Liquid crystal resin composition and camera module using same

Abstract

The invention provides a liquid crystal resin composition having good fluidity and a camera module using the same. The liquid crystal resin composition provides a molded body having excellent balance in terms of low dust generation, low sliding wear, low warpage, and suppression of inward tilt deformation. This liquid crystalline resin composition contains (A) a liquid crystalline resin, (B) a particulate filler, (C) a plate-like filler, and (D) an olefin polymer, the component (B) having a median diameter of 0.3-8 [mu] m, the component (C) having a median diameter of 10-50 [mu] m, the component (D) containing an epoxy group-containing olefin polymer, the content of the component (A) being 52-82 mass% with respect to the entire liquid crystalline resin composition, and the content of the component (B) being 50-70 mass% with respect to the entire liquid crystalline resin composition. The content of the component (B) is 2.5-35% by mass, the content of the component (C) is 5-35% by mass, the total content of the component (B) and the component (C) is 15-45% by mass, the content of the component (D) is 1.50-6.00% by mass, and the content of the epoxy group is 0.003-0.050% by mass.

Description

Technical Field

[0001] This invention relates to liquid crystal resin compositions and camera modules using the same. Background Technology

[0002] Liquid crystal resins possess a balanced combination of excellent mechanical strength, heat resistance, chemical resistance, and electrical properties, as well as excellent dimensional stability, making them widely used as high-performance engineering plastics. Recently, these properties have been leveraged in the application of liquid crystal resins to precision equipment components.

[0003] Examples of components using liquid crystal resins include connectors such as FPC connectors; sockets such as memory card sockets; camera module components such as lens holders; and relays. These components require excellent low warpage, mechanical strength, and low dust generation. Furthermore, they are sometimes used in a configuration where two or more components are in dynamic contact; therefore, reduced sliding wear (i.e., the ease of wear when two or more components are in dynamic contact) is also required. For example, Patent Document 1 discloses a liquid crystal resin composition containing a liquid crystal resin and talc having a specific volume average particle size, with the aim of providing a molded article formed from a liquid crystal resin composition that has excellent surface appearance and excellent sliding properties.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent No. 5087958 Summary of the Invention

[0007] The problem the invention aims to solve

[0008] If the dimensional accuracy of the aforementioned components is not ensured, they may sometimes malfunction. Therefore, to ensure dimensional accuracy, these components require excellent low warpage and suppression of inward tilting deformation. Furthermore, when molding the liquid crystal resin composition to obtain a molded article, the liquid crystal resin composition must have good flowability.

[0009] However, according to the research of the inventors, the conventional liquid crystal resin compositions have insufficient flowability, or there is room for improvement in terms of low dust generation, low sliding wear, low warpage, or suppression of inclination deformation of molded articles containing such liquid crystal resin compositions.

[0010] The present invention was made to solve the above-mentioned problems, and its object is to provide a liquid crystal resin composition with good flowability and a camera module using the same, wherein the liquid crystal resin composition provides a molded article with excellent balance in terms of low dust generation, low sliding wear, low warpage and suppression of inclination deformation.

[0011] Solution for solving the problem

[0012] The inventors have conducted repeated and in-depth research to solve the aforementioned problems. As a result, they discovered that by using a liquid crystal resin composition containing a liquid crystal resin, a specified granular filler, a specified plate-like filler, and an olefin polymer in a specific ratio, wherein the olefin polymer comprises an epoxy-containing olefin polymer, and the content of the epoxy groups is within a specified range, the aforementioned problems can be solved, thus completing the present invention. More specifically, the present invention provides the following solution.

[0013] (1) A liquid crystal resin composition comprising:

[0014] (A) Liquid crystal resin,

[0015] (B) Granular filler,

[0016] (C) Plate-shaped filler, and

[0017] (D) Olefin polymers

[0018] The median particle size of the granular filler (B) is 0.3–8 μm.

[0019] The median particle size of the plate-like filler (C) is 10–50 μm.

[0020] The (D) olefin polymers include epoxy-containing olefin polymers.

[0021] Relative to the liquid crystal resin composition as a whole,

[0022] The content of the liquid crystal resin (A) is 52-82% by mass.

[0023] The content of the granular filler (B) is 2.5% to 35% by mass.

[0024] The content of the (C) plate-shaped filler is 5-35% by mass.

[0025] The total content of the granular filler (B) and the plate-like filler (C) is 15-45% by mass.

[0026] The content of the (D) olefin polymer is 1.50–6.00% by mass.

[0027] The content of the epoxy groups is 0.003 to 0.050 by mass.

[0028] (2) The liquid crystal resin composition according to (1), wherein the liquid crystal resin (A) is an aromatic polyester or aromatic polyesteramide having structural units derived from at least one of the group consisting of aromatic hydroxycarboxylic acids and their derivatives as constituent components.

[0029] (3) The liquid crystal resin composition according to (1) or (2), wherein the (B) granular filler comprises one or more selected from the group consisting of silicon dioxide and barium sulfate.

[0030] The (C) plate-shaped filler comprises one or more selected from the group consisting of talc and mica.

[0031] (4) The liquid crystal resin composition according to any one of (1) to (3) is used in a camera module component.

[0032] The use of any one of (5)(1) to (4) liquid crystal resin compositions in the manufacture of camera module components.

[0033] (6) A molded article comprising any one of (1) to (4) a liquid crystal resin composition.

[0034] (7) A camera module component comprising the shaped body described in (6).

[0035] (8) A camera module comprising the camera module components described in (7).

[0036] The effects of the invention

[0037] According to the present invention, a liquid crystal resin composition with good flowability and a camera module using the same can be provided, wherein the liquid crystal resin composition provides a molded article with excellent balance in terms of low dust generation, low sliding wear, low warpage, and suppression of inclination deformation. Attached Figure Description

[0038] Figure 1 This is a schematic cross-sectional view of a typical camera module.

[0039] Figure 2 This is a diagram used to illustrate the method for evaluating low sliding wear.

[0040] Figure 3 (a) is a diagram showing a camera module molded article used in the warpage assessment. Figure 3 (b) is a diagram showing the measurement locations in the evaluation of warpage. It should be noted that the values ​​in the diagram are in mm.

[0041] Figure 4 (a) is a perspective view showing the U-shaped liquid crystal resin molded body used in the inclination deformation evaluation performed in the embodiment. Figure 4 (b) is a side view showing the above-mentioned Ko-shaped liquid crystal resin molded body. Detailed Implementation

[0042] The following describes one embodiment of the present invention. It should be noted that the present invention is not limited to the following embodiment.

[0043] Liquid crystal resin composition for camera modules

[0044] The liquid crystal resin composition for camera modules of the present invention comprises: (A) a liquid crystal resin, (B) a granular filler, (C) a plate-like filler, and (D) an olefin polymer.

[0045] [(A) Liquid crystal resin]

[0046] The liquid crystal resin used in this invention (A) refers to a melt-processable polymer that has the property of forming an optically anisotropic molten phase. The properties of the anisotropic molten phase can be confirmed by conventional polarized light detection using orthogonal polarizers. More specifically, the confirmation of the anisotropic molten phase can be performed by observing a molten sample placed on a Leitz hot stage at 40x magnification under a nitrogen atmosphere using a Leitz polarizing microscope. When the liquid crystal polymer applicable to this invention is tested between orthogonal polarizers, polarized light typically transmits even in a molten, stationary state, exhibiting optical anisotropy.

[0047] The type of liquid crystal resin (A) described above is not particularly limited, but aromatic polyesters and / or aromatic polyesteramides are preferred. Additionally, polyesters that partially contain aromatic polyesters and / or aromatic polyesteramides in the same molecular chain are also within this range. As the liquid crystal resin (A), a liquid crystal resin that, when dissolved in pentafluorophenol at a concentration of 0.1% by mass at 60°C, preferably has a logarithmic viscosity (IV) of at least about 2.0 dl / g, more preferably 2.0 to 10.0 dl / g.

[0048] The aromatic polyester or aromatic polyesteramide that is suitable as the liquid crystal resin of (A) of the present invention is particularly preferred to be an aromatic polyester or aromatic polyesteramide having at least one structural unit derived from the group consisting of aromatic hydroxycarboxylic acids and their derivatives as a constituent component.

[0049] More specifically, the following can be listed:

[0050] (1) A polyester mainly composed of structural units derived from at least one of the group consisting of aromatic hydroxycarboxylic acids and their derivatives;

[0051] (2) A polyester mainly composed of (a) structural units derived from at least one of the group consisting of aromatic hydroxycarboxylic acids and their derivatives, and (b) structural units derived from at least one of the group consisting of aromatic dicarboxylic acids, alicyclic dicarboxylic acids and their derivatives;

[0052] (3) A polyester mainly composed of (a) structural units derived from at least one of the group consisting of aromatic hydroxycarboxylic acids and their derivatives, (b) structural units derived from at least one of the group consisting of aromatic dicarboxylic acids, alicyclic dicarboxylic acids and their derivatives, and (c) structural units derived from at least one of the group consisting of aromatic diols, alicyclic diols, aliphatic diols and their derivatives;

[0053] (4) A polyesteramide mainly composed of (a) a structural unit derived from at least one of the group consisting of aromatic hydroxycarboxylic acids and their derivatives, (b) a structural unit derived from at least one of the group consisting of aromatic hydroxyamines, aromatic diamines and their derivatives, and (c) a structural unit derived from at least one of the group consisting of aromatic dicarboxylic acids, alicyclic dicarboxylic acids and their derivatives.

[0054] (5) Polyesteramides mainly composed of (a) structural units derived from at least one of the group consisting of aromatic hydroxycarboxylic acids and their derivatives, (b) structural units derived from at least one of the group consisting of aromatic hydroxyamines, aromatic diamines and their derivatives, (c) structural units derived from at least one of the group consisting of aromatic dicarboxylic acids, alicyclic dicarboxylic acids and their derivatives, and (d) structural units derived from at least one of the group consisting of aromatic diols, alicyclic diols, aliphatic diols and their derivatives. Furthermore, a molecular weight regulator may be used in conjunction with the above-mentioned components as needed.

[0055] In the liquid crystal resin (A), from the viewpoint of suppressing molecular structure changes of the liquid crystal resin (A) to a low degree, the content of at least one structural unit derived from the group consisting of aromatic hydroxycarboxylic acids and their derivatives is preferably 45 mol% or more, more preferably 50 mol% or more, even more preferably 55 mol% or more, even more preferably 60 mol% or more, and particularly preferably 62 mol% or more, relative to all structural units. The upper limit of the above content is not particularly limited, and may be 100 mol% or less, or 90 mol% or less, 80 mol% or less, 75 mol% or less, or 70 mol% or less, relative to all structural units.

[0056] Preferred examples of specific compounds constituting the liquid crystal resin (A) applicable to the present invention include: aromatic hydroxycarboxylic acids such as 4-hydroxybenzoic acid and 6-hydroxy-2-naphthoic acid; aromatic diols such as 2,6-dihydroxynaphthalene, 1,4-dihydroxynaphthalene, 4,4'-dihydroxybiphenyl, hydroquinone, resorcinol, compounds of general formula (I) and compounds of general formula (II); aromatic dicarboxylic acids such as 1,4-phenylene dicarboxylic acid, 1,3-phenylene dicarboxylic acid, 4,4'-diphenyl dicarboxylic acid, 2,6-naphthoic dicarboxylic acid and compounds of general formula (III); and aromatic amines such as p-aminophenol, p-phenylenediamine, and N-acetyl-p-aminophenol. From the viewpoint of reactivity and the stability of the molecular structure of the liquid crystal resin (A), 4-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, or combinations thereof are preferred among the aforementioned aromatic hydroxycarboxylic acids and their derivatives.

[0057]

[0058] (X: a group selected from alkylene (C1-C4), alkylidene, -O-, -SO-, -SO2-, -S-, and -CO-.)

[0059]

[0060]

[0061] (Y: Selected from -(CH2)) n -(n=1~4) and -O(CH2) n Groups in O-(n=1~4).

[0062] The (A) liquid crystal resin used in this invention can be prepared by direct polymerization or transesterification of the aforementioned monomeric compounds (or mixtures of monomers) using known methods, typically melt polymerization, solution polymerization, slurry polymerization, solid-phase polymerization, or combinations thereof, with melt polymerization or a combination of melt polymerization and solid-phase polymerization being preferred. The aforementioned compounds with esterifying ability can be used directly for polymerization, or, alternatively, the precursor can be modified into the esterifying derivative in the pre-polymerization stage. Various catalysts can be used in these polymerizations; representative catalysts include metal salt catalysts such as potassium acetate, magnesium acetate, stannous acetate, tetrabutyl titanate, lead acetate, sodium acetate, antimony trioxide, and tris(2,4-pentanedione)cobalt(III), as well as organic compound catalysts such as 1-methylimidazole and 4-dimethylaminopyridine. The amount of catalyst used is typically about 0.001 to 1% by mass relative to the total mass of the monomers, and particularly preferably about 0.01 to 0.2% by mass. Polymers produced using these polymerization methods can be further polymerized to increase their molecular weight as needed through solid-phase polymerization under reduced pressure or inert gas.

[0063] The melt viscosity of the liquid crystal resin (A) obtained by the method described above is not particularly limited. Generally, the melt viscosity at the molding temperature and a shear rate of 1000 sec can be used. -1 The liquid crystal resin is defined as having a viscosity of 3 Pa·s or higher and 500 Pa·s or lower. However, resins with excessively high viscosity have very poor flowability and are therefore not preferred. It should be noted that the liquid crystal resin described in (A) above can be a mixture of two or more liquid crystal resins.

[0064] Relative to the overall liquid crystal resin composition of the present invention, the content of liquid crystal resin (A) is preferably 52 to 82% by mass, more preferably 53 to 75% by mass, and even more preferably 54 to 70% by mass. If the content of component (A) is within the above range, it is preferred in terms of flowability, heat resistance, etc.

[0065] [(B) Granular filler]

[0066] The liquid crystal resin composition of the present invention comprises (B) a particulate filler. The median particle size of the (B) particulate filler is 0.3 to 8.0 μm. If the median particle size is 0.3 μm or more, the mechanical strength of the molded article is easily maintained. If the median particle size is 8.0 μm or less, the flowability of the liquid crystal resin composition becomes good. The median particle size is preferably 0.4 to 7.5 μm, more preferably 0.5 to 7.0 μm. It should be noted that, in this specification, the median particle size of the (B) particulate filler refers to the median value of the volume reference measured by laser diffraction / scattering particle size distribution measurement method. The median particle size can be measured, for example, using a HORIBA, Ltd. laser diffraction / scattering particle size distribution measurement device LA-920. The median particle size of the (B) particulate filler in the liquid crystal resin composition is determined by applying the above method to the (B) particulate filler remaining after the liquid crystal resin composition has been ashed by heating at 600°C for 2 hours. (B) Granular fillers can be used alone or in combination of two or more.

[0067] Examples of particulate fillers (B) include silica, quartz powder, glass microspheres, glass powder, potassium aluminum silicate, diatomaceous earth, iron oxides, titanium dioxide, zinc oxide, aluminum oxide, and other metal oxides; calcium carbonate, magnesium carbonate, and other metal carbonates; calcium sulfate, barium sulfate, and other metal sulfates; calcium pyrophosphate, anhydrous calcium hydrogen phosphate, and other phosphates; silicon carbide; silicon nitride; boron nitride, etc. In this invention, from the viewpoint of suppressing inward deformation of the molded body, it is preferable to use one or more fillers selected from the group consisting of silica and barium sulfate as particulate fillers (B), and silica is more preferably used.

[0068] The content of component (B) is 2.5 to 35% by mass relative to the total liquid crystal composition of the present invention. If the content of component (B) is 2.5% by mass or more, it is easy to suppress the inclination deformation of the molded article. If the content of component (B) is 35% by mass or less, the flowability of the liquid crystal resin composition is easily improved. The content of component (B) is preferably 4 to 25% by mass, more preferably 5 to 21% by mass.

[0069] [(C) Plate-shaped filler]

[0070] The liquid crystal resin composition of the present invention comprises (C) a plate-shaped filler. By comprising (C) a plate-shaped filler in the liquid crystal resin composition of the present invention, the low dust generation and low warpage of the molded article are easily improved. (C) A plate-shaped filler may be used alone or in combination of two or more.

[0071] (C) The median particle size of the plate-like filler is 10–50 μm. If the median particle size is within this range, the flowability of the liquid crystal resin composition tends to be good, and the molded body containing the liquid crystal resin composition tends to maintain low warpage. The median particle size is preferably 11–40 μm, more preferably 12–30 μm. It should be noted that, in this specification, the median particle size of the (C) plate-like filler refers to the median value of the volume reference determined by laser diffraction / scattering particle size distribution measurement. The median particle size can be measured, for example, using a HORIBA, Ltd. laser diffraction / scattering particle size distribution measurement device LA-920. The median particle size of the (C) plate-like filler in the liquid crystal resin composition is determined by applying the above method to the (C) plate-like filler remaining after ashing by heating the liquid crystal resin composition at 600°C for 2 hours.

[0072] Examples of the (C) plate-shaped filler in this invention include talc, mica, glass flakes, and various metal foils. From the viewpoint of not deteriorating the flowability of the liquid crystal resin composition and suppressing the anisotropy of the molded article obtained from the liquid crystal resin composition, it is preferable to select one or more from the group consisting of talc and mica, and more preferably mica.

[0073] 〔talc〕

[0074] As for the talc that can be used in this invention, it is preferable that, relative to the total solid content of the talc, the total content of Fe2O3, Al2O3 and CaO is 2.5% by mass or less, the total content of Fe2O3 and Al2O3 is more than 1.0% by mass but less than 2.0% by mass, and the content of CaO is less than 0.5% by mass. That is, in addition to SiO2 and MgO, which are its main components, the talc that can be used in this invention may also contain at least one of Fe2O3, Al2O3 and CaO, and each component may be contained within the above-mentioned content range.

[0075] If the total content of Fe2O3, Al2O3, and CaO in the talc is 2.5% by mass or less, the processability of the liquid crystal resin composition and the heat resistance of the molded articles formed from the liquid crystal resin composition are less likely to deteriorate. Therefore, the total content of Fe2O3, Al2O3, and CaO is preferably 1.0% by mass or more and 2.0% by mass or less.

[0076] Furthermore, talc containing a total Fe2O3 and Al2O3 content exceeding 1.0% by mass is readily available. Additionally, if the total Fe2O3 and Al2O3 content in the talc is 2.0% by mass or less, the processability of the liquid crystal resin composition and the heat resistance of the molded article formed from the liquid crystal resin composition are less likely to deteriorate. Therefore, the total Fe2O3 and Al2O3 content is preferably exceeding 1.0% by mass and below 1.7% by mass.

[0077] Furthermore, if the CaO content in the talc is less than 0.5% by mass, the processability of the liquid crystal resin composition and the heat resistance of the molded article formed from the liquid crystal resin composition are less likely to deteriorate. Therefore, the CaO content is preferably 0.01% by mass or more and 0.4% by mass or less.

[0078] [Mica]

[0079] Mica refers to the pulverized silicate minerals containing aluminum, potassium, magnesium, sodium, iron, etc. Examples of mica that can be used in this invention include muscovite, phlogopite, biotite, and synthetic mica, among which muscovite is preferred due to its good color and low price.

[0080] In mica manufacturing, known methods for pulverizing minerals include wet pulverization and dry pulverization. Wet pulverization involves coarsely pulverizing raw mica using a dry pulverizer, then adding water and performing primary pulverization in a slurry state using a wet pulverizer, followed by dehydration and drying. Compared to wet pulverization, dry pulverization is a lower-cost and more common method; however, wet pulverization makes it easier to pulverize the mineral into thinner and finer pieces. For the purpose of obtaining mica with the aforementioned median particle size and the preferred thickness described later, thin and fine pulverized material is preferred in this invention. Therefore, in this invention, mica obtained by wet pulverization is preferred.

[0081] Furthermore, in wet grinding, since the process requires dispersing the material in water, flocculants and / or settling aids are typically added to the material to improve dispersion efficiency. Examples of flocculants and settling aids that can be used in this invention include polyaluminum chloride, aluminum sulfate, ferrous sulfate, ferric sulfate, ferrous sulfate, polyferric sulfate, polyferric chloride, iron-silica inorganic polymeric flocculants, ferric chloride-silica inorganic polymeric flocculants, quicklime (Ca(OH)2), caustic soda (NaOH), and soda ash (Na2CO3). These flocculants and settling aids have an alkaline or acidic pH. The mica used in this invention is preferably processed without the use of flocculants and / or settling aids during wet grinding. If mica that has not been treated with flocculants and / or settling aids is used, the polymer in the liquid crystal resin composition is less likely to decompose, less likely to generate a large amount of gas, and less likely to cause a decrease in the molecular weight of the polymer. Therefore, it is easier to maintain the properties of the resulting molded article.

[0082] Regarding the thickness of the mica that can be used in this invention, the thickness measured by electron microscopy is preferably 0.01 to 1 μm, and particularly preferably 0.03 to 0.3 μm. If the mica thickness is 0.01 μm or more, the mica is less likely to break during the melt processing of the liquid crystal resin composition, thus potentially improving the rigidity of the molded article, which is therefore preferred. If the mica thickness is 1 μm or less, the improvement effect on the rigidity of the molded article is more easily achieved, which is also preferred.

[0083] The mica used in this invention can be surface-treated with silane coupling agents or the like, and / or granulated with binders to form granules.

[0084] The content of component (C) is 5 to 35% by mass relative to the total liquid crystal resin composition of the present invention, preferably 8 to 25% by mass, and more preferably 10 to 21% by mass. If the content of component (C) is within the above range, the molded article containing the liquid crystal resin composition can easily maintain low dust generation and low warpage.

[0085] The total content of (B) granular filler and (C) plate-shaped filler is 15 to 45% by mass relative to the total liquid crystal resin composition, preferably 20 to 43% by mass, and more preferably 25 to 41% by mass. If the total content is within the above range, the molded article containing the liquid crystal resin composition easily achieves excellent balance in terms of low dust generation, low sliding wear, low warpage, and suppression of inclination deformation.

[0086] [(D) Olefin polymers]

[0087] The liquid crystal resin composition of the present invention contains (D) olefin polymers. The (D) olefin polymers can be used alone or in combination of two or more. The (D) olefin polymers are not particularly limited as long as they include epoxy-containing olefin polymers; they can be epoxy-containing olefin polymers alone or in combination with epoxy-free olefin polymers. The (D) olefin polymers contribute to giving the liquid crystal resin composition of the present invention good flowability, resulting in molded articles containing the liquid crystal resin composition of the present invention exhibiting excellent balance in terms of low dust generation, low sliding wear, low warpage, and suppression of inward tilting deformation.

[0088] (Olefin polymers containing epoxy groups)

[0089] Examples of epoxy-containing olefin polymers include copolymers composed of repeating units derived from α-olefins and repeating units derived from glycidyl esters of α,β-unsaturated acids. Epoxy-containing olefin polymers can be used alone or in combination of two or more.

[0090] α-Alkenes are not particularly limited; examples include ethylene, propylene, and butene, with ethylene being preferred. Glycidyl esters of α,β-unsaturated acids are represented by the following general formula (IV). In the following general formula (IV), R' represents a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, or -R. 1 The group represented by -COOH, R 1 This refers to an alkylene group having 1 to 5 carbon atoms. Glycidyl esters of α,β-unsaturated acids include, for example, glycidyl acrylate, glycidyl methacrylate, glycidyl ethyl acrylate, glycidyl itaconic acid, etc., with glycidyl methacrylate being particularly preferred.

[0091]

[0092] In epoxy-containing olefin polymers, the content of repeating units derived from α-olefins is preferably 87-98% by mass, and the content of repeating units derived from glycidyl esters of α,β-unsaturated acids is 13-2% by mass.

[0093] Without prejudice to the present invention, in addition to the two components mentioned above, the epoxy-containing olefin polymer may also contain one or more repeating units derived from olefinic unsaturated monomers such as acrylonitrile, acrylate, methacrylate, α-methylstyrene, and maleic anhydride as a third component, in an amount of 0 to 48 parts by mass relative to 100 parts by mass of the two components.

[0094] Epoxy-containing olefin polymers can be readily prepared using monomers corresponding to each component and free radical polymerization catalysts via conventional free radical polymerization methods. More specifically, they can typically be manufactured by copolymerizing α-olefins with glycidyl esters of α,β-unsaturated acids in the presence of a free radical generator, at 500–4000 atm, and at 100–300°C, with or without a suitable solvent and chain transfer agent. Alternatively, they can be manufactured by melt graft copolymerization in an extruder of α-olefins with glycidyl esters of α,β-unsaturated acids and a free radical generator.

[0095] (Olefin polymers without epoxy groups)

[0096] Examples of olefin-based polymers that do not contain epoxy groups include polyethylene, polypropylene, polybutene, ethylene-propylene copolymer, ethylene-butene copolymer, ethylene-octene copolymer, polybutadiene, polyisoprene, polychloroprene, ethylene-propylene-butadiene copolymer, ethylene-propylene-isoprene copolymer, ethylene-propylene-chloroprene copolymer, ethylene-ethyl acrylate copolymer, and ethylene-vinyl acetate copolymer. From the viewpoint of the flowability of the liquid crystal resin composition and the mechanical strength of the molded article, polyethylene is preferred.

[0097] Examples of polyethylene include high-density polyethylene, low-density polyethylene, ultra-low-density polyethylene, linear low-density polyethylene, and ultra-high molecular weight polyethylene. From the viewpoint of the flowability of the liquid crystal resin composition and the mechanical strength of the molded article, low-density polyethylene is preferred.

[0098] Without prejudice to the invention, the epoxy-free olefin polymer may contain one or more repeating units derived from olefinic unsaturated monomers such as acrylonitrile, acrylates, methacrylates, α-methylstyrene, and maleic anhydride. The epoxy-free olefin polymer may use one type alone or in combination of two or more types.

[0099] The content of the olefin polymer (D) relative to the total liquid crystal resin composition of the present invention is 1.50 to 6.00% by mass, preferably 2.00 to 6.00% by mass, and more preferably 3.00 to 6.00% by mass. If the content of component (D) is within the above range, the flowability of the liquid crystal resin composition tends to be good, and the molded article containing this liquid crystal resin composition tends to exhibit excellent balance in terms of low dust generation, low sliding wear, low warpage, and suppression of inclination deformation. It should be noted that the upper limit of the content of component (D) can be 5.50% by mass or 5.00% by mass, and the content of component (D) can be 1.50 to 5.50% by mass, 2.00 to 5.50% by mass, 3.00 to 5.50% by mass, 1.50 to 5.00% by mass, 2.00 to 5.00% by mass, or 3.00 to 5.00% by mass.

[0100] In the liquid crystal resin composition, the content of epoxy groups is 0.003 to 0.050% by mass relative to the total liquid crystal resin composition, preferably 0.010 to 0.048% by mass, and more preferably 0.018 to 0.045% by mass. When the content of epoxy groups is within the above range, the flowability of the liquid crystal resin composition tends to be good, and the molded article containing this liquid crystal resin composition tends to exhibit excellent balance in terms of low dust generation, low sliding wear, low warpage, and suppression of inclination deformation.

[0101] The content of (C) olefin polymers and the content of epoxy groups in the liquid crystal resin composition can be adjusted to the desired range by appropriately increasing or decreasing the content of epoxy groups in (C) olefin polymers, the content of epoxy-containing olefin polymers, and the content of epoxy-free olefin polymers.

[0102] [(E) Carbon Black]

[0103] In this invention, the (E) carbon black used as an arbitrary component is not particularly limited as long as it is a commonly available carbon black used for resin coloring. Typically, the (E) carbon black contains lumps formed by primary particle aggregation, but as long as it does not contain a significant amount of lumps larger than 50 μm, a large number of pits (fine bumps formed by carbon black aggregation) are less likely to form on the surface of the molded article formed from the resin composition of this invention. If the content of the aforementioned lumps with a particle size of 50 μm or larger is 20 ppm or less, the effect of suppressing fuzzing on the surface of the molded article is easily improved. A preferred content is 5 ppm or less.

[0104] The content of carbon black (E) is preferably in the range of 0.5% to 5% by mass relative to the total liquid crystal resin composition. If the carbon black content is 0.5% by mass or more, the blackness of the resulting resin composition is less likely to decrease, and the opacity is less likely to be compromised. If the carbon black content is 5% by mass or less, it is less likely to become uneconomical, and pinholes are less likely to occur. The content of carbon black (E) is more preferably 1% to 4% by mass, and even more preferably 2% to 3% by mass.

[0105] [Other ingredients]

[0106] In the liquid crystal resin composition of the present invention, other polymers, other fillers, known substances commonly added to synthetic resins, such as antioxidants, UV absorbers and other stabilizers, antistatic agents, flame retardants, dyes, pigments and other colorants, lubricants, release agents, crystallization promoters, crystallization nucleating agents, etc., may be appropriately added according to the desired performance without impairing the effects of the present invention.

[0107] Other polymers include, for example, epoxy-containing styrene polymers. Examples of epoxy-containing styrene polymers include known epoxy-containing styrene polymers, including copolymers composed of repeating units derived from styrene and repeating units derived from glycidyl esters of α,β-unsaturated acids. Other fillers refer to fillers other than (B) granular fillers, (C) sheet fillers, and (E) carbon black, such as fibrous fillers like glass fibers.

[0108] [Preparation of Liquid Crystal Resin Compositions]

[0109] The preparation of the resin composition of the present invention is not particularly limited. For example, the liquid crystal resin composition is prepared by mixing the above-mentioned components (A), (B), (C), (D), optional component (E), and optional other components, and then melt-blending them using a single-screw or twin-screw extruder.

[0110] [Liquid Crystal Resin Composition]

[0111] From the viewpoint of fluidity, the melt viscosity of the liquid crystal resin composition of the present invention obtained as described above is preferably 60 Pa·s or less, more preferably 58 Pa·s or less, and even more preferably 57 Pa·s or less. The lower limit of the above melt viscosity is not particularly limited; it can be 5 Pa·s or more, 10 Pa·s or more, or 20 Pa·s or more. High fluidity and excellent formability during melting are also characteristics of the liquid crystal resin composition of the present invention. In this specification, the melt viscosity is determined by a barrel temperature 10–30°C higher than the melting point of the liquid crystal resin and a shear rate of 1000 sec. -1 The value was obtained under the conditions determined according to the method of ISO 11443.

[0112] <Camera module components and camera module>

[0113] The above-described liquid crystal resin composition can be used for camera module components. More specifically, the above-described liquid crystal resin composition can be used to manufacture camera module components. That is, camera module components can be manufactured using the above-described liquid crystal resin composition. If the resin composition of the present invention is used as a raw material, the surface of the camera module component is less prone to fuzzing. The camera module component is ultrasonically cleaned, so it is required that the surface is not prone to fuzzing even after ultrasonic cleaning. If the resin composition of the present invention is used, even if the camera module component is ultrasonically cleaned under stronger conditions, it is less likely to produce flaking material that causes dust or the like. In addition, the molded body containing the liquid crystal resin composition of the present invention has excellent low sliding wear properties, so when the components slide against each other, it is less likely to produce flaking material that causes dust or the like on the surface of the camera module component manufactured using this liquid crystal resin composition. Therefore, after the camera module component is assembled onto the finished product, dust generated due to fuzzing or sliding wear of the camera module component is less likely to affect the quality of the finished product. It should be noted that the above-described molded body can be obtained by molding the liquid crystal resin composition of the present invention. As for the molding method, there is no particular limitation, injection molding is an example.

[0114] A camera module component having a molded body comprising the liquid crystal resin composition of the present invention will be described. Figure 1 A cross-section of a typical camera module is schematically shown. (Example) Figure 1 As shown, the camera module 1 includes a substrate 10, an imaging element 11, lead wiring 12, a lens bracket 13, a lens barrel 14, a lens 15, an IR filter 16, a guide 17, a base 18, a coil 19, a permanent magnet 20, a magnetic yoke 21, and a cover 22.

[0115] The imaging element 11 is disposed on the substrate 10, and the imaging element 11 and the substrate 10 are electrically connected by lead wiring 12.

[0116] A guide 17 is disposed on a substrate 10, a base 18 is disposed on the guide 17, and a lens holder 13 is disposed on the base 18 in a manner that allows it to move up and down. A coil 19 is wound on the lens holder 13. The lens holder 13 has an opening at its top, and a spiral groove is formed on the wall of the opening. The guide 17 has an opening at its top, and an IR filter 16 is disposed on the guide 17 to close the opening. The guide 17 and the IR filter 16 cover the imaging element 11. A yoke 21 is disposed on the base 18, a permanent magnet 20 contacts the inner side of the yoke 21, and a cover 22 with an opening at its top is disposed on the yoke 21. The permanent magnet 20 is disposed around the coil 19.

[0117] The lens barrel 14 is cylindrical, and the lens 15 is held approximately horizontally inside the cylinder. Furthermore, a spiral protrusion is formed on the side wall of one end of the cylinder. This spiral protrusion engages with a spiral groove formed on the opening wall of the lens holder 13, thereby connecting the lens barrel 14 to the lens holder 13. Figure 1 As shown, the IR filter 16 and lens 15 are arranged in approximately parallel. It should be noted that leaf springs (not shown) are connected between the top of the lens holder 13 and the top of the magnetic yoke 21, and between the bottom of the lens holder 13 and the top of the base 18, thereby holding the lens holder 13 and the lens barrel 14, lens 15 and coil 19 within the camera module 1 by means of the lens holder 13.

[0118] exist Figure 1 In the camera module 1 shown, the lens holder 13 moves up and down on the base 18 by the magnetic force generated by the coil 19 wound around the lens holder 13 and the action of the permanent magnet 20 disposed around the coil 19, thereby changing the distance between the lens 15 and the imaging element 11. By adjusting this distance, the focus of the camera can be adjusted.

[0119] In the camera module 1 described above, the liquid crystal resin composition of the present invention can be used as a raw material to manufacture the lens holder 13, guide 17, and / or base 18, which are components of the camera module. Ordinary liquid crystal resin compositions are not suitable as raw materials for manufacturing these components. If the lens holder 13, guide 17, and / or base 18 are manufactured using ordinary liquid crystal resin compositions as raw materials, the following problems will occur.

[0120] Molded bodies formed from conventional liquid crystal resin compositions are prone to surface fuzzing due to the particularly large molecular orientation of the polymer on the surface. This fuzzing contributes to the generation of fine dust particles. If these fine dust particles adhere to the lens 15, etc., the performance of the camera module will be degraded.

[0121] Camera module components such as lens holder 13, guide 17, and base 18 are ultrasonically cleaned before assembly into camera module 1 to remove surface dust and fine particles. However, the surface of molded bodies formed from conventional liquid crystal resin compositions is prone to fuzzing, resulting in surface fuzzing during ultrasonic cleaning. Due to this problem, ultrasonic cleaning is generally not possible for molded bodies formed from liquid crystal resin compositions.

[0122] The aforementioned focus adjustment is performed as follows: the lens holder 13 moves up and down on the base 18 by the magnetic force generated by the coil 19 wound around the lens holder 13 and the action of the permanent magnet 20 disposed around the coil, thereby adjusting the focus. At this time, as described above, the surface of the molded body formed from a typical liquid crystal resin composition is prone to fuzzing, and therefore the surface may peel off, producing delamination. This delamination, becoming small dust particles, is highly likely to adhere to the lens 15, etc., thus degrading the performance of the camera module.

[0123] As described above, when liquid crystal resin compositions are typically used as raw materials for lens holder 13, guide 17, and / or base 18, defects are easily generated. On the other hand, molded articles containing the liquid crystal resin composition of the present invention are less prone to fuzzing even after ultrasonic cleaning, and the surface condition is improved. In addition, on the surface of camera module components manufactured using the liquid crystal resin composition of the present invention, less shedding material, such as dust, is generated when the components slide against each other. Therefore, the liquid crystal resin composition of the present invention can be preferably used as a raw material for lens holder 13, guide 17, and / or base 18.

[0124] Example

[0125] The following examples illustrate the present invention in more detail, but the present invention is not limited to these examples.

[0126] Liquid crystal resins

[0127] Aromatic polyesteramide resin

[0128] After adding the following raw materials to the polymerization vessel, the temperature of the reaction system was raised to 140°C, and the reaction was carried out at 140°C for 1 hour. Then, the temperature was further raised to 340°C over 4.5 hours, and then the pressure was reduced to 10 Torr (i.e., 1330 Pa) over 15 minutes, allowing acetic acid, excess acetic anhydride, and other low-boiling-point components to distill off while melt polymerization was carried out. Once the stirring torque reached the specified value, nitrogen gas was introduced, and the pressure was increased from reduced pressure to atmospheric pressure, allowing the polymer to be discharged from the bottom of the polymerization vessel, granulating the filament into granules. The obtained granules were heat-treated under a nitrogen gas flow at 300°C for 2 hours to obtain the target polymer. The melting point of the obtained polymer was 336°C, and the melt viscosity at 350°C was 19.0 Pa·s. It should be noted that the melt viscosity of the above polymer was measured using the same method as described later for measuring melt viscosity.

[0129] 4-Hydroxybenzoic acid (HBA): 1380g (60 mol%)

[0130] 6-Hydroxy-2-naphthoic acid (HNA): 157g (5 mol%)

[0131] 1,4-Phenylidene dicarboxylic acid (TA): 484g (17.5 mol%)

[0132] 4,4'-Dihydroxybiphenyl (BP): 388g (12.5 mol%)

[0133] N-acetyl-p-aminophenol (APAP): 126g (5 mol%)

[0134] Metal catalyst (potassium acetate catalyst): 110 mg

[0135] Acylating agent (acetic anhydride): 1659g

[0136] Aromatic polyester resin

[0137] After adding the following raw materials to the polymerization vessel, the temperature of the reaction system was raised to 140°C, and the reaction was carried out at 140°C for 1 hour. Then, the temperature was further raised to 330°C over 3.5 hours, and then the pressure was reduced to 10 Torr (i.e., 1330 Pa) over 15 minutes, allowing acetic acid, excess acetic anhydride, and other low-boiling-point components to distill off while melt polymerization was carried out. Once the stirring torque reached the specified value, nitrogen gas was introduced, and the pressure was increased from reduced pressure to atmospheric pressure, allowing the polymer to be discharged from the bottom of the polymerization vessel, thus granulating the filament to obtain the target polymer. The resulting polymer had a melting point of 323°C and a melt viscosity of 38.3 Pa·s at 340°C. It should be noted that the melt viscosity of the above polymer was measured using the same method as described later for measuring melt viscosity.

[0138] 4-Hydroxybenzoic acid (HBA): 2524g (79.3 mol%)

[0139] 6-Hydroxy-2-naphthoic acid (HNA): 867g (20 mol%)

[0140] 1,4-Phenylidene dicarboxylic acid (TA): 27g (0.7 mol%)

[0141] Metal catalyst (potassium acetate catalyst): 150 mg

[0142] Acylating agent (acetic anhydride): 2336g

[0143] [Methods for determining melting point]

[0144] Using a DSC manufactured by TA Instruments, the temperature of the endothermic peak (Tm1) observed when the liquid crystal resin was heated from room temperature at a rate of 20°C / min was measured. After holding at (Tm1+40)°C for 2 minutes, the resin was temporarily cooled to room temperature at a rate of 20°C / min. The temperature of the endothermic peak (Tm2) observed when the resin was heated again at a rate of 20°C / min was then measured and taken as the melting point of the polymer.

[0145] <Materials other than liquid crystal resins>

[0146] • Mica: AB-25S (manufactured by YAMAGUCHI MICA CO., LTD., mica, median particle size 25.0 μm)

[0147] • Silica: Denka fused silica FB-5SDC (manufactured by Denka Company, silica, median particle size 4.0μm)

[0148] • Carbon black: VULCAN XC305 (manufactured by Cabot Japan KK, with an average particle size of 20nm and a particle size greater than 50μm of less than 20ppm)

[0149] • Ethylene-glycidyl methacrylate copolymer 1: Bond Fast BF-2C (manufactured by Sumitomo Chemical Co., Ltd., ethylene-glycidyl methacrylate copolymer, glycidyl methacrylate content 6% by mass)

[0150] • Ethylene-glycidyl methacrylate copolymer 2: Bond Fast BF-7L (manufactured by Sumitomo Chemical Co., Ltd., ethylene-glycidyl methacrylate-methyl acrylate copolymer, glycidyl methacrylate content 3% by mass, methyl acrylate content 27% by mass)

[0151] • Olefin polymers without epoxy groups: Excellen G201-M (manufactured by Sumitomo Chemical Co., Ltd., low-density polyethylene)

[0152] <Preparation of Liquid Crystal Resin Compositions>

[0153] The above components were melt-blended at the proportions (mass %) shown in Table 1 or Table 2 using a twin-screw extruder (Japan SteelWorks, LTD. TEX30α type) at the following barrel temperatures to obtain liquid crystal resin composition granules.

[0154] [Manufacturing conditions]

[0155] Barrel temperature:

[0156] 350°C: Case of liquid crystal resin composition containing the above-mentioned aromatic polyesteramide resin

[0157] 340°C: Case of a liquid crystal resin composition containing the above-mentioned aromatic polyester resin

[0158] Melt viscosity

[0159] Using a capillary rheometer type 1B manufactured by Toyo Seiki Co., Ltd., at a temperature 10–30°C higher than the melting point of the liquid crystal resin, a capillary with an inner diameter of 1 mm and a length of 20 mm was used, at a shear rate of 1000 sec. -1 The melt viscosity of the liquid crystal resin composition was determined according to ISO 11443. It should be noted that the specific test temperature was 350°C for the liquid crystal resin composition containing the above-mentioned aromatic polyester amide resin and 340°C for the liquid crystal resin composition containing the above-mentioned aromatic polyester resin. Melt viscosity was used as an indicator of the flowability of the liquid crystal resin composition. That is, a melt viscosity of 60 Pa·s or less was evaluated as good flowability, and a melt viscosity exceeding 60 Pa·s was evaluated as poor flowability. The results are shown in Tables 1 and 2.

[0160] <Number of dust produced>

[0161] Using a molding machine (Sumitomo Heavy Industries, Ltd. "SE30DUZ"), the granules of the examples and comparative examples were shaped under the following molding conditions to obtain molded bodies of 12.5 mm × 120 mm × 0.8 mm. These molded bodies were used as test pieces.

[0162] [Forming conditions]

[0163] Barrel temperature:

[0164] 350℃ (Examples 1-6 and Comparative Examples 1-6)

[0165] 340℃ (Example 7)

[0166] Mold temperature: 80℃

[0167] Injection speed: 100 mm / s

[0168] [evaluate]

[0169] The test pieces were placed in 80 ml of water at room temperature and ultrasonically cleaned for 3 minutes using a 300 W, 45 kHz ultrasonic cleaner. Then, using a particle counter (RION CO., LTD. KL-11A liquid particle counter), the number of particles larger than 2 μm in the water was measured, and the dust generation count per 10 ml was calculated. The dust generation count was used as an indicator of the low dust generation performance of the molded product. Specifically, a dust generation count of less than 50,000 particles / mL per 10 ml was considered good low dust generation performance, while a dust generation count of 50,000 particles / mL or more per 10 ml was considered poor low dust generation performance. The results are shown in Tables 1 and 2.

[0170] Low sliding wear

[0171] Using a forming machine (Sumitomo Heavy Industries, Ltd. "SE100DU"), the granules of the examples and comparative examples were formed under the following forming conditions to obtain test pins (10 mm in diameter, 10 mm in length) and test pieces (12.5 mm × 120 mm × 0.8 mm). Figure 2 As shown, a load was applied to the test pin on the test piece, and a reciprocating sliding test was performed under the following reciprocating sliding conditions. The surface of the test piece was then visually inspected, and the low sliding wear property of the molded body was evaluated according to the following criteria. The results are shown in Tables 1 and 2.

[0172] ○ (Good): No dust was generated on the surface of the test piece used for testing.

[0173] × (Difference): Dust was generated on the surface of the test piece used for measurement.

[0174] [Forming conditions]

[0175] Barrel temperature:

[0176] 350℃ (Examples 1-6 and Comparative Examples 1-6)

[0177] 340℃ (Example 7)

[0178] Mold temperature: 80℃

[0179] Injection speed: 33 mm / s

[0180] [Reciprocating sliding condition]

[0181] Sliding speed: 50mm / second

[0182] Stroke: 20mm

[0183] Load: 0.98N (0.1kg weight)

[0184] Number of round trips: 1000

[0185] <Camera Module Molding Flatness>

[0186] Using a forming machine (Sumitomo Heavy Industries, Ltd. "SE30DUZ"), the pellets of the examples and comparative examples were formed under the following forming conditions to obtain the following results: Figure 3 A 10.0mm × 10.0mm × 1.0mm camera module molded article is shown in (a). The obtained camera module molded article is placed on a horizontal table, and the height of the camera module molded article is measured using a QUICK VISION 404PROCNC image measuring machine manufactured by Mitutoyo Corporation. At this time, in Figure 3 In (b), the height was measured at multiple locations indicated by black dots. The difference between the maximum and minimum heights from the least squares plane was used as the camera module molding flatness. Camera module molding flatness was used as an indicator of the low warpage of the molded body. That is, a camera module molding flatness of less than 0.07 mm was evaluated as good low warpage, and a camera module molding flatness exceeding 0.07 mm was evaluated as poor low warpage. The results are shown in Tables 1 and 2.

[0187] [Forming conditions]

[0188] Barrel temperature:

[0189] 350℃ (Examples 1-6 and Comparative Examples 1-6)

[0190] 340℃ (Example 7)

[0191] Mold temperature: 80℃

[0192] Injection speed: 100 mm / s

[0193] Holding pressure: 50MPa

[0194] <Evaluation of Inward Deformation>

[0195] Under the following molding conditions, the liquid crystal resin composition was injection molded to obtain... Figure 4 (a) and Figure 4 The KO-shaped liquid crystal resin molded body (thickness: 0.5 mm) shown in (b) was measured using a KEYENCE CORPORATION IM-6020 image size measuring instrument. Figure 2 Angles A (gate side) and B (reverse gate side) are shown in (4). The average of angles A and B is calculated and used as an indicator of the dimensional accuracy of the molded body. The dimensional accuracy of the molded body is evaluated according to the following criteria. The results are shown in Tables 1 and 2.

[0196] ○ (Good): The average of angles A and B is above 87.3°.

[0197] ×(difference): The average of angle A and angle B is less than 87.3°.

[0198] [Forming conditions]

[0199] Molding machine: Sumitomo Heavy Industries, Ltd., SE30DUZ

[0200] Barrel temperature: 350℃

[0201] Mold temperature: 90℃

[0202] Injection speed: 100 mm / s

[0203] <Bending Test>

[0204] Using a forming machine (Sumitomo Heavy Industries, Ltd., “SE100DU”), the granules of the examples and comparative examples were formed under the following forming conditions to obtain ISO test piece type A. This test piece was then cut to obtain a test piece for measurement (80 mm × 10 mm × 4 mm). Using this test piece, the flexural strength and flexural modulus were determined according to ISO 178. The results are shown in Tables 1 and 2.

[0205] [Forming conditions]

[0206] Barrel temperature:

[0207] 350℃ (Examples 1-6 and Comparative Examples 1-6)

[0208] 340℃ (Example 7)

[0209] Mold temperature: 90℃

[0210] Injection speed: 33 mm / s

[0211] [Table 1]

[0212]

[0213] [Table 2]

[0214]

[0215] The results recorded in Tables 1 and 2 confirm that the liquid crystal resin composition of the embodiments can provide molded articles with excellent balance in terms of low dust generation, low sliding wear, low warpage and suppression of inclination deformation, and good flowability.

[0216] Explanation of reference numerals in the attached figures

[0217] 1. Camera module

[0218] 10 substrate

[0219] 11. Imaging components

[0220] 12. Lead wire wiring

[0221] 13 Lens support

[0222] 14 Lens tubes

[0223] 15 Lenses

[0224] 16 IR Filters

[0225] 17. Guide

[0226] 18 bases

[0227] 19 coils

[0228] 20 permanent magnets

[0229] 21 Magnetic yoke

[0230] 22. Cover.

Claims

1. A liquid crystal resin composition comprising: (A) Liquid crystal resin, (B) Granular filler, (C) Plate-shaped filler, and (D) Olefin polymers The median particle size of the granular filler (B) is 0.3–8 μm. The median particle size of the plate-like filler (C) is 10–50 μm. The (D) olefin polymers include epoxy-containing olefin polymers. Relative to the liquid crystal resin composition as a whole, The content of the liquid crystal resin (A) is 52-82% by mass. The content of the granular filler (B) is 2.5% to 35% by mass. The content of the (C) plate-shaped filler is 5-35% by mass. The total content of the granular filler (B) and the plate-like filler (C) is 15-45% by mass. The content of the (D) olefin polymer is 1.50–6.00% by mass. The content of the epoxy groups is 0.003 to 0.050 by mass.

2. The liquid crystal resin composition according to claim 1, wherein, The liquid crystal resin (A) is an aromatic polyester or aromatic polyesteramide having structural units derived from at least one of the group consisting of aromatic hydroxycarboxylic acids and their derivatives as constituent components.

3. The liquid crystal resin composition according to claim 1 or 2, wherein, The granular filler (B) comprises one or more selected from the group consisting of silica and barium sulfate. The (C) plate-shaped filler comprises one or more selected from the group consisting of talc and mica.

4. The liquid crystal resin composition according to claim 1 or 2, used in a camera module component.

5. The use of the liquid crystal resin composition according to claim 1 or 2 in the manufacture of camera module components.

6. A molded article comprising the liquid crystal resin composition of claim 1 or 2.

7. A camera module component comprising the molded body of claim 6.

8. A camera module comprising the camera module component of claim 7.

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