Naphthyl high-refractive-index optical resin as well as preparation method and application thereof

Abstract

The invention provides naphthyl high-refractive-index optical resin as well as a preparation method and application thereof, the structural formula of the naphthyl high-refractive-index optical resin is as shown in formula (1), and the refractive index of the naphthyl high-refractive-index optical resin is 1.685-1.778; the weight-average molecular weight of the naphthyl high-refractive-index optical resin is 2.24 * 10 < 4 >-8.92 * 10 < 4 > g / mol; the invention relates to a method for preparing naphthyl high-refractive-index optical resin, which comprises the following steps: dissolving a dimercapto compound and binaphthol fluorene diacrylate in a solvent A, adding a catalyst under the protection of nitrogen, uniformly stirring, and carrying out Michael addition polymerization reaction under the conditions of normal pressure, polymerization temperature of 0-120 DEG C and polymerization time of 1-24 hours to obtain a mixed solution; then adding the mixed solution into a solvent B, regenerating, separating out blocks, and washing and purifying to obtain the naphthyl high-refractive-index optical resin. The material has the beneficial effects of high refractive index and high thermal stability, can meet the use requirements of higher refractive index, lighter weight and thinner weight of optical products, and is suitable for the technical field of optical materials.

Description

Technical Field

[0001] The present application relates to the field of optical materials, and in particular to a naphthyl high-refractive-index optical resin and a preparation method and application thereof. Background Art

[0002] Optical resin is a resin synthesized to achieve certain optical properties. It is a transparent polymer material with the characteristics of high transparency, easy processing and molding, thinness, structural designability and impact resistance. It is widely used in camera lenses, car lenses, telescopes and other optical products. In recent years, the development of electronic products has put forward higher requirements for the development of optical lenses with high refractive index.

[0003] Naphthalene is a common aromatic ring structure. Compared with the benzene ring, the molar refractive index R LL =25, the aromatic naphthalene ring structure has a higher molar refractive index R LL = 43. Introducing the aromatic naphthalene ring structure into the polymer main chain helps to promote intermolecular forces, enhance molecular stacking, and reduce the molar volume, thereby facilitating the preparation of optical resins with higher refractive index.

[0004] In the prior art, patent CN109053998A synthesizes an epoxy resin containing a sulfur-containing binaphthyl structure, and after curing, a high-refractive-index resin with a refractive index of about 1.68 can be prepared; patents CN104769007A and CN108329464A use a diol monomer with a binaphthyl structure and copolymerize it with a carbonate diester to obtain a copolycarbonate resin with a refractive index of up to 1.666; patents CN109476835A and CN111630109A use bis-naphthol fluorene as a diol monomer and copolymerize it with a carbonate diester to obtain a copolycarbonate resin with a refractive index of up to 1.682.

[0005] In summary, the refractive index of optical resins containing naphthyl structures in the prior art is generally low, which makes it difficult to meet the development requirements of optical products with higher refractive index and thinner weight. Summary of the invention

[0006] In order to solve one of the above-mentioned technical defects, the present application provides a naphthyl high refractive index optical resin and its preparation method and application.

[0007] According to a first aspect of the present application, a naphthyl high refractive index optical resin is provided, wherein the structural formula of the naphthyl high refractive index optical resin is:

[0008]

[0009] In formula (1), R1 is any aliphatic group or any aromatic group;

[0010] The refractive index of the naphthyl high refractive index optical resin is 1.685 to 1.778;

[0011] The weight average molecular weight of the naphthyl high refractive index optical resin is 2.24×10 4 ~8.92×10 4 g / mol.

[0012] Preferably, the aliphatic group comprises:

[0013]

[0014] Preferably, the aromatic group includes:

[0015]

[0016] According to a second aspect of the present application, there is provided a method for preparing a naphthyl high refractive index optical resin as described in any one of the above items, comprising the following steps:

[0017] Dissolving the dithiol compound and bis-naphthol fluorene diacrylate in solvent A, adding a catalyst under nitrogen protection, stirring evenly, and performing Michael addition polymerization reaction under normal pressure, polymerization temperature of 0 to 120° C., and polymerization time of 1 to 24 hours to obtain a mixed solution;

[0018] Then the mixed solution is added into solvent B for regeneration, and blocks are precipitated, and after washing and purification, a naphthyl high refractive index optical resin can be obtained;

[0019] The reaction equation is:

[0020]

[0021] In formula (2), R1 is any aliphatic group or any aromatic group.

[0022] Preferably, the molar ratio of the dithiol compound to the bis-naphthol fluorene diacrylate is 1:0.9-1.1; the molar ratio of the dithiol compound to the catalyst is 1:1×10 -4 ~1.5×10 -1 .

[0023] More preferably, the amount of the solvent A added is 2 to 32 times the total amount of the bis-naphthol fluorene diacrylate and the dithiol compound added; and the amount of the solvent B added is 20 to 100 times the amount of the solvent A added.

[0024] Preferably, the solvent A is any one or more of dichloromethane, chloroform, 1,2-dichloroethane, tetrahydrofuran, cyclohexanone, dioxane, N,N-dimethylformamide, N,N-dimethylacetamide, N,N-dimethylpropylene urea, and N-methylpyrrolidone.

[0025] Preferably, the solvent B is any one or more of methanol, ethanol, isopropanol, ether and water.

[0026] Preferably, the catalyst is any one of the ionic liquid catalysts or any one or more of the organic base catalysts; the cations in the ionic liquid catalyst include: imidazole cations, quaternary ammonium cations, quaternary phosphine cations, piperidine cations and pyridine cations; the anions in the ionic liquid catalyst include: carboxylic acid anions, lactic acid anions, amino acid anions or amide anions; the organic base catalyst includes: triethylamine, tributylamine, pyridine, tetramethylguanidine, piperidine, piperazine, 1,8-diazabicyclo[5.4.0]undec-7-ene, 1,5,7-triazabicyclo[4.4.0]decene-5-ene, 1,5-diazabicyclo[4.3.0]non-5-ene, 1,4-diazidebicyclo[2.2.2]octane.

[0027] According to the third aspect of the present application, there is provided a use of a naphthyl high refractive index optical resin as described in any one of the above items in the preparation of optical films, optical components, electronic products, electrical equipment, packaging materials or medical devices.

[0028] In the structural formula shown in formula (1) provided by the present application, the aromatic naphthalene ring structure is introduced into the main chain of the polymer, which is helpful for intermolecular forces, enhancing molecular stacking, and reducing the molar volume, thereby facilitating the preparation of an optical resin with a higher refractive index. Two aromatic naphthalene ring structures and sulfur are simultaneously introduced on the basis of the polyaromatic ring structure. Since the refractive index of the polymer is superimposable, the molar refractive index of the polymer repeating unit structure can be further improved, thereby improving the optical refractive index of the resin. In addition, the polyaromatic ring structure is highly unsaturated, which makes the chemical properties of the molecular structure abnormally stable, and therefore also has excellent thermal stability. In summary, the prepared naphthyl high refractive index optical resin has a high refractive index and high thermal stability, and the refractive index can reach 1.778, which can meet the use requirements of optical products with a higher refractive index and thinner weight.

[0029] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the contents indicated in the written description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0031] Figure 1 The hydrogen nuclear magnetic resonance of the naphthyl high refractive index optical resin prepared in Examples 1 to 4 of the present application is 1 H-NMR spectrum;

[0032] Figure 2 The weight average molecular weight distribution GPC graph of the naphthyl high refractive index optical resin prepared in Examples 1 to 4 of the present application;

[0033] Figure 3 Thermogravimetric TGA graphs of the naphthyl high refractive index optical resins prepared in Examples 1 to 4 of the present application;

[0034] Figure 4 This is the DSC graph of the thermal spectra of the naphthyl high refractive index optical resin prepared in Examples 1 to 4 of the present application. DETAILED DESCRIPTION

[0035] In order to make the technical solutions and advantages in the embodiments of the present application more clearly understood, the exemplary embodiments of the present application are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than an exhaustive list of all the embodiments. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0036] In view of the above problems, the present application provides a naphthyl high refractive index optical resin, the structural formula of which is:

[0037]

[0038] In formula (1), R1 is any aliphatic group or any aromatic group;

[0039] The aliphatic groups include:

[0040]

[0041] The aromatic groups include:

[0042]

[0043] In the structural formula shown in formula (1) provided by the present application, the aromatic naphthalene ring structure is introduced into the main chain of the polymer, which is helpful for intermolecular forces, enhancing molecular stacking, and reducing the molar volume, thereby facilitating the preparation of an optical resin with a higher refractive index. Two aromatic naphthalene ring structures and sulfur are simultaneously introduced on the basis of the polyaromatic ring structure. Since the refractive index of the polymer is superimposable, the molar refractive index of the polymer repeating unit structure can be further improved, thereby improving the optical refractive index of the resin. In addition, the polyaromatic ring structure is highly unsaturated, which makes the chemical properties of the molecular structure abnormally stable, and therefore also has excellent thermal stability. In summary, the prepared naphthyl high refractive index optical resin has a high refractive index and high thermal stability, and the refractive index can reach 1.778, which can meet the use requirements of optical products with a higher refractive index and thinner weight.

[0044] Correspondingly, the structural formula of a naphthyl high refractive index optical resin provided in the present application includes but is not limited to any one of the following structural formulas (1-1) to (1-17):

[0045]

[0046]

[0047]

[0048]

[0049] The refractive index of the naphthyl high refractive index optical resin provided in the present application can reach 1.685 to 1.778; specifically, the refractive indices of the naphthyl high refractive index optical resins corresponding to structural formulas (1-1) to (1-17) are: 1.685, 1.685, 1.695, 1.737, 1.732, 1.732, 1.721, 1.721, 1.739, 1.744, 1.749, 1.775, 1.749, 1.751, 1.769, 1.769, and 1.778, respectively.

[0050] The weight average molecular weight of the naphthyl high refractive index optical resin provided in this application is 2.24×10 4 ~8.92×10 4 g / mol; Specifically, the weight average molecular weights of the naphthyl high refractive index optical resins corresponding to the structural formulas (1-1) to (1-17) are: 8.92×10 4 g / mol, 7.65×10 4 g / mol, 5.68×10 4 g / mol, 3.37×10 4 g / mol, 2.85×10 4 g / mol, 2.24×10 4g / mol, 3.50×10 4 g / mol, 4.0×10 4 g / mol, 7.21×10 4 g / mol, 5.53×10 4 g / mol, 6.26×10 4 g / mol, 5.51×10 4 g / mol, 4.32×10 4 g / mol, 2.64×10 4 g / mol, 4.83×10 4 g / mol, 2.95×10 4 g / mol, 3.97×10 4 Specifically, the naphthyl high refractive index optical resin provided in the present application has a glass transition temperature of 140°C to 193°C.

[0051] Embodiments 1 to 8 of the present application also provide a method for preparing a naphthyl high refractive index optical resin as described in any one of the above contents, comprising the following steps:

[0052] Dissolve the dithiol compound and bis-naphthol fluorene diacrylate in a molar ratio of 1:0.9-1.1 in solvent A, wherein the amount of solvent A added is 2-32 times the total amount of bis-naphthol fluorene diacrylate and dithiol compound added; add the catalyst under nitrogen protection and stir evenly, wherein the molar ratio of dithiol compound to catalyst is 1:1×10 -4 ~1.5×10 -1 ; A mixed solution is obtained by Michael addition polymerization reaction under normal pressure, polymerization temperature of 0 to 120° C., and polymerization time of 1 to 24 hours;

[0053] Then the mixed solution is added into solvent B, the amount of solvent B added is 20 to 100 times the amount of solvent A added (the amount added here refers to volume), regenerated, lumps are precipitated, and after washing and purification, a naphthyl high refractive index optical resin can be obtained.

[0054] The specific raw material addition amounts and reaction conditions in Examples 1 to 8 are shown in Table 1 below.

[0055] In this application, by changing the ratio of dithiol compound, bis-naphthol fluorene diacrylate and catalyst, the molecular weight of the prepared naphthyl high refractive index optical resin can be regulated, so that the prepared naphthyl high refractive index optical resin is more in line with the actual use needs, thereby facilitating subsequent processing. The main raw materials in this application are dithiol compound and bis-naphthol fluorene diacrylate, wherein bis-naphthol fluorene diacrylate provides a thermal stability unit structure of the polymer main chain structure, and the dithiol compound can regulate the repeating unit structure of the polymer main chain, not only introducing sulfur elements that can further increase the refractive index, but also regulating the differential aliphatic ring structure or aromatic ring structure according to actual use requirements, by selecting different types of dithiol compounds, and then realizing the preparation of optical resins with different gradient refractive indices. The addition of the catalyst in this application can regulate the molecular weight of the polymer to meet the use requirements of subsequent polymer preparation into film. The preparation method provided by the present application is simple and can be mass-produced; the amount of catalyst added is small, the reaction conditions are mild, and the reaction process does not cause environmental pollution. The prepared naphthyl high-refractive-index optical resin does not contain toxic substances, and is an efficient, green, and environmentally friendly preparation method for naphthyl high-refractive-index optical resin. In addition, the naphthyl high-refractive-index optical resin prepared by the present application is a thermoplastic resin material, which can be repeatedly processed and reused or recycled, and is more green and environmentally friendly.

[0056] Specifically, the structural formula of bis-naphthol fluorene diacrylate (hereinafter referred to as BNFDA) is:

[0057]

[0058] The structural formula of the dithiol compound is: HS-R1-SH;

[0059] The equation for the Michael addition polymerization reaction is:

[0060]

[0061] In formula (2), R1 is any aliphatic group or any aromatic group.

[0062] Further, the catalyst is any one of the ionic liquid catalysts or any one or more of the organic base catalysts; the cations in the ionic liquid catalyst include: imidazole cations, quaternary ammonium cations, quaternary phosphine cations, piperidine cations and pyridine cations; the anions in the ionic liquid catalyst include: carboxylic acid anions, lactic acid anions, amino acid anions or amide anions;

[0063] Organic base catalysts include: triethylamine, tributylamine, pyridine, tetramethylguanidine, piperidine, piperazine, 1,8-diazabicyclo[5.4.0]undec-7-ene (DBU), 1,5,7-triazabicyclo[4.4.0]decene-5-ene (TBD), 1,5-diazabicyclo[4.3.0]non-5-ene (DBN), and 1,4-diazidebicyclo[2.2.2]octane (DABCO).

[0064] Furthermore, solvent A is any one or more of dichloromethane, chloroform (CHCl3), 1,2-dichloroethane, tetrahydrofuran, cyclohexanone, dioxane, N,N-dimethylformamide (DMF), N,N-dimethylacetamide (DMAc), N,N-dimethylpropylene urea (DMPU), and N-methylpyrrolidone (NMP).

[0065] Furthermore, solvent B is any one or more of methanol, ethanol, isopropanol, ether and water.

[0066] Specifically, in the actual application process, one or more additives selected from antioxidants, plasticizers, anti-aging agents, heat stabilizers, fillers, dyes, light stabilizers, ultraviolet absorbers, flame retardants, antistatic agents, release agents or antibacterial agents can be added. This can improve the antioxidant, anti-ultraviolet, antibacterial, flame retardant, stability and other properties of the prepared naphthyl high refractive index optical resin. The content of the additives can be added in appropriate amounts as required.

[0067] Correspondingly, the equations for the Michael addition polymerization reactions in Examples 1 to 8 are:

[0068] Embodiment 1:

[0069]

[0070] Embodiment 2:

[0071]

[0072] Embodiment 3:

[0073]

[0074] Embodiment 4:

[0075]

[0076] Embodiment 5:

[0077]

[0078] Embodiment 6:

[0079]

[0080] Embodiment 7:

[0081]

[0082] Embodiment 8:

[0083]

[0084] This application also provides Comparative Example 1 and Comparative Example 2.

[0085] The difference between Comparative Example 1 and Example 1 of the present application is that no catalyst is added in Comparative Example 1.

[0086] The difference between Comparative Example 2 and Example 5 of the present application is that in Comparative Example 2, 1,8-octanedithiol is used to replace the dithiol compound 2,5-dithiol-1,4-dithiane in Example 5.

[0087] In order to demonstrate the beneficial effects of the naphthyl high refractive index optical resin prepared in the examples of the present application, the polymers prepared in Examples 1 to 8, Comparative Examples 1 and 2 were subjected to polymer component detection, thermal property detection and physical property detection, and the detection results are shown in Table 1 below. In addition, in order to save space and be concise, only the relevant detection diagrams of the polymers prepared in Examples 1 to 4 are described.

[0088] Polymer component detection method:

[0089] The deuterated chloroform H-NMR spectra of the polymers prepared in Examples 1 to 8, Comparative Example 1 and Comparative Example 2 were tested using a 600 MHz nuclear magnetic resonance instrument.

[0090] Figure 1 The hydrogen nuclear magnetic resonance of the naphthyl high refractive index optical resin prepared in Examples 1 to 4 of the present application is 1 H-NMR spectra, such as Figure 1 As shown, each peak was assigned, and it can be seen that Examples 1 to 4 successfully prepared the naphthyl high refractive index optical resin.

[0091] Figure 2 This is the weight average molecular weight distribution GPC diagram of the naphthyl high refractive index optical resin prepared in Examples 1 to 4 of the present application, Figure 3 The thermogravimetric TGA graph of the naphthyl high refractive index optical resin prepared in Examples 1 to 4 of the present application is shown in FIG. Figure 4 This is the DSC graph of the thermal spectra of the naphthyl high refractive index optical resin prepared in Examples 1 to 4 of the present application.

[0092] Thermal property testing methods and physical property testing methods:

[0093] 1) Preparation of test sample membrane:

[0094] 1 g of the polymers prepared in Examples 1 to 8, Comparative Examples 1 and 2 were respectively dissolved in 10 ml of dichloromethane and then poured onto corresponding glass dishes. After being fully dried at room temperature, test sample films with a thickness of about 100 μm were prepared.

[0095] 2) Test the physical properties of the sample film:

[0096] Weight average molecular weight (M w ): A gel permeation chromatograph (PL-GPC 50) manufactured by Agilent Technologies was used, N,N-dimethylformamide (DMF) was used as the developing solvent, and monodisperse polystyrene with known molecular weight was used as the standard sample to prepare a standard curve. Based on the standard curve, M was obtained from the retention time of GPC. w .

[0097] Refractive index (n D ): The refractive index of the sample film at 25° C. was measured using an Abbe refractometer (DR-M4) manufactured by ATAGO, with a wavelength of 589 nm.

[0098] Abbe number (V D ): According to the refractive index test method, the refractive index at 25°C and wavelengths of 486nm, 589nm, and 656nm is tested respectively. The formula V D =(n D -1) / (n F -n C ) calculates the Abbe number, where n D is the refractive index at a wavelength of 589 nm, n F is the refractive index at a wavelength of 656 nm, n C is the refractive index at a wavelength of 486 nm.

[0099] 3) Detect the thermal properties of the sample film:

[0100] The heating rate was controlled at 10 °C / min in a nitrogen (N2) atmosphere, and the temperature was raised to 600 °C using a Mettler Toledo differential scanning calorimeter (TGA / DSC 3+) to obtain the glass transition temperature (T) of the sample film. g and thermal decomposition temperature M w .

[0101] Table 1 Reaction conditions and test results of Examples and Comparative Examples

[0102]

[0103] In Table 1, the addition ratio of the catalyst is specifically as follows: the amount of the catalyst is a percentage of the amount of the dithiol compound, for example, the amount of the catalyst imidazolyl lactate ionic liquid in Example 1 is 0.1 mol% of the amount of the dithiol compound 1,2-ethanedithiol. The test results in Table 1 show that the naphthyl high refractive index optical resin having a specific repeating unit provided by the present invention is superior to the copolycarbonate (n-butylene glycol) containing a bis-naphthol structure in the prior art. D =1.682), the refractive index is significantly improved, the refractive index of the naphthyl optical resin can reach up to 1.778, the Abbe number is up to 32, there is no obvious birefringence, and it has excellent optical properties. From the test results of comparative example 1, it can be seen that when no catalyst is added, the glass transition temperature and thermal decomposition temperature of the prepared polymer are relatively low, the stability is not good, and the weight-average molecular weight is also low, which leads to the mechanical strength and toughness of the prepared polymer being reduced and failing to meet the use requirements; from the test results of comparative example 2, it can be seen that when long-chain aliphatic dithiol 1,8-octanedithiol is used, the sulfur content, glass transition temperature, thermal decomposition temperature, weight-average molecular weight, refractive index and Abbe number of the prepared polymer are greatly reduced, which leads to the poor stability of the prepared polymer, and the mechanical strength and toughness do not meet the use requirements.

[0104] The present application also provides a use of the naphthyl high refractive index optical resin as described in any of the above items in the preparation of optical films, optical components, electronic products, electronic equipment, packaging materials or medical devices.

[0105] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0106] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0107] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A naphthyl high refractive index optical resin, characterized in that: The structural formula of the naphthyl high refractive index optical resin is: In formula (1), R1 is any aliphatic group or any aromatic group; The refractive index of the naphthyl high refractive index optical resin is 1.685 to 1.778; The weight average molecular weight of the naphthyl high refractive index optical resin is 2.24×10 4 ~8.92×10 4 g / mol.

2. The naphthyl high refractive index optical resin according to claim 1, characterized in that: The aliphatic groups include:

3. The naphthyl high refractive index optical resin according to claim 1, characterized in that: The aromatic groups include:

4. A method for preparing a naphthyl high refractive index optical resin as claimed in any one of claims 1 to 3, characterized in that: The following steps are involved: Dissolving the dithiol compound and bis-naphthol fluorene diacrylate in solvent A, adding a catalyst under nitrogen protection, stirring evenly, and performing Michael addition polymerization reaction under normal pressure, polymerization temperature of 0 to 120° C., and polymerization time of 1 to 24 hours to obtain a mixed solution; Then the mixed solution is added into solvent B for regeneration, and blocks are precipitated, and after washing and purification, a naphthyl high refractive index optical resin can be obtained; The reaction equation is: In formula (2), R1 is any aliphatic group or any aromatic group.

5. The method for preparing a naphthyl high refractive index optical resin according to claim 4, characterized in that: The molar ratio of the dithiol compound to the bis-naphthol fluorene diacrylate is 1:0.9-1.1; the molar ratio of the dithiol compound to the catalyst is 1:1×10 -4 ~1.5×10 -1 .

6. The method for preparing a naphthyl high refractive index optical resin according to claim 5, characterized in that: The amount of solvent A added is 2 to 32 times the total amount of bis-naphthol fluorene diacrylate and the dithiol compound added; the amount of solvent B added is 20 to 100 times the amount of solvent A added.

7. The method for preparing a naphthyl high refractive index optical resin according to claim 4, characterized in that: The solvent A is any one or more of dichloromethane, chloroform, 1,2-dichloroethane, tetrahydrofuran, cyclohexanone, dioxane, N,N-dimethylformamide, N,N-dimethylacetamide, N,N-dimethylpropylene urea, and N-methylpyrrolidone.

8. The method for preparing a naphthyl high refractive index optical resin according to claim 4, characterized in that: The solvent B is any one or more of methanol, ethanol, isopropanol, ether and water.

9. The method for preparing a naphthyl high refractive index optical resin according to claim 4, characterized in that: The catalyst is any one of ionic liquid catalysts or any one or more of organic base catalysts; The cations in the ionic liquid catalyst include: imidazole cations, quaternary ammonium cations, quaternary phosphine cations, piperidine cations and pyridine cations; the anions in the ionic liquid catalyst include: carboxylic acid anions, lactic acid anions, amino acid anions or amide anions; The organic base catalyst includes: triethylamine, tributylamine, pyridine, tetramethylguanidine, piperidine, piperazine, 1,8-diazabicyclo[5.4.0]undec-7-ene, 1,5,7-triazabicyclo[4.4.0]decene-5-ene, 1,5-diazabicyclo[4.3.0]non-5-ene, and 1,4-diazidebicyclo[2.2.2]octane.

10. Use of the naphthyl high refractive index optical resin according to any one of claims 1 to 3 in the preparation of optical films, optical components, electronic products, electrical equipment, packaging materials or medical devices.

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