A photocurable resin composition and a photocurable product

Abstract

The present invention provides a photocurable resin composition and a photocurable product. The photocurable resin composition comprises the following components in parts by weight: 26-75 parts of polyether polyurethane acrylate, 20-80 parts of acrylate monomers, 1-5 parts of photoinitiators, 0.001-0.1 parts of triazine ultraviolet absorbers, and 0.01-1 parts of stabilizers. The photocurable product is obtained by 3D printing and ultraviolet curing of the photocurable resin composition. The photocurable resin composition provided by the present invention can eliminate the diffusion of overcuring and dark reactions, so that the printed products have higher printing accuracy.

Description

Technical Field

[0001] The invention belongs to the technical field of photocurable materials, and in particular relates to a photocurable resin composition and a photocurable product. Background Art

[0002] Photocuring 3D printing technology is a manufacturing technology that uses the energy of near-ultraviolet light sources to excite free radicals to cause polymerization reactions to manufacture products. Generally, products are manufactured by layer-by-layer stacking. Due to its ability to quickly shape, photocuring 3D printing technology can greatly increase product design freedom and greatly shorten the time and cost from design to manufacturing. At the same time, the products produced do not require unnecessary cutting, grinding and surface treatment, and are widely used in fields such as dentistry.

[0003] The core of photocurable 3D printing is photocurable resin, which stimulates the initiator to produce free radicals through the light source to cause the polymerization of monomers and oligomers to form and solidify. The photocurable resin needs to match the light source and mechanical system of the 3D printing system to achieve the precision and speed requirements of manufacturing. At the same time, the resin needs to be able to meet the thermodynamic and mechanical properties required by the application to ensure the stability of the material during use, and also meet various special performance requirements such as biology, odor, and environmental pollution.

[0004] The printing accuracy of transparent resin materials is mainly affected by over-curing and dark reaction diffusion. The over-curing in the light projection direction due to the light energy passing through the forming part affects the printing accuracy in the z-axis direction, while the diffusion of free radicals induced by light will cause the printing accuracy in the xy plane to decrease.

[0005] Transparent dental pad 3D printing is a new technology and an emerging application in dental applications. However, the current photocurable resin system used in this field has the disadvantages of serious over-curing, poor printing accuracy, slow photocurable 3D printing speed, cumbersome post-processing process, difficult to clean resin residue, bitter taste, strong residual odor, and product mechanical properties that do not meet application requirements. Therefore, it is necessary to develop a 3D printing photocurable resin system suitable for transparent dental pad products. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention aims to provide a photocurable resin composition and a photocurable product. The photocurable resin composition can eliminate the overcuring phenomenon and the diffusion of dark reaction, so that the printed product has higher printing accuracy.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] In a first aspect, the present invention provides a photocurable resin composition comprising the following components in parts by weight:

[0009]

[0010] In the present invention, when the photocurable resin composition is used for 3D printing, the triazine ultraviolet absorber can eliminate over-curing in the vertical direction, and the stabilizer can eliminate the diffusion of the dark reaction, and the two cooperate with each other to improve the printing accuracy.

[0011] Using triazine UV absorbers alone without stabilizers will lead to dark reaction diffusion, and using stabilizers alone will not eliminate the effect of overcuring. If the amount of either is too low, it will not be enough to eliminate the loss of printing accuracy caused by overcuring and diffusion effects. Adding too much triazine UV absorbers will increase the light intensity required for exposure and thus affect the polymerization reaction, and adding too much stabilizer will reduce the mechanical properties of the product.

[0012] In some embodiments of the present invention, the photocurable resin composition comprises the following components in parts by weight:

[0013]

[0014] Wherein, the Shore D hardness of the high-hardness polyether polyurethane acrylate is ≥60;

[0015] The elongation at break of the high-elastic polyether polyurethane acrylate is ≥60%.

[0016] The photocurable resin composition obtained by the present invention has the advantages of low viscosity and high reaction speed by further optimizing the types of polymer components and monomer components, and can further improve the impact strength, toughness and surface hardness of products printed by the photocurable resin composition, and make the products have the advantages of easy cleaning, no odor residue and no taste in the mouth.

[0017] In the present invention, the weight proportion of the high hardness polyether polyurethane acrylate can be 25 parts, 26 parts, 28 parts, 30 parts, 32 parts, 35 parts, 38 parts, 40 parts, 42 parts, 45 parts, 48 ​​parts, 50 parts, 52 parts or 55 parts.

[0018] The Shore D hardness of the high-hardness polyether polyurethane acrylate may be 60, 62, 65, 68, 70, 72, 75, 78, 80, 82 or 85, etc.

[0019] The weight proportions of the high elastic polyether polyurethane acrylate can be 1 part, 2 parts, 3 parts, 5 parts, 6 parts, 8 parts, 10 parts, 12 parts, 13 parts, 15 parts, 16 parts, 18 parts or 20 parts, etc.

[0020] The elongation at break of the high elastic polyether polyurethane acrylate may be 60%, 65%, 70%, 75%, 80%, 85%, 90%, 100%, 110%, 120%, 130%, 140% or 150%, etc.

[0021] The weight proportions of the acrylic hard monomer may be 15 parts, 18 parts, 20 parts, 22 parts, 25 parts, 28 parts, 30 parts, 32 parts, 35 parts, 38 parts, 40 parts, 42 parts or 45 parts, etc.

[0022] The weight proportions of the acrylic soft monomer may be 5 parts, 8 parts, 10 parts, 12 parts, 15 parts, 18 parts, 20 parts, 22 parts, 25 parts, 28 parts, 30 parts, 32 parts or 35 parts, etc.

[0023] The weight proportions of the photoinitiator can be 1 part, 1.5 parts, 2 parts, 2.2 parts, 2.5 parts, 2.8 parts, 3 parts, 3.2 parts, 3.5 parts, 3.8 parts, 4 parts, 4.5 parts or 5 parts, etc.

[0024] The weight proportion of the triazine ultraviolet absorber can be 0.001 part, 0.003 part, 0.005 part, 0.008 part, 0.01 part, 0.012 part, 0.015 part, 0.018 part, 0.02 part, 0.03 part, 0.05 part, 0.06 part, 0.08 part or 0.1 part, etc.

[0025] The weight proportion of the stabilizer can be 0.01 part, 0.02 part, 0.03 part, 0.05 part, 0.08 part, 0.1 part, 0.15 part, 0.2 part, 0.25 part, 0.3 part, 0.5 part, 0.6 part, 0.8 part or 1 part, etc.

[0026] In some embodiments of the present invention, the photocurable resin composition comprises the following components in parts by weight:

[0027]

[0028] Wherein, the Shore D hardness of the high-hardness polyether polyurethane acrylate is ≥60;

[0029] The elongation at break of the high-elastic polyether polyurethane acrylate is ≥60%.

[0030] By further optimizing the dosage of each component, it is helpful to further improve the photocurable resin composition and the products printed therefrom.

[0031] In some embodiments of the present invention, the acrylate hard monomer is selected from one or more of 4-acryloylmorpholine, dicyclopentadiene acrylate, isobornyl methacrylate, benzyl methacrylate, 2-phenoxyethyl acrylate and 2-hydroxyethyl methacrylate.

[0032] In some embodiments of the present invention, the acrylic ester soft monomer is selected from one or more of cyclotrimethylolpropane formal acrylate, trimethylcyclohexyl acrylate, 4-tert-butylcyclohexyl acrylate, hydroxybutyl acrylate, ethoxyethoxyethyl acrylate and tetrahydrofurfuryl alcohol acrylate.

[0033] In some embodiments of the present invention, the photoinitiator is selected from 1-hydroxy-cyclohexyl-phenyl ketone, phenyl bis(2,4,6-trimethylbenzoyl)phosphine oxide (photoinitiator 819), 2-methyl-1-[4-(methylthio)phenyl]-2-morpholinyl-1-propanone, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, isopropylthioxanthone (2,4 isomer mixture), 2-hydroxy-2-methyl-1-phenyl-1-propanone, η6-isopropylphenylferrocene hexafluorophosphate (UV-261), 4-isobutylphenyl-4'-methylphenyliodonium hexafluorophosphate (Omnicat 250) and diphenyl-(4-phenylthio)phenylsulfonium hexafluoroantimonate (UV-6976). One or more.

[0034] In some embodiments of the present invention, the triazine ultraviolet absorber is selected from one or more of UV1990 (produced by Eutec Chemical), 2,4,6-tris(2'-hydroxy-4'-n-butoxyphenyl) (triazine-5), 2,4-bis(2,4-xylyl)-6-(2-hydroxy-4-n-octyloxyphenyl)-1,3,5-triazine (UV1164), 2-(4,6-diphenyl-1,3,5-triazine-2)-5-n-hexyloxyphenol (UV1577), 2,4-bis((4-(2-ethyl-hexyloxy) 2-hydroxy)-phenyl) 6-(4-methoxyphenyl)-1,3,5-triazine (UV627) and UV1600 (produced by OMNISTAB).

[0035] In some embodiments of the present invention, the stabilizer is selected from one or more of tert-butylbenzoquinone, 6-tert-butyl-2,4-dimethylphenol, p-hydroxyanisole and N-nitroso-N-phenylhydroxylamine salt.

[0036] In some embodiments of the present invention, the photocurable resin composition further comprises an antioxidant.

[0037] In some embodiments of the present invention, the weight fraction of the antioxidant is 0.01-1 part, for example, it can be 0.01 part, 0.02 part, 0.03 part, 0.05 part, 0.08 part, 0.1 part, 0.15 part, 0.2 part, 0.25 part, 0.3 part, 0.5 part, 0.6 part, 0.8 part or 1 part, etc.; preferably 0.05-0.3 part.

[0038] In some embodiments of the present invention, the antioxidant is selected from one or more of tea polyphenols, tocopherol, butylated hydroxytoluene, butylated hydroxyanisole, tert-butylhydroquinone, tris(2,4-di-tert-butylphenyl)phosphite, pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate (antioxidant 1010) and N,N'-bis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hydrazine (antioxidant 1024).

[0039] In a second aspect, the present invention provides a photocurable product obtained by 3D printing and UV curing the photocurable resin composition described in the first aspect.

[0040] In some embodiments of the present invention, the power of the ultraviolet light is 1.5-300 mW / cm 2 ; For example, it can be 1.5mW / cm 2 , 2mW / cm 2 , 4mW / cm 2 、6mW / cm 2 , 8mW / cm 2 、10mW / cm 2 , 20mW / cm 2 、30mW / cm 2 、50mW / cm 2 、80mW / cm 2 , 100mW / cm 2 、150mW / cm 2 , 200mW / cm 2 、250mW / cm 2 or 300mW / cm 2 wait.

[0041] In some embodiments of the present invention, the wavelength of the ultraviolet light is 280-420nm, for example, it can be 280nm, 290nm, 300nm, 310nm, 320nm, 330nm, 350nm, 360nm, 380nm, 400nm, 405nm, 410nm or 420nm, etc.; preferably 380-405nm.

[0042] In some embodiments of the present invention, the photocurable product is a transparent dental pad.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] The photocurable resin composition provided by the present invention eliminates the over-curing phenomenon and the diffusion of dark reactions during 3D printing by using a triazine ultraviolet absorber in combination with a stabilizer, thereby synergistically improving the printing accuracy of the product.

[0045] The present invention further optimizes the types of polymer components and monomer components so that the obtained photocurable resin composition has the characteristics of low viscosity, high reaction speed and low skin irritation. The printed product has the advantages of high impact strength, high toughness, high surface hardness, easy cleaning, no odor residue, and no taste in the mouth. It is suitable for preparing transparent tooth pad products. DETAILED DESCRIPTION

[0046] The technical solution of the present invention is further described below by means of specific implementation methods. It should be understood by those skilled in the art that the specific implementation methods are only used to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0047] In the embodiments of the present invention, the sources of some raw materials are as follows:

[0048] High hardness polyether polyurethane acrylate: BR-970BT from Dymax, Shore hardness 77D;

[0049] Highly elastic polyether polyurethane acrylate: BR640D from Dymax, with an elongation at break of 190%.

[0050] Example 1

[0051] This embodiment provides a photocurable resin composition and a tooth pad;

[0052] Among them, the preparation method of the photocurable resin composition is: 30 parts of high hardness polyether polyurethane acrylate, 10 parts of high elasticity polyether polyurethane acrylate, 30 parts of isobornyl methacrylate, 30 parts of ethoxyethoxyethyl acrylate, 4 parts of 2-methyl-1-[4-(methylthio)phenyl]-2-morpholinyl-1-propanone, 0.01 parts of UV1577, 0.2 parts of p-hydroxyanisole and 1 part of butylated hydroxyanisole are mixed in a mixing kettle, and stirred at a speed of 1000 rpm for 3 hours to form a solution, which is the photocurable resin composition.

[0053] The preparation method of the dental pad is as follows: the photocurable resin composition obtained in this embodiment is subjected to ultraviolet light with a power of 4 mW / cm 2 , 3D printing and curing under the condition of UV wavelength of 405nm, and then under the condition of UV power of 50mW / cm 2, post-curing treatment was carried out under the condition of ultraviolet light wavelength of 405nm for 10min, and then the stress was released by standing for 24h to obtain a dental pad product.

[0054] Example 2

[0055] This embodiment provides a photocurable resin composition and a tooth pad;

[0056] The preparation method of the photocurable resin composition is as follows: 25 parts of high-hardness polyether polyurethane acrylate, 20 parts of high-elasticity polyether polyurethane acrylate, 30 parts of isobornyl methacrylate, 30 parts of ethoxyethoxyethyl acrylate, 2 parts of phenyl bis(2,4,6-trimethylbenzoyl)phosphine oxide, 0.02 parts of UV1164, 0.5 parts of tert-butylbenzoquinone and 0.5 parts of dibutylhydroxytoluene are mixed in a mixing kettle, and stirred at 800 rpm for 4 hours to form a solution, which is the photocurable resin composition.

[0057] The preparation method of the dental pad is as follows: the photocurable resin composition obtained in this embodiment is subjected to ultraviolet light with a power of 4 mW / cm 2 , 3D printing and curing under the condition of UV wavelength of 405nm, and then under the condition of UV power of 50mW / cm 2 , post-curing treatment was carried out under the condition of ultraviolet light wavelength of 405nm for 10min, and then the stress was released by standing for 24h to obtain a dental pad product.

[0058] Example 3

[0059] This embodiment provides a photocurable resin composition and a tooth pad;

[0060] Among them, the preparation method of the photocurable resin composition is: 35 parts of high hardness polyether polyurethane acrylate, 8 parts of high elasticity polyether polyurethane acrylate, 30 parts of isobornyl methacrylate, 20 parts of 4-tert-butylcyclohexyl acrylate, 4 parts of 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, 0.001 parts of UV1577, 0.01 parts of p-hydroxyanisole and 1 part of butylated hydroxyanisole are mixed in a mixing kettle, and stirred at 800 rpm for 4 hours to form a solution, which is the photocurable resin composition.

[0061] The preparation method of the dental pad is as follows: the photocurable resin composition obtained in this embodiment is subjected to ultraviolet light with a power of 4 mW / cm 2 , 3D printing and curing under the condition of UV wavelength of 405nm, and then under the condition of UV power of 50mW / cm 2 , post-curing treatment was carried out under the condition of ultraviolet light wavelength of 405nm for 10min, and then the stress was released by standing for 24h to obtain a dental pad product.

[0062] Example 4

[0063] This embodiment provides a photocurable resin composition and a tooth pad;

[0064] The preparation method of the photocurable resin composition is as follows: 30 parts of high-hardness polyether polyurethane acrylate, 1 part of high-elasticity polyether polyurethane acrylate, 15 parts of dicyclopentadiene acrylate, 35 parts of trimethylcyclohexyl acrylate, 1 part of 1-hydroxy-cyclohexyl-phenyl ketone, 0.005 parts of UV1990, 0.05 parts of 6-tert-butyl-2,4-dimethylphenol and 0.3 parts of tris(2,4-di-tert-butylphenyl)phosphite are mixed in a batching kettle, and stirred at 600 rpm for 6 hours to form a solution, which is the photocurable resin composition.

[0065] The preparation method of the dental pad is as follows: the photocurable resin composition obtained in this embodiment is subjected to ultraviolet light with a power of 4 mW / cm 2 , 3D printing and curing under the condition of UV wavelength of 405nm, and then under the condition of UV power of 50mW / cm 2 , post-curing treatment was carried out under the condition of ultraviolet light wavelength of 405nm for 10min, and then the stress was released by standing for 24h to obtain a dental pad product.

[0066] Example 5

[0067] This embodiment provides a photocurable resin composition and a tooth pad, which is different from the embodiment 1 only in that the photocurable resin composition includes the following components in parts by weight:

[0068] 45 parts of high hardness polyether polyurethane acrylate, 5 parts of high elasticity polyether polyurethane acrylate, 25 parts of 2-hydroxyethyl methacrylate, 25 parts of cyclotrimethylolpropane formal acrylate, 3.5 parts of 2-hydroxy-2-methyl-1-phenyl-1-propanone, 0.02 parts of UV627, 0.1 parts of N-nitroso-N-phenylhydroxylamine ammonium salt and 0.1 parts of antioxidant 1024.

[0069] Example 6

[0070] This embodiment provides a photocurable resin composition and a tooth pad, which is different from the embodiment 1 only in that the photocurable resin composition includes the following components in parts by weight:

[0071] 35 parts of high hardness polyether polyurethane acrylate, 45 parts of high elasticity polyether polyurethane acrylate, 45 parts of 2-hydroxyethyl methacrylate, 10 parts of tetrahydrofurfuryl alcohol acrylate, 3 parts of 2-methyl-1-[4-(methylthio)phenyl]-2-morpholinyl-1-propanone, 0.02 parts of UV1164, 0.2 parts of tert-butylbenzoquinone and 0.3 parts of butylated hydroxyanisole.

[0072] Example 7

[0073] This embodiment provides a photocurable resin composition and a tooth pad, which is different from the embodiment 1 only in that the photocurable resin composition includes the following components in parts by weight:

[0074] 40 parts of high hardness polyether polyurethane acrylate, 10 parts of high elasticity polyether polyurethane acrylate, 35 parts of benzyl methacrylate, 20 parts of hydroxybutyl acrylate, 2 parts of isopropyl thioxanthone, 0.01 parts of triazine-5, 0.3 parts of p-hydroxyanisole and 0.2 parts of antioxidant 1010.

[0075] Comparative Example 1

[0076] This comparative example provides a photocurable resin composition and a tooth pad, which are different from Example 1 only in that the amount of the triazine ultraviolet absorber UV1577 is 0.0005 parts.

[0077] Comparative Example 2

[0078] This comparative example provides a photocurable resin composition and a tooth pad, which are different from Example 1 only in that the amount of the triazine ultraviolet absorber UV1577 is 0.2 parts.

[0079] Comparative Example 3

[0080] This comparative example provides a photocurable resin composition and a tooth pad, which are different from Example 1 only in that UV1577 is replaced by 2-(2-hydroxy-5-tert-octylphenyl)benzotriazole.

[0081] Comparative Example 4

[0082] This comparative example provides a photocurable resin composition and a dental pad, which are different from Example 1 only in that the amount of the stabilizer p-hydroxyanisole is 0.005 parts.

[0083] Comparative Example 5

[0084] This comparative example provides a photocurable resin composition and a dental pad, which are different from Example 1 only in that the amount of the stabilizer p-hydroxyanisole is 2 parts.

[0085] Comparative Example 6

[0086] This comparative example provides a photocurable resin composition and a tooth pad, which are different from Example 1 only in that the amount of high-hardness polyether polyurethane acrylate is 40 parts and the amount of high-elasticity polyether polyurethane acrylate is 0 parts.

[0087] Comparative Example 7

[0088] This comparative example provides a photocurable resin composition and a tooth pad, which are different from Example 1 only in that the amount of high-hardness polyether polyurethane acrylate is 0 parts and the amount of high-elasticity polyether polyurethane acrylate is 40 parts.

[0089] Comparative Example 8

[0090] This comparative example provides a photocurable resin composition and a dental pad, which are different from Example 1 only in that the amount of isobornyl methacrylate is 60 parts and the amount of ethoxyethoxyethyl acrylate is 0 parts.

[0091] Comparative Example 9

[0092] This comparative example provides a photocurable resin composition and a dental pad, which are different from Example 1 only in that the amount of isobornyl methacrylate is 0 parts and the amount of ethoxyethoxyethyl acrylate is 60 parts.

[0093] Performance Testing

[0094] The surface hardness, elongation at break, impact strength, ultimate tensile strength, degree of overcuring and printing accuracy of the dental pad products provided in the above embodiments and comparative examples were tested. The testing method is as follows:

[0095] Hardness: Tested according to the method of GB / T 2411-2008;

[0096] Impact strength: tested according to ASTM D256;

[0097] Elongation at break: tested according to ASTM D638 and ASTM D412;

[0098] Ultimate tensile strength: tested according to ISO20795-2 method;

[0099] Over-curing degree: By printing the horizontal holes and comparing their size distortion, the closer the horizontal holes are to their original size, the lower the over-curing degree;

[0100] Printing accuracy: Scan the printed product and create a 3D model, then compare the consistency with the original 3D model. The higher the percentage of similarity, the higher the printing accuracy.

[0101] The results of the above tests are shown in Table 1 below:

[0102] Table 1

[0103]

[0104]

[0105] From the test results in Table 1, it can be seen that the tooth pad prepared by the photocurable resin composition provided by the present invention has a hardness of 67D, an impact strength of 53J / m, an elongation at break of 73%, an ultimate tensile strength of 18Map, an overcuring degree of 0.15mm, and a printing accuracy of 88%. It has the advantages of high surface hardness, good toughness, low overcuring degree, and high printing accuracy.

[0106] Compared with Example 1, since the amount of triazine ultraviolet absorber used in Comparative Example 1 is too small, the over-curing degree of the product is relatively high and the printing accuracy is significantly reduced.

[0107] In Comparative Example 2, due to the excessive use of triazine ultraviolet absorbers, the tensile strength and hardness of the product are significantly reduced; at the same time, due to the excessive use of triazine ultraviolet absorbers, the exposure time of printing a single layer is increased, so the printing accuracy is also reduced.

[0108] Since other types of ultraviolet absorbers are used instead of triazine ultraviolet absorbers in Comparative Example 3, the overcuring effect cannot be reduced, resulting in a high degree of overcuring of the product and a significant decrease in printing accuracy.

[0109] In Comparative Example 4, due to the small amount of stabilizer used, the diffusion degree of the dark reaction is high, and the printing accuracy of the product is significantly reduced; at the same time, due to the high diffusion degree of the dark reaction, the overall proportion of the printed product is unbalanced, and the z-axis proportion imbalance also increases accordingly, which in turn leads to an increase in the measured over-curing value.

[0110] In Comparative Example 5, due to the excessive use of stabilizer, the tensile strength and hardness of the product are significantly reduced. At the same time, due to the excessive use of stabilizer, the printing strength is reduced, deformation occurs during the drawing process, and then the z-axis size is distorted, and the measured over-curing value is increased.

[0111] Since the polymer components of Comparative Example 6 are all high-hardness polyether polyurethane acrylates, and the monomer components of Comparative Example 8 are all acrylate hard monomers, the impact strength and elongation at break of the products are significantly reduced.

[0112] Since the polymer components of Comparative Example 7 are all highly elastic polyether polyurethane acrylates, and the monomer components of Comparative Example 9 are all soft acrylate monomers, the tensile strength and hardness of the products are significantly reduced.

[0113] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A photocurable resin composition, characterized in that: The composition comprises the following components in parts by weight: Wherein, the Shore D hardness of the high-hardness polyether polyurethane acrylate is ≥60; The elongation at break of the highly elastic polyether polyurethane acrylate is ≥60%; The triazine ultraviolet absorber is selected from one or more of UV1990, 2,4,6-tris(2'-hydroxy-4'-n-butoxyphenyl), 2,4-bis(2,4-xylyl)-6-(2-hydroxy-4-n-octyloxyphenyl)-1,3,5-triazine, 2-(4,6-diphenyl-1,3,5-triazine-2)-5-n-hexyloxyphenol, 2,4-bis((4-(2-ethyl-hexyloxy) 2-hydroxy)-phenyl) 6-(4-methoxyphenyl)-1,3,5-triazine and UV-1600; The stabilizer is selected from one or more of tert-butylbenzoquinone, 6-tert-butyl-2,4-dimethylphenol, p-hydroxyanisole and N-nitroso-N-phenylhydroxylamine salt.

2. The photocurable resin composition according to claim 1, characterized in that: The photocurable resin composition comprises the following components in parts by weight:

3. The photocurable resin composition according to claim 1 or 2, characterized in that: The acrylate hard monomer is selected from one or more of 4-acryloylmorpholine, dicyclopentadiene acrylate, isobornyl methacrylate, benzyl methacrylate, 2-phenoxyethyl acrylate and 2-hydroxyethyl methacrylate.

4. The photocurable resin composition according to claim 1 or 2, characterized in that: The acrylic ester soft monomer is selected from one or more of cyclotrimethylolpropane formal acrylate, trimethylcyclohexyl acrylate, 4-tert-butylcyclohexyl acrylate, hydroxybutyl acrylate, ethoxyethoxyethyl acrylate and tetrahydrofurfuryl alcohol acrylate.

5. The photocurable resin composition according to claim 1 or 2, characterized in that: The photoinitiator is selected from one or more of 1-hydroxy-cyclohexyl-phenyl ketone, phenyl bis(2,4,6-trimethylbenzoyl)phosphine oxide, 2-methyl-1-[4-(methylthio)phenyl]-2-morpholinyl-1-propanone, 2,4,6-trimethylbenzoyl-diphenylphosphine oxide, isopropylthioxanthone, 2-hydroxy-2-methyl-1-phenyl-1-propanone, η6-isopropylphenylferrocenium hexafluorophosphate, 4-isobutylphenyl-4'-methylphenyliodonium hexafluorophosphate and diphenyl-(4-phenylthio)phenylsulfonium hexafluoroantimonate.

6. The photocurable resin composition according to claim 1 or 2, characterized in that: The photocurable resin composition further includes an antioxidant.

7. The photocurable resin composition according to claim 6, characterized in that: The weight portion of the antioxidant is 0.01-1 part.

8. The photocurable resin composition according to claim 7, characterized in that: The weight portion of the antioxidant is 0.05-0.3 parts.

9. The photocurable resin composition according to claim 6, characterized in that: The antioxidant is selected from one or more of tea polyphenols, tocopherol, butylated hydroxytoluene, butylated hydroxyanisole, tert-butylhydroquinone, tris(2,4-di-tert-butylphenyl)phosphite, pentaerythritol tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate and N,N'-bis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hydrazine.

10. A photocurable product, characterized in that: The photocurable resin composition according to any one of claims 1 to 9 is obtained by 3D printing and UV curing.

11. The photocurable product according to claim 10, characterized in that: The power of the ultraviolet light is 1.5-300mW / cm 2 .

12. The photocurable product according to claim 10, characterized in that: The wavelength of the ultraviolet light is 280-420nm.

13. The photocurable product according to claim 12, characterized in that: The wavelength of the ultraviolet light is 380-405nm.

14. The photocurable product according to claim 10, characterized in that: The light-cured product is a transparent dental pad.

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