WO2022014663A1 - 樹脂組成物及びその成形品 - Google Patents
樹脂組成物及びその成形品 Download PDFInfo
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- WO2022014663A1 WO2022014663A1 PCT/JP2021/026568 JP2021026568W WO2022014663A1 WO 2022014663 A1 WO2022014663 A1 WO 2022014663A1 JP 2021026568 W JP2021026568 W JP 2021026568W WO 2022014663 A1 WO2022014663 A1 WO 2022014663A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/02—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds
- C08G63/60—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from the reaction of a mixture of hydroxy carboxylic acids, polycarboxylic acids and polyhydroxy compounds
- C08G63/605—Polyesters derived from hydroxycarboxylic acids or from polycarboxylic acids and polyhydroxy compounds derived from the reaction of a mixture of hydroxy carboxylic acids, polycarboxylic acids and polyhydroxy compounds the hydroxy and carboxylic groups being bound to aromatic rings
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
Definitions
- the present invention relates to a resin composition and a molded product thereof.
- Liquid crystal resin represented by all aromatic polyester resin has excellent mechanical strength, heat resistance, chemical resistance, electrical properties, etc. in a well-balanced manner, and also has excellent dimensional stability, so it is a high-performance engineering plastic. Widely used.
- remarkable technological developments have been made in the information and communication fields such as mobile phones; wireless LANs; GPS, VICS (registered trademark), and ITS technologies such as ETC.
- high-performance high-frequency compatible electronic components that can be applied in the high-frequency region such as microwaves and millimeter waves.
- the material constituting such an electronic component is required to have an appropriate dielectric property according to the design of each electronic component.
- Patent Document 1 proposes a liquid crystal resin composition having a low dielectric constant, which comprises a liquid crystal resin and a hollow filler having a predetermined aspect ratio.
- An object of the present invention is to provide a resin composition having excellent dielectric properties and a molded product thereof.
- liquid crystal resins such as all aromatic polyester resins have excellent dielectric properties, they are expected to be used in high-performance high-frequency compatible electronic components.
- an inorganic filler is often blended in order to improve various properties such as mechanical strength and low warpage, but when the inorganic filler is blended, the dielectric property becomes It tends to get worse.
- Patent Document 1 a hollow filler having a predetermined aspect ratio is blended to realize a low dielectric constant and suppress deterioration of dielectric properties. According to the research of the present inventor, it has been found that when mica is blended with a total aromatic polyester resin having a predetermined constituent unit, the dielectric loss tangent becomes low and deterioration of the dielectric property can be suppressed.
- the present invention has been completed based on the above findings and has the following aspects.
- the total aromatic polyester and mica are contained, and the total aromatic polyester has the following structural units (I), (II), (III) and (IV): as essential constituents.
- Ar 1 and Ar 2 each independently represent an arylene group
- the content of the constituent unit (I) is 40 to 75 mol% and the content of the constituent unit (II) is 0.5 to 7.5 mol with respect to all the constituent units of the total aromatic polyester.
- the content of the constituent unit (III) is 8.5 to 30 mol%
- the content of the constituent unit (IV) is 8.5 to 30 mol%.
- the content of the total aromatic polyester is 50 to 95% by mass with respect to the total amount of the resin composition.
- the resin composition according to any one of. [5] The resin composition according to any one of [1] to [4], which is used for manufacturing an antenna substrate or a connector for high-speed communication. [6] Use of the resin composition according to any one of [1] to [4] for manufacturing an antenna substrate or a high-speed communication connector. [7] A molded product containing the resin composition according to any one of [1] to [5]. [8] The molded product according to [7], which is an antenna board or a high-speed communication connector.
- the resin composition according to this embodiment contains a total aromatic polyester and mica.
- the whole aromatic polyester has the following constituent units (I), (II), (III) and (IV): as essential constituents.
- Ar 1 and Ar 2 each independently represent an arylene group.
- the content of the constituent unit (I) is 40 to 75 mol% with respect to all the constituent units, and the content of the constituent unit (II) is 0.5 to 7.5 mol% with respect to all the constituent units.
- the content of the constituent unit (III) is 8.5 to 30 mol% with respect to all the constituent units, and the content of the constituent unit (IV) is 8.5 to 30 mol% with respect to all the constituent units.
- the structural unit (I) is derived from 6-hydroxy-2-naphthoic acid (hereinafter, also referred to as "HNA").
- the total aromatic polyester contains 40 to 75 mol% of the constituent unit (I) with respect to all the constituent units. If the content of the structural unit (I) is less than 40 mol%, the melting point is lowered and the heat resistance is insufficient. In addition, the value of the dielectric loss tangent of the resin composition becomes high. If the content of the structural unit (I) exceeds 75 mol%, solidification occurs during polymerization and no polymer can be obtained.
- the content of the structural unit (I) is preferably 40 to 70 mol%, more preferably 40 to 65 mol%, still more preferably 40 to 63 mol%. , More preferably 40 to 62 mol%, and particularly preferably 40 to 60 mol%.
- the structural unit (II) is derived from one or more hydroxybenzoic acids selected from 2-hydroxybenzoic acid, 3-hydroxybenzoic acid and 4-hydroxybenzoic acid (hereinafter, also referred to as "HBA").
- the structural unit (II) is preferably derived from one or more selected from 3-hydroxybenzoic acid and 4-hydroxybenzoic acid, more preferably from 4-hydroxybenzoic acid (HBA).
- the structural unit (II) is as follows: It is preferable to have at least one structure selected from.
- Ar 1 represents an arylene group.
- the arylene group include a p-phenylene group, an m-phenylene group, an o-phenylene group, a substituted phenylene group, a biphenyl-4,4'-diyl group, a naphthalene-2,6-diyl group, and a naphthalene-2,7.
- -Diyl group, naphthalene-1,6-diyl group, naphthalene-1,4-diyl group and the like can be mentioned.
- the building block (III) is derived from the aromatic dicarboxylic acid.
- the structural unit (III) is 1,4-phenylenedicarboxylic acid (hereinafter, also referred to as “terephthalic acid” or “TA”), 1,3-phenylenedicarboxylic acid (hereinafter, “isophthalic acid” or “IA”). Also referred to as), 2,6-naphthalenedicarboxylic acid, 1,6-naphthalenedicarboxylic acid, 2,7-naphthalenedicarboxylic acid, 1,4-naphthalenedicarboxylic acid, 4,4'-dicarboxybiphenyl, etc., and their thereof.
- TA terephthalic acid
- IA 1,3-phenylenedicarboxylic acid
- 2,6-naphthalenedicarboxylic acid 1,6-naphthalenedicarboxylic acid
- 2,7-naphthalenedicarboxylic acid 1,4-naphthalenedicarboxylic acid
- 4,4'-dicarboxybiphenyl etc.
- the structural unit (III) is preferably derived from one or more selected from 1,4-phenylenedicarboxylic acid, 1,3-phenylenedicarboxylic acid, and 2,6-naphthalenedicarboxylic acid, preferably 1,4-phenylene. It is more preferably derived from a dicarboxylic acid and / or 1,3-phenylenedicarboxylic acid, and even more preferably derived from 1,4-phenylenedicarboxylic acid.
- the structural unit (III) is as follows: It is preferable to have at least one structure selected from.
- the total aromatic polyester contains 8.5 to 30 mol% of the constituent unit (III) with respect to all the constituent units.
- the content of the structural unit (III) is preferably 10 to 30 mol%, more preferably 12 to 28 mol%, and further preferably 14 to 28. It is mol%, more preferably 15 to 28 mol%, and particularly preferably 17 to 27 mol%.
- Ar 2 represents an arylene group.
- the arylene group include p-phenylene group, m-phenylene group, o-phenylene group, substituted phenylene group, biphenyl-4,4'-diyl group, biphenyl-3,3'-diyl, biphenyl-3,4. '-Diyl, naphthalene-2,6-diyl group, naphthalene-2,7-diyl group, naphthalene-1,6-diyl group, naphthalene 1,4-diyl and the like can be mentioned.
- the building block (IV) is derived from the aromatic diol.
- the structural unit (IV) is 4,4'-dihydroxybiphenyl (hereinafter, also referred to as "BP"), 1,4-dihydroxybenzene, 2,6-dihydroxynaphthalene, 2,7-dihydroxynaphthalene, 1, 6-Dihydroxynaphthalene, 1,4-dihydroxynaphthalene, 4,4'-dihydroxybiphenyl, 3,3'-dihydroxybiphenyl, 3,4'-dihydroxybiphenyl, 4,4'-dihydroxybiphenyl ether, etc., and their alkyls. , Alkoxy or halogen substituents, as well as ester-forming derivatives such as these acylated products.
- BP 4,4'-dihydroxybiphenyl
- the structural unit (IV) is preferably derived from one or more selected from 4,4'-dihydroxybiphenyl, 1,4-dihydroxybenzene, and 2,6-dihydroxynaphthalene, preferably 4,4'-dihydroxybiphenyl. It is more preferable that it is derived from (BP).
- the whole aromatic polyester has the following constituent units (I'), (II'), (III') and (IV'): as the constituent units (I) to (IV) which are essential constituents. Is preferably contained.
- the total aromatic polyester may have other structural units other than the structural units (I) to (IV), but from the viewpoint of high rigidity and high fluidity, the structural unit (I) is relative to all the structural units. )-(IV) is preferably configured to contain 100 mol% in total.
- the difference between the content of the structural unit (III) and the content of the structural unit (IV) is preferably 0.145 mol% or less from the viewpoint of suppressing gate clogging and suppressing foreign matter contamination. It is more preferably 0.140 mol% or less, further preferably 0.135 mol% or less, further preferably 0.130 mol% or less, and even more preferably 0.125 mol% or less. Especially preferable.
- All aromatic polyesters exhibit optical anisotropy when melted. Showing optical anisotropy when melted means that the total aromatic polyester is a liquid crystal polymer.
- melt anisotropy can be confirmed by a conventional polarization inspection method using an orthogonal polarizing element. More specifically, the confirmation of melt anisotropy can be carried out by melting a sample placed on a hot stage manufactured by Rinkamu using a polarizing microscope manufactured by Olympus and observing it at a magnification of 150 times in a nitrogen atmosphere.
- the liquid crystalline polymer is optically anisotropic and transmits light when inserted between orthogonal modulators. If the sample is optically anisotropic, polarized light is transmitted even in a molten static liquid state, for example.
- the melting point of the total aromatic polyester is preferably as high as possible from the viewpoint of heat resistance, but it is preferably 380 ° C. or lower in consideration of thermal deterioration during melt processing of the polymer and the heating capacity of the molding machine. It will be a guide.
- the melting point of the total aromatic polyester is more preferably 260 to 370 ° C, still more preferably 270 to 370 ° C, and particularly preferably 280 to 360 ° C from the viewpoint of heat resistance and moldability.
- the “melting point” means the melting point Tm2 measured by a differential scanning calorimeter.
- the melting point Tm2 is the temperature of the peak top (melting point Tm1) at the heat absorption peak observed when heated from room temperature at a heating rate of 20 ° C./min (1stRUN) by a method based on JIS K-7121 (1999). After the measurement, it is observed when it is held at (melting point Tm1 + 40) ° C. for 2 minutes, then cooled to room temperature at a temperature lowering rate of 20 ° C./min, and then heated again from room temperature at a heating rate of 20 ° C./min (2stRUN). The temperature of the peak top at the heat absorption peak of 2ndRUN is used.
- the total aromatic polyester has a cylinder temperature 10 to 40 ° C. higher than the melting point of the total aromatic polyester and a melt viscosity at a shear rate of 1000 / sec is 1000 Pa ⁇ s or less.
- the melt viscosity of the total aromatic polyester is preferably 4 to 500 Pa ⁇ s, more preferably 4 to 250 Pa ⁇ s, and particularly preferably 5 to 100 Pa ⁇ s from the viewpoint of fluidity and moldability. ..
- the melt viscosity means the melt viscosity measured in accordance with ISO11443.
- melt viscosity measured at "cylinder temperature 10 to 40 ° C. higher than the melting point” is appropriately selected depending on the composition of the total aromatic polyester among the temperatures in which the cylinder temperature is 10 to 40 ° C. higher than the melting point Tm2 described above. It means the melt viscosity measured at any one of the above temperatures, and the melt viscosity measured in all the temperature ranges 10 to 40 ° C. higher than the melting point Tm2 does not have to be within the above range.
- the melt viscosity can be adjusted by adjusting the final polymerization temperature at the time of melt polymerization of the total aromatic polyester.
- the total aromatic polyester of the present embodiment is polymerized by using a direct polymerization method, a transesterification method, or the like.
- a melt polymerization method, a solution polymerization method, a slurry polymerization method, a solid phase polymerization method, etc., or a combination of two or more of these is used, and a melt polymerization method or a combination of the melt polymerization method and the solid phase polymerization method is used. Is preferably used.
- the conditions for the polymerization reaction are not particularly limited as long as the polymerization of the above-mentioned constituent units proceeds, and for example, the reaction temperature is 200 to 380 ° C. and the final ultimate pressure is 0.1 to 760 Torr (that is, 13 to 101,080 Pa). ) May be.
- the temperature at the time of the polymerization reaction can be raised stepwise from 140 ° C. to 360 ° C. (divided into two or more steps or three or more steps). By gradually raising the temperature at the time of the polymerization reaction from 140 ° C. to 360 ° C., the content of the structural unit (III) and the content of the structural unit (IV) in the obtained total aromatic polyester The difference can easily be 0.150 mol% or less.
- the temperature can be raised by changing the heating rate by dividing the temperature from 140 ° C to 200 ° C, from 200 ° C to 270 ° C, and from 270 ° C to 360 ° C.
- the heating rate from 140 ° C. to 200 ° C. can be set to 0.4 ° C./min or more and less than 0.8 ° C./min.
- the heating rate from 200 ° C. to 270 ° C. can be set to 0.8 ° C./min or more and 1.2 ° C./min or less.
- the heating rate from 270 ° C. to 360 ° C. can be set to 0.4 ° C./min or more and 1.2 ° C./min or less.
- an acylating agent for the polymerization monomer or a monomer having an activated terminal as an acid chloride derivative can be used in the polymerization.
- the acylating agent include fatty acid anhydrides such as acetic anhydride.
- melt polymerization is carried out by starting depressurization to a predetermined decompression degree.
- an inert gas is introduced, and the pressure is changed from a reduced pressure state to a normal pressure state to a predetermined pressure state, and the total aromatic polyester is discharged from the reaction system.
- the total aromatic polyester produced by the above polymerization method can further increase its molecular weight by solid-phase polymerization in which it is heated under normal pressure, reduced pressure, or in an inert gas.
- Mica is a crushed silicate mineral containing aluminum, potassium, magnesium, sodium, iron, etc.
- Examples of mica include muscovite, phlogopite, biotite, artificial mica, and the like. Of these, muscovite is preferable because it has a good hue and is inexpensive.
- the wet pulverization method is a method in which rough mica is roughly pulverized by a dry pulverizer, water is added, and the main pulverization is performed by wet pulverization in a slurry state, followed by dehydration and drying.
- the dry pulverization method is a low-cost and general method as compared with the wet pulverization method, it is easier to pulverize the mineral thinly and finely by using the wet pulverization method. It is preferable to use a thin and fine pulverized product because it is easier to obtain mica having a preferable average particle size and thickness described later. Therefore, it is preferable to use mica produced by the wet pulverization method.
- the wet pulverization method requires a step of dispersing the object to be crushed in water, it is common to add a coagulation sedimentation agent and / or a sedimentation aid to the object to be pulverized in order to improve the dispersion efficiency of the object to be pulverized. It is a target.
- the mica is preferably one that does not use a coagulation sedimentation agent and / or a sedimentation aid during wet pulverization.
- a coagulation sedimentation agent and / or a sedimentation aid during wet pulverization.
- the polymer in the resin composition is less likely to be decomposed, a large amount of gas is less likely to be generated, and the molecular weight of the polymer is less likely to decrease. Is easier to maintain better.
- the mica preferably has an average particle size of 10 to 100 ⁇ m measured by the microtrack laser diffraction method, and particularly preferably has an average particle size of 20 to 80 ⁇ m.
- the average particle size of mica is 10 to 100 ⁇ m, it is possible to improve the mechanical strength and low warpage while ensuring the fluidity of the resin composition at the time of molding.
- the average thickness actually measured for 100 pieces by observation with an electron microscope is preferably 0.01 to 1 ⁇ m, and particularly preferably 0.03 to 0.3 ⁇ m.
- the average thickness of mica is 0.01 to 1 ⁇ m, the fluidity of the resin composition at the time of molding can be improved.
- the content of mica is 5 to 50% by mass in the total resin composition. By setting the content of mica in the range of 5 to 50% by mass, a resin composition having a low dielectric loss tangent and excellent dielectric properties can be obtained.
- the content of mica is preferably 5 to 45% by mass, more preferably 10 to 45% by mass, from the viewpoint of realizing a lower dielectric loss tangent.
- the release agent is not particularly limited as long as it is generally available, and examples thereof include fatty acid esters, fatty acid metal salts, fatty acid amides, low molecular weight polyolefins, and the like. Fatty acid esters (eg, pentaerythritol tetrastearate) are preferred.
- the amount of the release agent to be blended is preferably in the range of 0.1 to 3% by mass in the resin composition.
- the compounding amount of the mold release agent is 0.1% by mass or more, the mold release property at the time of molding is improved, and it is easy to obtain a molded product having less plating peeling even when it comes into contact with an article having a plating layer on the surface. ..
- the compounding amount of the mold release agent is 3% by mass or less, the mold deposit (that is, the deposit on the mold in molding) is likely to be reduced.
- Inorganic or organic fillers can be added to the resin composition as long as the effects of the present invention are not impaired.
- examples of the inorganic filler include fibrous, powdery, spherical, plate-like fillers other than mica, and hollow fillers.
- the blending amount of the fibrous filler is not particularly limited as long as the dielectric loss tangent of the resin composition does not exceed a predetermined range, and is preferably 5 to 20% by mass, more preferably, in the total resin composition, for example. Is 5 to 15% by mass, more preferably 5 to 10% by mass. It is also possible to configure the structure so that it does not contain a fibrous filler. By setting the content of the fibrous filler in the total resin composition to 5 to 20% by mass, the mechanical strength can be improved.
- powder and granular inorganic fillers include carbon black, graphite, silica, quartz powder, glass beads, glass powder, calcium silicate, aluminum silicate, kaolin, clay, silica clay, iron oxide, titanium oxide, zinc oxide, and three.
- hollow filler examples include spherical hollow bodies, and examples thereof include glass balloons, shirasu balloons, fly ash balloons, carbon balloons, and / or fullerenes having various carbon numbers.
- the blending amount of the hollow filler is not particularly limited as long as the dielectric loss tangent of the resin composition does not exceed a predetermined range, and is preferably 5 to 15% by mass, more preferably 5 to 15% by mass, for example, in the total resin composition. It is 5 to 10% by mass, more preferably 5 to 8% by mass. It is also possible to make a configuration that does not contain a spherical filler. By setting the content of the spherical filler to 5 to 15% by mass in the total resin composition, the dielectric constant can be lowered.
- Examples of the plate-shaped inorganic filler include glass flakes, talc, and various metal foils.
- the blending amount of the plate-shaped filler is not particularly limited as long as the dielectric loss tangent of the resin composition does not exceed a predetermined range, and is, for example, 5 to 20% by mass in the total resin composition. Is preferable, more preferably 5 to 15% by mass, still more preferably 5 to 10% by mass. It is also possible to configure the structure so that it does not contain a plate-like filler other than mica. By setting the content of the plate-shaped filler to 5 to 20% by mass in the total resin composition, the low warpage property can be improved.
- organic fillers include heat-resistant high-strength synthetic fibers such as aromatic polyester fibers, liquid crystal polymer fibers, aromatic polyamides, and polyimide fibers.
- the blending amount of the organic filler is not particularly limited as long as the dielectric loss tangent of the resin composition does not exceed a predetermined range, and is preferably 1 to 20% by mass, more preferably 1 to 20% by mass in the total resin composition, for example. It is 1 to 15% by mass, more preferably 1 to 10% by mass. It is also possible to make a configuration that does not contain an organic filler. By setting the content of the organic filler in the total resin composition to 1 to 20% by mass, the surface property of the molded product can be improved.
- the resin composition may contain other resins other than the total aromatic polyester, and additives such as antioxidants, stabilizers, pigments, and crystal nucleating agents.
- additives such as antioxidants, stabilizers, pigments, and crystal nucleating agents.
- the content of other resins and additives is preferably 20% by mass or less in the resin composition.
- mica is added to the total aromatic polyester, and the total aromatic polyester contains a predetermined structural unit and each structural unit. It is important to keep the content of the above in the above range.
- the dielectric loss tangent may be high, so the content thereof shall be in the range where the dielectric loss tangent at the measurement frequency of 3 GHz of the resin composition is 0.002 or less.
- the content of each filler other than mica is described above, for example, so that the content of each filler can be easily adjusted within the range where the dielectric loss tangent at the measurement frequency of 3 GHz of the resin composition is 0.002 or less.
- the total content of the fillers other than mica is more preferably 5 to 20% by mass, still more preferably 5 to 15% by mass, and particularly preferably 5 to 10% by mass in the total resin composition.
- the glass component may increase the dielectric adjacency, if the glass component such as glass fiber, milled glass fiber, flat glass fiber, low dielectric glass fiber, glass bead, glass powder, glass balloon, or glass flake is contained, the glass component may be increased.
- the total content in the total resin composition is preferably 20% by mass or less, more preferably 15% by mass or less, further preferably 13% by mass or less, and 10% by mass or less. Is particularly preferred.
- the content of the glass balloon is preferably less than 8% by mass, more preferably 7.5% by mass or less in the total resin composition.
- the method for measuring the dielectric loss tangent at a measurement frequency of 3 GHz is a test of 80 mm ⁇ 1 mm ⁇ thickness 1 mm with the resin flow direction as the longitudinal direction from a flat plate-shaped molded product of 80 mm ⁇ 80 mm ⁇ thickness 1 mm molded using a resin composition.
- the test piece cut out is used for measurement by a cavity resonator permittivity method complex permittivity evaluation device.
- the resin composition has a relative permittivity of preferably 4.50 or less, more preferably 4.30 or less, and further preferably 4.20 or less.
- a resin composition that gives a molded product having a low dielectric constant can be obtained.
- the melt viscosity of the resin composition is preferably 1000 Pa ⁇ s or less as a cylinder temperature 10 to 40 ° C. higher than the melting point of the total aromatic polyester and a melt viscosity at a shear rate of 1000 / sec.
- the melt viscosity of the resin composition is preferably 4 to 500 Pa ⁇ s, more preferably 4 to 250 Pa ⁇ s, and particularly preferably 5 to 100 Pa ⁇ s. Is.
- the method for producing the resin composition is not particularly limited, and the resin composition can be prepared by a conventionally known method.
- the resin composition is prepared by blending each component and melt-kneading them using a single-screw or twin-screw extruder.
- the molded product according to the present embodiment can be obtained by molding the above resin composition.
- the molding method is not particularly limited, and a general molding method can be adopted. Examples of general molding methods include injection molding, extrusion molding, compression molding, blow molding, vacuum molding, foam molding, rotary molding, gas injection molding, and inflation molding.
- the molded product preferably has a flexural modulus of 12,000 MPa or more measured in accordance with ISO178. From the viewpoint of preventing damage due to deformation, the molded product preferably has a bending strength of 160 MPa or more measured in accordance with ISO178.
- the temperature of the reaction system was raised to 140 ° C, and the reaction was carried out at 140 ° C for 1 hour. After that, the temperature is further raised under the speed conditions shown in Table 1, and the pressure is reduced to 10 Torr (that is, 1330 Pa) over 20 minutes, and melt polymerization is carried out while distilling acetic acid, excess acetic anhydride, and other low boiling points. gone.
- the stirring torque reaches a predetermined value, nitrogen is introduced to reduce the pressure from a reduced pressure state to a pressurized state via normal pressure, and the product is discharged from the lower part of the polymerization vessel and pelletized to obtain a pellet-shaped prepolymer. rice field.
- the obtained prepolymer was heat-treated (solid-phase polymerization) at 300 ° C. for 3 hours under a nitrogen stream to obtain a desired liquid crystal resin (total aromatic polyester).
- 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 is further raised to 340 ° C. over 4.5 hours, and then the pressure is reduced to 10 Torr (that is, 1330 Pa) over 15 minutes to melt while distilling acetic acid, excess acetic anhydride, and other low boiling points. Polymerization was performed. After the stirring torque reaches a predetermined value, nitrogen is introduced to reduce the pressure from a reduced pressure state to a pressurized state via normal pressure, and the product is discharged from the lower part of the polymerization vessel and pelletized to obtain a pellet-shaped prepolymer. rice field. The obtained prepolymer was heat-treated (solid-phase polymerization) at 300 ° C. for 2 hours under a nitrogen stream to obtain the desired liquid crystal resin (total aromatic polyesteramide).
- the temperature of the reaction system was raised to 140 ° C, and the reaction was carried out at 140 ° C for 3 hours. Then, the temperature is further raised to 360 ° C. over 4.5 hours, and then the pressure is reduced to 10 Torr (that is, 1330 Pa) over 15 minutes to melt acetic acid, excess acetic anhydride, and other low boiling points. Polymerization was performed. After the stirring torque reaches a predetermined value, nitrogen is introduced to change the pressure from a reduced pressure state to a pressurized state through normal pressure, and the product is discharged from the lower part of the polymerization vessel and pelletized to form a pellet-shaped target liquid crystal. A sex resin (total aromatic polyester) was obtained.
- the melt viscosity of the liquid crystal resin of the production example was measured using the above pellets. Specifically, by using a capillary rheometer (manufactured by Toyo Seiki Seisakusho Co., Ltd., Capillograph 1D: piston diameter 10 mm), the cylinder temperature is 10 to 40 ° C higher than the melting point of the liquid crystal resin, and the shear rate is 1000 sec -1 . The apparent melt viscosity in was measured according to ISO11443. An orifice having an inner diameter of 1 mm and a length of 20 mm was used for the measurement. The specific measurement temperature was 380 ° C. for the liquid crystal resin of Production Example 1, 350 ° C. for the liquid crystal resin of Production Example 2, and 350 ° C. for the liquid crystal resin of Production Example 3. The results are shown in Table 1.
- the monomer composition was calculated by the pyrolysis gas chromatography method described in Polymer Degradation and Stability 76 (2002) 85-94. Specifically, using a pyrolysis device (“PY2020iD” manufactured by Frontier Lab Co., Ltd.), all aromatic polyester is heated in the coexistence of tetramethylammonium hydroxide (TMAH), and gas is pyrolyzed / methylated. Was generated. This gas was analyzed using gas chromatography (“GC-6890N” manufactured by Azilent Technology Co., Ltd.), and the peak area derived from 1,4-phenylenedicarboxylic acid and the peak derived from 4,4'-dihydroxybiphenyl were analyzed.
- TMAH tetramethylammonium hydroxide
- Examples 1 to 9, Comparative Examples 1 to 3 The liquid crystal resin obtained in Production Example 1 and the materials shown in Table 1 are melt-kneaded at the ratio shown in Table 1 using a twin-screw extruder (TEX30 ⁇ type manufactured by Japan Steel Works, Ltd.) at a cylinder temperature of 370 ° C. Then, resin composition pellets were obtained.
- a twin-screw extruder TEX30 ⁇ type manufactured by Japan Steel Works, Ltd.
- the resin compositions of Examples 1 to 9 have a dielectric loss tangent of 0.002 or less at a measurement frequency of 3 GHz, and can provide a molded product having a low dielectric loss tangent.
- the excellent fluidity, rigidity, mechanical strength, and heat resistance of all aromatic polyesters can be sufficiently exhibited.
- the resin compositions of Comparative Examples 1 to 5 have a dielectric loss tangent of more than 0.002 at a measurement frequency of 3 GHz, resulting in a molded product having a higher dielectric loss tangent than that of the examples.
- Example 7 and Comparative Example 2 Example 8 and Example 9, and Example 2 and Comparative Example 3, even when the relative permittivity is about the same, the dielectric loss tangent is high. It may be different, and low dielectric constant resin compositions may not always be able to achieve low dielectric loss tangent.
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Abstract
Description
[1]全芳香族ポリエステル及びマイカを含有し、全芳香族ポリエステルは、必須の構成成分として、下記構成単位(I)、(II)、(III)及び(IV):
(式中、Ar1及びAr2は、それぞれ独立して、アリーレン基を表す)
を含有し、全芳香族ポリエステルの全構成単位に対して、構成単位(I)の含有量が40~75モル%であり、構成単位(II)の含有量が0.5~7.5モル%であり、構成単位(III)の含有量が8.5~30モル%であり、構成単位(IV)の含有量が8.5~30モル%であり、
全芳香族ポリエステルの含有量が樹脂組成物の全量に対して50~95質量%であり、
マイカの含有量が樹脂組成物の全量に対して5~50質量%であり、
測定周波数3GHzにおける誘電正接が0.002以下である、樹脂組成物。
[2]測定周波数3GHzにおける誘電正接が0.001以下である、[1]に記載の樹脂組成物。
[3]全芳香族ポリエステル中の構成単位(III)の含有量と構成単位(IV)の含有量との差が0.150モル%以下である、[1]又は[2]に記載の樹脂組成物。
[4]全芳香族ポリエステルの全構成単位に対して構成単位(I)、(II)、(III)及び(IV)の合計の含有量が100モル%である、[1]から[3]のいずれかに記載の樹脂組成物。
[5]アンテナ基板又は高速通信用コネクタ製造用である、[1]から[4]のいずれかに記載の樹脂組成物。
[6]アンテナ基板又は高速通信用コネクタを製造するための、[1]から[4]のいずれかに記載の樹脂組成物の使用。
[7][1]から[5]のいずれかに記載の樹脂組成物を含む、成形品。
[8]アンテナ基板又は高速通信用コネクタである、[7]に記載の成形品。
本実施形態に係る樹脂組成物は、全芳香族ポリエステル及びマイカを含有する。
(全芳香族ポリエステル)
全芳香族ポリエステルは、必須の構成成分として、下記構成単位(I)、(II)、(III)及び(IV):
(式中、Ar1及びAr2は、それぞれ独立して、アリーレン基を表す。)
を含有する。
全構成単位に対して構成単位(I)の含有量は40~75モル%であり、全構成単位に対して構成単位(II)の含有量は0.5~7.5モル%であり、全構成単位に対して構成単位(III)の含有量は8.5~30モル%であり、全構成単位に対して構成単位(IV)の含有量は8.5~30モル%である。
構成単位(II)は、以下:
から選択される少なくとも1つの構造を有していることが好ましい。
全芳香族ポリエステルの融点は、でき得る限り高い方が耐熱性の観点からは好ましいが、ポリマーの溶融加工時の熱劣化や成形機の加熱能力等を考慮すると、380℃以下であることが好ましい目安となる。全芳香族ポリエステルの融点は、耐熱性及び成形性の観点から、より好ましくは260~370℃であり、更により好ましくは270~370℃であり、特に好ましくは280~360℃である。
一実施形態において、重合反応時の温度を140℃から360℃まで段階的に分けて(2段階以上、又は3段階以上に分けて)昇温させることができる。重合反応時の温度を140℃から360℃まで段階的に分けて昇温させることで、得られる全芳香族ポリエステル中の構成単位(III)の含有量と構成単位(IV)の含有量との差を容易に0.150モル%以下にすることができる。
一実施形態において、140℃から200℃、200℃から270℃、270℃から360℃に分けて昇温速度を変更して昇温させることができる。
一実施形態において、140℃から200℃への昇温速度を、0.4℃/分以上0.8℃/分未満にすることができる。200℃から270℃への昇温速度を、0.8℃/分以上1.2℃/分以下にすることができる。270℃から360℃への昇温速度を、0.4℃/分以上1.2℃/分以下にすることができる。
マイカは、板状無機充填剤として一般的に用いられている。本発明者の研究により、上記した全芳香族ポリエステルにマイカ以外の他の板状無機充填剤を添加した場合は樹脂組成物の誘電正接が高くなってしまうが、マイカを添加した場合は、驚くべきことに、誘電正接が低い樹脂組成物が得られることが分かった。
マイカは、湿式粉砕する際に凝集沈降剤及び/又は沈降助剤を使用していないものが好ましい。凝集沈降剤及び/又は沈降助剤で処理されていないマイカを使用すると、樹脂組成物中のポリマーの分解が生じにくく、多量のガス発生やポリマーの分子量低下等が起きにくいため、成形品の性能をより良好に維持するのが容易である。
全芳香族ポリエステルの含有量は、全樹脂組成物中に50~95質量%である。全芳香族ポリエステルの含有量を50~95質量%の範囲内にすることで、全芳香族ポリエステルが有する優れた流動性、剛性、機械強度、耐熱性、耐薬品性、電気的性質等を十分に発現させることができる。樹脂組成物中の全芳香族ポリエステルの含有量は、耐熱性、高剛性、高流動性の観点から、好ましくは55~95質量%であり、より好ましくは60~90質量%である。
樹脂組成物には、離型剤を配合することが好ましい。離型剤としては、一般的に入手可能なものであれば、特に限定されるものではなく、例えば、脂肪酸エステル類、脂肪酸金属塩類、脂肪酸アミド類、低分子量ポリオレフィン等が挙げられ、ペンタエリスリトールの脂肪酸エステル(例えば、ペンタエリスリトールテトラステアレート)が好ましい。
樹脂組成物には、本発明の効果を阻害しない範囲で、無機又は有機充填剤を配合することができる。無機充填剤としては、繊維状、粉粒状、球状、マイカ以外の板状充填剤、及び中空充填剤等が挙げられる。
樹脂組成物は、全芳香族ポリエステル以外のその他の樹脂や、酸化防止剤、安定剤、顔料、結晶核剤等の添加剤を含有していてもよい。その他の樹脂及び添加剤の含有量は、樹脂組成物中に20質量%以下であることが好ましい。
本実施形態に係る樹脂組成物は、測定周波数3GHzにおける誘電正接が、0.002以下である。測定周波数3GHzにおける誘電正接が0.002以下であるので、誘電正接が低い成形品を与えることができる。樹脂組成物は、測定周波数3GHzにおける誘電正接が、好ましくは0.0015以下であり、より好ましくは0.001以下である。
マイカ以外の他の充填剤を含有する場合は誘電正接が高くなることがあるので、その含有量は、樹脂組成物の測定周波数3GHzにおける誘電正接が0.002以下となる範囲とする。マイカ以外の他の充填剤の含有量は、樹脂組成物の測定周波数3GHzにおける誘電正接が0.002以下となる範囲に容易に調整可能なように、例えば各充填剤の含有量がそれぞれ上記した範囲内から選択されることが好ましい。マイカ以外の他の充填剤の総含有量が、全樹脂組成物中に5~20質量%であることがより好ましく、さらに好ましくは5~15質量%であり、特に好ましくは5~10質量%である。
ガラス成分は誘電正接を高くさせることがあるので、ガラス繊維、ミルドガラスファイバー、扁平ガラス繊維、低誘電ガラス繊維、ガラスビーズ、ガラス粉、ガラスバルーン、ガラスフレーク等のガラス成分を含む場合は、その含有量は、全樹脂組成物中に合計で20質量%以下であることが好ましく、15質量%以下であることがより好ましく、13質量%以下であることがさらに好ましく、10質量%以下であることが特に好ましい。
一実施形態において、ガラスバルーンの含有量が、全樹脂組成物中に8質量%未満であることが好ましく、7.5質量%以下であることがより好ましい。
本実施形態に係る樹脂組成物は、耐熱性、高機械強度、高剛性及び高流動性を有しているので、種々の立体成形品、繊維、フィルム等に加工できる。例えば、コネクタ、CPUソケット、リレースイッチ部品、ボビン、アクチュエータ、ノイズ低減フィルターケース、電子回路基板又はOA機器の加熱定着ロール等の製造に好ましく用いることができる。中でも、この樹脂組成物は、誘電正接が低い成形品を与えることができるので、情報通信分野における部品、例えばアンテナ基板又は高速通信用コネクタの製造に好ましく用いることができる。
により求められる。上記式において、ε’rは比誘電率であり、tanδは誘電性正接である。上記式からわかるように、伝送損失は誘電正接に比例する。本実施形態に係る樹脂組成物は、誘電正接が低いので伝送損失を低減することができる。
本実施形態に係る成形品は、上記樹脂組成物を成形して得ることができる。成形方法としては、特に限定されず一般的な成形方法を採用することができる。一般的な成形方法としては、射出成形、押出成形、圧縮成形、ブロー成形、真空成形、発泡成形、回転成形、ガスインジェクション成形、インフレーション成形等の方法を例示することができる。
撹拌機、還流カラム、モノマー投入口、窒素導入口、減圧/流出ラインを備えた重合容器に、以下の原料モノマー、脂肪酸金属塩触媒、アシル化剤を仕込み、窒素置換を開始した。
(I)6-ヒドロキシ-2-ナフトエ酸 0.883モル(48モル%)(HNA)
(II)4-ヒドロキシ安息香酸 0.037モル(2モル%)(HBA)
(III)1,4-フェニレンジカルボン酸 0.46モル(25モル%)(TA)
(IV)4,4’-ジヒドロキシビフェニル 0.46モル(25モル%)(BP)
酢酸カリウム触媒 150ppm
トリス(2,4-ペンタンジオナト)コバルト(III)触媒 150ppm
無水酢酸 1.91モル(HBAとBPとの合計の水酸基当量の1.04倍)
撹拌機、還流カラム、モノマー投入口、窒素導入口、減圧/流出ラインを備えた重合容器に、以下の原料モノマー、脂肪酸金属塩触媒、アシル化剤を仕込み、窒素置換を開始した。
(I)6-ヒドロキシ-2-ナフトエ酸 157g(5モル%)(HNA)
(II)4-ヒドロキシ安息香酸 1380g(60モル%)(HBA)
(III)1,4-フェニレンジカルボン酸 484g(17.5モル%)(TA)
(IV)4,4’-ジヒドロキシビフェニル 388g(12.5モル%)(BP)
(V)N-アセチル-p-アミノフェノール 126(5モル%)(APAP)
酢酸カリウム触媒 110mg
無水酢酸 1659g
撹拌機、還流カラム、モノマー投入口、窒素導入口、減圧/流出ラインを備えた重合容器に、以下の原料モノマー、脂肪酸金属塩触媒、アシル化剤を仕込み、窒素置換を開始した。
(II)4-ヒドロキシ安息香酸(HBA):1347g(60モル%)
(III)1,4-フェニレンジカルボン酸(TA):378g(14モル%)
(III)1,3-フェニレンジカルボン酸(IA):162g(6モル%)
(IV)4,4’-ジヒドロキシビフェニル(BP):605g(20モル%)
酢酸カリウム触媒 330mg
無水酢酸 1710g
液晶性樹脂の溶融粘度、融点、重合時の昇華物量、モノマー組成(含有量)の測定方法は以下のとおりである。
製造例の液晶性樹脂の溶融粘度を、上記ペレットを用いて測定した。
具体的には、キャピラリー式レオメーター((株)東洋精機製作所製、キャピログラフ1D:ピストン径10mm)により、液晶性樹脂の融点よりも10~40℃高いシリンダー温度で、剪断速度1000sec-1の条件での見かけの溶融粘度をISO11443に準拠して測定した。測定には、内径1mm、長さ20mmのオリフィスを用いた。
なお、具体的な測定温度は、製造例1の液晶性樹脂については380℃、製造例2の液晶性樹脂については350℃、製造例3の液晶性樹脂については350℃であった。結果を表1に示す。
示差走査熱量計(DSC、パーキンエルマー社製)にて、液晶性樹脂を室温から20℃/分の昇温条件で加熱した際に観測される吸熱ピーク温度(Tm1)の測定後、(Tm1+40)℃の温度で2分間保持した後、20℃/分の降温条件で室温まで一旦冷却した後、再度、20℃/分の昇温条件で加熱した際に観測される吸熱ピークの温度(Tm2)を測定した。結果を表1に示す。
上述の溶融重合において、還流カラムおよびリアクター上部の質量変化から、液晶性樹脂の重合時の昇華物量を測定した。結果を表1に示す。なお、表1において「-」は未測定であることを示す。
Polymer Degradation and Stability 76(2002)85-94に記載される、熱分解ガスクロマトグラフィー法によってモノマー組成を算出した。具体的には、熱分解装置(フロンティア・ラボ(株)製「PY2020iD」)を用いて、全芳香族ポリエステルを水酸化テトラメチルアンモニウム(TMAH)共存下で加熱し、熱分解/メチル化によりガスを発生させた。このガスをガスクロマトグラフィー(アジレント・テクノロジー(株)製「GC-6890N」)を用いて分析し、1,4-フェニレンジカルボン酸に由来するピーク面積と4,4’-ジヒドロキシビフェニルに由来するピーク面積との比から、1,4-フェニレンジカルボン酸から誘導される構成単位の含有量と4,4’-ジヒドロキシビフェニルから誘導される構成単位の含有量との差を算出した。結果を表1に示す。なお、表1において「-」は未測定であることを示す。
液晶性樹脂以外の材料を以下に示す。
マイカ:AB-25S((株)ヤマグチマイカ製、平均粒子径24μm)
タルク:クラウンタルクPP(松村産業(株)製、平均粒子径10μm)
ミルドガラスファイバー:EPH-80M(日本電気硝子(株)製、繊維径10.5μm、平均繊維長80μm)
扁平ガラス繊維:CSG3PA-830(日東紡績(株)製、長径28μm、短径7μm、長さ3mmの異形断面チョップドストランド)
低誘電ガラス繊維:TLD-CS10-3.0-T-436S(泰山ガラス繊維有限公司製、繊維径13.5μm、長さ3mmの低誘電チョプドストランド)
ガラス繊維:ECS03T-786H(日本電気硝子(株)製、繊維径10μm、長さ3mmのチョプドストランド)
ガラスバルーン:Y12000((株)セイシン企業製、平均粒子径(D50)35μm)
製造例1で得られた液晶性樹脂及び表1に示す材料を表1に示す割合で、二軸押出機((株)日本製鋼所製TEX30α型)を用いて、シリンダー温度370℃で溶融混練し、樹脂組成物ペレットを得た。
製造例2で得られた液晶性樹脂及び表1に示す材料を表1に示す割合で、二軸押出機((株)日本製鋼所製TEX30α型)を用いて、シリンダー温度350℃で溶融混練し、樹脂組成物ペレットを得た。
製造例3で得られた液晶性樹脂及び表1に示す材料を表1に示す割合で、二軸押出機((株)日本製鋼所製TEX30α型)を用いて、シリンダー温度340℃で溶融混練し、樹脂組成物ペレットを得た。
(溶融粘度)
実施例及び比較例の樹脂組成物の溶融粘度を、上記ペレットを用いて測定した。
具体的には、キャピラリー式レオメーター((株)東洋精機製作所製、キャピログラフ1D:ピストン径10mm)により、液晶性樹脂の融点よりも10~40℃高いシリンダー温度で、剪断速度1000sec-1の条件での見かけの溶融粘度をISO11443に準拠して測定した。測定には、内径1mm、長さ20mmのオリフィスを用いた。
なお、具体的な測定温度は、実施例1~9、比較例1~3の樹脂組成物については380℃、比較例4の樹脂組成物については350℃、比較例5の樹脂組成物については350℃であった。結果を表1に示す。
実施例及び比較例のペレットを、成形機(住友重機械工業(株)製「SE100DU」)を用いて、以下の成形条件で成形し、ISO試験片A形を得た。この試験片を切り出し、測定用試験片(80mm×10mm×4mm)を得た。この測定用試験片を用いて、ISO 178に準拠し、曲げ強度及び曲げ弾性率を測定した。結果を表1に示す。
〔成形条件〕
シリンダー温度:
370℃(実施例1~9、比較例1~3)
350℃(比較例4)
350℃(比較例5)
金型温度:90℃
射出速度:33mm/sec
実施例及び比較例のペレットを、成形機(住友重機械工業(株)製「SE-100DU」)を用いて、以下の成形条件で成形し、80mm×80mm×1mmの平板状成形品(図1を参照)を作製した。図1に示すとおり、80mm×80mm×1mmの平板状成形品の流動方向(A)に沿う一辺から内側に10mmの箇所から、流動方向Aが長手方向になるように80mm×1mm×1mmの試験片(2)を切り出し、これを比誘電率測定用試験片とした。なお、図1の符号1は、ゲートを示す。
〔成形条件〕
シリンダー温度:
370℃(実施例1~9、比較例1~3)
350℃(比較例4)
350℃(比較例5)
金型温度:80℃
射出速度:33mm/sec
保圧:60MPa
カラーネットワークアナライザー:アジレントテクノロジー8757D
周波数シンセサイザー:アジレントテクノロジー83650LスイープCWジェネレータ
固定減衰器:アジレントテクノロジー85025Dディテクター
空洞共振器:関東電子応用開発CP431
測定プログラム:関東電子応用開発CPMA-S2/V2
実施例1~9、比較例1~3の樹脂組成物について、図2に示す金型を用いて、以下の条件で射出成形し成形安定性の評価を行った。結果を表1に示す。なお、表1において「-」は未測定であることを示す。
〔成形条件〕
金型:トンネルゲート型、ゲート直径0.1mm、2個取り(同じ形状の金型2個に同時に射出する)
シリンダー温度:
370℃(実施例1~9、比較例1~3)
金型温度:80℃
射出速度:33mm/sec
保圧:50MPa
ショット数:360ショット
〔成形安定性〕
成形安定性を、以下の基準で評価した。
2:ゲート詰まりが発生しない。
1:ゲート詰まりが1回以上発生する。
これに対して、比較例1~5の樹脂組成物は、測定周波数3GHzにおける誘電正接が0.002を超えており、実施例よりも誘電正接が高い成形品となってしまう。
なお、実施例7と比較例2、実施例8と実施例9、実施例2と比較例3のそれぞれの対比から明らかなように、比誘電率が同程度の場合であっても誘電正接が異なることがあり、低誘電率の樹脂組成物が必ずしも低誘電正接を実現できるわけではない。
2 試験片
A 流動方向
Claims (8)
- 全芳香族ポリエステル及びマイカを含有し、
全芳香族ポリエステルは、必須の構成成分として、下記構成単位(I)、(II)、(III)及び(IV):
(式中、Ar1及びAr2は、それぞれ独立して、アリーレン基を表す)
を含有し、
全芳香族ポリエステルの全構成単位に対して、構成単位(I)の含有量が40~75モル%であり、構成単位(II)の含有量が0.5~7.5モル%であり、構成単位(III)の含有量が8.5~30モル%であり、構成単位(IV)の含有量が8.5~30モル%であり、
全芳香族ポリエステルの含有量が樹脂組成物の全量に対して50~95質量%であり、
マイカの含有量が樹脂組成物の全量に対して5~50質量%であり、
測定周波数3GHzにおける誘電正接が0.002以下である、樹脂組成物。 - 測定周波数3GHzにおける誘電正接が0.001以下である、請求項1に記載の樹脂組成物。
- 全芳香族ポリエステル中の構成単位(III)の含有量と構成単位(IV)の含有量との差が0.150モル%以下である、請求項1又は2に記載の樹脂組成物。
- 全芳香族ポリエステルの全構成単位に対して構成単位(I)、(II)、(III)及び(IV)の合計の含有量が100モル%である、請求項1から3のいずれか一項に記載の樹脂組成物。
- アンテナ基板又は高速通信用コネクタ製造用である、請求項1から4のいずれか一項に記載の樹脂組成物。
- アンテナ基板又は高速通信用コネクタを製造するための、請求項1から4のいずれか一項に記載の樹脂組成物の使用。
- 請求項1から5のいずれか一項に記載の樹脂組成物を含む、成形品。
- アンテナ基板又は高速通信用コネクタである、請求項7に記載の成形品。
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| KR1020237002359A KR102601520B1 (ko) | 2020-07-16 | 2021-07-15 | 수지 조성물 및 그의 성형품 |
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| KR20230019984A (ko) | 2023-02-09 |
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| JP7048828B1 (ja) | 2022-04-05 |
| JPWO2022014663A1 (ja) | 2022-01-20 |
| CN116134553A (zh) | 2023-05-16 |
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| CN116134553B (zh) | 2024-08-13 |
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