Resin solid material, preparation method thereof and dental material

Abstract

The invention provides a resin solid material, a preparation method thereof and a dental material, and relates to resin. The resin solid material comprises an impact modifier, a resin matrix and a monomer, the resin matrix comprises a linear polymer and a network polymer; wherein the mass ratio of the linear polymer to the network polymer is (1.2-2.7): 1. The resin solid material contains the impact modifier, and the mass ratio of the linear polymer to the network polymer is controlled within a specific range, so that the resin solid material has excellent impact resistance, can meet the personalized customization requirements of digital processing, can be better used as a dental material, and has a wide application prospect.

Description

Technical Field

[0001] The present invention relates to the technical field of resin materials, in particular to a resin solid material and a preparation method thereof and a dental material. Background Art

[0002] Prosthodontics is an important branch of dentistry that aims to restore the form, function, and aesthetics of damaged teeth. With the improvement of people's living standards and the growing awareness of oral health, the requirements for restorative materials for tooth defects are becoming increasingly stringent.

[0003] Among them, resin-based composite materials are one of the most common repair materials. They have excellent plasticity, good mechanical properties, and outstanding characteristics such as corrosion resistance, durability, and biocompatibility.

[0004] The main material currently widely used for making removable dentures is polymethyl methacrylate, but this material has the disadvantages of unsatisfactory surface hardness and low wear resistance, resulting in a relatively short service life of synthetic resin teeth.

[0005] Another issue with polymethyl methacrylate resins for denture bases is their poor mechanical properties, particularly impact resistance. Because older prosthesis wearers often have limited mobility, prostheses can occasionally fall onto hard surfaces (tiles, washbasins) during cleaning, potentially causing chipping or breakage.

[0006] Therefore, there is an urgent need to prepare resin-based dental materials with high impact resistance to solve the problem of insufficient mechanical properties of existing resin-based dental restorative materials. Summary of the Invention

[0007] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a resin solid material, a preparation method thereof, and a dental material. By adding an impact modifier and controlling the mass ratio of linear polymers to network polymers within a reasonable range, the flexural strength and total fracture work of the resin solid material can be significantly improved, and the mechanical properties are significantly improved.

[0008] To achieve this object, the present invention adopts the following technical solutions:

[0009] In a first aspect, the present invention provides a resin solid material, which includes an impact modifier, a resin matrix and a monomer; the resin matrix includes a linear polymer and a network polymer; wherein the mass ratio of the linear polymer to the network polymer is (1.2 to 2.7):1.

[0010] The resin solid material provided by the present invention has the following advantages:

[0011] 1. An impact modifier is added to the resin solid material of the present invention. The impact modifier is an additive used to improve the impact resistance of the resin material. It is generally composed of a core layer and a shell layer with different properties. The core layer is generally a rubber phase, which provides elasticity and toughness; the shell layer has better compatibility and stability, and can better bond with the resin matrix. The principles for improving the total fracture work are as follows: First, energy absorption and dissipation. This is usually achieved by the rubber phase in the core layer. When the material is impacted, the core layer acts as a stress concentration point and can produce a large deformation. It absorbs the impact energy through its own elastic deformation and dissipates it in the form of heat energy, thereby effectively preventing brittle fracture of the material and improving the material's impact resistance. Second, it triggers silver streaks and shear bands. The rubber particles in the core layer can trigger the formation of silver streaks and shear bands when the material is impacted. Silver streaks and shear bands can further disperse and absorb impact energy, while also preventing further crack expansion, thereby improving the toughness of the material. The shell layer is usually composed of a material with good compatibility with the resin matrix. It acts as a bridge between the core layer and the resin matrix, allowing the core-shell modifier to be evenly dispersed in the resin matrix, improving the interfacial bonding between the two, allowing the material to more effectively transfer stress when impacted, and fully utilizing the toughening effect of the core layer. In addition, the shell layer can also protect the core layer from external factors (such as oxygen, moisture, ultraviolet rays, etc.), improving the stability and durability of the core-shell impact modifier.

[0012] 2. Use a specific ratio of linear polymers and network polymers, wherein the network polymer is formed by polymerization reaction of monomers and cross-linking agents, and the cross-linking agent is generally a multifunctional monomer or a multifunctional oligomer. It can form a three-dimensional interpenetrating cross-linked network inside the resin block, improve the interaction between the chains, limit the relative movement of the molecular chains, and make the polymer less likely to slip and deform when subjected to external forces, thereby improving the impact resistance of the resin block. Furthermore, the present invention controls the mass ratio of linear polymers and network polymers to (1.2 to 2.7): 1. This is because researchers have found that when the proportion of linear polymers is low, there is a problem of low material strength, and when the proportion of linear polymers is high, there is a problem of uneven material mixing, resulting in uneven material properties.

[0013] Specifically, the mass ratio of the linear polymer to the network polymer is (1.2 to 2.7):1, for example, it can be 1.2:1, 1.4:1, 1.6:1, 1.7:1, 1.9:1, 2.1:1, 2.2:1, 2.4:1, 2.6:1 or 2.7:1, but is not limited to the listed values. Other unlisted values ​​within this range are also applicable, preferably 1.2 to 2.1:1.

[0014] Preferably, the synthetic raw materials of the network polymer include monomers and a cross-linking agent.

[0015] Wherein, the monomer is selected from acrylic acid ester compounds containing a carbon-carbon double bond, and / or methacrylic acid ester compounds containing a carbon-carbon double bond.

[0016] The cross-linking agent is selected from acrylate compounds containing at least two carbon-carbon double bonds and / or methacrylate compounds containing at least two carbon-carbon double bonds.

[0017] The present invention preferably uses acrylate and / or methacrylate compounds as cross-linking agents or monomers, and the resulting resin solid material has good biocompatibility.

[0018] Preferably, the monomer comprises any one or a combination of at least two of aliphatic monoacrylate, aliphatic monomethacrylate, alicyclic monomethacrylate or aromatic monomethacrylate, wherein typical but non-limiting combinations are a combination of aliphatic monoacrylate and aliphatic monomethacrylate, a combination of alicyclic monomethacrylate and aliphatic monomethacrylate, a combination of aliphatic monoacrylate and alicyclic monomethacrylate, and a combination of aromatic monomethacrylate and aliphatic monomethacrylate.

[0019] Preferably, the aliphatic monoacrylate includes any one or a combination of at least two of methyl acrylate, ethyl acrylate, n-butyl acrylate, t-butyl acrylate, 2-ethylhexyl acrylate, lauryl acrylate, octadecyl acrylate, hydroxyethyl acrylate, hydroxypropyl acrylate, ethoxyethoxyethyl acrylate, dimethylaminoethyl acrylate or glycidyl methacrylate, wherein typical but non-limiting combinations are a combination of methyl acrylate and ethyl acrylate, a combination of n-butyl acrylate and ethyl acrylate, a combination of methyl acrylate and n-butyl acrylate, a combination of t-butyl acrylate and ethyl acrylate, a combination of methyl acrylate and 2-ethylhexyl acrylate, a combination of 2-ethylhexyl acrylate and ethyl acrylate, a combination of octadecyl acrylate and ethyl acrylate, a combination of hydroxyethyl acrylate and octadecyl acrylate, a combination of hydroxypropyl acrylate and ethyl acrylate, a combination of ethoxyethoxyethyl acrylate and ethyl acrylate, a combination of hydroxypropyl acrylate and ethoxyethoxyethyl acrylate, and a combination of dimethylaminoethyl acrylate and ethoxyethoxyethyl acrylate.

[0020] Preferably, the alicyclic monoacrylate includes any one or a combination of at least two of isobornyl acrylate, tert-butylcyclohexyl acrylate, tetrahydrofuran acrylate, cyclotrimethylolpropane formal acrylate, 4-tert-butylcyclohexyl acrylate, dicyclopentenyl acrylate, dicyclopentenyl ethoxylated acrylate, 3,3,5-trimethylcyclohexyl acrylate or tetrahydrofurfuryl acrylate, wherein typical but non-limiting combinations are a combination of isobornyl acrylate and tert-butylcyclohexyl acrylate, a combination of tetrahydrofuran acrylate and tert-butylcyclohexyl acrylate, a combination of isobornyl acrylate and cyclotrimethylolpropane formal acrylate, a combination of dicyclopentenyl acrylate and dicyclopentenyl ethoxylated acrylate, a combination of isobornyl acrylate and 3,3,5-trimethylcyclohexyl acrylate, and a combination of tetrahydrofurfuryl acrylate and tert-butylcyclohexyl acrylate.

[0021] Preferably, the aromatic monoacrylate includes any one of p-phenoxy acrylate, m-phenoxy acrylate, 4-methylphenoxy acrylate, 2-phenoxyethyl acrylate, o-phenylphenoxyethyl acrylate, benzyl acrylate, m-phenoxybenzyl acrylate, ethoxylated phenoxy acrylate or o-phenylphenoxyethyl acrylate, or a combination of at least two thereof, wherein typical but non-limiting combinations are a combination of p-phenoxy acrylate and m-phenoxy acrylate, a combination of 4-methylphenoxy acrylate and m-phenoxy acrylate, a combination of p-phenoxy acrylate and 4-methylphenoxy acrylate, a combination of o-phenylphenoxyethyl acrylate and m-phenoxy acrylate, a combination of 2-phenoxyethyl acrylate and o-phenylphenoxyethyl acrylate, a combination of benzyl acrylate and m-phenoxy acrylate, a combination of m-phenoxybenzyl acrylate and m-phenoxy acrylate, a combination of 2-phenoxyethyl acrylate and ethoxylated phenoxy acrylate, and a combination of o-phenylphenoxyethyl acrylate and m-phenoxy acrylate.

[0022] Preferably, the aliphatic monomethacrylate includes any one or a combination of at least two of methyl methacrylate, ethyl methacrylate, n-propyl methacrylate, isopropyl methacrylate, n-butyl methacrylate, 2-ethylhexyl methacrylate, isodecyl methacrylate, lauryl methacrylate, octadecyl methacrylate, behenyl methacrylate, methoxyethyl methacrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate, glycerol monomethacrylate, dimethylaminoethyl methacrylate, diethylaminoethyl methacrylate, glycidyl methacrylate or 2-ethylhexyl methacrylate, wherein a typical but non-limiting combination is a combination of methyl methacrylate and ethyl methacrylate, n-propyl methacrylate and methyl methacrylate. A combination of ethyl acrylate, a combination of methyl methacrylate and isopropyl methacrylate, a combination of n-butyl methacrylate and ethyl methacrylate, a combination of methyl methacrylate and 2-ethylhexyl methacrylate, a combination of isodecyl methacrylate and ethyl methacrylate, a combination of octadecyl methacrylate and lauryl methacrylate, a combination of hydroxypropyl methacrylate and behenyl methacrylate, a combination of methoxyethyl methacrylate and hydroxyethyl methacrylate, a combination of glycerol monomethacrylate and dimethylaminoethyl methacrylate, a combination of diethylaminoethyl methacrylate and ethyl methacrylate, a combination of 2-ethylhexyl methacrylate and glycidyl methacrylate, and a combination of 2-ethylhexyl methacrylate and ethyl methacrylate.

[0023] Preferably, the alicyclic monomethacrylate comprises any one or a combination of at least two of dicyclopentanyl methacrylate, isobornyl methacrylate or cyclohexyl methacrylate, wherein typical but non-limiting combinations are a combination of dicyclopentanyl methacrylate and isobornyl methacrylate, a combination of cyclohexyl methacrylate and isobornyl methacrylate, and a combination of dicyclopentanyl methacrylate and cyclohexyl methacrylate.

[0024] Preferably, the aromatic monomethacrylate comprises benzyl methacrylate.

[0025] Preferably, the crosslinking agent is selected from 1,4-butanediol diacrylate, 1,6-hexanediol diacrylate, ethylene glycol methyl diacrylate, 3-hydroxy-2,2-dimethylpropyl-3-hydroxy-2,2-dimethylpropyl diacrylate, tricyclodecane dimethanol diacrylate, dioxanediol diacrylate, ethoxylated-1,6-hexanediol diacrylate, propoxylated-1,6-hexanediol diacrylate, diethylene glycol diacrylate, tripropylene glycol diacrylate, propoxylated neopentyl glycol diacrylate, ethoxylated bisphenol A diacrylate, pentaerythritol triacrylate, 2-methyl-1,3-propanediol diacrylate, ethoxylated-2-methyl-1,3-propanediol diacrylate, trimethylolpropane triacrylate. Acid ester, tris (2-hydroxyethyl) isocyanurate triacrylate, pentaerythritol tetraacrylate, ethoxylated pentaerythritol tetraacrylate, dipentaerythritol hexaacrylate, polypropylene glycol (700) diacrylate, polyethylene glycol (200) diacrylate, polyethylene glycol (300) diacrylate, polyethylene glycol (400) diacrylate, polyethylene glycol (600) diacrylate, 1,6-hexanediol dimethacrylate, 1,4-butanediol dimethacrylate, neopentyl glycol dimethacrylate, ethylene glycol methyl dimethacrylate, 1,9-nonanediol dimethacrylate, tricyclodecane dimethanol dimethacrylate, tripropylene glycol dimethacrylate, ethoxylated bisphenol A dimethacrylate, triethylene glycol Any one or a combination of at least two of polyethylene glycol (200) dimethacrylate, trimethylolpropane trimethacrylate, ethoxylated trimethylolpropane trimethacrylate, polyethylene glycol (400) dimethacrylate or polyethylene glycol (600) dimethacrylate, wherein a typical but non-limiting combination is a combination of 1,4-butanediol diacrylate and 1,6-hexanediol diacrylate, a combination of ethylene glycol methyl diacrylate and 1,6-hexanediol diacrylate, a combination of 1,4-butanediol diacrylate and 3-hydroxy-2,2-dimethylpropyl-3-hydroxy-2,2-dimethylpropyl diacrylate, tricyclodecane dimethanol diacrylate and dioxanediol diacrylate. The present invention also includes a combination of ethoxylated 1,6-hexanediol diacrylate and 1,6-hexanediol diacrylate, a combination of diethylene glycol diacrylate and propoxylated 1,6-hexanediol diacrylate, a combination of diethylene glycol diacrylate and 1,6-hexanediol diacrylate, a combination of 2-methyl-1,3-propanediol diacrylate and 1,6-hexanediol diacrylate, a combination of 1,4-butanediol diacrylate and ethoxylated 2-methyl-1,3-propanediol diacrylate, and a combination of trimethylolpropane triacrylate and dipentaerythritol hexaacrylate, preferably any one or a combination of at least two of ethylene glycol methyl diacrylate, 1,6-hexanediol diacrylate or 1,4-butanediol diacrylate.

[0026] Preferably, the mass proportion of the monomer in the synthetic raw material is 79.3 to 98 wt%, for example, it can be 79.3 wt%, 80 wt%, 82 wt%, 84 wt%, 86 wt%, 88 wt%, 90 wt%, 92 wt%, 94 wt%, 96 wt% or 98 wt%, etc., but is not limited to the listed values, and other unlisted values ​​within this range are also applicable.

[0027] Preferably, the mass proportion of the cross-linking agent in the synthetic raw material is 1.9 to 20 wt%, for example, it can be 1.9 wt%, 4 wt%, 6 wt%, 8 wt%, 10 wt%, 12 wt%, 14 wt%, 16 wt%, 18 wt% or 20 wt%, etc., but is not limited to the listed values, and other values ​​not listed within this range are also applicable.

[0028] The present invention preferably controls the mass proportion of the cross-linking agent within the above range, which can better provide a cross-linked network structure and improve the resin's drop resistance and flexural strength.

[0029] Preferably, the synthetic raw materials also include an initiator.

[0030] The present invention has no particular limitation on the specific type of the initiator, and any initiator known to those skilled in the art can be used.

[0031] Preferably, the initiator comprises any one or a combination of at least two of benzoyl peroxide, lauroyl peroxide, cumene hydroperoxide, tert-butyl hydroperoxide, di-tert-butyl peroxide, dicumyl peroxide, tert-butyl perbenzoate, tert-butyl pervalerate, methyl ethyl ketone peroxide, cyclohexanone peroxide, diisopropyl peroxydicarbonate or di(2-ethylhexyl) peroxydicarbonate, wherein a typical but non-limiting combination is a combination of benzoyl peroxide and lauroyl peroxide, a combination of benzoyl peroxide and cumene hydroperoxide, a combination of benzoyl peroxide and cumene hydroperoxide, a combination of diisopropyl peroxydicarbonate and di(2-ethylhexyl) peroxydicarbonate, a combination of diisopropyl peroxydicarbonate and di(2-ethylhexyl) peroxydicarbonate, a combination of diisopropyl peroxydicarbonate and diisopropyl ... , a combination of cumene hydroperoxide and lauroyl peroxide, a combination of tert-butyl hydroperoxide and lauroyl peroxide, a combination of benzoyl peroxide and tert-butyl hydroperoxide, a combination of di-tert-butyl peroxide and lauroyl peroxide, a combination of benzoyl peroxide and di-tert-butyl peroxide, a combination of dicumyl peroxide and lauroyl peroxide, a combination of benzoyl peroxide and diisopropyl peroxydicarbonate and lauroyl peroxide, and a combination of benzoyl peroxide and di(2-ethylhexyl) peroxydicarbonate.

[0032] Preferably, the mass proportion of the initiator in the synthetic raw material is 0.1 to 1.25 wt%, for example, it can be 0.1 wt%, 0.2 wt%, 0.3 wt%, 0.4 wt%, 0.5 wt%, 0.6 wt%, 0.7 wt%, 0.8 wt%, 0.9 wt%, 1.0 wt%, 1.2 wt% or 1.25 wt%, etc., but is not limited to the listed values, and other values ​​not listed within this range are also applicable.

[0033] Preferably, the linear polymer comprises any one or a combination of at least two of polymethyl methacrylate, polyethyl methacrylate, polypropyl methacrylate, polyn-butyl methacrylate, polyisobutyl methacrylate or polyhexyl methacrylate, wherein typical but non-limiting combinations are a combination of polymethyl methacrylate and polyethyl methacrylate, a combination of polypropyl methacrylate and polyethyl methacrylate, a combination of polymethyl methacrylate and polypropyl methacrylate, a combination of polyn-butyl methacrylate and polyethyl methacrylate, a combination of polymethyl methacrylate and polyn-butyl methacrylate, and a combination of polymethyl methacrylate and polyhexyl methacrylate.

[0034] Preferably, the weight average molecular weight of the linear polymer is 300,000 to 1.2 million, for example, 300,000, 350,000, 400,000, 500,000, 600,000, 700,000, 800,000, 900,000, 1,000,000, 1,100,000 or 1,200,000, etc., but is not limited to the listed values, and other values ​​not listed within this range are also applicable.

[0035] Preferably, the impact modifier comprises any one or a combination of at least two of chlorinated polyethylene, methyl methacrylate-acrylate copolymer, methyl methacrylate-butadiene-styrene copolymer, styrene-butadiene copolymer, styrene-butadiene-acrylonitrile copolymer, and ethylene-vinyl acetate copolymer, wherein typical but non-limiting combinations are a combination of chlorinated polyethylene and methyl methacrylate-acrylate copolymer, a combination of methyl methacrylate-butadiene-styrene copolymer and methyl methacrylate-acrylate copolymer, a combination of styrene-butadiene copolymer and methyl methacrylate-butadiene-styrene copolymer, a combination of chlorinated polyethylene and styrene-butadiene copolymer, a combination of chlorinated polyethylene and ethylene-vinyl acetate copolymer, a combination of styrene-butadiene-acrylonitrile copolymer and methyl methacrylate-butadiene-styrene copolymer, preferably a combination of methyl methacrylate-acrylate copolymer and methyl methacrylate-butadiene-styrene copolymer, or a combination of styrene-butadiene-acrylonitrile copolymer and methyl methacrylate-butadiene-styrene copolymer.

[0036] It is worth noting that the impact modifier is the core key point of the present invention, which can significantly improve the impact resistance and flexural strength. Furthermore, the present invention preferably adopts the above-mentioned impact modifier to have better impact resistance.

[0037] Furthermore, the preferred impact modifier of the present invention is a combination of methyl methacrylate-acrylate copolymer and methyl methacrylate-butadiene-styrene copolymer, or a combination of styrene-butadiene-acrylonitrile copolymer and methyl methacrylate-butadiene-styrene copolymer; during the research process, it was found that although the addition of a single impact modifier can improve the impact resistance, the use of the above two combinations of impact modifiers can simultaneously improve the impact resistance and flexural strength, and the mechanical properties are significantly improved. The inventors believe that the combination of styrene-butadiene-acrylonitrile copolymer and methyl methacrylate-butadiene-styrene copolymer is due to the fact that the nitrile group provided by the methyl methacrylate-butadiene-styrene copolymer, which is combined with the styrene-butadiene-acrylonitrile copolymer on the basis of the methyl methacrylate-butadiene-styrene copolymer, has the effect of enhancing polarity, significantly improving the rigidity, heat resistance and chemical resistance of the material, thereby further improving the impact resistance and flexural strength of the resin solid material; and the methyl methacrylate-acrylate copolymer, based on the methyl methacrylate-butadiene-styrene copolymer, uses a short-chain hydrocarbon base combined with an aromatic ring hydrocarbon group, which can be combined to improve the impact resistance and flexural strength of the resin solid material.

[0038] Preferably, the mass ratio of the styrene-butadiene-acrylonitrile copolymer to the methyl methacrylate-butadiene-styrene copolymer is 0.43 to 0.75:1, for example, it can be 0.43:1, 0.44:1, 0.45:1, 0.50:1, 0.52:1, 0.53:1, 0.55:1, 0.58:1, 0.60:1, 0.62:1, 0.65:1, 0.68:1, 0.70:1, 0.72:1 or 0.75:1, etc.

[0039] When the mass proportion of the styrene-butadiene-acrylonitrile copolymer is relatively low, there is a problem of insufficient toughness; when the mass proportion of the styrene-butadiene-acrylonitrile copolymer is relatively high, there is a problem of insufficient strength.

[0040] Preferably, the mass ratio of the methyl methacrylate-acrylate copolymer to the methyl methacrylate-butadiene-styrene copolymer is 1.22-1.5:1, for example, it can be 1.22:1, 1.3:1, 1.32:1, 1.35:1, 1.8:1, 1.4:1, 1.42:1, 1.45:1, 1.48:1 or 1.5:1.

[0041] Preferably, the mass content of the impact modifier in the resin solid material is 3 to 14 wt%, for example, it can be 3 wt%, 5 wt%, 6 wt%, 7 wt%, 8 wt%, 10 wt%, 11 wt%, 12 wt%, 13 wt% or 14 wt%, etc., but is not limited to the listed values, and other values ​​not listed within this range are also applicable.

[0042] The mass content of the impact modifier in the present invention has a great influence on the impact resistance and drop resistance of the final resin solid material.

[0043] Preferably, based on weight percentage, the resin solid material comprises 3-14 wt% of an impact modifier, 85-97 wt% of a resin matrix, and less than 2.2 wt% of a monomer.

[0044] It is worth noting that the monomers in the final resin solid material of the present invention are the monomers remaining in the prepared resin matrix and not completely polymerized, and generally ensure that 85 to 97 wt % of the resin matrix is ​​polymerized.

[0045] Specifically, the mass percentage of the resin matrix can be, for example, 85wt%, 86wt%, 87wt%, 88wt%, 89wt%, 90wt%, 90.8wt%, 91.6wt%, 92.4wt%, 93.2wt%, 93.9wt%, 94.7wt%, 95.5wt%, 96.3wt% or 97wt%, etc., but is not limited to the values ​​listed, and other values ​​not listed within the range are equally applicable. The mass percentage of the monomer can be, for example, 2.1wt%, 2.0wt%, 1.9wt%, 1.8wt%, 1.7wt%, 1.6wt%, 1.5wt%, 1.4wt%, 1.3wt%, 1.2wt% or 1.0wt%, etc., but is not limited to the values ​​listed, and other values ​​not listed within the range are equally applicable.

[0046] Preferably, the resin solid material further includes a colorant.

[0047] Preferably, the colorant includes any one or a combination of at least two of zirconium vanadium yellow, cerium praseodymium yellow, lemon yellow, iron oxide yellow, chrome yellow, iron oxide red, erbium oxide, titanium dioxide, cobalt oxide, chromium oxide, iron oxide brown, iron oxide black, carbon black or nylon fiber, wherein typical but non-limiting combinations are the combination of zirconium vanadium yellow and cerium praseodymium yellow, the combination of lemon yellow and cerium praseodymium yellow, the combination of zirconium vanadium yellow and lemon yellow, the combination of iron oxide yellow and cerium praseodymium yellow, the combination of zirconium vanadium yellow and iron oxide yellow, the combination of chrome yellow and iron oxide red, the combination of erbium oxide and cerium praseodymium yellow, the combination of zirconium vanadium yellow and erbium oxide, the combination of cobalt oxide and erbium oxide, the combination of zirconium vanadium yellow and cobalt oxide, the combination of chromium oxide and iron oxide brown, the combination of iron oxide black and iron oxide brown, the combination of chromium oxide and iron oxide black, the combination of carbon black and iron oxide black, and the combination of chromium oxide and nylon fiber.

[0048] Preferably, the mass percentage of the colorant in the resin solid material is ≤0.4wt%, for example, it can be 0.01wt%, 0.06wt%, 0.1wt%, 0.14wt%, 0.19wt%, 0.23wt%, 0.27wt%, 0.32wt%, 0.36wt% or 0.4wt%, etc., but is not limited to the listed values, and other unlisted values ​​within this range are also applicable.

[0049] Preferably, the ultimate flexural strength of the resin solid material is ≥80 MPa, for example, it can be 80 MPa, 81 MPa, 82 MPa, 83 MPa, 84 MPa, 85 MPa, 86 MPa, 87 MPa or 88 MPa, but is not limited to the listed values, and other unlisted values ​​within this range are also applicable.

[0050] Preferably, the flexural elastic modulus of the resin solid material is ≥2270 MPa, for example, it can be 2270 MPa, 2285 MPa, 2299 MPa, 2314 MPa, 2328 MPa, 2343 MPa, 2357 MPa, 2372 MPa, 2386 MPa or 2400 MPa, but is not limited to the listed values, and other unlisted values ​​within this range are also applicable.

[0051] Preferably, the total fracture work of the resin solid material is ≥1580 J / m 2 , for example, it can be 1580J / m 2 、1600J / m 2 、1620J / m 2 、1650J / m 2 、1723J / m 2 、1795J / m 2 、1867J / m 2 、1939J / m 2 、2012J / m 2、2084J / m 2 、2156J / m 2 、2228J / m 2 or 2300 J / m 2 The above values ​​are not limited to the above values, and other values ​​not listed in the above values ​​are also applicable.

[0052] Preferably, the maximum stress intensity factor of the resin solid material is ≥2.7 MPa·m 1 / 2 , for example, it can be 2.7 MPa·m 1 / 2 , 2.9MPa·m 1 / 2 , 3MPa·m 1 / 2 , 3.2MPa·m 1 / 2 , 3.3MPa·m 1 / 2 、3.5MPa·m 1 / 2 、3.6MPa·m 1 / 2 、3.8MPa·m 1 / 2 、3.9MPa·m 1 / 2 or 4.0 MPa·m 1 / 2 The above values ​​are not limited to the above values, and other values ​​not listed in the above values ​​are also applicable.

[0053] In a second aspect, the present invention provides a method for preparing the resin solid material according to the first aspect, the preparation method comprising:

[0054] The raw materials of the resin solid material are mixed, loaded into a mold, and sequentially subjected to hot pressing and cold pressing to obtain the resin solid material.

[0055] The preparation method provided by the second aspect of the present invention is simple to operate and easy to industrialize. The purpose of cold pressing in the present invention is to remove bubbles generated during hot pressing to improve density.

[0056] Preferably, the mixing step comprises: stirring and mixing the linear polymer, the impact modifier and the colorant to obtain a first powder mixture; mixing the crosslinking agent and the monomer to obtain a second liquid mixture; mixing the first powder mixture and the second liquid mixture, and stirring until the dough stage.

[0057] Those skilled in the art know that the dough stage is also called the plastic stage, and can be formed into any shape.

[0058] The present invention preferably uses the impact modifier as a powder component, which greatly improves the convenience of operation and eliminates the risk of precipitation of the impact modifier in the liquid component, thereby improving production convenience and operability.

[0059] Preferably, the hot pressing temperature is 108-150°C, for example, it can be 108°C, 113°C, 118°C, 122°C, 127°C, 132°C, 136°C, 141°C, 146°C or 150°C, but is not limited to the listed values, and other unlisted values ​​within the range are also applicable.

[0060] Preferably, the hot pressing pressure is ≤20 MPa, for example, it can be 20 MPa, 18 MPa, 16 MPa, 14 MPa, 12 MPa, 10 MPa, 8 MPa, 6 MPa, 4 MPa or 1 MPa, etc., but is not limited to the listed values, and other unlisted values ​​within the range are also applicable.

[0061] Preferably, the hot pressing time is ≥15 min, for example, it can be 15 min, 17 min, 19 min, 20 min, 22 min, 24 min, 25 min, 27 min, 29 min or 30 min, but is not limited to the listed values, and other unlisted values ​​within the range are also applicable.

[0062] Preferably, the cold pressing temperature is 10-40°C, for example, it can be 10°C, 14°C, 17°C, 20°C, 24°C, 27°C, 30°C, 34°C, 37°C or 40°C, but is not limited to the listed values, and other unlisted values ​​within this range are also applicable.

[0063] Preferably, the cold pressing pressure is ≤20 MPa, for example, it can be 20 MPa, 18 MPa, 16 MPa, 14 MPa, 12 MPa, 10 MPa, 8 MPa, 6 MPa, 4 MPa or 1 MPa, etc., but is not limited to the listed values, and other unlisted values ​​within the range are also applicable.

[0064] Preferably, the cold pressing time is ≥15 min, for example, it can be 15 min, 17 min, 19 min, 20 min, 22 min, 24 min, 25 min, 27 min, 29 min or 30 min, etc., but is not limited to the listed values, and other values ​​not listed within the range are also applicable.

[0065] In a third aspect, the present invention provides a dental material, comprising the resin solid material according to the first aspect.

[0066] The resin solid material provided in the first aspect of the present invention has excellent mechanical properties and good biocompatibility, and can be preferably used in dental materials.

[0067] Compared with the prior art, the present invention has at least the following beneficial effects:

[0068] (1) The resin solid material provided by the present invention can significantly improve the impact resistance and drop resistance of the resin solid material by adding an impact modifier, wherein the total fracture work of the resin solid material under preferred conditions is ≥1580 J / m 2 , maximum stress intensity factor ≥ 2.7 MPa·m 1 / 2 ;

[0069] (2) The resin solid material provided by the present invention adopts linear polymers and network polymers and strictly controls the ratio between the two, thereby ensuring the impact resistance and drop resistance while further improving the flexural strength of the resin solid material. Under preferred conditions, the ultimate flexural strength of the resin solid material is ≥80 MPa, and the flexural elastic modulus is ≥2270 MPa. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] Figure 1 This is a schematic diagram of the resin solid material prepared in Example 1 of the present invention. DETAILED DESCRIPTION

[0071] For the convenience of understanding the present invention, the present invention is given below with examples. It should be understood by those skilled in the art that the examples are only for the purpose of helping to understand the present invention and should not be regarded as specific limitations of the present invention.

[0072] Example 1

[0073] This embodiment provides a resin solid material, and the composition of raw materials for preparing the resin solid material in terms of mass percentage is shown in Table 1 below.

[0074] Table 1

[0075]

[0076] This embodiment also provides a method for preparing the resin solid material, which comprises the following steps:

[0077] (1) Powder preparation: According to the designed formula, the linear polymer, impact modifier, and colorant are stirred and mixed to obtain a first powder mixture.

[0078] (2) Liquid material preparation: According to the designed formula, the crosslinking agent and initiator are added to the monomer, stirred and mixed to obtain the second liquid phase mixture.

[0079] (3) Paste preparation: Mix the prepared powder and liquid materials and stir until the dough is formed, then put into the mold.

[0080] (4) Compression molding: hot pressing and cold pressing are performed in sequence, wherein the hot pressing temperature is 130° C., the hot pressing pressure is 5 MPa, and the hot pressing time is 25 min; the cold pressing temperature is 20° C., the cold pressing pressure is 2.5 MPa, and the cold pressing time is 20 min, to obtain the resin solid material.

[0081] The actual picture of the resin solid material obtained in this example is as follows Figure 1 As shown, from Figure 1 It can be seen that the resin material has uniform composition and is well prepared.

[0082] Example 2

[0083] This embodiment provides a resin solid material, and the composition of the raw materials for preparing the resin solid material in terms of mass percentage is shown in Table 2 below.

[0084] Table 2

[0085]

[0086] This embodiment also provides a method for preparing the resin solid material, which comprises the following steps:

[0087] (1) Powder preparation: According to the designed formula, the linear polymer, impact modifier, and colorant are stirred and mixed to obtain a first powder mixture.

[0088] (2) Liquid material preparation: According to the designed formula, the crosslinking agent and initiator are added to the monomer, stirred and mixed to obtain the second liquid phase mixture.

[0089] (3) Paste preparation: Mix the prepared powder and liquid materials and stir until the dough is formed, then put into the mold.

[0090] (4) Compression molding: hot pressing and cold pressing are performed in sequence, wherein the hot pressing temperature is 145° C., the hot pressing pressure is 3 MPa, and the hot pressing time is 40 min; the cold pressing temperature is 20° C., the cold pressing pressure is 2.5 MPa, and the cold pressing time is 20 min, to obtain the resin solid material.

[0091] Example 3

[0092] This embodiment provides a resin solid material, and the composition of the raw materials for preparing the resin solid material in terms of mass percentage is shown in Table 3 below.

[0093] Table 3

[0094]

[0095] This embodiment also provides a method for preparing the resin solid material, which comprises the following steps:

[0096] (1) Powder preparation: According to the designed formula, the linear polymer, impact modifier, and colorant are stirred and mixed to obtain a first powder mixture.

[0097] (2) Liquid material preparation: According to the designed formula, the crosslinking agent and initiator are added to the monomer, stirred and mixed to obtain the second liquid phase mixture.

[0098] (3) Paste preparation: Mix the prepared powder and liquid materials and stir until the dough is formed, then put into the mold.

[0099] (4) Compression molding: hot pressing and cold pressing are performed in sequence, wherein the hot pressing temperature is 130° C., the hot pressing pressure is 5 MPa, and the hot pressing time is 60 min; the cold pressing temperature is 15° C., the cold pressing pressure is 5 MPa, and the cold pressing time is 20 min, to obtain the resin solid material.

[0100] Example 4

[0101] This embodiment provides a resin solid material, and the composition of the raw materials for preparing the resin solid material in terms of mass percentage is shown in Table 4 below.

[0102] Table 4

[0103]

[0104] This embodiment also provides a method for preparing the resin solid material, which comprises the following steps:

[0105] (1) Powder preparation: According to the designed formula, the linear polymer, impact modifier, and colorant are stirred and mixed to obtain a first powder mixture.

[0106] (2) Liquid material preparation: According to the designed formula, the crosslinking agent and initiator are added to the monomer, stirred and mixed to obtain the second liquid phase mixture.

[0107] (3) Paste preparation: Mix the prepared powder and liquid materials and stir until the dough is formed, then put into the mold.

[0108] (4) Compression molding: hot pressing and cold pressing are performed in sequence, wherein the hot pressing temperature is 150° C., the hot pressing pressure is 10 MPa, and the hot pressing time is 40 min; the cold pressing temperature is 30° C., the cold pressing pressure is 10 MPa, and the cold pressing time is 20 min, to obtain the resin solid material.

[0109] Example 5

[0110] This embodiment provides a resin solid material, and the composition of the raw materials for preparing the resin solid material in terms of mass percentage is shown in Table 5 below.

[0111] Table 5

[0112]

[0113]

[0114] The preparation method of the resin solid material in this embodiment is the same as that in Example 1.

[0115] Example 6

[0116] This embodiment provides a resin solid material, and the composition of the raw materials for preparing the resin solid material in terms of mass percentage is shown in Table 6 below.

[0117] Table 6

[0118]

[0119] The preparation method of the resin solid material in this embodiment is the same as that in Example 1.

[0120] Example 7

[0121] This embodiment provides a resin solid material. The resin solid material is the same as that in Example 1 except that the styrene-butadiene-acrylonitrile copolymer in the preparation raw material is replaced by chlorinated polyethylene (CPE8000), and the rest is not repeated here.

[0122] Example 8

[0123] This embodiment provides a resin solid material. The resin solid material is the same as that in Example 1 except that the styrene-butadiene-acrylonitrile copolymer in the preparation raw material is replaced by styrene-butadiene copolymer (HS860), and the rest is not repeated here.

[0124] Example 9

[0125] This embodiment provides a resin solid material. The resin solid material is the same as Example 1 except that the content of styrene-butadiene-acrylonitrile copolymer in the preparation raw material is 1wt% and the content of methyl methacrylate-butadiene-styrene copolymer is adjusted to 4wt%, that is, the mass ratio of styrene-butadiene-acrylonitrile copolymer to methyl methacrylate-butadiene-styrene copolymer is 0.25:1. The details are not repeated here.

[0126] Example 10

[0127] This embodiment provides a resin solid material. The resin solid material is the same as Example 1 except that the content of styrene-butadiene-acrylonitrile copolymer in the preparation raw material is 2.5wt%, and the content of methyl methacrylate-butadiene-styrene copolymer is adjusted to 2.5wt%, that is, the mass ratio of styrene-butadiene-acrylonitrile copolymer to methyl methacrylate-butadiene-styrene copolymer is 1:1. The rest is not repeated here.

[0128] Example 11

[0129] This embodiment provides a resin solid material. The resin solid material is the same as that in Example 1 except that all styrene-butadiene-acrylonitrile copolymers in the preparation raw materials are replaced by methyl methacrylate-butadiene-styrene copolymers. Details are not repeated here.

[0130] Example 12

[0131] This embodiment provides a resin solid material. Except that the total content of the impact modifier in the preparation raw materials is only 2wt%, and it is distributed according to the proportion of Example 1, and the composition of the resin matrix raw materials is simultaneously adjusted according to the proportion, the rest is the same as Example 1 and will not be repeated here.

[0132] Example 13

[0133] This embodiment provides a resin solid material. Except that the total content of the impact modifier in the preparation raw materials is only 18wt%, and it is distributed according to the proportion of Example 1, and the composition of the resin matrix raw materials is adjusted according to the proportion at the same time, the rest is the same as Example 1 and will not be repeated here.

[0134] Example 14

[0135] This embodiment provides a resin solid material. The resin solid material is the same as that in Example 1 except that the content of ethylene glycol dimethacrylate in the raw material is 8 wt % and the content of methyl methacrylate is adjusted to 22.44 wt %. Details are not repeated here.

[0136] Comparative Example 1

[0137] This comparative example provides a resin solid material. The resin solid material is the same as Example 1 except that no impact modifier is added to the raw materials for preparation and the proportions of other components remain unchanged, and details are not repeated here.

[0138] Comparative Example 2

[0139] This comparative example provides a resin solid material. Except that the content of polymethyl methacrylate in the preparation raw material is 75%, the total content of the network polymer raw material is only 19.735wt%, and the proportions of the various components in the network polymer raw material are the same as those in Example 1, the rest are the same as those in Example 1 and will not be repeated here.

[0140] Comparative Example 3

[0141] This comparative example provides a resin solid material. Except that the content of polymethyl methacrylate in the preparation raw material is 50%, the total content of the network polymer raw material is 44.735wt%, and the proportions of the various components in the network polymer raw material are the same as those in Example 1, the rest are the same as those in Example 1 and will not be repeated here.

[0142] Comparative Example 4

[0143] This comparative example provides a resin solid material. The resin solid material is the same as Example 1 except that ethylene glycol dimethacrylate is not added to the raw materials for preparation and ethylene glycol dimethacrylate is completely replaced by methyl methacrylate. The details are not repeated here.

[0144] Test method:

[0145] 1. Flexural Properties: Resin discs were machined using CAD / CAM processing equipment. Five specimens measuring (10 ± 0.2) x (3.3 ± 0.2) x 64 mm were prepared according to the flexural properties test protocol specified in dental standard YY0270.1-2011. The specimens were rough-polished using 800-grit sandpaper and fine-polished using 2000-grit sandpaper. Specimen dimensions were measured with calipers to an accuracy of 0.01 mm, with a height parallelism requirement of ±0.02 mm. A ziplock bag was prepared and half-filled with pure water. The specimens were placed in the bag, completely submerged, and the bag was checked for leaks. The specimens were then placed in a water bath filled with an appropriate amount of water. The bath temperature was set to (37 ± 1)°C for (50 ± 2) hours. Testing was performed using a Shimadzu tensile testing machine (AGS-X-20KND). The test was conducted according to the flexural test protocol in dental standard YY0270.1-2011: speed (5±1) mm / min, span (50±0.1) mm; the corresponding test parameters were entered, the test specimen was removed from the water bath, and immediately placed symmetrically on a test platform immersed in a (37±1)°C water bath, ensuring that the center of the specimen was in the center of the platform. The test was started and continued until the specimen broke or plastic deformation occurred. The test was then completed and the test results were output.

[0146] The ultimate flexural strength σ (MPa) can be calculated according to the following formula:

[0147]

[0148] Where F (N) is the maximum force applied to the test strip. L (mm) is the distance between the support rods. b (mm) and h (mm) are the width and height of the test strip before immersion.

[0149] The flexural modulus E (MPa) can be calculated as follows:

[0150]

[0151] Where d (mm) is the deflection at maximum force.

[0152] 2. Fracture Toughness: Denture base resin discs were processed using CAD / CAM equipment. Ten specimens measuring (8.0±0.2)*(4.0±0.2)*39 mm were prepared according to the fracture toughness test protocol specified in dental standard YY0270.1-2011. The specimens were rough-polished using 1000-grit sandpaper and fine-polished using 1200-grit sandpaper. A prefabricated notch with a depth of (3.0±0.2) mm and a width of (0.5±0.1) mm was cut in the center of the notch, along the height direction. A fine-pointed notch with a depth of 100–400 μm was also cut at the center of the notch. Specimen dimensions were measured with a caliper to the nearest 0.01 mm. Prepare a ziplock bag and fill it halfway with pure water. Place the test strip in the sealed bag, completely submerging it. Verify the bag's seal is tight and place the strip in a water bath filled with an appropriate amount of water. Set the bath temperature to (37±1)°C for 7 days ± 2 hours. Before testing, store the strip in another container of water at (23±1)°C for (60±15) minutes. Remove one strip from the water and dry it with a clean towel. Place the strip on the support frame of the bending test apparatus. The fine tip notch of the strip faces away from the load punch. Ensure the fine tip notch is centered on the support frame. The distance between the centers of the two support cylinders of the testing machine is (32.0±0.1) mm. The blade speed is maintained at a constant (1.0±0.2) mm / min, with a measurement accuracy of 0.025 mm. Starting from zero, gradually apply force until the notch reaches nearly the opposite side of the strip at maximum pressure. The test is considered complete when the load decreases to 5% of the maximum load or to less than (1.0 ± 0.2) N. Use an optical microscope to measure the depth of the prefabricated notch immediately adjacent to the fracture surface, including the fine tip notch. The average of three measurements is taken as the total notch length. The three measurements should be taken at one-quarter and one-half of the fracture surface width.

[0153] Maximum stress intensity factor K max It can be expressed as:

[0154]

[0155] Where: Let x be the ratio of the total cut depth a to the height, then

[0156] f(x)=3x 1 / 2 [1.99-x(1-x)(2.15-3.93x+2.7x 2 )]

[0157] / [2(1+2x)(1-x) 3 / 2 ]

[0158] P max (N) is the maximum force applied to the test strip. l (mm) is the distance between the support rods. b (mm) and h (mm) are the width and height of the test strip before immersion in water, respectively.

[0159] The total work of fracture can be expressed as:

[0160]

[0161] Where U is the integral area of ​​the curve.

[0162] 3. Appearance: Observe with the naked eye under natural light to see if the color is uniform.

[0163] The test results of the above embodiments and comparative examples are shown in Table 7.

[0164] Table 7

[0165]

[0166]

[0167] From Table 7, we can see the following points:

[0168] (1) It can be seen from Examples 1 to 6 that the resin solid material provided by the present invention can obtain a resin solid material with excellent flexural strength, total work of fracture, and maximum stress intensity factor by combining a linear polymer and a network polymer and adding an impact modifier, thereby being able to be digitally processed while having excellent anti-drop performance, wherein the ultimate flexural strength is above 80 MPa, the flexural elastic modulus is above 2270 MPa, and the total work of fracture is above 1580 J / m 2 Above, the maximum stress intensity factor is 2.721MPa·m 1 / 2 above.

[0169] (2) Comparing Example 1 with Comparative Example 1, the fracture work of Comparative Example 1 without adding an impact modifier is only 318.43 J / m 2 , the fracture work is low, indicating that the addition of impact modifier helps to improve the impact resistance of the material;

[0170] Comparing Example 1 with Comparative Example 2, the linear polymer accounts for a higher proportion in Comparative Example 2, and its fracture work is 1012.34 J / m 2 , has impact resistance, but not high, and the flexural strength is also reduced accordingly, and its appearance has uneven color dispersion. This shows that if the linear polymer is too high, it will cause uneven mixing of powder and liquid, and the material cannot be evenly dispersed in the material;

[0171] Comparing Example 1 with Comparative Example 3, the linear polymer content in Comparative Example 3 is low, and its flexural strength is 72.15 MPa, which is relatively low. This shows that the content of linear polymer is too low to provide high strength and it is difficult to meet the requirements of dental materials.

[0172] Comparing Example 1 with Comparative Example 4, in which no crosslinking agent was added, the fracture work was 914.56 J / m 2 , the flexural strength is only 62.36MPa, indicating that the cross-linking agent has a greater influence on the strength of the material;

[0173] From Example 1 and Comparative Examples 1 to 4, it can be seen that the addition of the network polymer, linear polymer, and impact modifier in the present invention has a significant effect on the flexural strength and drop resistance of the resin solid material. By combining the three and controlling the ratio of the linear polymer to the network polymer within a reasonable range, the present invention can obtain a resin solid material with high flexural strength and maximum stress intensity factor, and a uniform appearance, which can be preferably used as a dental material.

[0174] (3) From Examples 1 to 7 to 11, it can be seen that when other substances are compounded with methyl methacrylate-butadiene-styrene copolymer in Examples 7 to 8, at the same ratio, the total work of fracture and the maximum stress intensity factor are significantly lower than those in Example 1; when the mass ratio of styrene-butadiene-acrylonitrile copolymer to methyl methacrylate-butadiene-styrene copolymer is adjusted to be out of the preferred range in Examples 9 to 10, the total work of fracture is also significantly lower than that in Example 1, indicating that the drop resistance is reduced; when only methyl methacrylate-butadiene-styrene copolymer is used as an impact modifier in Example 11, the flexural strength and drop resistance are both reduced, which shows that the present invention preferably uses a compounded impact modifier, which has better drop resistance.

[0175] Similar conclusions were drawn for methyl methacrylate-acrylate copolymer and methyl methacrylate-butadiene-styrene copolymer, and the experimental data will not be repeated here.

[0176] (4) By comparing Example 1 with Examples 12 to 13, it can be seen that the present invention controls the content of the impact modifier within a reasonable range, and can comprehensively obtain a resin solid material with high drop resistance and flexural strength.

[0177] (5) By comparing Example 1 and Example 14, it can be seen that when the content of the cross-linking agent in the raw material is too much, even when the same type and the same proportion of impact modifier are added, the total work of fracture and the maximum stress intensity factor are significantly reduced, indicating that the various components in the present invention are interrelated and work together to obtain a resin solid material with better flexural strength and drop resistance.

[0178] The present invention uses the above-described embodiments to illustrate the detailed features of the present invention. However, the present invention is not limited to the above-described detailed features, which does not mean that the present invention must rely on the above-described detailed features to be implemented. Those skilled in the art should understand that any improvements to the present invention, equivalent replacements for the selected technical features of the present invention, additions to auxiliary technical features, and selections of specific methods, etc., fall within the scope of protection and disclosure of the present invention.

Claims

1. A resin solid material, characterized in that: The resin solid material includes an impact modifier, a resin matrix and a monomer; The resin matrix includes linear polymers and network polymers; Among them, the mass ratio of linear polymer to network polymer is (1.2-2.7):

1.

2. The resin solid material according to claim 1, characterized in that The synthetic raw materials of the network polymer include monomers and cross-linking agents; Wherein, the monomer is selected from an acrylate compound containing one carbon-carbon double bond, and / or a methacrylate compound containing one carbon-carbon double bond; the cross-linking agent is selected from an acrylate compound containing at least two carbon-carbon double bonds, and / or a methacrylate compound containing at least two carbon-carbon double bonds; Preferably, the monomer includes any one or a combination of at least two of aliphatic monoacrylate, aliphatic monomethacrylate, alicyclic monomethacrylate or aromatic monomethacrylate.

3. The resin solid material according to claim 2, characterized in that The weight percentage of monomers in the synthetic raw materials is 79.3-98 wt%; Preferably, the mass proportion of the cross-linking agent in the synthetic raw material is 1.9 to 20 wt%; Preferably, the synthetic raw materials further include an initiator; Preferably, the mass proportion of the initiator in the synthetic raw materials is 0.1 to 1.25 wt%.

4. The resin solid material according to any one of claims 1 to 3, characterized in that The linear polymer includes any one of polymethyl methacrylate, polyethyl methacrylate, polypropyl methacrylate, polyn-butyl methacrylate, polyisobutyl methacrylate or polyhexyl methacrylate, or a combination of at least two thereof.

5. The resin solid material according to any one of claims 1 to 4, characterized in that: The impact modifier includes any one or a combination of at least two of chlorinated polyethylene, methyl methacrylate-acrylate copolymer, methyl methacrylate-butadiene-styrene copolymer, styrene-butadiene copolymer, styrene-butadiene-acrylonitrile copolymer, and ethylene-vinyl acetate copolymer, preferably a combination of methyl methacrylate-acrylate copolymer and methyl methacrylate-butadiene-styrene copolymer, or a combination of styrene-butadiene-acrylonitrile copolymer and methyl methacrylate-butadiene-styrene copolymer; Preferably, the mass ratio of the styrene-butadiene-acrylonitrile copolymer to the methyl methacrylate-butadiene-styrene copolymer is 0.43 to 0.75:1; Preferably, the mass ratio of the methyl methacrylate-acrylate copolymer to the methyl methacrylate-butadiene-styrene copolymer is 1.22-1.5:

1.

6. The resin solid material according to any one of claims 1 to 5, characterized in that: The mass content of the impact modifier in the resin solid material is 3 to 14 wt%.

7. The resin solid material according to any one of claims 1 to 6, characterized in that: Calculated by weight percentage, the resin solid material includes 3-14 wt% of an impact modifier, 85-97 wt% of a resin matrix, and less than 2.2 wt% of a monomer; Preferably, the resin solid material further includes a colorant; Preferably, the mass percentage of the colorant in the resin solid material is ≤0.4wt%.

8. The resin solid material according to any one of claims 1 to 7, characterized in that The ultimate flexural strength of the resin solid material is ≥80MPa; Preferably, the flexural elastic modulus of the resin solid material is ≥2270 MPa; Preferably, the total fracture work of the resin solid material is ≥1580 J / m 2 ; Preferably, the maximum stress intensity factor of the resin solid material is ≥2.7 MPa·m 1 / 2 .

9. A method for preparing a resin solid material according to any one of claims 1 to 8, characterized in that: The preparation method comprises: Mixing raw materials of a resin solid material, placing the mixture into a mold, and sequentially subjecting the mixture to hot pressing and cold pressing to obtain the resin solid material; Preferably, the temperature of the hot pressing is 108-150°C; Preferably, the hot pressing pressure is ≤20 MPa; Preferably, the hot pressing time is ≥15 min; Preferably, the cold pressing temperature is 10-40°C; Preferably, the cold pressing pressure is ≤20 MPa; Preferably, the cold pressing time is ≥15 min.

10. A dental material, characterized in that The dental material comprises the resin solid material according to any one of claims 1 to 8.

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