon number of 16 or more. The melting point of the side chain crystalline polymer is relatively low, resulting in low temperature resistance and low peeling strength. CN102317399A “Temperature-sensitive adhesive and temperature-sensitive adhesive tape” uses metal chelates to form coordination bonds with the side chain crystalline polymer, thereby improving the heat resistance of the adhesive. The technical scheme only relies on the coordination bond effect, which is limited.

[0004] Therefore, how to provide a phase transition acrylate resin with excellent comprehensive performance has become a technical problem to be solved at present. SUMMARY

[0005] In view of the deficiencies in the prior art, the present application aims to provide an acrylate resin and a preparation method thereof, and more particularly to a phase transition acrylate resin and a preparation method thereof. The present application designs the raw materials for preparing the acrylate resin, and through the cooperation of the components, an acrylate resin with excellent performance is prepared. The acrylate resin has a suitable weight average molecular weight, an adaptive polydispersity, a high temperature resistance and a high adhesion.

[0006] To achieve the above object, the present application adopts the following technical solutions:

[0007] In a first aspect, the present application provides an acrylate resin, and the raw materials for preparing the acrylate resin include the following components in parts by weight:

[0008]

[0009] The present application designs the raw materials for preparing the acrylate resin, and through the cooperation of the components, an acrylate resin with excellent performance is prepared. The acrylate resin has a suitable weight average molecular weight, an adaptive polydispersity, a high temperature resistance and a high adhesion.

[0010] The acrylate resin provided by the present application is an acrylate resin with phase transition performance. When it exists alone, it appears as a solid, and when it is mixed with other materials in the subsequent use process, the amorphous region of the acrylate resin is locally dissolved by the other materials, so that the mixed system exhibits the characteristics of a highly viscous heterogeneous phase. Once heated to the vicinity of the melting point of the acrylate resin, the crystalline region melts, and the acrylate resin can sharply reduce the viscosity of the mixed system. After cooling, the dissolved polymer in the system can restore the side chain crystallization state, and the crystalline region is dispersed in the mixed system at a nearly nanoscale scale.

[0011] The present application uses (meth) acrylate containing a linear alkyl group with C14 or more to prepare an acrylate resin with excellent comprehensive performance. If (meth) acrylate containing a branched alkyl group with C14 or more or (meth) acrylate containing a linear alkyl group with C14 or less is used, the acrylate resin will not have phase transition function and poor comprehensive performance, which has no practical application significance.

[0012] The present application introduces the silicon-containing monomer into the polyacrylate molecular chain by using the silicon-containing monomer, copolymerizing C=C in the silicon-containing monomer and the acrylate (including (meth) acrylate containing C14 or more linear alkyl and (meth) acrylate containing C1-C6 alkyl), and tightly combining in the form of covalent bond, and the chemical structure is as follows:

[0013] wherein, R, R' and R'' represent H, C1-C6 alkyl in (meth) acrylate containing C1-C6 alkyl or C14 or more linear alkyl in (meth) acrylate containing C14 or more linear alkyl.

[0014] The silicon-containing monomer not only has the characteristics of high temperature resistance, oxidation resistance, low surface energy and good flexibility, but also can improve the adhesion of the acrylic resin. Further controlling the amount of the silicon-containing monomer in the preparation of the acrylic resin can make the silicon-containing monomer and other preparation raw materials of the acrylic resin have good compatibility. If the weight fraction of the silicon-containing monomer is small, the adhesion of the prepared acrylic resin is poor; if the weight fraction of the silicon-containing monomer is large, the silicon-containing monomer will self-polymerize, form local cross-linking, have large viscosity or even gel, cause poor compatibility, not tightly combine with the main structure of the acrylic resin, and affect the adhesion of the acrylic resin.

[0015] In the present application, the amount of (meth) acrylate containing C14 or more linear alkyl in the preparation raw materials of the acrylic resin can be 35 parts, 36 parts, 38 parts, 40 parts, 42 parts, 44 parts, 46 parts, 48 parts, 50 parts, 52 parts, 54 parts or 55 parts, etc.

[0016] The amount of (meth) acrylate containing C1-C6 alkyl in the preparation raw materials of the acrylic resin can be 35 parts, 36 parts, 38 parts, 40 parts, 42 parts, 44 parts, 46 parts, 48 parts, 50 parts, 52 parts, 54 parts or 55 parts, etc.

[0017] The amount of the functional monomer in the preparation raw materials of the acrylic resin can be 0.1 part, 0.2 part, 0.5 part, 1 part, 2 parts, 3 parts, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts, 9 parts or 10 parts, etc.

[0018] The amount of the silicon-containing monomer in the preparation raw materials of the acrylic resin can be 0.5 part, 0.8 part, 1 part, 1.2 part, 1.5 part, 1.8 part, 2 part, 2.2 part, 2.4 part, 2.6 part, 2.8 part or 3 part, etc.

[0019] The number of carbon atoms of the linear alkyl group in the (meth)acrylate containing a linear alkyl group with 14 or more carbon atoms can be 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, or 25, etc.

[0020] The number of carbon atoms of the C1-C6 alkyl group in the (meth)acrylate containing a C1-C6 alkyl group can be 1, 2, 3, 4, 5, or 6.

[0021] It should be noted that "(meth)" in the (meth)acrylate containing a linear alkyl group with 14 or more carbon atoms means that methyl can or can not exist, i.e., the (meth)acrylate containing a linear alkyl group with 14 or more carbon atoms means an acrylate containing a linear alkyl group with 14 or more carbon atoms or a methacrylate containing a linear alkyl group with 14 or more carbon atoms; similarly, the (meth)acrylate containing a C1-C6 alkyl group means an acrylate containing a C1-C6 alkyl group or a methacrylate containing a C1-C6 alkyl group.

[0022] The following is a preferred technical solution of the present application, but is not a limitation on the technical solutions provided by the present application. Through the following preferred technical solution, the purpose and beneficial effects of the present application can be better achieved and realized.

[0023] As a preferred technical solution of the present application, the (meth)acrylate containing a linear alkyl group with 14 or more carbon atoms is selected from any one or a combination of at least two of myristyl acrylate, cetyl acrylate, stearyl acrylate, arachidyl acrylate, behenyl acrylate, myristyl methacrylate, cetyl methacrylate, stearyl methacrylate, arachidyl methacrylate, or behenyl methacrylate.

[0024] As a preferred technical solution of the present application, the (meth)acrylate containing a C1-C6 alkyl group is selected from any one or a combination of at least two of methyl acrylate, ethyl acrylate, butyl acrylate, hexyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate, or hexyl methacrylate.

[0025] As a preferred technical solution of the present application, the functional monomer is selected from any one or a combination of at least two of acrylic acid, hydroxyethyl acrylate, 4-hydroxybutyl acrylate, or 2-hydroxypropyl acrylate.

[0026] In the present application, the functional monomer mainly introduces hydroxyl or carboxyl groups into the resin molecular chain to improve the film-forming property of the resin.

[0027] As a preferred technical solution of the present application, the silicon-containing monomer is selected from any one or a combination of at least two of vinyl triisopropoxysilane, vinyl trimethoxysilane, vinyl triethoxysilane, or vinyl tri(β-methoxyethoxy)silane.

[0028] As a preferred technical solution of the present application, the preparation raw material of the acrylic ester resin further comprises an initiator 0.1-0.5 parts by weight, for example, it can be 0.1 parts by weight, 0.15 parts by weight, 0.2 parts by weight, 0.25 parts by weight, 0.3 parts by weight, 0.35 parts by weight, 0.4 parts by weight, 0.45 parts by weight or 0.5 parts by weight, etc.

[0029] Preferably, the initiator comprises a free radical initiator.

[0030] Preferably, the free radical initiator is selected from any one or a combination of at least two of azobisisobutyronitrile, azobisisoheptyl nitrile, azobisisopentyl nitrile, benzoyl peroxide or tert-butyl peroxyl hexahydroterephthalate.

[0031] As a preferred technical solution of the present application, the preparation raw material of the acrylic ester resin further comprises a solvent 150-250 parts by weight, for example, it can be 150 parts by weight, 160 parts by weight, 170 parts by weight, 180 parts by weight, 190 parts by weight, 200 parts by weight, 210 parts by weight, 220 parts by weight, 230 parts by weight, 240 parts by weight or 250 parts by weight, etc.

[0032] Preferably, the solvent is selected from any one or a combination of at least two of dimethyl carbonate, ethyl acetate, toluene, isopropyl alcohol, methyl acetate, methanol or butanone.

[0033] As a preferred technical solution of the present application, the preparation raw material of the acrylic ester resin comprises the following components by weight:

[0034]

[0035] As a preferred technical solution of the present application, the solid content of the acrylic ester resin is 31-32%, for example, it can be 31%, 31.1%, 31.2%, 31.3%, 31.4%, 31.5%, 31.6%, 31.7%, 31.8%, 31.9% or 32%, etc.

[0036] It should be noted that the solid content of the acrylic ester resin in the present application can be obtained by testing according to the method of GB / T 2793-1995.

[0037] As a preferred technical solution of the present application, the viscosity of the acrylic ester resin is 10000-20000 mPa·s, for example, it can be 10000 mPa·s, 11000 mPa·s, 12000 mPa·s, 13000 mPa·s, 14000 mPa·s, 15000 mPa·s, 16000 mPa·s, 17000 mPa·s, 18000 mPa·s, 19000 mPa·s or 20000 mPa·s, etc.

[0038] It should be noted that the viscosity of the acrylic ester resin in the present application can be tested by the method of GB / T 21059-2007.

[0039] As a preferred technical solution of the present application, the weight average molecular weight of the acrylic ester resin is 300-600 (for example, it can be 300, 330, 360, 390, 420, 450, 480, 510, 540, 570 or 600, etc.), and the polydispersity coefficient is 2.8-4.8 (for example, it can be 2.8, 3.0, 3.2, 3.4, 3.6, 3.8, 4.0, 4.2, 4.4, 4.6 or 4.8, etc.).

[0040] It should be noted that the weight average molecular weight and the polydispersity coefficient of the acrylic ester resin in the present application can be tested by the method of GB / T27843-2011.

[0041] Preferably, the melting point (Tm) of the acrylic ester resin is 35-55℃, for example, it can be 35℃, 36℃, 38℃, 40℃, 42℃, 44℃, 46℃, 48℃, 50℃, 52℃, 54℃ or 55℃, etc.

[0042] It should be noted that the melting point of the acrylic ester resin in the present application can be tested by the method of GB / T13464-1992.

[0043] In a second aspect, the present application provides a preparation method of the acrylic ester resin as described in the first aspect, which comprises the following steps:

[0044] (1) mixing (meth) acrylate containing linear alkyl with C14 or above and solvent in a protective atmosphere to obtain a mixture;

[0045] (2) adding (meth) acrylate containing C1-C6 alkyl, functional monomer and part of initiator into the reaction system obtained in step (1) in a protective atmosphere, and reacting to obtain a prepolymer;

[0046] (3) mixing silicon-containing monomer and the remaining initiator, and adding into the reaction system obtained in step (2) to react, thereby obtaining the acrylic ester resin.

[0047] The application designs the preparation method of the acrylate resin, and further designs the adding sequence of each component, so that the acrylate resin with excellent comprehensive performance is prepared.If the step (2) and the step (3) are mixed, that is, the silicon-containing monomer and the monomer in the step (2) are mixed and added into the reaction system together, due to the high reactivity of the silicon-containing monomer, the addition in the step (2) will cause the silicon-containing monomer to react with the functional monomer in the system in advance, forming local crosslinking, the viscosity is large or even gelled, resulting in poor compatibility, the combination with the structure of the main body of the acrylate resin is not tight, and the adhesion of the acrylate resin is affected.

[0048] As a preferred technical solution of the application, the protective atmosphere in the step (1) and the step (2) comprises nitrogen.

[0049] As a preferred technical solution of the application, the method of adding in the step (2) comprises dropwise adding.

[0050] Preferably, the temperature of the dropwise adding in the step (2) is 70-90℃ (for example, it can be 70℃, 72℃, 74℃, 76℃, 78℃, 80℃, 82℃, 84℃, 86℃, 88℃ or 90℃, etc.), and the time is 2-5h (for example, it can be 2h, 2.5h, 3h, 3.5h, 4h, 4.5h or 5h, etc.).

[0051] Preferably, the temperature of the reaction is 70-105℃ (for example, it can be 70℃, 75℃, 80℃, 85℃, 90℃, 95℃, 100℃ or 105℃, etc.), and the time is 1-2h (for example, it can be 1h, 1.5h or 2h, etc.).

[0052] As a preferred technical solution of the application, the temperature of the reaction in the step (3) is 70-105℃ (for example, it can be 70℃, 75℃, 80℃, 85℃, 90℃, 95℃, 100℃ or 105℃, etc.), and the time is 3-5h (for example, it can be 3h, 3.5h, 4h, 4.5h or 5h, etc.).

[0053] It should be noted that the temperature of the reaction in the step (2) and the step (3) in the application can be consistent.

[0054] As a preferred technical solution of the application, the preparation method specifically comprises the following steps:

[0055] (1) mixing the (meth) acrylate containing a linear alkyl group with more than C14 and a solvent in a protective atmosphere to obtain a mixture;

[0056] (2) in a protective atmosphere, 70-90℃, drop (meth)acrylate containing C1-C6 alkyl, functional monomer and part of initiator into the reaction system obtained in step (1), the drop time is 2-5h, and the reaction is carried out at 70-105℃ for 1-2h to obtain a prepolymer;

[0057] (3) mix the silicon-containing monomer and the remaining initiator, and add them into the reaction system obtained in step (2), and the reaction is carried out at 70-105℃ for 3-5h to obtain the acrylic resin.

[0058] Compared with the prior art, the present application has the following beneficial effects:

[0059] The present application designs the raw materials for preparing the acrylic resin, and through the cooperation of various components, an acrylic resin with excellent performance is prepared, which has suitable weight average molecular weight, suitable polydispersity, high temperature resistance and high adhesion. BRIEF DESCRIPTION OF DRAWINGS

[0060] Figure 1 The infrared spectrum of the acrylic resin provided for example 1 of the present application;

[0061] Figure 2 The DSC curve of the acrylic resin provided for example 1 of the present application;

[0062] Figure 3 The viscoelasticity characterization-temperature scanning curve of the acrylic resin provided for example 1 of the present application. DETAILED DESCRIPTION

[0063] Examples 1-10, Comparative Examples 1-4

[0064] Examples 1-10, Comparative Examples 1-4 respectively provide an acrylic resin and a preparation method thereof, and the preparation raw materials of the acrylic resin are shown in Tables 1-2 below, and the amount of each preparation raw material component in Tables 1-2 is in parts by weight.

[0065] The preparation method of the acrylic resin is as follows:

[0066] (1) in a dry container, add solvent and (meth)acrylate containing C14 or more straight chain alkyl according to parts by weight, stir and heat to 66℃, and introduce nitrogen for 1.5 hours until the air is exhausted;

[0067] (2) under the constant temperature condition of 70℃ in nitrogen atmosphere, the (methyl) acrylate containing C1-C6 alkyl, functional monomer and part of the free radical initiator (50wt% of total free radical initiator) were mixed uniformly and continuously added into the reaction kettle, the dropping time was 2h, after the dropping was finished, the temperature was increased to 75℃ and the reaction was continued for 1h;

[0068] (3) the silicon-containing monomer and the remaining free radical initiator were added into the reaction system, the reaction was carried out at 80℃ for 5h, and the temperature was decreased to below 40℃, thus the acrylic resin was obtained.

[0069] Table 1

[0070]

[0071] Table 2

[0072]

[0073]

[0074] Comparative Example 5

[0075] The present comparative example provides an acrylic resin and a preparation method thereof, which is different from Example 1 only in that the preparation method of the acrylic resin is as follows:

[0076] (1) the solvent and the (methyl) acrylate containing linear alkyl group with more than C14 were added into a dry container, the temperature was increased to 66℃ while stirring, and nitrogen was introduced for 1.5h until the air was exhausted;

[0077] (2) under the constant temperature condition of 70℃ in nitrogen atmosphere, the (methyl) acrylate containing C1-C6 alkyl, functional monomer, silicon-containing monomer and free radical initiator were mixed uniformly and continuously added into the reaction kettle, the dropping time was 2h, after the dropping was finished, the temperature was increased to 75℃ and the reaction was continued for 6h, and the temperature was decreased to below 40℃, thus the acrylic resin was obtained.

[0078] The Fourier infrared spectrometer was used to characterize the acrylic resin provided by Example 1 of the present application, and the infrared spectrum thereof is shown in Figure 1 As shown in Figure 1 , the characteristic peak of carbonyl group of acrylic acid and methacrylic acid is at 1728cm -1 , there is no characteristic peak of C=C at 1640cm -1 , and the stretching vibration peak of Si-O bond is at 1117cm -1 , which indicates that the C=C of the silicon-containing monomer is all involved in the reaction, and the chemical bond of Si-O-C is generated by copolymerization, which indicates that the silicon-containing monomer and the acrylic ester form a copolymer.

[0079] The DSC curve of the acrylate resin provided by Example 1 of the present application was characterized using a differential scanning calorimeter, and the DSC curve thereof is shown in Figure 2 As can be seen from the DSC curve, Figure 2 the crystallization peak temperature of the acrylate resin is 40.6℃, and the melting peak temperature (T m ) is 52.2℃.

[0080] The viscoelasticity-temperature scanning curve of the acrylate resin provided by Example 1 of the present application was characterized using an instrument of the type DMA+100 of the manufacturer MTRAVIB in a shear mode, 0.15% strain, and a scanning frequency of 1 Hz from 20℃ to 140℃, and the test results are shown in Figure 3 As can be seen from the viscoelasticity-temperature scanning curve, Figure 3 the storage modulus of the acrylate resin is 3.6MPa at 40℃ and 0.1MPa at 45℃, indicating that the acrylate resin undergoes a phase transition at 40℃-45℃.

[0081] The properties of the acrylate resins provided by the above examples and comparative examples were characterized, and the specific characterization methods are as follows:

[0082] Solid content: GB / T 2793-1995;

[0083] Viscosity: GB / T 21059-2007;

[0084] Melting point (T m ): GB / T 13464-1992;

[0085] Weight average molecular weight, number average molecular weight, and polydispersity: GB / T 27843-2011

[0086] Adhesion: tested according to GB / T 9286-1998, the adhesion grade is from 0 to 5, 0 grade indicates the best adhesion, and 5 grade is the worst;

[0087] Temperature resistance: the acrylate resins provided by the above examples and comparative examples were coated on SUS plates and placed in a 120℃ oven (type DHG-9146A) for 12h, after being cooled to room temperature, the acrylate resins were peeled off, and whether there was residual glue was observed, if not, it was recorded as o, and if there was, it was recorded as x.

[0088] The above performance test methods are shown in Table 3:

[0089] Table 3

[0090]

[0091]

[0092] In Table 1, " / " represents that the data is not tested.

[0093] From the above, the present application designs the raw material of the acrylate resin, and further prepares the acrylate resin with excellent performance by the reaction of the (methyl) acrylate containing C14 linear alkyl group, the (methyl) acrylate containing C1-C6 alkyl group, the functional monomer and the silicon-containing monomer, and controls the amount of each component in a specific range. The acrylate resin has suitable weight average molecular weight and adaptive polydispersity, and higher temperature resistance and higher adhesion. The weight average molecular weight is 300-600 thousand, the polydispersity coefficient is 2.8-4.8, the melting point is 35-55℃, the adhesion grade is not less than 1 grade, and there is no residual glue after the temperature resistance test (120℃@12h).

[0094] From the contents of Example 1, Examples 9-10, Comparative Examples 1-2, the present application controls the amount of the silicon-containing monomer in a specific range, and prepares the acrylate resin with excellent performance, thereby improving the temperature resistance and adhesion of the acrylate resin.

[0095] From the contents of Example 1 and Comparative Examples 3-4, the present application selects the (methyl) acrylate containing C14 linear alkyl group as one of the raw materials for preparing the acrylate resin, and prepares the acrylate resin with suitable melting point.

[0096] From the contents of Example 1 and Comparative Example 5, the present application designs the preparation method of the acrylate resin, and further adjusts the adding sequence of the silicon-containing monomer, thereby preparing the acrylate resin with excellent performance, and making the acrylate resin have suitable weight average molecular weight, and improving the adhesion of the acrylate resin.

[0097] In summary, the present application designs the raw material of the acrylate resin, and further prepares the acrylate resin with excellent performance by the reaction of the (methyl) acrylate containing C14 linear alkyl group, the (methyl) acrylate containing C1-C6 alkyl group, the functional monomer and the silicon-containing monomer, and controls the amount of each component in a specific range. The acrylate resin has suitable weight average molecular weight and adaptive polydispersity, and higher temperature resistance and higher adhesion.

[0098] The applicant declares that the present application is illustrated by the above examples, but the present application is not limited to the above detailed process, that is, it does not mean that the present application must rely on the above detailed process to be implemented. It should be understood by those skilled in the art that any improvement of the present application, equivalent replacement of each raw material of the product of the present application, addition of auxiliary ingredients, selection of specific methods, etc. fall within the protection scope and disclosure scope of the present application.

Claims

1. A method for preparing an acrylate resin, characterized by, The preparation method comprises the following steps: (1) mixing (meth) acrylate containing C14 or more linear alkyl and solvent in a protective atmosphere to obtain a mixture; (2) adding (meth) acrylate containing C1-C6 alkyl, functional monomer and part of initiator into the reaction system obtained in step (1) in a protective atmosphere to carry out reaction, thereby obtaining a prepolymer; (3) mixing silicon-containing monomer and the remaining initiator, and adding into the reaction system obtained in step (2) to carry out reaction, thereby obtaining the acrylate resin; The raw materials for preparing the acrylate resin comprise the following components in weight fraction: (meth) acrylate containing C14 or more linear alkyl 35-55 parts; (meth) acrylate containing C1-C6 alkyl 35-55 parts; functional monomer 0.1-10 parts; silicon-containing monomer 0.5-3 parts; The functional monomer is selected from any one or combination of at least two of acrylic acid, hydroxyethyl acrylate, 4-hydroxybutyl acrylate or 2-hydroxypropyl acrylate; The silicon-containing monomer is selected from any one or combination of at least two of vinyl triisopropoxy silane, vinyl trimethoxy silane, vinyl triethoxy silane or vinyl tri(β-methoxyethoxy) silane.

2. The production method according to claim 1, characterized by, The adding method in step (2) comprises dropwise adding.

3. The preparation method according to claim 2, characterized in that, The temperature for dropwise adding in step (2) is 70-90℃, and the time is 2-5 h.

4. The method of claim 1, wherein, The temperature for reaction in step (2) is 70-105℃, and the time is 1-2 h.

5. The preparation method according to claim 1, characterized in that, The temperature for reaction in step (3) is 70-105℃, and the time is 3-5 h.

6. The method of claim 1, wherein, The preparation method specifically comprises the following steps: (1) mixing (meth) acrylate containing C14 or more linear alkyl and solvent in a protective atmosphere to obtain a mixture; (2) dropwise adding (meth) acrylate containing C1-C6 alkyl, functional monomer and part of initiator into the reaction system obtained in step (1) in a protective atmosphere at 70-90℃, the dropwise adding time is 2-5 h, and the reaction is carried out at 70-105℃ for 1-2 h, thereby obtaining a prepolymer; (3) mixing silicon-containing monomer and the remaining initiator, and adding into the reaction system obtained in step (2) to carry out reaction at 70-105℃ for 3-5 h, thereby obtaining the acrylate resin.

7. The preparation method according to claim 1, characterized in that, The (meth) acrylate containing C14 or more linear alkyl is selected from any one or combination of at least two of myristyl acrylate, cetyl acrylate, stearyl acrylate, arachidyl acrylate, behenyl acrylate, myristyl methacrylate, cetyl methacrylate, stearyl methacrylate, arachidyl methacrylate or behenyl methacrylate.

8. The method of claim 1, wherein, The (meth) acrylate containing C1-C6 alkyl is selected from any one or combination of at least two of methyl acrylate, ethyl acrylate, butyl acrylate, hexyl acrylate, methyl methacrylate, ethyl methacrylate, butyl methacrylate or hexyl methacrylate.

9. The method of claim 1, wherein, The raw materials for preparing the acrylate resin further comprise initiator 0.1-0.5 parts by weight.

10. The method of claim 9, wherein, The initiator comprises a free radical initiator.

11. The method of claim 10, wherein, The radical initiator is selected from any one or a combination of at least two of azobisisobutyronitrile, azobisisoheptyl nitrile, azobisisopentyl nitrile, benzoyl peroxide or tert-butyl peroxyl hexahydroterephthalate.

12. The method of claim 1, wherein, The raw material for preparing the acrylic ester resin further comprises a solvent 150-250 parts by weight.

13. The method of claim 12, wherein, The solvent is selected from any one or a combination of at least two of dimethyl carbonate, ethyl acetate, toluene, isopropyl alcohol, methyl acetate, methanol or butanone.

14. The method of claim 1, wherein, The solid content of the acrylic ester resin is 31-32%.

15. The method of claim 1, wherein, The viscosity of the acrylic ester resin is 10000-20000 mPa·s.

16. The method of claim 1, wherein, The weight average molecular weight of the acrylic ester resin is 300-600 thousand, and the polydispersity coefficient is 2.8-4.

8.

17. The method of claim 1, wherein, The melting point of the acrylic ester resin is 35-55℃.

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