Liquid crystal polymer composition

Abstract

An object of the present invention is to provide a liquid crystal polymer composition that is excellent in thin-wall fluidity and blister resistance while maintaining the mechanical strength and heat resistance of the liquid crystal polymer. **Solution**: The present invention relates to a liquid crystal polymer composition containing 0.1 to 150 parts by mass of talc having a quartz content of 0 to 0.25% by mass with respect to 100 parts by mass of the liquid crystal polymer.

Description

Technical Field

[0001] The present invention relates to a liquid crystal polymer composition having excellent thin-wall fluidity and blister resistance while maintaining the mechanical strength and heat resistance of the liquid crystal polymer.

Background Art

[0002] Liquid crystal polymers have excellent moldability and high heat resistance, and taking advantage of these properties, they are mainly used in applications such as connectors, relays, and bobbins for electronic components. In recent years, the high integration, miniaturization, thinning, and flattening of electronic components have been progressing. Among them, in connector components, the tendency toward miniaturization and thinning is remarkable.

[0003] Typical examples of such thin-walled connectors include board-to-board connectors used for joining printed wiring boards and FPC connectors used for connecting flexible printed circuits (FPCs) to printed wiring boards.

[0004] Board-to-board connectors and FPC connectors are required to have heat resistance to withstand reflow soldering, and with the miniaturization of electronic devices using printed wiring boards, the miniaturization of the components themselves is also required. For example, narrow pitch connectors with a pitch between the metal terminals of the connector of 0.3 mm to 0.4 mm are provided. In addition, thin connectors with a stacking height of 0.6 mm when the connector is inserted are also provided.

[0005] However, in order to meet the requirements for miniaturization and thinning, there is a risk of short shots and the like caused by insufficient fluidity of the resin during the molding of the connector. Therefore, further improvement in the fluidity of the resin (thin-wall fluidity) in the thin-walled portion of the molded product is required.

[0006] In addition, when the molded product is left in a high-temperature atmosphere for a long time or when soldering is performed, etc., swelling called blisters may occur on the surface. Although the cause of this phenomenon is not clear, air entrained during the molding of the liquid crystal polymer or oligomer components contained in the resin are brought into the molded product, and then when high-temperature heat treatment is performed, the air expands and the oligomer components gasify, etc., pushing up the surface of the molded product softened by heating and appearing as blisters.

[0007] As described above, the liquid crystal polymer, which is a forming material for thin connectors typified by board-to-board connectors and FPC connectors, is required to have excellent thin-wall fluidity and blister resistance while maintaining the properties of the liquid crystal polymer such as mechanical strength and heat resistance.

[0008] Patent Document 1 proposes a liquid crystalline polyester composition that can obtain a molded body in which gas generation is sufficiently reduced to the extent that blister abnormalities and the like can be suppressed while having high fluidity and anisotropy relaxation of the liquid crystalline polyester by containing a specific terphenyl and a liquid crystalline polyester. However, the fluidity of the resin composition was not sufficient and there was room for improvement.

[0009] Patent Document 2 proposes a liquid crystalline polyester resin composition that has excellent rigidity at high temperatures while maintaining high fluidity and can reduce the occurrence of blisters by containing a specific liquid crystalline polyester and a plate-like filler in a predetermined ratio. However, the blister resistance of the resin composition was not sufficient and there was room for improvement.

[0010] In order to improve the thin-wall fluidity, there is a method of lowering the viscosity of the resin, but doing so makes it easier to entrain air into the molded product during molding, and as a result, blisters are more likely to occur. Thus, although various studies have been conducted on liquid crystal polymer compositions, it was considered difficult to achieve both high thin-wall fluidity and blister resistance at a high level.

Prior Art Documents

Patent Document

[0011]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0012] The present invention has been made in view of the above circumstances, and an object thereof is to provide a liquid crystal polymer composition excellent in thin-wall fluidity and blister resistance while maintaining the mechanical strength and heat resistance of the liquid crystal polymer.

Means for Solving the Problems

[0013] As a result of intensive studies in view of the above problems, the present inventors have found that by blending a specific amount of a specific talc with a liquid crystal polymer, a liquid crystal polymer composition excellent in thin-wall fluidity and blister resistance can be obtained while maintaining the mechanical strength and heat resistance of the liquid crystal polymer, and have completed the present invention.

[0014] That is, the present invention includes the following preferred embodiments. 〔1〕A liquid crystal polymer composition containing 0.1 to 150 parts by mass of talc having a quartz content of 0 to 0.25% by mass with respect to 100 parts by mass of the liquid crystal polymer. 〔2〕The liquid crystal polymer composition according to 〔1〕, wherein the liquid crystal polymer contains a repeating unit represented by formula (I) and / or formula (II)

Chemical formula

Chemical formula

[11] is a component that constitutes one selected from the group consisting of a connector, a switch, a relay, a bobbin, a capacitor, a coil, a motor, a fan, a test socket, a transformer, a camera module, and an antenna.

Advantages of the Invention

[0015] The liquid crystal polymer composition of the present invention maintains the mechanical strength and heat resistance of the liquid crystal polymer, and is excellent in thin-wall fluidity and blister resistance. Therefore, it is suitably used for various applications of electrical and electronic components of various communication devices and electronic devices, such as connectors, switches, relays, bobbins, capacitors, coils, motors, fans, test sockets, transformers, camera modules, and antennas.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Embodiments for Carrying Out the Invention

[0017] The liquid crystal polymer (hereinafter also referred to as LCP) used in the liquid crystal polymer composition of the present invention is a polyester or polyester amide that forms an anisotropic melt phase, and is not particularly limited as long as it is called a thermotropic liquid crystal polyester or thermotropic liquid crystal polyester amide in the technical field.

[0018] The properties of the anisotropic melt phase of the liquid crystal polymer can be confirmed by a normal polarization inspection method using a cross polarizer, that is, by observing a sample placed on a hot stage in a nitrogen atmosphere.

[0019] As the liquid crystal polymer used in the present invention, those having a crystal melting temperature measured by a differential scanning calorimeter of 220 to 380 °C are preferred, those having a crystal melting temperature of 260 to 370 °C are more preferred, those having a crystal melting temperature of 290 to 360 °C are even more preferred, and those having a crystal melting temperature of 310 to 350 °C are particularly preferred.

[0020] If the crystal melting temperature of the liquid crystal polymer is below 220 °C, the heat resistance is poor, and if it exceeds 380 °C, the moldability tends to decrease, which is not preferable.

[0021] In addition, in this specification and the claims, the "crystal melting temperature" is determined from the crystal melting temperature peak temperature measured by a differential scanning calorimeter (hereinafter abbreviated as DSC) at a heating rate of 20 °C / min. More specifically, after observing the endothermic peak temperature (Tm1) observed when a sample of the liquid crystal polymer is measured under heating conditions of 20 °C / min from room temperature, the sample is held at a temperature 20 to 50 °C higher than Tm1 for 10 minutes, and then, after cooling the sample to room temperature under cooling conditions of 20 °C / min, the endothermic peak observed when measured again under heating conditions of 20 °C / min is observed, and the temperature indicating the peak top is defined as the crystal melting temperature (Tm) of the liquid crystal polymer. As the measuring instrument, for example, DSC7020 manufactured by Hitachi High-Tech Science Corporation can be used.

[0022] Examples of the polymerizable monomer constituting the structural unit of the liquid crystal polymer in the present invention include aromatic hydroxycarboxylic acid, aromatic dicarboxylic acid, aromatic diol, aromatic aminocarboxylic acid, aromatic hydroxyamine, aromatic diamine, aliphatic diol, and aliphatic dicarboxylic acid. Such polymerizable monomers may be used alone or in combination of two or more. Preferably, a polymerizable monomer having at least one hydroxy group and carboxyl group is used. Further, it is more preferable that the liquid crystal polymer in the present invention is a liquid crystal polymer composed only of aromatic monomers and does not contain aliphatic monomers.

[0023] Specific examples of the aromatic hydroxycarboxylic acid include 4-hydroxybenzoic acid, 3-hydroxybenzoic acid, 2-hydroxybenzoic acid, 6-hydroxy-2-naphthoic acid, 5-hydroxy-2-naphthoic acid, 7-hydroxy-2-naphthoic acid, 3-hydroxy-2-naphthoic acid, 4'-hydroxyphenyl-4-benzoic acid, 3'-hydroxyphenyl-4-benzoic acid, 4'-hydroxyphenyl-3-benzoic acid, and their alkyl, alkoxy or halogen substituents, and ester-forming derivatives such as their acylates, ester derivatives, acid halides, etc. Among these, from the viewpoint of easily adjusting the heat resistance, mechanical strength and melting point of the obtained liquid crystal polymer, 4-hydroxybenzoic acid and / or 6-hydroxy-2-naphthoic acid are preferred.

[0024] Specific examples of the aromatic dicarboxylic acid include terephthalic acid, isophthalic acid, 2,6-naphthalenedicarboxylic acid, 1,6-naphthalenedicarboxylic acid, 2,7-naphthalenedicarboxylic acid, 4,4'-dicarboxybiphenyl, 3,4'-dicarboxybiphenyl and 4,4''-dicarboxytriphenyl, their alkyl, alkoxy or halogen substituents, and ester-forming derivatives such as their ester derivatives, acid halides, etc. Among these, from the viewpoint of effectively enhancing the heat resistance of the obtained liquid crystal polymer, one or more compounds selected from the group consisting of terephthalic acid, isophthalic acid and 2,6-naphthalenedicarboxylic acid are preferred, and terephthalic acid and / or 2,6-naphthalenedicarboxylic acid are more preferred.

[0025] Specific examples of the aromatic diol include hydroquinone, resorcinol, 2,6-dihydroxynaphthalene, 2,7-dihydroxynaphthalene, 1,6-dihydroxynaphthalene, 3,3'-dihydroxybiphenyl, 3,4'-dihydroxybiphenyl, 4,4'-dihydroxybiphenyl, 4,4'-dihydroxybiphenyl ether, 2,2'-dihydroxybinaphthyl, their alkyl, alkoxy or halogen substituents, and ester-forming derivatives such as their acylates. Among these, from the viewpoint of excellent reactivity during polymerization, one or more compounds selected from the group consisting of hydroquinone, resorcinol, 4,4'-dihydroxybiphenyl and 2,6-dihydroxynaphthalene are preferred, and hydroquinone and / or 4,4'-dihydroxybiphenyl are more preferred.

[0026] Specific examples of the aromatic aminocarboxylic acid include 4-aminobenzoic acid, 3-aminobenzoic acid, 6-amino-2-naphthoic acid, their alkyl, alkoxy or halogen substituents, and ester-forming derivatives such as their acylates, ester derivatives, acid halides.

[0027] Specific examples of the aromatic hydroxyamine include 4-aminophenol, N-methyl-4-aminophenol, 3-aminophenol, 3-methyl-4-aminophenol, 4-amino-1-naphthol, 4-amino-4'-hydroxybiphenyl, 4-amino-4'-hydroxybiphenyl ether, 4-amino-4'-hydroxybiphenylmethane, 4-amino-4'-hydroxybiphenyl sulfide and 2,2'-diaminobinaphthyl, their alkyl, alkoxy or halogen substituents, and ester-forming derivatives such as their acylates. Among these, 4-aminophenol is preferred from the viewpoint of easily achieving a balance between the heat resistance and mechanical strength of the resulting liquid crystal polymer.

[0028] Specific examples of the aromatic diamine include 1,4-phenylenediamine, 1,3-phenylenediamine, 1,5-diaminonaphthalene, 1,8-diaminonaphthalene, alkyl, alkoxy or halogen substituents thereof, and amide-forming derivatives such as their acylates.

[0029] Specific examples of the aliphatic diol include ethylene glycol, 1,4-butanediol, 1,6-hexanediol, and their acylates. Further, a polymer containing an aliphatic diol such as polyethylene terephthalate or polybutylene terephthalate may be reacted with the above aromatic oxycarboxylic acid, aromatic dicarboxylic acid, aromatic diol and their acylates, ester derivatives, acid halides, etc.

[0030] Specific examples of the aliphatic dicarboxylic acid include oxalic acid, malonic acid, succinic acid, glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid, sebacic acid, dodecanedioic acid, tetradecanedioic acid, fumaric acid, maleic acid and hexahydroterephthalic acid. Among these, oxalic acid, succinic acid, adipic acid, suberic acid, sebacic acid and dodecanedioic acid are preferable from the viewpoint of excellent reactivity during polymerization.

[0031] The polymerizable monomer that forms the constitutional unit of the liquid crystal polymer in the present invention may contain, as other copolymerization components, dihydroxyterephthalic acid, 4-hydroxyisophthalic acid, 5-hydroxyisophthalic acid, trimellitic acid, 1,3,5-benzenetricarboxylic acid, pyromellitic acid or their alkyl, alkoxy or halogen substituents, and their acylates, ester derivatives, acid halides and other ester-forming derivatives, as long as the object of the present invention is not impaired. The amount of these polymerizable monomers used is preferably such that it is 10 mol% or less based on all the constitutional units constituting the liquid crystal polymer.

[0032] In the present invention, the liquid crystal polymer may contain a thioester bond as long as the object of the present invention is not impaired. Examples of the polymerizable monomer that provides such a bond include mercapto aromatic carboxylic acid, aromatic dithiol, and hydroxy aromatic thiol. The content of these polymerizable monomers is preferably an amount such that it is 10 mol% or less with respect to all the constituent units constituting the liquid crystal polymer.

[0033] Among the polymers obtained by combining these repeating units, there are those that form a nematic molten phase and those that do not form a nematic molten phase depending on the constitution and composition ratio of the monomers and the sequence distribution of each repeating unit in the polymer. However, the liquid crystal polymer used in the present invention is limited to those that form a nematic molten phase.

[0034] Specific examples of the combination of polymerizable monomers that form the constituent units of the liquid crystal polymer used in the present invention include, for example, the following. 1) 4-Hydroxybenzoic acid / 6-hydroxy-2-naphthoic acid, 2) 4-Hydroxybenzoic acid / terephthalic acid / 4,4'-dihydroxybiphenyl, 3) 4-Hydroxybenzoic acid / terephthalic acid / isophthalic acid / 4,4'-dihydroxybiphenyl, 4) 4-Hydroxybenzoic acid / terephthalic acid / isophthalic acid / 4,4'-dihydroxybiphenyl / hydroquinone, 5) 4-Hydroxybenzoic acid / terephthalic acid / hydroquinone, 6) 6-Hydroxy-2-naphthoic acid / terephthalic acid / hydroquinone, 7) 4-Hydroxybenzoic acid / 6-hydroxy-2-naphthoic acid / terephthalic acid / 4,4'-dihydroxybiphenyl, 8) 6-Hydroxy-2-naphthoic acid / terephthalic acid / 4,4'-dihydroxybiphenyl, 9) 4-Hydroxybenzoic acid / 6-hydroxy-2-naphthoic acid / terephthalic acid / hydroquinone, 10) 4-Hydroxybenzoic acid / 6-hydroxy-2-naphthoic acid / terephthalic acid / hydroquinone / 4,4'-dihydroxybiphenyl, 11) 4-Hydroxybenzoic acid / 2,6-naphthalenedicarboxylic acid / 4,4'-dihydroxybiphenyl, 12) 4-Hydroxybenzoic acid / terephthalic acid / 2,6-naphthalenedicarboxylic acid / hydroquinone, 13) 4-Hydroxybenzoic acid / 2,6-naphthalenedicarboxylic acid / hydroquinone, 14) 4-Hydroxybenzoic acid / 6-hydroxy-2-naphthoic acid / 2,6-naphthalenedicarboxylic acid / hydroquinone, 15) 4-Hydroxybenzoic acid / terephthalic acid / 2,6-naphthalenedicarboxylic acid / hydroquinone / 4,4'-dihydroxybiphenyl, 16) 4-Hydroxybenzoic acid / terephthalic acid / 4-aminophenol, 17) 6-Hydroxy-2-naphthoic acid / terephthalic acid / 4-aminophenol, 18) 4-Hydroxybenzoic acid / 6-hydroxy-2-naphthoic acid / terephthalic acid / 4-aminophenol, 19) 4-Hydroxybenzoic acid / terephthalic acid / 4,4'-dihydroxybiphenyl / 4-aminophenol, 20) 4-Hydroxybenzoic acid / terephthalic acid / ethylene glycol, 21) 4-Hydroxybenzoic acid / terephthalic acid / 4,4'-dihydroxybiphenyl / ethylene glycol, 22) 4-Hydroxybenzoic acid / 6-hydroxy-2-naphthoic acid / terephthalic acid / ethylene glycol, 23) 4-Hydroxybenzoic acid / 6-hydroxy-2-naphthoic acid / terephthalic acid / 4,4'-dihydroxybiphenyl / ethylene glycol, 24) 4-Hydroxybenzoic acid / terephthalic acid / 2,6-naphthalenedicarboxylic acid / 4,4'-dihydroxybiphenyl.

[0035] Among these, a liquid crystal polymer composed of constitutional units derived from the polymerizable monomers of 1), 2), 3), 7), 9), 10), and 14) is preferred, a liquid crystal polymer composed of constitutional units derived from the polymerizable monomers of 9), 10), and 14) is more preferred, and a liquid crystal polymer composed of constitutional units derived from the polymerizable monomer of 10) is even more preferred.

[0036] In one preferred embodiment, the liquid crystal polymer used in the liquid crystal polymer composition of the present invention is, in terms of excellent fluidity and mechanical properties, represented by formula (I) and / or formula (II)

Chemical formula

[0037] In the liquid crystal polymer containing repeating units represented by formula (I) and / or formula (II), in terms of excellent fluidity and heat resistance, furthermore, Formula (III) and Formula it preferably contains repeating units represented by (IV).

Chemical formula

[0038] Here, the repeating unit represented by formula (III) may be a plurality of repeating units each containing a different Ar1, and the repeating unit represented by formula (IV) may be a plurality of repeating units each containing a different Ar2. That is, the repeating unit represented by formula (III) may be a plurality of repeating units such as a repeating unit having a certain type of Ar1 and a repeating unit having another type of Ar1, and similarly, the repeating unit represented by formula (IV) may be a plurality of repeating units such as a repeating unit having a certain type of Ar2 and a repeating unit having another type of Ar2. Also, the "aromatic group" refers to an aromatic group that is a 6-membered monocyclic ring (including a biphenyl structure) or a condensed ring having 2 rings.

[0039] In terms of excellent fluidity and mechanical properties, the composition ratio (mol%) of the repeating units represented by formula (I) and / or formula (II) is preferably 30 to 80 mol%, more preferably 40 to 70 mol%. For each of the repeating units represented by formula (III) and formula (IV), 10 to 35 mol% is preferably, and 15 to 30 mol% is more preferably. The repeating units represented by formula (III) and formula (IV) are preferably in substantially equimolar amounts.

[0040] As another preferred embodiment, further Formula (III) and Formula In the liquid crystal polymer containing the repeating units represented by (IV), in terms of excellent fluidity and mechanical properties, it is preferable to contain both of the repeating units represented by formula (I) and formula (II).

Chemical formula

[0041] In terms of excellent fluidity and mechanical properties, the total composition ratio (mol%) of the repeating units represented by formula (I) and formula (II) is preferably 30 to 80 mol%, more preferably 35 to 60 mol%. For the repeating unit represented by formula (II), 0.1 to 30 mol% is preferably, 0.5 to 25 mol% is more preferably, and 1 to 20 mol% is even more preferably. For each of the repeating units represented by formula (III) and formula (IV), 10 to 35 mol% is preferably, and 20 to 32.5 mol% is more preferably. The repeating units represented by formula (III) and formula (IV) are preferably in substantially equimolar amounts.

[0042] In terms of excellent fluidity and heat resistance, the repeating units represented by formulas (III) to (IV) are more preferably each one or more repeating units in which Ar1 and Ar2 are each independently selected from aromatic groups represented by the following formulas (1) to (4). The repeating unit represented by formula (III) is a repeating unit in which Ar1 is an aromatic group represented by formula (1) and / or formula (3), and the repeating unit represented by formula (IV) is particularly preferably a repeating unit in which Ar2 is an aromatic group represented by one or more selected from the group consisting of formula (1), (2), and (4).

Chemical formula

[0043] Hereinafter, the method for producing the liquid crystal polymer used in the present invention will be described.

[0044] The method for producing the liquid crystal polymer used in the present invention is not particularly limited, and a liquid crystal polymer can be obtained by subjecting a polymerizable monomer to a known polycondensation method for forming an ester bond or an amide bond, such as a melt acidolysis method, a slurry polymerization method, or the like.

[0045] The melt acidolysis method is a preferable method for producing the liquid crystal polymer used in the liquid crystal polymer composition of the present invention. This method first heats the polymerizable monomer to form a molten solution of the reaction substance, and then continues the polycondensation reaction to obtain a molten polymer. In addition, a vacuum may be applied to facilitate the removal of volatile substances (such as acetic acid, water, etc.) by-produced in the final stage of condensation.

[0046] The slurry polymerization method is a method of reacting a polymerizable monomer in the presence of a heat exchange fluid, and the solid product is obtained in a state of being suspended in the heat exchange medium.

[0047] In both the melt acidolysis method and the slurry polymerization method, the polymerizable monomer used in producing the liquid crystal polymer can also be subjected to the reaction in a modified form in which the hydroxyl group and / or amino group is acylated at normal temperature, that is, as a lower acyl compound.

[0048] The lower acyl group preferably has 2 to 5 carbon atoms, more preferably 2 or 3 carbon atoms. In a preferred embodiment of the present invention, the acetylated product of the polymerizable monomer is subjected to the reaction.

[0049] As the lower acyl compound of the polymerizable monomer, those separately acylated and pre-synthesized may be used, or an acylating agent such as acetic anhydride may be added to the polymerizable monomer during the production of the liquid crystal polymer to generate it in the reaction system.

[0050] In both the melt acidolysis method and the slurry polymerization method, the polycondensation reaction is preferably carried out at a temperature of 150 to 400 °C, more preferably 250 to 370 °C, under normal pressure and / or reduced pressure, and a catalyst may be used as necessary.

[0051] Specific examples of the catalyst include organotin compounds such as dialkyltin oxide (for example, dibutyltin oxide) and diaryltin oxide; titanium dioxide; antimony trioxide; organic titanium compounds such as alkoxytitanium silicate and titanium alkoxide; alkali and alkaline earth metal salts of carboxylic acids (for example, sodium acetate and potassium acetate); gaseous acid catalysts such as Lewis acids (for example, boron trifluoride) and hydrogen halides (for example, hydrogen chloride).

[0052] When using a catalyst, the amount of the catalyst is preferably 1 to 1000 ppm, more preferably 2 to 100 ppm, based on the total amount of the polymerizable monomer.

[0053] The liquid crystal polymer obtained by such a polycondensation reaction is usually withdrawn from the polymerization reaction tank in a molten state and then processed into pellets, flakes, or powder, and is subjected to melt kneading with other components.

[0054] The pellet-shaped, flake-shaped, or powdery liquid crystal polymer may be heat-treated in a substantially solid state under reduced pressure, under vacuum, or in an atmosphere of an inert gas such as nitrogen or helium for the purpose of increasing the molecular weight and improving the heat resistance.

[0055] The temperature of the heat treatment is not particularly limited as long as the liquid crystal polymer does not melt, but is preferably 260 to 350 ° C, more preferably 280 to 320 ° C.

[0056] The melt viscosity of the liquid crystal polymer used in the present invention (measured with a capillary rheometer, crystal melting temperature +10 to 30 ° C, 1000 s -1 ) is preferably 1 to 200 Pa·s, more preferably 3 to 100 Pa·s, even more preferably 4 to 80 Pa·s, and particularly preferably 5 to 40 Pa·s.

[0057] When the melt viscosity is less than 1 Pa·s, drooling and stringing phenomena tend to occur during injection molding, and when it exceeds 200 Pa·s, the fluidity tends to decrease.

[0058] The average particle diameter of the talc used in the liquid crystal polymer composition of the present invention is preferably 0.1 to 100 μm, more preferably 0.5 to 80 μm, and even more preferably 3 to 50 μm. In this specification, the average particle diameter refers to the volume-based median diameter (median diameter) measured by the laser diffraction / scattering particle size distribution measurement method.

[0059] The talc used in the present invention preferably has a quartz content of 0 to 0.25% by mass, more preferably 0.20% by mass or less, still more preferably 0.15% by mass or less, particularly preferably 0.10% by mass or less, and most preferably 0.05% by mass or less, as measured by a powder X-ray diffractometer described below. The closer the quartz content is to 0% by mass, the better the blister resistance and fluidity. When it exceeds 0.25% by mass, the blister resistance or fluidity tends to decrease. In the present invention, quartz refers to silicon dioxide having a crystal structure (crystalline silica), which is also referred to as quartz. The method described below for evaluating the quartz content in talc using a powder X-ray diffractometer can also be applied to substances other than talc.

[0060] The above talc may be treated with a known surface treatment agent before use.

[0061] In the liquid crystal polymer composition of the present invention, the content of talc is 0.1 to 150 parts by mass, preferably 1 to 100 parts by mass, more preferably 5 to 80 parts by mass, and still more preferably 10 to 50 parts by mass, based on 100 parts by mass of the liquid crystal polymer. Talc When the content is less than 0.1 part by mass, the blister resistance tends to be insufficient. When it exceeds 150 parts by mass, the fluidity tends to decrease.

[0062] In addition, the liquid crystal polymer composition of the present invention may contain, within a range not impairing the object of the present invention, other fibrous, plate-like, granular, inorganic fillers or organic fillers in addition to the above-mentioned talc.

[0063] Examples of other fibrous fillers used in the present invention include silica alumina fiber, alumina fiber, carbon fiber, aramid fiber, polyarylate fiber, polybenzimidazole fiber, potassium titanate whisker, aluminum borate whisker, acicular titanium oxide, calcium silicate such as wollastonite, zonnolite, calcium titanate, aluminum borate, acicular calcium carbonate, basalt fiber, tetra-pot type zinc oxide, etc. These can be used alone or in combination of two or more.

[0064] Examples of other plate-shaped fillers used in the present invention include silicates such as mica, kaolin, clay, vermiculite, calcium silicate, aluminum silicate, feldspar powder, acid clay, waxstone clay, sericite, sillimanite, bentonite, glass flakes, slate powder, and silane; carbonates such as calcium carbonate, chalk, barium carbonate, magnesium carbonate, and dolomite; sulfates such as barite powder, precipitated calcium sulfate, gypsum, and barium sulfate; hydroxides such as hydrated alumina; oxides such as alumina, antimony oxide, magnesia, titanium oxide, zinc white, silica, silica sand, white carbon, and diatomaceous earth; sulfides such as molybdenum disulfide; and plate-shaped wollastonite. These can be used alone or in combination of two or more kinds.

[0065] Examples of other granular fillers used in the present invention include silica, alumina, titanium oxide, calcium carbonate, glass beads, glass balloons, barium sulfate, boron nitride, silicon carbide, and resin beads. These can be used alone or in combination of two or more kinds.

[0066] The content of these other fibrous, plate-shaped, or granular inorganic fillers or organic fillers is preferably 50 parts by mass or less, more preferably 30 parts by mass or less, based on 100 parts by mass of the liquid crystal polymer. When the content of these other fibrous, plate-shaped, or granular inorganic fillers or organic fillers exceeds 50 parts by mass, the fluidity tends to decrease.

[0067] In addition, the liquid crystal polymer composition of the present invention can contain other additives as long as the effects of the present invention are not impaired.

[0068] Other additives used in the present invention include, for example, lubricants such as higher fatty acids, higher fatty acid esters, higher fatty acid amides, higher fatty acid metal salts (where the higher fatty acid refers to, for example, those having 10 to 25 carbon atoms), mold release improvers such as polysiloxanes and fluororesins, colorants such as dyes, pigments, carbon black, flame retardants, antistatic agents, surfactants, phosphorus-based antioxidants, phenolic antioxidants, sulfur-based antioxidants, weathering agents, heat stabilizers, neutralizing agents, and the like. These additives may be used alone or in combination of two or more kinds.

[0069] The content of these other additives is preferably 10 parts by mass or less, more preferably 0.01 to 5 parts by mass, based on 100 parts by mass of the liquid crystal polymer. When the content of these other additives exceeds 10 parts by mass, the thermal stability tends to deteriorate.

[0070] For those having an external lubricant effect such as higher fatty acids, higher fatty acid esters, higher fatty acid metal salts, fluorocarbon-based surfactants, etc., when molding the liquid crystal polymer composition, they may be adhered to the surface of the pellets of the liquid crystal polymer composition in advance.

[0071] Further, the liquid crystal polymer composition of the present invention may further contain other resin components within a range not impairing the object of the present invention. Examples of other resin components include, for example, thermoplastic resins such as polyamides, polyesters, polyacetals, polyphenylene ethers and their modified products, polysulfones, polyethersulfones, polyetherimides, polyamideimides, elastomers, etc., and thermosetting resins such as phenolic resins, epoxy resins, polyimide resins, etc.

[0072] Other resin components can be contained alone or in combination of two or more kinds. The content of other resin components is not particularly limited and may be appropriately determined according to the use and purpose of the liquid crystal polymer composition. Typically, the total content of other resins with respect to 100 parts by mass of the liquid crystal polymer is preferably added in the range of 100 parts by mass or less, particularly 50 parts by mass or less.

[0073] A liquid crystal polymer, talc, and, if desired, other inorganic fillers and / or organic fillers, other additives, and other resin components are blended in a predetermined composition and melt-kneaded using a Banbury mixer, kneader, single-screw or twin-screw extruder, etc., to obtain a liquid crystal polymer composition.

[0074] The liquid crystal polymer composition of the present invention thus obtained is molded or processed by a known molding method using an injection molding machine, extruder, etc.

[0075] The liquid crystal polymer composition of the present invention preferably has a tensile strength of 80 MPa or more, more preferably 90 MPa or more, and even more preferably 100 MPa or more in a tensile test conducted in accordance with ASTM D638 using an ASTM No. 4 dumbbell test piece with a thickness of 3.2 mm. When the tensile strength is less than 80 MPa, it tends to be easily damaged when used as a small and thin-walled part. The upper limit value of the above tensile strength is not particularly limited, but is, for example, 250 MPa.

[0076] The liquid crystal polymer composition of the present invention preferably has an elongation at break of 1% or more, more preferably 2% or more, and even more preferably 3% or more in a tensile test conducted in accordance with ASTM D638 using an ASTM No. 4 dumbbell test piece with a thickness of 3.2 mm. When the elongation at break is less than 1%, it tends to be easily damaged when used as a small and thin-walled part. The upper limit value of the above elongation at break is not particularly limited, but is, for example, 10%.

[0077] In the Izod impact test in accordance with ASTM D256 using a strip-shaped test piece with a notched length of 63.5 mm, width of 12.7 mm, and thickness of 3.2 mm, the Izod impact strength of the liquid crystal polymer composition of the present invention is preferably 50 J / m or more, more preferably 100 J / m or more, still more preferably 150 J / m or more, and particularly preferably 200 J / m or more. When the Izod impact strength is less than 50 J / m, it tends to be easily damaged when used as a small and thin part. The upper limit value of the Izod impact strength is not particularly limited, but is, for example, 600 J / m.

[0078] The liquid crystal polymer composition of the present invention preferably has a heat deflection temperature (DTUL, load 1.82 MPa) in accordance with ASTM D648 of 200°C or higher, more preferably 210°C or higher, still more preferably 220°C or higher, and particularly preferably 230°C or higher, using a strip-shaped test piece (length 127 mm, width 12.7 mm) with a thickness of 3.2 mm. When the heat deflection temperature is less than 200°C, deformation is likely to occur in the reflow process, which is a processing step for electronic components, and the heat resistance tends to be poor. The upper limit value of the heat deflection temperature is not particularly limited, but is, for example, 320°C.

[0079] The liquid crystal polymer composition of the present invention has a melt viscosity measured at a temperature of the crystal melting temperature + 10 to 30°C by a melt viscosity measuring device having a capillary of 1.0 mmφ × 10 mm, preferably 3 to 70 Pa·s, more preferably 5 to 50 Pa·s, and still more preferably 10 to 40 Pa·s. When the melt viscosity is less than 3 Pa·s, problems such as drooling are likely to occur during injection molding, and when it exceeds 70 Pa·s, the fluidity tends to be insufficient.

[0080] The liquid crystal polymer composition of the present invention preferably has a flow length at a thickness of 0.1 mm, measured by the method described below, of 9 mm or more, more preferably 10 mm or more, still more preferably 11 mm or more, and particularly preferably 12 mm or more. When the flow length at a thickness of 0.1 mm is less than 7 mm, defects such as short shots tend to occur easily when forming small and thin parts. The upper limit value of the flow length at a thickness of 0.1 mm is not particularly limited, but is, for example, 50 mm.

[0081] The liquid crystal polymer composition of the present invention preferably has a blister generation rate in the step blister test measured by the method described below of 15% or less, more preferably 10% or less, still more preferably 5% or less. The lower the generation rate and the closer it is to 0%, the better the blister resistance. Since this test is a severe test, if the blister generation rate in this test is 15% or less, it has sufficient practicality. When the blister generation rate exceeds 15%, blisters may occur even in actual use depending on the molding conditions.

[0082] The liquid crystal polymer composition of the present invention preferably has a quartz content of 0 to 0.040% by mass, more preferably 0.030% by mass or less, still more preferably 0.020% by mass or less, and particularly preferably 0.010% by mass or less, based on the total amount of the liquid crystal polymer composition. When the quartz content exceeds 0.040% by mass, the blister resistance or fluidity tends to be inferior. The quartz content in the liquid crystal polymer composition can be calculated according to the content ratio by previously measuring the quartz content of each substance such as inorganic fillers such as talc contained in the liquid crystal polymer composition. As another method, 1.0 g of the liquid crystal polymer composition is taken in a crucible, treated at 500 to 600 °C for 5 hours in an electric furnace to be ashed, the mass of the obtained residue is measured, and the amount of quartz contained in the residue is calculated and evaluated by measuring the residue by the method described below using a powder X-ray diffractometer.

[0083] The liquid crystal polymer composition of the present invention can be used as a molded article because it has excellent thin-wall fluidity and blister resistance while maintaining the mechanical strength and heat resistance of the liquid crystal polymer. In particular, it is suitably used for electronic components such as connectors, switches, relays, bobbins, capacitors, coils, motors, fans, test sockets, transformers, camera modules, and antennas.

Examples

[0084] Hereinafter, the present invention will be described by way of examples, but the present invention is not limited to the following examples at all.

[0085] The measurement and evaluation of the crystal melting temperature, tensile strength, tensile elongation at break, Izod impact strength, heat distortion temperature, melt viscosity, flow length at 0.1 mm thickness, step blister, and quartz content contained in talc in the examples were carried out by the methods described below.

[0086] (1) Crystal melting temperature Using a differential scanning calorimeter (DSC7020 manufactured by Hitachi High-Tech Science Corporation), after observing the endothermic peak temperature (Tm1) measured under the temperature rising condition of 20 °C / min from room temperature, it was held at a temperature 20 to 50 °C higher than Tm1 for 10 minutes. Then, the sample was cooled to room temperature under the temperature decreasing condition of 20 °C / min, and the temperature at the peak top of the exothermic peak observed at that time was defined as the crystallization temperature (Tc) of the liquid crystal polymer. Furthermore, when measuring again under the temperature rising condition of 20 °C / min, the endothermic peak was observed, and the temperature indicating the peak top was defined as the crystal melting temperature (Tm) of the liquid crystal polymer.

[0087] (2) Tensile strength Using an injection molding machine (UH1000-110 manufactured by Nissei Plastic Industrial Co., Ltd.), injection molding was performed at a cylinder temperature of the crystal melting temperature + 10 to 30 °C and a mold temperature of 70 °C to obtain a dumbbell-shaped tensile test piece (ASTM No. 4, thickness 3.2 mm). The tensile test was measured using an autograph AG-X plus manufactured by Shimadzu Corporation, in accordance with ASTM D638, with a span distance of 64.0 mm and a tensile speed of 5 mm / min.

[0088] (3) Tensile fracture elongation Using the same test specimens as those used for the measurement of tensile strength, the measurement was carried out under the same conditions as those for tensile strength.

[0089] (4) Izod impact strength Using an injection molding machine (UH1000 - 110 manufactured by Nissei Plastic Industrial Co., Ltd.), strip-shaped test specimens with a length of 127 mm, a width of 12.7 mm, and a thickness of 3.2 mm were molded at a cylinder temperature of 350 °C and a mold temperature of 70 °C. The center of this test specimen was cut perpendicular to the length direction to obtain strip-shaped test specimens with a length of 63.5 mm, a width of 12.7 mm, and a thickness of 3.2 mm. After notching, the measurement was carried out in accordance with ASTM D256.

[0090] (5) Heat deflection temperature under load (DTUL) Using an injection molding machine (UH1000 - 110 manufactured by Nissei Plastic Industrial Co., Ltd.), strip-shaped test specimens with a length of 127 mm, a width of 12.7 mm, and a thickness of 3.2 mm were molded at a cylinder temperature of the melting temperature of the crystal + 10 to 30 °C and a mold temperature of 70 °C. Using this, in accordance with ASTM D648, the measurement was carried out at a load of 1.82 MPa and a heating rate of 2 °C / min.

[0091] (6) Melt viscosity Using a melt viscosity measuring device (Capillograph 1D manufactured by Toyo Seiki Seisaku-sho, Ltd.), with a capillary of 1.0 mmφ×10 mm, the melt viscosity was measured under the conditions of a shear rate of 1000 sec -1 , at 350 °C.

[0092] (7) Flow length at 0.1 mm thickness Using a rectangular bar flow mold with a length of 50 mm, a width of 2.0 mm, and a thickness of 0.1 mm, injection molding was carried out using an injection molding machine (NEX - 15 - 1E manufactured by Nissei Plastic Industrial Co., Ltd.) under the molding conditions shown in Table 1, and the flow length when filling the bar flow mold was measured.

[0093]

Table 1

[0094] (8) Step blister Using an injection molding machine (NEX-15-1E manufactured by Nissei Plastic Industrial Co., Ltd.), injection molding was carried out under the molding conditions shown in Table 2 to produce plate-shaped test pieces. This plate-shaped test piece has a plate-shaped portion with a length of 24 mm, a width of 16 mm, and a thickness of 0.3 mm. On one side plane portion, a total of six locations (arranged in three rows in the vertical direction and two rows in the horizontal direction), with a spacing of 4 mm each, are evenly provided with convex portions (length 4 mm, width 4 mm, height 0.5 mm, total thickness 0.8 mm). With this shape, during injection molding, it is intentionally shaped to easily entrap air in the resin, making it easy for blisters to occur due to heating and enabling a severe test. After leaving this plate-shaped test piece standing for 24 hours under the conditions of 23°C and a relative humidity of 50%, using an IR reflow device (SAI-2604 manufactured by Senju Metal Industry Co., Ltd.), reflow processing was carried out under the conditions of a preheating temperature of 190°C, a preheating time of 30 to 50 seconds, a main heating temperature of 250°C or higher, a main heating time of 20 to 30 seconds, and a peak temperature of 260 to 265°C. Then, the occurrence status of bulges (blisters) on the surface was counted visually. Regarding the counting method, a line was drawn using a writing instrument so as to divide the plate-shaped test piece into six parts centered on the six convex portions provided on the plate-shaped test piece, and the presence or absence of blisters was confirmed in each of the six regions. If there was an occurrence of blisters in each region, it was counted as 1, and if not, it was counted as 0. That is, for one plate-shaped test piece, the maximum count number of blisters is 6. For 15 test pieces (90 regions) under one injection speed condition, and a total of 60 test pieces (a total of 360 regions) under four injection speed conditions in total, when the occurrence rate of blisters was 0 to 5%, it was rated as ◎, when it was over 5% to 15%, it was rated as 〇, when it was over 15% to 25%, it was rated as △, and when it was over 25%, it was rated as ×.

[0095]

Table 2

[0096] (9) Evaluation of the quartz content contained in talc The quartz content contained in talc was determined as follows using a powder X-ray diffractometer (D8 ADVANCE manufactured by Bruker). Talc with a quartz content extremely close to zero (TP-40B manufactured by Tamura Talc Industry Co., Ltd. described below) and quartz (JAWE4513 manufactured by the Japan Society for Occupational Environment Measurement, a public interest incorporated association, with a SiO2 content of 99.6%) were mixed at a certain ratio (a total of 6 points with quartz ratios of 0.1 mass%, 0.3 mass%, 0.5 mass%, 1.0 mass%, 2.0 mass%, and 3.0 mass%). These were measured using a powder X-ray diffractometer, and a calibration curve was created using the peak intensity of quartz-derived peaks observed at around 2θ = 26.6 - 26.7°. Subsequently, talc alone used in the liquid crystal polymer composition was measured using a powder X-ray diffractometer, and the quartz content was calculated by comparing it with the calibration curve.

[0097] The measurement was carried out under the following conditions. X-ray generator: CuKα radiation source, voltage 40 kV, current 40 mA Slit: 0.3° Scan step: 0.02° Scan range: 25 - 28° Scan speed: 0.12 deg / min Rotation speed: 15 rpm X-ray detector: One-dimensional semiconductor detector Measurement atmosphere: Ambient atmosphere Sample stage: Sample stage for powder measurement (made of PMMA)

[0098] As the talc with a quartz content extremely close to zero, TP-40B manufactured by Tamura Talc Industry Co., Ltd., in which no quartz-derived peak was detected at around 2θ = 26.6 - 26.7° in the above measurement, was selected. Since no quartz-derived peak was detected, the quartz content of TP-40B was set to 0.00% in this example. In addition, if there were talcs with peak intensities lower than TP-40B due to the influence of small noises, etc., the quartz content of these talcs would also be set to 0.00%.

[0099] The X-ray diffraction charts of 100% talc with a quartz content extremely close to zero and a mixture of 97% talc and 3% quartz used to create the calibration curve are shown in Fig. 1. Also, the X-ray diffraction charts for determining the quartz content in each talc are shown in Fig. 2. In each of the following experimental examples, the quartz content in the liquid crystal polymer composition was calculated from the quartz content in the talc obtained by the above evaluation.

[0100] The following describes the synthesis examples of the liquid crystal polymers used in the examples and comparative examples. The abbreviations of the compounds in the synthesis examples are as follows.

[0101] [Monomers used in the synthesis of liquid crystal polymer (LCP)] POB: 4-Hydroxybenzoic acid BON6: 6-Hydroxy-2-naphthoic acid BP: 4,4'-Dihydroxybiphenyl HQ: Hydroquinone TPA: Terephthalic acid NDA: 2,6-Naphthalenedicarboxylic acid

[0102] Synthesis Example 1 (LCP1) In a reaction vessel equipped with a stirrer with a torque meter and a distillation tube, POB, BON6, HQ, BP, and TPA were charged in the composition ratios shown in Table 3 so that the total amount was 6.5 mol. Further, acetic anhydride in an amount 1.03 times the amount of hydroxyl groups (mol) of all the monomers was charged, and deacetic acid polymerization was carried out under the following conditions.

[0103] [Table 3]

[0104] Under a nitrogen gas atmosphere, the temperature was raised from room temperature to 150 °C over 1 hour and held at the same temperature for 30 minutes. Then, while distilling off the by-produced acetic acid, the temperature was raised to 350 °C over 7 hours, and then the pressure was reduced to 5 mmHg over 80 minutes. When a predetermined torque was shown, the polymerization reaction was terminated, and the content of the reaction vessel was taken out to obtain pellets of the liquid crystal polymer by a pulverizer. The amount of acetic acid distilled off during polymerization was almost the theoretical value. The crystal melting temperature (Tm) of the obtained pellets was 340 °C.

[0105] Synthesis Example 2 (LCP2) A reaction vessel equipped with a stirrer with a torque meter and a distillation tube was charged with POB, BON6, HQ, and TPA in the composition ratios shown in Table 4 so that the total amount was 6.5 mol. Further, 1.03 times the molar amount of acetic anhydride based on the amount of hydroxyl groups (mol) of all the monomers was charged, and deacetic acid polymerization was carried out under the following conditions.

[0106]

Table 4

[0107] Under a nitrogen gas atmosphere, the temperature was raised from room temperature to 150 °C over 1 hour and held at the same temperature for 30 minutes. Then, while distilling off the by-produced acetic acid, the temperature was raised to 350 °C over 7 hours, and then the pressure was reduced to 5 mmHg over 80 minutes. When a predetermined torque was shown, the polymerization reaction was terminated, the contents of the reaction vessel were taken out, and Liquid crystal polymer pellets were obtained by a pulverizer. The amount of distilled acetic acid during polymerization was almost the same as the theoretical value. The crystal melting temperature (Tm) of the obtained pellets was 332 °C.

[0108] Synthesis Example 3 (LCP3) A reaction vessel equipped with a stirrer with a torque meter and a distillation tube was charged with POB, BON6, HQ, and NDA in the composition ratios shown in Table 5 so that the total amount was 6.5 mol. Further, 1.03 times the molar amount of acetic anhydride based on the amount of hydroxyl groups (mol) of all the monomers was charged, and deacetic acid polymerization was carried out under the following conditions.

[0109]

Table 5

[0110] Under a nitrogen gas atmosphere, the temperature was raised from room temperature to 150 °C over 1 hour and held at the same temperature for 30 minutes. Then, while distilling off the by-produced acetic acid, the temperature was raised to 350 °C over 7 hours, and then the pressure was reduced to 5 mmHg over 80 minutes. When a predetermined torque was shown, the polymerization reaction was terminated, the contents of the reaction vessel were taken out, and Liquid crystal polymerPellets were obtained. The amount of acetic acid distilled off during polymerization was almost the same as the theoretical value. The crystal melting temperature (Tm) of the obtained pellets was 321 °C.

[0111] The talcs used in the following Examples and Comparative Examples are shown below. Talc 1: Manufactured by Nippon Talc Co., Ltd., talc "MS-SF" (average particle size: 16 μm, quartz content: 0.02%) Talc 2: Manufactured by Tamura Talc Kogyosho Co., Ltd., talc "TP-40B" (average particle size: 16 μm, quartz content: 0.00%) Talc 3: Manufactured by Fuji Talc Co., Ltd., talc "NK-64" (average particle size: 17 μm, quartz content: 0.28%) Talc 4: Manufactured by Fuji Talc Co., Ltd., talc "DS-34" (average particle size: 13 μm, quartz content: 0.80%)

[0112] Examples 1 to 6 and Comparative Examples 1 to 4 The synthesized LCP and the above talc were blended so as to have the contents (parts by mass) shown in Table 6, and melt kneading was carried out at a cylinder temperature of 350 °C using a twin-screw extruder (TEX-30 manufactured by Nippon Steel Corporation) to obtain pellets of the liquid crystal polymer composition. Thereafter, by the above method, the tensile strength, tensile elongation at break, Izod impact strength, heat distortion temperature, melt viscosity, 0.1 mm thickness flow length, and step blister were measured and evaluated. The results are shown in Table 6.

[0113] As shown in Table 6, all of the liquid crystal polymer compositions of Examples 1 to 6 maintained the mechanical strength and heat resistance of the liquid crystal polymer at a certain level, had a 0.1 mm thickness flow length of 10 mm or more, and were rated ◎ in the step blister evaluation, and were excellent in thin-wall fluidity and blister resistance.

[0114] On the other hand, the liquid crystal polymer compositions of Comparative Examples 1 to 4 were inferior in any of mechanical strength, heat resistance, thin-wall fluidity, and blister resistance, and did not sufficiently satisfy the balance of performance.

Table 6

Claims

1. A liquid crystal polymer composition comprising 5 to 100 parts by mass of talc having a quartz content of 0 to 0.15% by mass relative to 100 parts by mass of a liquid crystal polymer, The liquid crystal polymer is represented by the formula (I) and / or the formula (II): 【Chemistry 1】 and further comprising a repeating unit represented by formula (III) and formula (IV): 【Chemistry 2】 [In the formula, Ar 1 and Ar 2 each independently represent a divalent aromatic group.] A liquid crystal polymer composition comprising a repeating unit represented by the formula:

2. The repeating units represented by formulae (III) to (IV) are Ar １ and Ar ２ are each independently represented by the formulas (1) to (4). 【Chemistry 3】 2. The liquid crystal polymer composition according to claim 1, wherein each repeating unit is one or more types selected from aromatic groups represented by the following formula:

3. The liquid crystal polymer is represented by the formula (I) and the formula (II): 【Chemistry 4】 The liquid crystalline polymer composition according to claim 1 , comprising a repeating unit represented by:

4. The repeating units represented by formulae (III) to (IV) are Ar １ and Ar ２ are each independently represented by the formulas (1) to (4). 【Chemistry 5】 The liquid crystal polymer composition according to claim 3, wherein each repeating unit is one or more kinds of repeating units selected from aromatic groups represented by the following formula:

5. 2. The liquid crystal polymer composition according to claim 1, wherein the liquid crystal polymer has a crystalline melting temperature of 290 to 360° C. as measured by a differential scanning calorimeter.

6. 2. The liquid crystal polymer composition according to claim 1, wherein the average particle size of the talc is 0.1 to 100 μm.

7. 2. The liquid crystalline polymer composition according to claim 1, having an Izod impact strength of 200 J / m or more as measured in accordance with ASTM D256.

8. 2. The liquid crystal polymer composition according to claim 1, wherein the content of quartz in the liquid crystal polymer composition is 0 to 0.040% by mass.

9. A molded article made from the liquid crystal polymer composition according to any one of claims 1 to 8.

10. The molded article according to claim 9, which is a part constituting one selected from the group consisting of a connector, a switch, a relay, a bobbin, a capacitor, a coil, a motor, a fan, a test socket, a transformer, a camera module, and an antenna.

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