WO2018212279A1 - 複合粒子材料及びその製造方法、複合粒子材料スラリー、樹脂組成物 - Google Patents
複合粒子材料及びその製造方法、複合粒子材料スラリー、樹脂組成物 Download PDFInfo
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- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
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- C08J3/00—Processes of treating or compounding macromolecular substances
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- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
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- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/205—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase
- C08J3/21—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase the polymer being premixed with a liquid phase
- C08J3/215—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase the polymer being premixed with a liquid phase at least one additive being also premixed with a liquid phase
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/01—Use of inorganic substances as compounding ingredients characterized by their specific function
- C08K3/013—Fillers, pigments or reinforcing additives
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C08K9/00—Use of pretreated ingredients
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- C08L101/00—Compositions of unspecified macromolecular compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B9/00—Making granules
- B29B9/12—Making granules characterised by structure or composition
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- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
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- C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08J2327/18—Homopolymers or copolymers of tetrafluoroethylene
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2244—Oxides; Hydroxides of metals of zirconium
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- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
Definitions
- the present invention relates to a composite particle material used by mixing in a resin composition for an electronic material formed by fusing an inorganic particle material on the surface of a particle material made of a resin, a method for producing the same, and the composite particles
- the present invention relates to a composite particle material slurry containing a material and a resin composition.
- a resin composition before curing using a resin particle material for the purpose of improving electrical characteristics by adding different materials and dimensional stability after curing. It has been carried out in (pre-curing resin composition).
- a fluororesin having a C—F bond is used for improving electrical characteristics.
- the resin particle material often has low affinity with an organic solvent or an organic material, and surface modification is not easy.
- the present applicant has proposed a composite particle material in which the surface of a resin particle material (polytetrafluoroethylene: made of PTFE) is coated with an inorganic particle material made of silica (Patent Document 1).
- the inorganic material constituting the inorganic particle material can be easily imparted with necessary performance by surface treatment with a silane coupling agent or the like, and an effect of improving the affinity with the pre-curing resin composition to be mixed can be expected.
- the composite particle material disclosed in Patent Document 1 has improved dispersibility in a solvent or the like, it is a method of embedding the inorganic particle material against the surface of the resin particle material by external force, and thus the obtained composite particle material In some cases, unnecessary stress may remain. Moreover, since it was only pressed and embedded, it was found that the inorganic particle material and the resin particle material were not sufficiently bonded, and the adhesion with the resin composition was poor. As a result, it was found that when used for electronic materials, the affinity with the metal used in the wiring is lowered.
- the present invention has been completed in view of the above circumstances, and an object to be solved is to provide a composite particle material in which an inorganic particle material is uniformly and firmly bonded to the surface of a resin particle material and a manufacturing method thereof.
- the present inventors can fuse the resin particle material and the inorganic particle material uniformly and firmly and improve the affinity with the metal.
- the method for producing a composite particle material of the present invention is a glass transition of the resin particle material in a state where the resin particle material and the inorganic particle material are suspended in a medium composed of a gas and / or a liquid. It is characterized by having a fusing step in which the inorganic particle material is fused to the surface of the resin particle material by being put in a high temperature atmosphere above the point or the softening point. The fusing process is performed under the condition that OH (hereinafter sometimes referred to as “surface OH group”) is generated on the surface of the inorganic particle material.
- the composite particle material manufactured by manufacture of this invention is used suitably for mixing in the resin composition for electronic materials used in contact with metal wiring.
- Resin bonding can be realized by softening or dissolving the surface of the resin particle material and fusing the inorganic particle material. Since the fusion proceeds without applying external force, the resin particle material and the inorganic particle material can be joined by fusion while maintaining a uniform state after mixing. Since the resin particle material and the inorganic particle material are put in a high-temperature atmosphere in a state of being suspended in a medium, fusion / aggregation between the resin particle materials is difficult to proceed.
- the composite particle material of the present invention that solves the above problems includes a resin particle material and an inorganic particle material that has a smaller particle size than the resin particle material and is fused to the surface of the resin particle material.
- the composite particle material of the present invention satisfies the following conditions (a), (b), and (c).
- the inorganic particle material is formed of an inorganic oxide and has an OH base formed by fusing on the surface. Have.
- the composite particle material of the present invention is suitably used for mixing in a resin composition for electronic materials used in contact with a metal wiring.
- the inorganic particle material is fused to the surface of the resin particle material, even if dispersed in a solvent or a resin composition before curing (or a resin composition before curing after curing), the inorganic particle material will fall off. In addition, since the aggregation and fiberization caused by the resin particles can be suppressed, the aggregation of the composite particle material hardly occurs. In addition, when the resin composition is dispersed in the pre-curing resin composition to be cured and used in contact with a member made of a metal such as a copper material, it has excellent adhesion after curing. .
- the particle size of the inorganic particle material employed is preferably from 1/10 to 1/10000, more preferably relative to the particle size of the resin particle material. 1/50 to 1/5000. By setting it within this range, the inorganic particle material can be more uniformly arranged on the surface of the resin particle material.
- the sea-island structure is not observed when the slurry dispersed in methyl ethyl ketone at a concentration of 20% by mass is observed with an optical microscope.
- 40% by mass or 60% by mass can be adopted instead of the concentration of 20% by mass.
- the result determined by adopting 40% by mass or 60% by mass is different from the result determined by adopting 20% by mass, the result of 20% by mass is given priority.
- the inorganic particle material uniformly adheres to the surface of the resin particle material.
- the particles that make up the composite particle material act uniformly on each other, making it difficult for agglomeration and the like to occur and being uniformly dispersed in methyl ethyl ketone. Therefore, the sea-island structure is not observed. The determination whether or not “the sea-island structure is not observed” will be described in detail in the embodiment.
- the resin particle material is preferably composed of a fluororesin.
- the fluororesin has a low affinity for the solvent and the pre-curing resin composition, and aggregation tends to occur as it is, but the formation of aggregation can be suppressed by using a composite particle material that is firmly coated with an inorganic particle material.
- the inorganic particle material is preferably surface-treated with a silane coupling agent.
- the surface treatment with a silane coupling agent with an appropriate functional group improves the adhesion of the resin material to be fused to the surface, and also the solvent and pre-curing solvent for mixing and dispersing the resulting composite particle material. Affinity with the resin composition can be improved, aggregation can be effectively suppressed, and bonding when the pre-curing resin composition is cured can be strengthened.
- the resin particle material is brought into contact with the high temperature atmosphere until the sphericity of the obtained composite particle material becomes 0.8 or more.
- the stress is released and the sphere is approached, so that the sphericity can be improved.
- the composite particle material and the method for producing the same of the present invention can provide a composite particle material in which the inorganic particle material is firmly bonded to the surface of the resin particle material by having the above-described configuration.
- the inorganic particle material can be uniformly arranged on the surface of the resin particle material.
- the composite particle material of the present invention and the production method thereof will be described in detail based on the following embodiments.
- the composite particle material of this embodiment can be used as a filler dispersed in the pre-curing resin composition. It can give to the resin composition before hardening which disperse
- a composite particle material containing a fluororesin having a low dielectric constant can reduce the dielectric constant of the pre-curing resin composition added by adding it to the pre-curing resin composition.
- the resin composition before curing to which the composite particle material of this embodiment can be added / dispersed is a precursor of a thermosetting resin material (epoxy resin, polyester resin, urea resin, silicon resin, etc .; Examples thereof include those having fluidity), monomers of thermoplastic resins (polyphenylene ether resins, modified polyphenylene ether resins, polyimide resins, liquid crystal polymer resins, etc.), and melts obtained by heating and melting thermoplastic resins. Since the composite particle material of this embodiment is excellent in adhesiveness with the metal which comprises wiring, it can be mixed and used for the resin composition for electronic materials used in contact with metal wiring.
- the composite particle material of the present embodiment has a resin particle material and an inorganic particle material.
- the inorganic particle material is fused to the surface of the resin particle material.
- the abundance ratio between the inorganic particle material and the resin particle material is not particularly limited.
- the surface of the resin particle material is modified by the inorganic particle material being fused to the surface.
- a free inorganic particle material or a resin particle material may be present.
- the particle size of the composite particle material of this embodiment is 0.1 ⁇ m to 100 ⁇ m.
- the coarse particles having a particle size larger than the smallest gap in the portion filled with the resin composition are not substantially contained (
- the upper limit of the content of coarse particles is preferably 1000 ppm, 500 ppm, 200 ppm, 100 ppm, 50 ppm).
- the coarse particles having a particle size of 50 ⁇ m or more are preferably 1000 ppm or less, more preferably 500 ppm or less, still more preferably 200 ppm or less.
- the inorganic particle material is arranged uniformly on the surface of the resin particle material. Whether or not they are uniformly arranged can be determined by the presence or absence of a sea-island structure in a slurry state.
- Whether the sea-island structure exists or not is determined by observing a slurry prepared by dispersing the composite particle material of the present embodiment in methyl ethyl ketone at 20% by mass with an optical microscope. Since the sea-island structure is observed by the part composed of methyl ethyl ketone and the part where the dispersed composite particle material is agglomerated, the sea-island structure is not observed when uniformly dispersed.
- the field of view when observing for determination of the sea-island structure is about 100 to 1000 times the particle size of the composite particle material. Particularly, it is performed 200 times based on the particle diameter of the composite particle material.
- Resin particle material is particles composed of fluororesin.
- the resin constituting the resin particle material softens or melts when heated.
- the fluororesin is not particularly limited, but tetrafluoroethylene (PTFE), perfluoroalkoxyalkane (PFA), perfluoroethylene propene copolymer (FEP), ethylene-tetrafluoroethylene copolymer (ETFE), polyvinylidene fluoride (PVDF) And polychlorotrifluoroethylene (PCTFE), ethylene-chlorotrifluoroethylene polymer (ECTFE), tetrafluoroethylene-perfluorodioxole copolymer (TFE / PDD), and polyvinyl fluoride (PVF). Two or more types may be used.
- the particle size of the resin particle material is selected so that the particle size of the obtained composite particle material is within the above-mentioned range although it is not particularly limited because the appropriate size and particle size distribution change depending on the application.
- the thickness can be about 0.05 ⁇ m to 100 ⁇ m.
- the composite particle material is employed as the filler used for the electronic component material, it is also preferable to remove in advance the resin particle material having a particle size larger than a certain size.
- the particle size control method is not particularly limited, but a resin particle material having a necessary particle size distribution can be obtained by a method of finely cutting the resin material by physical action such as grinding or classification, or by emulsion polymerization or suspension polymerization from the beginning.
- a resin material can be manufactured so as to have a required particle size distribution.
- the resin particle material preferably has a higher sphericity.
- the sphericity of the composite particle material of the present embodiment is 0.8 or more, more preferably 0.85 or more and 0.9 or more. A higher sphericity is more preferable.
- the resin material is adjusted to an appropriate particle size distribution and then introduced into a high temperature atmosphere.
- the introduction into the high temperature atmosphere can be performed by a method similar to the method in which the resin particle material used in the fusing step in the production method described later is introduced into the high temperature atmosphere.
- the sphericity can be improved by selecting conditions under which the resin particle material is sufficiently melted in the fusing step described later.
- the inorganic particle material is fused to the surface of the resin particle material.
- the step of fusing is performed by treating at a high temperature under conditions where the inorganic particle material is present on the surface of the resin particle material.
- OH groups are generated on the surface of the inorganic particle material by the high temperature treatment.
- An example of the amount of OH groups present on the surface is 0.1-30 ⁇ mol / m 2 .
- the lower limit of the amount of OH groups, 0.1 ⁇ mol / m 2, 0.5 ⁇ mol / m 2, can be exemplified 1 [mu] mol / m 2, the upper limit value, 30 ⁇ mol / m 2, 25 ⁇ mol / m 2, 20 ⁇ mol / m 2 is It can be illustrated. These upper limit value and lower limit value can be arbitrarily combined, and adhesion within the range is improved.
- the treatment temperature in the fusing step is a temperature at which at least a part of the surface of the resin particle material can be melted.
- the temperature is equal to or higher than the softening point of the resin material constituting the resin particle material, and further equal to or higher than the melting point.
- a temperature at which OH groups are generated on the surface of the inorganic particle material is adopted.
- the temperature is preferably 400 ° C. or higher, and when alumina is employed, the temperature is preferably 400 ° C. or higher.
- Fusing means a state in which a part of the surface of the resin particle material is deformed following the outer shape of the inorganic particle material.
- a predetermined value 1 mg / m 2 , 3 mg / m 2 , 5 mg / m 2 , 10 mg / m 2 , 50 mg / m 2 and the like can be set, and it is preferable that the predetermined value is particularly large.
- the sea-island structure under the above-described conditions is not observed even after the washing operation in the inorganic particle content measuring method described later is performed three times (in this case, it is determined that redispersion is possible).
- the inorganic particle material has a smaller particle size than the resin particle material.
- an inorganic substance which comprises an inorganic particle material Inorganic oxides, such as a silica, an alumina, a zirconia, a titania, and these complex oxides can be illustrated.
- the inorganic particle material may contain an organic substance. Examples thereof include aqueous solutions such as silicone oil, aqueous silicic acid, tetraethyl orthosilicate, and particles such as silicone resin.
- the inorganic particle material has a particle size smaller than that of the resin particle material.
- the method of controlling the particle size of the inorganic particle material is not particularly limited, but the desired particle size distribution is obtained by combining mechanical methods such as pulverization and classification, or the inorganic material constituting the inorganic particle material is sol-gel method, hydrothermal method, etc.
- the target particle size distribution can be obtained by a method in which the inorganic substance after the synthesis of is made into particles.
- the preferred particle size of the inorganic particle material is 1/10 to 1/10000, more preferably 1/50 to 1/5000, based on the particle size of the resin particle material.
- the lower limit of the particle size includes 1 nm, 3 nm, 5 nm, 10 nm, 15 nm, 20 nm, 30 nm, 50 nm, 80 nm, and 100 nm
- the upper limit is 1 ⁇ m, 800 nm, 500 nm, 300 nm, 200nm, 150nm, 100nm etc. are mentioned.
- the inorganic particle material may be surface-treated with a silane compound having a Si—H bond. Further, the surface treatment may be performed after making the composite particle material.
- the silane compound include a silane coupling agent, silazanes, and silicone (having an organopolysiloxane structure in the molecule).
- a silane coupling agent such as silazanes, and silicone (having an organopolysiloxane structure in the molecule).
- silane compound a compound having a phenyl group, a vinyl group, an epoxy group, a methacryl group, an amino group, a phenylamino group, a ureido group, a mercapto group, an isocyanate group, an acrylic group, a fluorine alkyl group, or an alkyl group is preferable.
- examples of the silazanes include 1,1,1,3,3,3-hexamethyldisilazane.
- surface treatment may be performed with titanates or aluminates. The surface treatment is performed for the purpose of improving the affinity with the above-mentioned resin particle material or for the purpose of improving the affinity with the target material (resin material, solvent, etc.) in which the composite particle material of the present embodiment is used. You can.
- the surface treatment with the silane compound is preferably performed so that all the OH groups present on the surface of the inorganic particle material can react, but the OH groups may remain.
- the manufacturing method of the composite particle material of this embodiment is a manufacturing method which can manufacture suitably the composite particle material of this embodiment mentioned above.
- the manufacturing method of the composite particle material of this embodiment has a fusion
- the fusion process is a process in which the inorganic particle material adhered to the surface is softened and the resin particle material is fused to the resin particle material.
- the temperature at which the resin particle material becomes soft has a melting point, but a glass transition point and a softening point which are temperatures below the melting point can also be employed.
- the inorganic particle material and the resin particle material are put in a high temperature atmosphere that is above these temperatures. Specific preferred temperatures are as described above.
- High temperature atmosphere is formed by gas. Although it does not specifically limit as gas which can be employ
- As the inorganic particle material and the resin particle material those similar to those that can be used in the composite particle material of the present embodiment described above can be adopted, and further description is omitted.
- the inorganic particle material and the resin particle material may be mixed in advance and charged simultaneously or separately.
- a mechanochemical method such as a compounding device or a pulverizing device before the fusion process
- the resin particle material and the inorganic particle material in the subsequent fusion process Can be strengthened. If the inorganic particle material is embedded in the surface of the resin particle material by a mechanochemical method, the resin particle material may be distorted, but when heated to a temperature at which the resin material softens in the fusing process. The generated distortion is eliminated.
- the gas air, oxygen, nitrogen, argon, etc.
- the heating method is not particularly limited, and a flame or an electric method can be used.
- a flame generated by burning flammable gas such as propane, city gas, and acetylene may be used as a heat source for the heating method.
- a mist sprayed with an organic solvent such as ethanol, octane, kerosene, or a flame generated by burning vaporized vapor may be used.
- Heating can be performed by direct contact with the flame formed in this manner, and heating can be performed indirectly using high-temperature air obtained by heating air or the like with a flame.
- the combustion apparatus include a premix burner, a diffusion combustion type burner, and a liquid fuel burner.
- a device such as a nano creator FCM (manufactured by Hosokawa Micron), a high-frequency induction thermal plasma nanoparticle synthesizer TP-40020NPS (manufactured by JEOL) or the like may be used.
- Airflow dryer HIRAIWA turbojet dryer Hiraiwa Iron Works
- continuous instantaneous airflow dryer flash jet dryer manufactured by Seishin Enterprise
- Meteor Inbo manufactured by Nippon Pneumatic Industry
- High temperature drying micro mist spray dryer (Fujisaki) Gases warmed using an electric heater such as an electric heater as a heat source may be used.
- the inorganic particle material and the resin particle material are charged in a high-temperature atmosphere, it is desirable that they are charged in a disjointed state so that the individual particles constituting each other are not fused together.
- a method of throwing particles apart a method of floating in a medium made of gas or liquid is adopted. A mixture of gas and liquid may be used. Adopting a liquid as the medium can suppress the aggregation of particles that occur before charging, and thus can effectively prevent fusion between the resin particle materials.
- “Injecting the inorganic particle material and the resin particle material into a high-temperature atmosphere” means preparing the high-temperature atmosphere and placing the inorganic particle material and the resin particle material in it, as well as the inorganic particle material and the resin. It can also be realized by forming a high-temperature atmosphere by raising the temperature of the medium after the particulate material is suspended in the medium (for example, a state in which a fluidized bed is formed).
- the resin particle material and the inorganic particle material are exposed to a high temperature atmosphere until the inorganic particle material is fused to the surface of the resin particle material and until OH groups are generated on the surface of the inorganic particle material. Is called. Whether or not the surface of the contained resin particle material has been softened can be determined whether or not it has been fused. Furthermore, when the composite particle material in the slurry state is observed by the method described above, the sea-island structure is not observed. It can be judged by becoming. When the temperature of the high temperature atmosphere is higher than the melting point of the resin material constituting the resin particle material, it is determined that the inorganic particle material is fused to the surface of the resin particle material.
- the time for exposure to a high-temperature atmosphere in the fusing step can be set so that the value of the inorganic particle content measured by the method described later for the manufactured composite particle material is a predetermined value or more.
- the predetermined value 1 mg / m 2 , 3 mg / m 2 , 5 mg / m 2 , 10 mg / m 2 , 50 mg / m 2 and the like can be set, and it is preferable that the predetermined value is particularly large.
- the amount of OH groups generated in the fusion process is not particularly limited, but it is desirable that the amount be in the range of 0.1-30 ⁇ mol / m 2 based on the surface area of the inorganic particle material. Further, the above-mentioned values can be adopted as the upper limit value and the lower limit value of the preferable amount of OH groups, and they can be arbitrarily combined.
- the time for bringing the resin particle material and the inorganic particle material into contact with each other in a high temperature atmosphere can be longer than the time during which the resin particle material is heated and spheroidized.
- the heating time is lengthened, the resin particle material is heated and softened / melted, and the softened / molten resin particle material can be spheroidized by surface tension or the like.
- the sphericity of the composite particle material produced by the production method of the present embodiment is 0.8 or more, more preferably 0.85 or more and 0.9 or more. A higher sphericity is more preferable.
- the newly developed composite particle material can be used as a pellet raw material for compression molding after melt-kneading using a kneader such as a kneader.
- the inorganic particle content is calculated by the following method.
- the composite particle material was mixed with 100 g of methyl ethyl ketone in 200 mL, irradiated with ultrasonic waves (40 kHz, 600 W) for 5 minutes, then centrifuged at 10,000 rpm for 5 minutes, and the supernatant was collected three times, and then the supernatant was collected. The collected liquid was dried. Most of the residual after drying is an inorganic particle material, which is considered to be detached from the surface of the composite particle material by the washing operation described above.
- the inorganic particle content is calculated by the following formula, assuming that the added inorganic particle material is all fixed or physically adsorbed to the resin particle material.
- drying is performed at 180 ° C. for 1 hour.
- the specific surface area is measured by the BET method using nitrogen.
- the composite particle material of the present embodiment preferably has a hydrophobization degree of 20 or more, more preferably 30 or more, and still more preferably 40 or more.
- Example 1 100 parts by mass of polytetrafluoroethylene particles (volume average particle size 3.0 ⁇ m) having a linseed oil supply amount of 22 g / 100 g as resin particle materials, wet silica particles (silica synthesized by liquid phase synthesis method) as inorganic particle materials : Dispersible to primary particles in dry state: Volume average particle size 10 nm, Hydrophobization degree: 72) 3 kg of the mixture is supplied to an air flow of 0.06 m 3 / min in an amount of 1.0 kg / hr. The suspension was put in a high-temperature atmosphere (volume: 2 m 3 ) composed of 500 ° C. air. Of the charged mixture, 90 parts by mass of the composite particulate material could be recovered.
- a high-temperature atmosphere volume: 2 m 3
- the obtained test sample had a linseed oil feed amount of 20 g / 100 g, a sphericity of 0.96, and a silica particle content of 15 mg / m 2 .
- a slurry dispersion was prepared so that the test sample was 60% by mass with respect to methyl ethyl ketone (MEK).
- MEK methyl ethyl ketone
- FIG. 7 shows the result of cutting with a microtome and TEM observation. As a result, it was confirmed that silica was uniformly and firmly bonded to the outermost surface of the PTFE spherical particles.
- grains in FIG. 7 is a part derived from the resin particle material, and the inorganic particle material forms a layer in a dense and close contact state around it.
- Example 2 A test sample of this example was manufactured under the same conditions as in Example 1 except that the wet silica particles were changed to 1 part by mass.
- Example 3 A test sample of this example was manufactured under the same conditions as in Example 1 except that the wet silica particles were changed to 0.3 parts by mass.
- Example 4 A mixture of 100 parts by mass of polytetrafluoroethylene particles (volume average particle size 17 ⁇ m) as a resin particle material and 0.6 parts by mass of wet silica particles as an inorganic particle material is treated under the same conditions as in Example 1 and this embodiment is carried out.
- Example test samples were prepared.
- Example 5 A mixture of 100 parts by mass of polytetrafluoroethylene particles (volume average particle size 0.5 ⁇ m) as the resin particle material and 10 parts by mass of wet silica particles as the inorganic particle material was treated under the same conditions as in Example 1 Example test samples were prepared.
- Example 6 A test sample of this example was manufactured under the same conditions as in Example 1 except that the wet silica particles were changed to 6 parts by mass.
- Example 7 A mixture of 100 parts by mass of polytetrafluoroethylene particles (volume average particle size 50 ⁇ m) as a resin particle material and 0.3 parts by mass of wet silica particles as an inorganic particle material was treated under the same conditions as in Example 1.
- Example test samples were prepared.
- Example 8 A mixture of 100 parts by mass of polytetrafluoroethylene particles (volume average particle size 100 ⁇ m) as the resin particle material and 0.1 parts by mass of wet silica particles as the inorganic particle material was treated under the same conditions as in Example 1 Example test samples were prepared.
- Example 9 A test sample of this example was produced under the same conditions as in Example 5 except that the dry silica particles (silica synthesized by a gas phase synthesis method, hydrophobicity 47) were used.
- Example 10 A test sample of this example was produced under the same conditions as in Example 1 except that the silica particles were changed to dry silica particles.
- Example 11 A test sample of this example was manufactured under the same conditions as in Example 4 except that the silica particles were changed to dry silica particles.
- Example 12 A test sample of this example was produced under the same conditions as in Example 7 except that the silica particles were changed to dry silica particles.
- Example 13 A test sample of this example was manufactured under the same conditions as in Example 8 except that the silica particles were changed to dry silica particles.
- Example 14 A mixture of 100 parts by mass of polytetrafluoroethylene particles (volume average particle size of 3.0 ⁇ m) as the resin particle material and 3 parts by mass of wet silica particles as the inorganic particle material was processed using a composite facility.
- the compounding equipment is a technique for surface-modifying and compounding the surface of a resin particle material with an inorganic particle material in a dry manner using a force mainly composed of an impact force while dispersing the mixture in a high-speed air stream.
- test sample of this example was manufactured under the same conditions as in Example 1. That is, the inorganic particle material was mechanically bonded to the surface of the resin particle material before the fusing step.
- Example 15 A test sample of this example was produced under the same conditions as in Example 1 except that the wet silica particles having a particle diameter of 50 nm (hydrophobicity: 41) were changed.
- Example 16 A test sample of this example was manufactured under the same conditions as in Example 1 except that the wet silica particles having a particle diameter of 100 nm (hydrophobicity: 41) were used.
- Comparative example 1 A test sample of this comparative example was produced under the same conditions as in Example 1 except that the wet silica particles were not used and only the resin particle material was used.
- Comparative example 2 This comparative example was prepared by treating a mixture of 100 parts by mass of polytetrafluoroethylene particles (volume average particle size of 3.0 ⁇ m) as a resin particle material and 3 parts by mass of wet silica particles as an inorganic particle material using a composite facility. The test sample was manufactured. A slurry dispersion was prepared so that the obtained recovered product was 60% by mass with respect to MEK.
- Comparative example 3 A slurry dispersion was prepared so that polytetrafluoroethylene particles (volume average particle size: 3.0 ⁇ m) as the resin particle material were directly 60 mass% with respect to MEK.
- the viscosity of the slurry dispersion was measured using a vibration viscometer, it was 1000 mPa ⁇ s or more. As a result of measurement at 40% by mass, it was 506 mPa ⁇ s.
- Table 1 shows the particle size, mixing ratio, viscosity of the slurry dispersion (measured at 60%, measured at 40% when exceeding the measurement range), and presence or absence of sea island structure for the test samples of Examples 1 to 16 and Comparative Examples 1 to 3. Shown in The presence or absence of a sea-island structure was judged by observing a slurry dispersed in methyl ethyl ketone at a concentration of 60% by mass with an optical microscope (500 times, visual field range 600 ⁇ m ⁇ 600 ⁇ m).
- Example 1 (FIG. 1) and Comparative Example 2 (FIG. 2) are shown as examples of determining the sea-island structure.
- Example 1 FIG.
- Example 1 the composite particle material is uniformly dispersed, whereas in Comparative Example 2 (FIG. 2), the density of the agglomerated island parts and the composite particle material is low or absent. It was found that a sea-island structure separated from the sea part was formed. Also, 100 g of the composite particle material of Example 1 was dispersed in 200 mL of methyl ethyl ketone, irradiated with ultrasonic waves (40 kHz, 600 W) for 5 minutes, then centrifuged at 10,000 rpm for 5 minutes, and the supernatant was discarded. After repeating the above three times, a methyl ethyl ketone slurry of the washed product was prepared, and redispersion was possible.
- Ultrasonic waves 40 kHz, 600 W
- the slurry of the washed product dispersed in methyl ethyl ketone at a concentration of 60% by mass was observed with an optical microscope.
- the image (FIG. 3) is shown.
- the sea-island structure was not formed as before the washing operation.
- the washed product was applied to an IR spectrum measuring apparatus, and an IR spectrum in a wave number range of 4000 to 400 cm ⁇ 1 was measured.
- the result (FIG. 4) is shown.
- the peaks appearing in the ranges of 3000 to 2800 cm ⁇ 1 and 3800 to 3600 cm ⁇ 1 were silica-derived peaks.
- the silica particles are present on the polytetrafluoroethylene particles even when the cleaning operation is performed, and it is clear that the bonding between them is very strong. Became.
- Examples 1, 2, and 4 to 16 which are composite particle materials made of resin particle materials fused with inorganic particle materials on the surface, do not show a sea-island structure and 60% of composite materials It has been found that the viscosity of the slurry dispersion containing the particulate material can be reduced.
- Example 3 a sea-island structure was observed, but Comparative Example 1 in which the fusion process was performed without the inorganic particle material (the surface of the resin particle material was solidified after being melted once), and the inorganic particle material was carried out
- the viscosity of the slurry is higher than that of Comparative Example 2 which contains more than Example 3 and is mechanically fixed but does not perform the fusing process, and Comparative Example 3 which does not contain the inorganic particle material and does not perform the fusing process. It turns out that it is decreasing.
- Example 17 A surface treatment was performed by adding 0.02 parts by mass of a silane coupling agent (vinyltrimethoxysilane) to 100 parts by mass of the powder of the composite particle material obtained in Example 1.
- the powder was washed with a treatment agent not chemically bonded with methyl ethyl ketone (MEK), and then dried to remove MEK, and 100 parts by mass of the washed powder was recovered.
- MEK methyl ethyl ketone
- Example 18 A test sample of this example was manufactured under the same conditions as in Example 17 except that the silane coupling agent was changed to 0.1 parts by mass.
- Example 19 A test sample of this example was manufactured under the same conditions as in Example 17 except that the silane coupling agent was changed to 0.2 parts by mass.
- Example 20 A test sample of this example was manufactured under the same conditions as in Example 17 except that the silane coupling agent was changed to 0.4 parts by mass.
- Example 21 A test sample of this example was produced under the same conditions as in Example 19 except that the silane coupling agent was changed to N-phenyl-3-aminopropyltrimethoxysilane.
- Example 22 A test sample of this example was produced under the same conditions as in Example 19 except that the silane coupling agent was changed to n-heptylamine, and the results of the IR spectrum are shown in FIG.
- the surface of the composite particle material is treated with a silane compound such as a silane coupling agent. It is assumed that a silane compound can be bonded to the surface of the particulate material.
- FIG. 9 shows the results of IR spectrum measurement of the powders produced in Examples 17-20. The end point was 0.2 parts by mass from the peak in the vicinity of 2800 to 3100 cm ⁇ 1 .
- the surface OH group amount was calculated by the following formula.
- the surface OH amount in this specification is a value measured by this method.
- Surface OH group amount ( ⁇ mol / m 2 ) Addition amount of silane coupling agent to the composite particle material (mol / g) / Specific surface area of composite particle material (m 2 / g) ⁇ 1000000
- Example 17 From the results of Examples 17 to 20, the surface OH group amount of the composite particle material recovered in Example 1 was 5.2 ⁇ mol / m 2 . In the same manner, the surface OH group content of the composite particle material recovered in Example 15 was 19.3 ⁇ mol / m 2 . The surface OH group content of the sample collected in Comparative Example 2 was 0.08 ⁇ mol / m 2 . From a comparison between Example 1 and Comparative Example 2, it was found that an OH group was generated on the surface of the inorganic particle material by performing the fusing step in the presence of the inorganic particle material.
- the viscosity of the resin composition was reduced by performing a surface treatment on the composite particle material.
- Example 1 Example 1
- Comparative Example 1 Comparative Example 1
- Comparative Example 3 Comparative Example 3
- the composite particle material of this example has a shape close to a true sphere (sphericity 0.96), and the inorganic particle material is uniformly dispersed and bonded to the surface.
- sphericity 0.96 the inorganic particle material is uniformly dispersed and bonded to the surface.
- Comparative Example 3 which is the resin particle material itself before being subjected to the fusion process, as shown in FIG. 4, it was an irregular shape (sphericity 0.67), but after the fusion process. Was found to have improved sphericity. This can be presumed that the sphericity is improved by softening the resin particle material by heating in the fusion process. This is also supported by the fact that the sphericity was as high as 0.96 in the result of Comparative Example 1 (FIG. 4) in which the resin particle material itself in Example 1 was subjected to the fusing process alone.
- the molding pressure was about 2 MPa
- the molding temperature was raised from 50 ° C. to 170 ° C. at a rate of temperature rise of 5 ° C./min, and after the temperature rise was held at 170 ° C. for 20 minutes. .
- Peel strength measurement The peel strength of this resin-coated copper foil was measured in accordance with JIS K 6854-1 under the conditions shown in Table 2.
- a universal material testing machine 5582 type was used as a measuring device, the test temperature was 23 ° C., the test speed was 50 mm / min, and the peeling width was 10 mm.
- the results are shown in Table 3. It was found that the peel strength of the test sample using Example 1 in which silica was fused was higher than that of the test sample using Comparative Example 2 in which silica was embedded mechanochemically.
- the adhesion between silica and PTFE is improved, and OH groups are generated on the surface, so the adhesion between PTFE and silica and the adhesion between inorganic particles and copper foil are improved. it is conceivable that.
- the composite particle material of Example 1 has a lower relative dielectric constant than the composite particle materials of Comparative Examples 1 to 3, and therefore the surface is coated with an inorganic particle material. It was found that the relative permittivity can be lowered by achieving both the fusing process.
- Example 1 and Comparative Example 1 that does not have a corresponding fusing process (same as Example 1 except that the fusing process is not performed) and Comparative Example 3 (Comparative Example 1 except that the fusing process is not performed) Comparison with (substantially the same) reveals the effect of suppressing the increase in dielectric loss tangent by having the fusion process.
- Example 1 and Comparative Example 1 in which the fusion process is performed is smaller than the corresponding Comparative Examples 2 and 3, respectively, the increase in dielectric loss tangent due to the mixing of the inorganic particle material is fused. It has been found that the landing process is effectively suppressed.
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Abstract
Description
本実施形態の複合粒子材料の製造方法は、上述する本実施形態の複合粒子材料を好適に製造することができる製造方法である。本実施形態の複合粒子材料の製造方法は、融着工程とその他必要に応じて採用される工程とを有する。
複合粒子材料の真球度の算出は、走査型電子顕微鏡(SEM)により観察された画像をコンピュータ上で画像解析ソフト(「ImageJ」、(アメリカ国立衛生研究所(National Institutes of Health,USA))を使用して行った。真球度は、各複合粒子材料がSEM上で100個程度観察されるよう写真を撮り、その観察される粒子の面積と周囲長から、(真球度)={4π×(面積)÷(周囲長)2}で算出される値として算出する。1に近づくほど真球に近い。その粒子すべてについて真球度を算出し、その平均値を採用する。
固着量[g]=添加量[g] - 乾燥後の残差(物理吸着量)[g]
無機物粒子含有量[mg/m2]=固着量[g] / {(洗浄後の比表面積[m2/g]×100[g])}
本実施形態の複合粒子材料の疎水化度は20以上であることが好ましく、30以上であることがより好ましく、40以上であることが更に好ましい。
(疎水化度:%)=100×(メタノール滴下量(mL))÷(50mL+メタノール滴下量(mL))
樹脂粒子材料として亜麻仁油給油量が22g/100gのポリテトラフルオロエチレン粒子(体積平均粒径3.0μm)を100質量部、無機物粒子材料としての湿式シリカ粒子(液相合成法により合成されたシリカ:乾燥状態で一次粒子にまで分散可能:体積平均粒径10nm、疎水化度:72)3質量部の混合物を0.06m3/分の空気の流れに1.0kg/時の量を供給し浮遊状態として、500℃の空気からなる高温雰囲気下(容積2m3)に投入した。投入した混合物の内、90質量部の複合粒子材料が回収できた。混合物と複合粒子材料のIRスペクトルを比較すると、2800-3200cm-1付近にみられるアルキル鎖のピークが減少し、3600-3800cm-1付近にみられるOH基のピークが増加した。回収した複合粒子材料を本実施例の試験試料とした。
湿式シリカ粒子を1質量部に変更したこと以外は実施例1と同様の条件で本実施例の試験試料を製造した。
湿式シリカ粒子を0.3質量部に変更したこと以外は実施例1と同様の条件で本実施例の試験試料を製造した。
樹脂粒子材料としてのポリテトラフルオロエチレン粒子(体積平均粒径17μm)を100質量部、無機物粒子材料としての湿式シリカ粒子0.6質量部の混合物を実施例1と同様の条件で処理し本実施例の試験試料を製造した。
樹脂粒子材料としてのポリテトラフルオロエチレン粒子(体積平均粒径0.5μm)を100質量部、無機物粒子材料としての湿式シリカ粒子10質量部の混合物を実施例1と同様の条件で処理し本実施例の試験試料を製造した。
湿式シリカ粒子を6質量部に変更したこと以外は実施例1と同様の条件で本実施例の試験試料を製造した。
樹脂粒子材料としてのポリテトラフルオロエチレン粒子(体積平均粒径50μm)を100質量部、無機物粒子材料としての湿式シリカ粒子0.3質量部の混合物を実施例1と同様の条件で処理し本実施例の試験試料を製造した。
樹脂粒子材料としてのポリテトラフルオロエチレン粒子(体積平均粒径100μm)を100質量部、無機物粒子材料としての湿式シリカ粒子0.1質量部の混合物を実施例1と同様の条件で処理し本実施例の試験試料を製造した。
乾式シリカ粒子(気相合成法により合成されたシリカ、疎水化度47)に変更したこと以外は実施例5と同様の条件で本実施例の試験試料を製造した。
乾式シリカ粒子に変更したこと以外は実施例1と同様の条件で本実施例の試験試料を製造した。
乾式シリカ粒子に変更したこと以外は実施例4と同様の条件で本実施例の試験試料を製造した。
乾式シリカ粒子に変更したこと以外は実施例7と同様の条件で本実施例の試験試料を製造した。
乾式シリカ粒子に変更したこと以外は実施例8と同様の条件で本実施例の試験試料を製造した。
樹脂粒子材料としてのポリテトラフルオロエチレン粒子(体積平均粒径3.0μm)を100質量部、無機物粒子材料としての湿式シリカ粒子3質量部の混合物を複合化設備を用いて処理した。複合化設備は、高速気流中に混合物を分散させながら、衝撃力を主体とした力を用いて乾式で樹脂粒子材料の表面を無機物粒子材料で表面改質・複合化する技術である。
粒子径が50nmの湿式シリカ粒子(疎水化度:41)に変更したこと以外は実施例1と同様の条件で本実施例の試験試料を製造した。
粒子径が100nmの湿式シリカ粒子(疎水化度:41)に変更したこと以外は実施例1と同様の条件で本実施例の試験試料を製造した。
湿式シリカ粒子を用いず樹脂粒子材料だけとした以外は実施例1と同様の条件で製造し本比較例の試験試料を製造した。
樹脂粒子材料としてのポリテトラフルオロエチレン粒子(体積平均粒径3.0μm)を100質量部、無機物粒子材料としての湿式シリカ粒子3質量部の混合物を複合化設備を用いて処理し、本比較例の試験試料を製造した。得られた回収物をMEKに対して60質量%になるようスラリー分散液を作製した。
樹脂粒子材料としてのポリテトラフルオロエチレン粒子(体積平均粒径3.0μm)をそのままMEKに対して60質量%になるようスラリー分散液を作製した。スラリー分散液の粘度を振動式粘度計を用いて測定したところ1000mPa・s以上となった。40質量%で測定した結果、506mPa・sとなった。
実施例1で得られた複合粒子材料の粉末100質量部にシランカップリング剤(ビニルトリメトキシシラン)を0.02質量部添加し表面処理を行った。その粉末をメチルエチルケトン(MEK)で化学的に結合していない処理剤を洗浄したのち、乾燥してMEKを除去し、洗浄粉末を100質量部回収した。その洗浄粉末のIRスペクトルを測定した。
シランカップリング剤を0.1質量部に変更したこと以外は実施例17と同様の条件で本実施例の試験試料を製造した。
シランカップリング剤を0.2質量部に変更したこと以外は実施例17と同様の条件で本実施例の試験試料を製造した。
シランカップリング剤を0.4質量部に変更したこと以外は実施例17と同様の条件で本実施例の試験試料を製造した。
シランカップリング剤をN-フェニル-3-アミノプロピルトリメトキシシランに変更したこと以外は実施例19と同様の条件で本実施例の試験試料を製造した。
シランカップリング剤をn-ヘプチルアミンに変更したこと以外は実施例19と同様の条件で本実施例の試験試料を製造し、そのIRスぺクトルの結果を図8に示す。
実施例17~20で作製した粉末のIRスペクトルを測定した結果を図9に示す。2800~3100cm-1付近のピークから0.2質量部を終点とした。
表面OH基量(μmol/m2)=複合粒子材料に対するシランカップリング剤添加量(mol/g)/複合粒子材料の比表面積(m2/g)×1000000
エポキシ樹脂(ビスフェノールA型エポキシ樹脂とビスフェノールF型エポキシ樹脂の混合エポキシ樹脂、新日鐵化学社製、ZX-1059)30質量部中に複合粒子材料70質量部を添加した複合粒子材料含有樹脂組成物の1/s時の粘度を測定し、その結果を表2に示す。具体的にはDiscovery Hybrid Rheometer(ティー・エイ・インスツルメント・ジャパン社製)で測定した。
実施例1、比較例1及び2の試験試料についてSEMにより観察した。結果を図5(a、b:実施例1)、図6(a、b:比較例1;c、d:比較例3)に示す。
実施例1及び比較例1それぞれの複合粒子材料64質量部をエチルメチルケトン(MEK)150質量部に湿式混合し、分散液214質量部を得た。この分散液214質量部に、MEK150質量部、クレゾールノボラック型エポキシ樹脂(新日鉄住金化学株式会社製:YDCN-704)100質量部、フェノールノボラック型樹脂(群栄化学工業株式会社製:PSM-4261)50質量部、イミダゾール系硬化促進剤(四国化成工業株式会社製:キュアゾール2E4MZ)0.1質量部を加え混合し本評価試験の試験試料としてのワニス514質量部を得た。
得られたワニスをガラスクロスに含浸させ、自然乾燥したのち、130℃の熱風循環オーブンで10分間、さらに150℃で3分加熱し半硬化させたプリプレグを得た。このプリプレグを8枚重ね合わせて、さらにそれらを銅箔二枚で挟み真空プレスを表2に示す条件で実施した。
この樹脂付銅箔を90°引きはがし強さを表2に示す条件で、JIS K 6854-1に準拠し測定を行った。測定装置として万能材料試験機5582型を用い、試験温度が23℃、試験速度が50mm/分、引きはがし幅が10mmで行った。その結果を表3に示す。シリカを融着させた実施例1を用いた試験試料ではメカノケミカル的にシリカを埋め込んだ比較例2を用いた試験試料に比べピール強度が高くなることが分かった。融着工程を行うことで、シリカとPTFEとの密着性が向上し且つ表面にOH基が生じるためPTFEとシリカ間の密着性や無機物粒子材料及び銅箔との密着性が向上したことによるものと考えられる。
実施例1、比較例1~3のそれぞれの複合粒子材料をネットワークアナライザー(キーサイト社製、E5071C)と空洞共振器摂動法を用いて、1GHzにおける比誘電率、誘電正接を測定した。この測定はASTMD2520(JIS C2565)に準拠して行った。結果を表4に示す。
Claims (14)
- 樹脂粒子材料と、
前記樹脂粒子材料より粒径が小さく前記樹脂粒子材料の表面に融着する無機物粒子材料と、
を有する複合粒子材料であって、以下の(a)、(b)、(c)の条件を満たす複合粒子材料。
(a)真球度が0.8以上、
(b)体積平均粒径が0.1-100μm、
(c)前記無機物粒子材料は無機酸化物から形成され表面に融着により生成したOH基を有する。 - 前記無機物粒子材料表面のOH基量が0.1-30μmol/m2である請求項1に記載の複合粒子材料。
- 前記複合粒子材料をシラン化合物、オルガノシラザン、アミノ基を有する有機化合物の中から少なくとも一つ以上で処理することを特徴とする請求項2に記載の複合粒子材料。
- メチルエチルケトンに20質量%の濃度で分散させたスラリーを光学顕微鏡で観察したときに海島構造が観察されない請求項1~3の何れか1項に記載の複合粒子材料。
- メチルエチルケトン200mL中に100g混合させ、下記(A)の洗浄操作を3回繰り返した後、無機物粒子含有量が1mg/m2以上であることを特徴とする請求項1~4の何れか1項に記載の複合粒子材料。
(A)超音波(40kHz、600W)を5分間照射した後、10000rpmで5分間遠心分離を行い、沈降物を回収する。 - 上記(A)の洗浄操作を3回繰り返した後、その洗浄物がメチルエチルケトンに再分散可能であることを特徴とする請求項1~5の何れか1項に記載の複合粒子材料。
- 亜麻仁油給油量が30g/100g以下であることを特徴とする請求項1~6の何れか1項に記載の複合粒子材料。
- 請求項1~7の何れか1項に記載の複合粒子材料と、
前記複合粒子材料を分散する有機溶媒とを有する複合粒子材料スラリー。 - 請求項1~7の何れか1項に記載の複合粒子材料と、
前記複合粒子材料を分散する重合前の樹脂材料とを有する複合粒子材料含有樹脂組成物。 - 樹脂粒子材料と無機物粒子材料とを気体及び/又は液体からなる媒体中に浮遊させた状態で前記樹脂粒子材料のガラス転移点又は軟化点以上の気体からなる高温雰囲気下に投入し、前記樹脂粒子材料の表面に前記無機物粒子材料を融着させる融着工程を有し、融着工程によって、前記無機酸化物粒子材料の表面にOH基が生成することを特徴とする複合粒子材料の製造方法。
- 疎水化度が20以上である前記無機酸化物粒子材料を用いた請求項10に記載の複合粒子材料の製造方法。
- 前記無機物粒子材料は式(1):-OSiX1X2X3で表される官能基及び式(2):-OSiY1Y2Y3で表される官能基と、両官能基が表面に結合する無機物粒子である請求項10又は11に記載の複合粒子材料の製造方法。(上記式(1)、(2)中;X1はフェニル基、ビニル基、エポキシ基、メタクリル基、アミノ基、ウレイド基、メルカプト基、イソシアネート基、又はアクリル基であり;X2、X3は-OSiR3及び-OSiY4Y5Y6よりそれぞれ独立して選択され;Y1はRであり;Y2、Y3はR及び-OSiY4Y5Y6よりそれぞれ独立して選択される。Y4はRであり;Y5及びY6は、R及び-OSiR3からそれぞれ独立して選択され;Rは炭素数1~3のアルキル基から独立して選択される。なお、X2、X3、Y2、Y3、Y5、及びY6の何れかは、近接する官能基のX2、X3、Y2、Y3、Y5、及びY6の何れかと-O-にて結合しても良い。)
- 前記融着工程では、得られる前記複合粒子材料の真球度が0.8以上になるまで前記高温雰囲気に前記樹脂粒子材料を接触させる請求項10~12の何れか1項に記載の複合粒子材料の製造方法。
- 前記融着工程は、得られた前記複合粒子材料をメチルエチルケトンに20質量%で分散させたスラリーを光学顕微鏡で観察したときに海島構造が観察されない請求項10~13のうちの何れか1項に記載の複合粒子材料の製造方法。
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