A low volatile, low curing exothermic liquid acrylate thermoplastic resin and a preparation method thereof

Abstract

This invention discloses a low-volatility, low-heat-exothermic liquid acrylate thermoplastic resin, the preparation method of which includes the following steps: First, using methacrylate monomers and high UV-absorbing monomers as main raw materials, the resin is subjected to UV irradiation under heating and stirring conditions to obtain a photothermally activated modified liquid acrylate resin prepolymer; then, an oxygen inhibitor and acrylic monomers are added, and the mixture is heated and stirred to obtain the low-volatility, low-heat-exothermic liquid acrylate thermoplastic resin. This invention, by introducing methacrylate monomers and high UV-absorbing monomers, and utilizing UV light combined with heating to activate the prepolymer, enables uniform and controllable polymerization of the resin during subsequent room-temperature curing. This improves the processability of the liquid acrylate resin, reduces the volatility and heat release during curing, and effectively shortens the curing cycle, providing a new approach for the preparation of high-performance plastic resins.

Description

Technical Field

[0001] This invention belongs to the field of functional materials technology, specifically relating to a low-volatility, low-curing-exothermic liquid acrylate thermoplastic resin and its preparation method. Background Technology

[0002] Liquid acrylic thermoplastic resins, with their excellent mechanical properties, weather resistance, chemical stability, recyclability, and weldability, are widely used in resin-based composite materials, coatings, adhesives, and other fields. With the rapid development of these fields, the demand for liquid acrylic resins has increased significantly, demonstrating enormous market potential.

[0003] However, the preparation and molding technologies for liquid acrylate resins are still not mature enough. The inherent volatility and tendency to explode in existing resin systems severely hinder their further development and application. To address these issues, while maintaining the original excellent properties of liquid acrylate resins, it is crucial to reduce their volatility and heat of reaction through novel technologies to prepare low-volatility, low-heat-exothermic liquid acrylate thermoplastic resins. This is a key technical problem that urgently needs to be solved. Summary of the Invention

[0004] The main objective of this invention is to address the problems and shortcomings of existing technologies by providing a low-volatility, low-heat-exothermic liquid acrylate thermoplastic resin. This invention involves introducing a high-UV-absorption monomer to prepolymerize the resin using UV light and heat, achieving uniform and controllable prepolymerization. This significantly reduces the volatility and heat release during curing of the liquid acrylate resin, greatly improving its processability. Furthermore, the preparation method is relatively simple and energy-efficient, making it suitable for widespread application.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A method for preparing a low-volatility, low-curing-exothermic liquid acrylate thermoplastic resin includes the following steps:

[0007] 1) Preparation of photothermally activated modified acrylate resin prepolymers;

[0008] Methacrylate monomers and high UV-absorbing monomers were mixed and stirred evenly at room temperature under an inert atmosphere. Then, UV irradiation was carried out under heating and stirring conditions to obtain photoactivated modified liquid acrylate resin prepolymers.

[0009] 2) Preparation of low-volatility, low-curing-exothermic liquid acrylate resins;

[0010] The oxygen inhibitor and the acrylic monomer are added into the obtained photo-activated modified liquid acrylate resin prepolymer, stirred uniformly at room temperature, then heated and stirred, and cooled to obtain the low-volatile, low-curing exothermic liquid acrylate thermoplastic resin.

[0011] In the above scheme, the methacrylate monomer can be one or more of methyl methacrylate, hydroxyethyl methacrylate, ethyl methacrylate, etc.

[0012] In the above scheme, the high ultraviolet absorption monomer can be one or more of isobornyl methacrylate, butyl methacrylate, phenyl methacrylate, etc.

[0013] In the above scheme, the amount of the high ultraviolet absorption monomer is 5-20wt% of the mass of the methacrylate monomer; preferably 10-15wt%.

[0014] In the above scheme, the inert atmosphere can be nitrogen or the like.

[0015] In the above scheme, the stirring time in step 1) is 10-30min.

[0016] In the above scheme, the heating and stirring treatment in step 1) uses a temperature of 50-80℃ and a stirring rate of 100-300r / min.

[0017] In the above scheme, the ultraviolet irradiation in step 1) uses a wavelength of 200-390nm, a power of 200-400W, and a time of 2-8h.

[0018] Preferably, the heating temperature in step 1) is 50-65℃; the ultraviolet irradiation uses a wavelength of 220-365nm, a power of 300-400W, and a time of 2-4h; and the stirring rate is 200-300r / min.

[0019] In the above scheme, the oxygen inhibitor can be one or more of tetra(3-mercaptopropionic acid) pentaerythritol ester, p-hydroxyanisole, methylhydroquinone, etc.

[0020] In the above scheme, the amount of the oxygen inhibitor is 0.1-0.4wt% of the mass of the photo-activated modified liquid acrylate resin prepolymer; preferably 0.3-0.4wt%.

[0021] In the above scheme, the acrylic monomer can be one or more of acrylic acid, methacrylic acid, methyl acrylate, butyl acrylate, etc.

[0022] In the above scheme, the amount of the acrylic monomer is 10-30wt% of the mass of the photo-activated modified liquid acrylate resin prepolymer; preferably 20-25wt%.

[0023] In the above scheme, the stirring time at room temperature in step 2) is 10 to 30 minutes.

[0024] In the above scheme, the heating and stirring treatment in step 2) uses a temperature of 40-60℃, a stirring rate of 200-300 r / min, and a time of 0.5-2 h.

[0025] The low-volatility, low-curing-exothermic liquid acrylate resin prepared according to the above scheme has a prepolymer with a volatilization rate as low as 0.149–0.182 g / cm³ at 60°C. 2 When thermally initiated at room temperature, the highest exothermic temperature of the resin is 76.15–85.75°C, which is lower than the boiling point of the resin monomer, thus effectively preventing the occurrence of explosive polymerization.

[0026] The present invention also provides a molding method for the above-mentioned low-volatility, low-curing-exothermic liquid acrylate thermoplastic resin, comprising the following steps: adding a curing agent and an accelerator to the low-volatility, low-curing-exothermic liquid acrylate thermoplastic resin, stirring at room temperature, vacuum degassing, casting, and curing at room temperature to obtain the acrylate thermoplastic resin molded product.

[0027] Furthermore, the curing agent is an organic peroxide initiator, specifically one or more of benzoyl peroxide, dicumyl peroxide, tert-butyl peroxide, etc.

[0028] Furthermore, the accelerator may be one or more of N,N-dimethylaniline, 2,4,6-tris(dimethylaminomethyl)phenol, triethanolamine, etc.

[0029] In the above scheme, the amount of curing agent is 0.1 to 0.4 wt% of the mass of liquid acrylate thermoplastic resin, preferably 0.2 to 0.3 wt%; the amount of accelerator is 0.03 to 0.085 wt% of the mass of liquid acrylate thermoplastic resin, preferably 0.043 to 0.06 wt%.

[0030] In the above scheme, the room temperature is 25-30℃ and the stirring time is 20-30 min.

[0031] In the above scheme, the vacuum degassing uses a vacuum degree of -0.04 to -0.08 MPa and a holding time of 5 to 20 minutes.

[0032] Preferably, the vacuum degree is -0.06 to -0.08 MPa, and the vacuum is maintained for 5 to 10 minutes.

[0033] In the above scheme, the room temperature curing temperature is 20-35℃ and the time is 3-5h.

[0034] Preferably, the room temperature curing temperature is 25-30℃ and the time is 3-4 hours.

[0035] The principle of this invention is as follows:

[0036] This invention involves adding high UV-absorbing monomers such as isobornyl methacrylate, butyl methacrylate, and phenyl methacrylate. By utilizing UV light combined with applied temperature to activate these monomers, their unsaturated bonds break, generating a large number of active free radicals. This transforms the monomers into macromolecular oligomers, and the resin undergoes uniform and controllable polymerization during subsequent room-temperature curing. This effectively improves the processability of liquid acrylate resins, reduces the volatility and heat release during curing, and shortens the curing cycle, thus achieving the efficient preparation of low-volatility, low-heat-exothermic liquid acrylate resins.

[0037] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0038] 1) This invention first uses methacrylate monomers and high UV-absorbing monomers as main raw materials, and then irradiates them with ultraviolet light under heating and stirring conditions to obtain photo- and heat-activated modified liquid acrylate resin prepolymers. This can effectively reduce the volatilization rate and curing exothermic temperature of the obtained resin system, avoid problems such as explosive polymerization, and greatly improve the processability of liquid acrylate resins, effectively broadening their application fields.

[0039] 2) The low-volatility, low-curing-exothermic liquid acrylate thermoplastic resin described in this invention can achieve uniform and controllable polymerization of the resin during subsequent room temperature curing, and can effectively shorten the curing cycle; and is beneficial to improving the strength and toughness of the obtained cured resin products, which can provide a new idea for the preparation of high-performance acrylate-based thermoplastic resins.

[0040] 3) The preparation method involved in this invention is relatively simple, easy to operate, and has mild reaction conditions, making it suitable for widespread application. Attached Figure Description

[0041] Figure 1 This is a comparison chart of the volatilization rates at 60°C between the photothermally activated modified liquid thermoplastic resin prepolymer obtained in Example 1 and the conventional liquid acrylate resin described in Comparative Example 1.

[0042] Figure 2 XPS spectra of C1s of the photothermally activated modified liquid thermoplastic resin prepolymer obtained in Example 1 and the conventional liquid acrylate resin described in Comparative Example 1.

[0043] Figure 3 The images show the morphology of the photothermally activated modified liquid thermoplastic resin prepolymer obtained in Example 1 and the conventional liquid acrylate resin described in Comparative Example 1 after curing.

[0044] Figure 4The curing exothermic curves are those of the photothermally activated modified liquid thermoplastic resin prepolymer obtained in Example 1 and the conventional liquid acrylate resin described in Comparative Example 1.

[0045] Figure 5 The mechanical properties of the photothermally activated modified liquid thermoplastic resin prepolymer obtained in Example 1 and the conventional liquid acrylate resin described in Comparative Example 1 are compared. Detailed Implementation

[0046] To more clearly and comprehensively demonstrate the advantages of the present invention, the invention is further described in detail through the following specific embodiments and accompanying drawings. The specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of protection of the invention. After reading this invention, any modifications of the invention by those skilled in the art in various equivalent forms fall within the scope defined by the appended claims.

[0047] In the following embodiments, the preparation method of the liquid acrylate thermoplastic resin includes the following steps:

[0048] 1) Preparation of photothermally activated modified acrylate resin prepolymers:

[0049] 100g of methacrylate monomers were added to a three-necked flask, followed by 5-20wt% (percentage of the methacrylate monomer mass, the same below) of a high UV-absorbing monomer. A nitrogen atmosphere was introduced into the flask, and the mixture was stirred at room temperature for 10-30 minutes. Then, the flask was placed under a UV lamp (wavelength 200-390nm, power 200-400W) and irradiated at 50-80℃ with stirring (100-300r / min) for 2-8 hours to obtain a photoactivated modified liquid acrylate resin prepolymer. The methacrylate monomers were one or a mixture of methyl methacrylate, hydroxyethyl methacrylate, and ethyl methacrylate; the high UV-absorbing monomers were one or a mixture of isobornyl methacrylate, butyl methacrylate, and phenyl methacrylate.

[0050] 2) Preparation of low-volatility, low-curing-exothermic liquid acrylate resins:

[0051] Add 0.1–0.4 wt% (percentage of prepolymer mass, the same below) of an oxygen inhibitor and 10–30 wt% (percentage of prepolymer mass, the same below) of acrylic monomers to the photoactivated modified liquid acrylate resin prepolymer prepared in step one. First, stir at room temperature for 10–30 min, then place in a water bath at 40–60°C and stir (200–300 r / min) for 0.5–2 h to ensure that all components are fully mixed and homogeneous. Allow to cool to room temperature to obtain a low-volatility, low-curing-exothermic liquid acrylate resin. The oxygen inhibitor is one or a mixture of several of pentaerythritol tetrakis(3-mercaptopropionic acid), p-hydroxyanisole, and methyl hydroquinone. The acrylic monomers are one or a mixture of several of acrylic acid, methacrylic acid, methyl acrylate, and butyl acrylate.

[0052] The room temperature curing and molding step of the liquid acrylate resin includes:

[0053] Add 0.1–0.4 wt% (by weight of the acrylate resin) of benzoyl peroxide (BPO) and 0.03–0.085 wt% (by weight of the acrylate resin) of N,N-dimethylaniline to the obtained liquid acrylate resin. Stir at 25–30°C for 20–30 min. Place the mixture in a vacuum chamber and evacuate it to a vacuum gauge pressure of -0.04–-0.08 MPa. Maintain this pressure for 5–20 min to remove air bubbles from the resin. Then pour the mixture into a mold or combine it with fiber-reinforced materials. Place the mixture in an oven at 20–35°C for curing for 3–5 h. Demold the mixture to obtain a resin casting or a fiber-reinforced acrylate resin composite material.

[0054] Example 1

[0055] A method for preparing a low-volatility, low-curing-exothermic liquid acrylate thermoplastic resin includes:

[0056] 1) Preparation of photothermally activated modified acrylate resin prepolymers:

[0057] 100g of methyl methacrylate was added to a three-necked flask, followed by 10wt% (percentage of the methacrylate monomer mass) of isobornyl methacrylate. Nitrogen atmosphere was introduced into the flask, and the mixture was stirred at room temperature for 20min. Then, the flask was placed under a UV lamp (using both 295nm and 365nm wavelengths, with a power of 300W) and irradiated at 60℃ with a stirring rate of 200r / min for 4h to obtain a photoactivated modified liquid acrylate resin prepolymer.

[0058] 2) Preparation of low-volatility, low-curing-exothermic liquid acrylate resins:

[0059] To the obtained photoactivated modified liquid acrylate resin prepolymer, add 0.4 wt% of the oxygen inhibitor pentaerythritol tetrakis(3-mercaptopropionic acid) and 25 wt% of acrylic acid. First, stir at room temperature for 30 min to ensure that the components are fully mixed and homogeneous. Then, place it in a 60°C water bath and stir for 1 h. After being placed at room temperature, a low-volatility, low-curing-exothermic liquid acrylate resin is obtained.

[0060] Application Example 1

[0061] Add 0.2 wt% benzoyl peroxide and 0.043 wt% N,N-dimethylaniline to the obtained liquid acrylate resin, stir at 25°C for 30 min, place it in a vacuum device, evacuate to a vacuum gauge pressure of -0.08 MPa, maintain for 10 min to remove air bubbles in the resin, then pour it into a mold, place it in a 25°C environment to cure for 4 h, and demold to obtain the resin casting.

[0062] Application Example 2

[0063] Add 0.2 wt% benzoyl peroxide and 0.043 wt% N,N-dimethylaniline to the obtained liquid acrylic resin. Stir at 25°C for 30 min. Place the mixture in a vacuum chamber and evacuate to a vacuum gauge pressure of -0.08 MPa. Maintain this pressure for 10 min to remove air bubbles from the resin. Then, impregnate the glass fiber with the resin at a resin:glass fiber mass ratio of 1:1. Place the mixture between two glass plates and cure at 25°C for 4 h. Demold to obtain thermoplastic glass fiber prepreg.

[0064] Example 2

[0065] A method for preparing a low-volatility, low-curing-exothermic liquid acrylate thermoplastic resin includes:

[0066] 1) Preparation of photothermally activated modified acrylate resin prepolymers:

[0067] 60g of methyl methacrylate and 40g of hydroxyethyl methacrylate were added to a three-necked flask, followed by the addition of 10wt% of phenyl methacrylate. Nitrogen atmosphere was introduced into the flask, and the mixture was stirred at 30°C for 20 min. The flask was then placed under a UV lamp (using both 295nm and 365nm wavelengths, with a power of 300W) and irradiated at 60°C with a stirring rate of 200r / min for 4 h to obtain a photoactivated modified liquid acrylate resin prepolymer.

[0068] 2) Preparation of low-volatility, low-curing-exothermic liquid acrylate resins:

[0069] 0.4 wt% of an oxygen inhibitor (a mixture of pentaerythritol tetrakis(3-mercaptopropionic acid) and p-hydroxyanisole in a mass ratio of 7:3) and 25 wt% of an acrylic monomer (a mixture of acrylic acid and ethyl acrylate in a mass ratio of 8:2) were added to the obtained photoactivated modified liquid acrylate resin prepolymer. The mixture was first stirred at room temperature for 30 min to ensure that the components were fully mixed and homogeneous. Then it was placed in a 60°C water bath and stirred for 1 h. After being placed at room temperature, a low-volatility, low-curing-exothermic liquid acrylate resin was obtained.

[0070] Add 0.2 wt% benzoyl peroxide and 0.043 wt% N,N-dimethylaniline to the obtained liquid acrylate resin, stir at 25°C for 30 min, place it in a vacuum device, evacuate to a vacuum gauge pressure of -0.08 MPa, maintain for 10 min to remove air bubbles in the resin, then pour it into a mold, place it in a 25°C environment to cure for 4 h, and demold to obtain the resin casting.

[0071] Example 3

[0072] A method for preparing a low-volatility, low-curing-exothermic liquid acrylate thermoplastic resin includes:

[0073] 1) Preparation of photothermally activated modified acrylate resin prepolymers:

[0074] 100g of methyl methacrylate was added to a three-necked flask, followed by 10wt% (percentage of the methacrylate monomer mass) of isobornyl methacrylate. Nitrogen atmosphere was introduced into the flask, and the mixture was stirred at room temperature for 20min. Then, the flask was placed under a UV lamp (wavelength 365nm, power 300W) and irradiated at 60℃ with a stirring rate of 200r / min for 5h to obtain a photoactivated modified liquid acrylate resin prepolymer.

[0075] 2) Preparation of low-volatility, low-curing-exothermic liquid acrylate resins:

[0076] To the obtained photoactivated modified liquid acrylate resin prepolymer, add 0.4 wt% of the oxygen inhibitor pentaerythritol tetrakis(3-mercaptopropionic acid) and 25 wt% of acrylic acid. First, stir at room temperature for 30 min to ensure that the components are fully mixed and homogeneous. Then, place it in a 60°C water bath and stir for 1 h. After being placed at room temperature, a low-volatility, low-curing-exothermic liquid acrylate resin is obtained.

[0077] Add 0.2 wt% benzoyl peroxide and 0.043 wt% N,N-dimethylaniline to the obtained liquid acrylate resin, stir at 25°C for 30 min, place it in a vacuum device, evacuate to a vacuum gauge pressure of -0.08 MPa, maintain for 10 min to remove air bubbles in the resin, then pour it into a mold, place it in a 25°C environment to cure for 4 h, and demold to obtain the resin casting.

[0078] Comparative Example 1

[0079] A conventional liquid acrylate resin is prepared in a manner similar to that of Example 1, except that the initiator benzoyl peroxide and N,N-dimethylaniline are directly added to the resin monomer mixture solution for curing, without the photothermal activation modification described in step 1).

[0080] The volatilization rates at 60°C of the photothermally activated modified liquid thermoplastic resin prepolymer obtained in Example 1 and the conventional liquid acrylate resin obtained in Comparative Example 1 are compared. Figure 1 As shown, the results indicate that the volatilization rate of photothermally activated acrylate resin prepolymer is significantly lower than that of traditional liquid acrylate resin prepolymer. This suggests that the photothermally activated modified resin prepolymer can reduce the volatilization of small molecules during the subsequent curing process, which can not only improve the utilization rate of monomers, but also effectively avoid problems such as volume shrinkage and bubble introduction caused by monomer volatilization during the curing process, thus effectively ensuring the curing effect.

[0081] XPS spectra of C1s in the products obtained after curing the photothermally activated modified liquid thermoplastic resin prepolymer of Example 1 and the conventional liquid acrylate resin of Comparative Example 1 are shown below. Figure 2 As shown, the results indicate that the binding energies of COC and C=O increase from 286 eV and 288.9 eV to 286.4 eV and 289 eV with increasing photoactivation time, representing increases of 0.4 eV and 0.1 eV, respectively. This indicates a decrease in the electron cloud density around the COC and C=O bonds. Therefore, ultraviolet light can activate the copolymerization of isobornyl methacrylate with acrylate resin matrices, causing the bulky side groups on isobornyl methacrylate to attach to the polymer backbone, thereby reducing the electron cloud density around the C atoms.

[0082] The morphology images of the products obtained after curing the photothermally activated modified liquid thermoplastic resin prepolymer obtained in Example 1 and the conventional liquid acrylate resin obtained in Comparative Example 1 are shown below. Figure 3 As shown, by Figure 3 It can be seen that the unactivated resin exhibits obvious burst polymerization, while the photothermally activated resin does not exhibit burst polymerization, indicating that photothermal activation can significantly improve the burst polymerization phenomenon during resin curing.

[0083] The curing exothermic curves of the photothermally activated modified liquid thermoplastic resin prepolymer obtained in Example 1 and the conventional liquid acrylate resin described in Comparative Example 1 are shown below. Figure 4 As can be seen, the highest exothermic temperature of the unactivated resin during thermal initiation at room temperature is 117.8℃, and the curing process takes 5 to 6 hours to complete. The resin treated with photothermal activation according to the present invention, under the same amount of initiator, has a highest exothermic temperature of 76.15℃ during thermal initiation at room temperature, which is 41.65℃ lower than that of the unactivated resin. This temperature is lower than the boiling point of the resin monomer, which can effectively alleviate the potential self-acceleration effect that may occur during polymerization, greatly reduce the risk of explosive polymerization, and significantly shorten the required curing time.

[0084] The mechanical property test results of the photothermally activated modified liquid thermoplastic resin obtained in Example 1 and the conventional liquid acrylate resin described in Comparative Example 1 are shown in the figure. Figure 5 As can be seen, the mechanical properties of the photothermally activated modified liquid thermoplastic resin are significantly improved. Compared with traditional liquid acrylate resins, its tensile strength is increased by 68.85%, flexural strength by 59.97%, and impact toughness by 34.34%. The photothermally activated modified liquid thermoplastic resin of this invention cures more completely, reducing or eliminating the impact of residual stress caused by excessively high curing exothermic temperatures on mechanical properties. Therefore, it can meet the mechanical property requirements of resin products in most application scenarios without the need for post-curing annealing.

[0085] Comparative Example 2

[0086] A liquid acrylate resin is prepared in a manner similar to that of Example 1, except that 35 wt% PMMA is first added to the resin monomer mixture solution to dissolve it and increase its initial viscosity, and then benzoyl peroxide and N,N-dimethylaniline, the same initiators as in Example 1, are added for curing, without performing the heating-photoactivation modification described in step 1).

[0087] The evaporation rate of the resin of the pre-dissolved polymer obtained in Comparative Example 2 was 0.211–0.234 g / cm³. 2 The highest exothermic temperature of curing is 109.92℃. During the curing process, explosive polymerization is prone to occur, which pollutes the environment and makes it difficult to control the quality of the product.

[0088] Comparative Example 3

[0089] A liquid acrylate resin is prepared in a manner similar to that of Example 1, except that in step 1), the resin is irradiated under ultraviolet light and stirring conditions, and the simultaneous heating treatment described in step 1) is not performed.

[0090] The highest exothermic curing temperature of the modified acrylate resin obtained in Comparative Example 3 was 99.72°C, which posed a certain risk of explosive polymerization. Furthermore, the mechanical properties of the resulting resin casting were lower than those of the photothermally activated modified liquid thermoplastic resin obtained in Example 1.

[0091] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0092] The above description is merely an example and illustration of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A method for preparing a low-volatility, low-curing-exothermic liquid acrylate thermoplastic resin, characterized in that, Includes the following steps: 1) Mix methacrylate monomers and high UV-absorbing monomers, stir evenly at room temperature under an inert atmosphere, and then irradiate with UV light under heating and stirring conditions to obtain photoactivated modified liquid acrylate resin prepolymers; 2) Add oxygen inhibitor and acrylic monomer to the obtained photoactivated modified liquid acrylate resin prepolymer, stir evenly at room temperature, then heat and stir, and cool to obtain the low volatility, low curing exothermic liquid acrylate thermoplastic resin. The methacrylate monomers are one or more of methyl methacrylate, hydroxyethyl methacrylate, and ethyl methacrylate; The high UV absorption monomer is one or more of isobornyl methacrylate and phenyl methacrylate; The acrylic monomer is one or more of acrylic acid, methacrylic acid, methyl acrylate, and butyl acrylate; The heating and stirring conditions described in step 1) use a temperature of 50~80℃.

2. The preparation method according to claim 1, characterized in that, Step 1) The ultraviolet irradiation used a wavelength of 200~390nm, a power of 200~400W, and a time of 2~8h.

3. The preparation method according to claim 1, characterized in that, The oxygen inhibition agent is one or more of pentaerythritol tetrakis(3-mercaptopropionic acid), p-hydroxyanisole, and methyl hydroquinone.

4. The preparation method according to claim 1, characterized in that, In step 2), the heating and stirring process is carried out at a temperature of 40~60℃ for 0.5~2h.

5. The low-volatility, low-curing-exothermic liquid acrylate thermoplastic resin prepared by the preparation method according to any one of claims 1 to 4, characterized in that, Its prepolymer exhibits a volatilization rate as low as 0.149~0.182 g / cm³ at 60°C. 2 When thermally initiated at room temperature, the highest exothermic temperature for curing of ·h is 76.15~85.75℃.

6. The molding method of the low-volatility, low-curing-exothermic liquid acrylate thermoplastic resin according to claim 5, characterized in that, The process includes the following steps: adding a curing agent and an accelerator to a low-volatility, low-curing-exothermic liquid acrylic thermoplastic resin, stirring at room temperature, vacuum degassing, pouring, and curing at room temperature to obtain an acrylic thermoplastic resin molded product.

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