WO2009116527A1 - 高誘電性フィルム形成用のコーティング組成物および高誘電性フィルム - Google Patents
高誘電性フィルム形成用のコーティング組成物および高誘電性フィルム Download PDFInfo
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- WO2009116527A1 WO2009116527A1 PCT/JP2009/055162 JP2009055162W WO2009116527A1 WO 2009116527 A1 WO2009116527 A1 WO 2009116527A1 JP 2009055162 W JP2009055162 W JP 2009055162W WO 2009116527 A1 WO2009116527 A1 WO 2009116527A1
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- high dielectric
- film
- dielectric film
- coating composition
- resin
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
- H01G4/14—Organic dielectrics
- H01G4/18—Organic dielectrics of synthetic material, e.g. derivatives of cellulose
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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
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/185—Substances or derivates of cellulose
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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
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/44—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
- H01B3/443—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from vinylhalogenides or other halogenoethylenic compounds
- H01B3/445—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from vinylhalogenides or other halogenoethylenic compounds from vinylfluorides or other fluoroethylenic compounds
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/06—Solid dielectrics
- H01G4/14—Organic dielectrics
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01G—CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
- H01G4/00—Fixed capacitors; Processes of their manufacture
- H01G4/002—Details
- H01G4/018—Dielectrics
- H01G4/20—Dielectrics using combinations of dielectrics from more than one of groups H01G4/02 - H01G4/06
- H01G4/206—Dielectrics using combinations of dielectrics from more than one of groups H01G4/02 - H01G4/06 inorganic and synthetic material
Definitions
- the present invention relates to a coating composition for forming a high dielectric film suitable for a film capacitor and a high dielectric film.
- PVdF vinylidene fluoride
- Tan ⁇ dielectric loss tangent
- 80 high temperature
- Patent Document 1 describes that by blending PVdF with a polyether such as polyoxymethylene at a certain ratio, the dielectric loss of PVdF can be reduced and the dielectric loss can be made lower than PVdF itself. .
- Patent Document 1 also describes mixing polyvinyl acetate, acrylic resin, and the like with PVdF as a thermoplastic resin composition for molding and coating.
- PVdF mixed composition it is also known to mix a hydrophilic polymer such as cellulose acetate (Patent Document 2), which is a semipermeable membrane for ultrafiltration or a semipermeable membrane for microfiltration. It is a porous membrane used for a membrane.
- a hydrophilic polymer such as cellulose acetate (Patent Document 2), which is a semipermeable membrane for ultrafiltration or a semipermeable membrane for microfiltration. It is a porous membrane used for a membrane.
- the present invention provides a non-porous high dielectric film capable of improving withstand voltage, insulation and dielectric constant, particularly reducing dielectric loss at high temperatures and capable of being thinned, and formation of the high dielectric film It is an object of the present invention to provide a coating composition.
- the present invention (A) vinylidene fluoride resin,
- the present invention relates to a coating composition for forming a high dielectric film containing (B) a cellulose-based resin and (C) a solvent.
- the vinylidene fluoride resin (A) / cellulose resin (B) may have a mass ratio of 0.1 / 99.9 to 99.9 / 0.1. It is preferable for reducing the dielectric loss of vinylidene and for improving the dielectric constant of cellulose.
- the cellulose resin (B) is preferably cellulose acetate or ether-substituted cellulose from the viewpoint of good mechanical properties of the film.
- the vinylidene fluoride resin (A) is a polymer containing 60 to 100 mol% of vinylidene fluoride units, 0 to 40 mol% of tetrafluoroethylene units and 0 to 40 mol% of hexafluoropropylene. Is preferable from the viewpoint of high.
- composition of the present invention may contain rubber particles (D).
- the mechanical strength, particularly elongation, of the resulting film is improved, and properties such as rubber elasticity can be imparted.
- the present invention also relates to a method for producing a non-porous high dielectric film, wherein the coating composition of the present invention is cast on the surface of a non-porous substrate, dried and then peeled off from the substrate. .
- the present invention further includes a vinylidene fluoride resin (A) and a cellulose resin (B), and when (A) + (B) is 100 parts by mass, (A) is 2 to 98 parts by mass. It also relates to porous high dielectric films.
- the rubber particles (D) When the rubber particles (D) are blended, it is preferably contained in an amount of 1 to 30 parts by mass with respect to 100 parts by mass of the vinylidene fluoride resin (A).
- the present invention further relates to a non-porous high dielectric film obtained by the production method of the present invention.
- These non-porous high dielectric films are suitable as films for film capacitors.
- the present invention relates to a film capacitor in which an electrode layer is laminated on at least one surface of the high dielectric film of the present invention.
- a non-porous high-dielectric film suitable for a film capacitor that can improve withstand voltage, insulation, dielectric constant, particularly reduce dielectric loss at high temperatures and can be thinned.
- a coating composition for forming the high dielectric film a coating composition for forming the high dielectric film.
- the coating composition of the present invention contains (A) a vinylidene fluoride (VdF) resin, (B) a cellulose resin, and (C) a solvent.
- VdF vinylidene fluoride
- VdF resin in addition to a VdF homopolymer (PVdF), a copolymer with one or more of other monomers copolymerizable with VdF can be exemplified, and among these, dielectric constant Is preferably 4 or more, more preferably 6 or more, and particularly preferably 7 or more, and particularly preferably 7.5 or more from the viewpoint of improvement in withstand voltage, insulation, and dielectric constant.
- dielectric constant Is preferably 4 or more, more preferably 6 or more, and particularly preferably 7 or more, and particularly preferably 7.5 or more from the viewpoint of improvement in withstand voltage, insulation, and dielectric constant.
- the VdF resin (A) may be a homopolymer of vinylidene fluoride (VdF) (PVdF) or a copolymer with other monomers copolymerizable with VdF. Further, it may be a blend of a VdF homopolymer and a VdF copolymer, or a blend of VdF copolymers.
- VdF examples include tetrafluoroethylene (TFE), chlorotrifluoroethylene (CTFE), trifluoroethylene (TrFE), monofluoroethylene, hexafluoropropylene (HFP), Fluorinated olefins such as fluoro (alkyl vinyl ether) (PAVE); fluorinated acrylates, functional group-containing fluorinated monomers, and the like.
- TFE tetrafluoroethylene
- CTFE chlorotrifluoroethylene
- TrFE trifluoroethylene
- HFP hexafluoropropylene
- Fluorinated olefins such as fluoro (alkyl vinyl ether) (PAVE); fluorinated acrylates, functional group-containing fluorinated monomers, and the like.
- TFE, CTFE, and HFP are preferred from the viewpoint of good solvent solubility.
- VdF is 50 mol% or more, preferably 60 mol% or more from the viewpoint of
- a polymer containing 60 to 100 mol% of VdF units, 0 to 40 mol% of TFE units and 0 to 40 mol% of HFP is preferable because the dielectric constant is 6 or more.
- VdF homopolymer PVdF
- VdF / TFE copolymer VdF / TFE / HFP copolymer
- VdF / HFP copolymer VdF / CTFE copolymer, etc.
- PVdF, VdF / TFE copolymers, and VdF / HFP copolymers are preferred from the viewpoint of high dielectric constant and good solvent solubility.
- the composition ratio is such that the VdF unit is 60 to 95 mol% and the TFE unit is 5 to 40 mol%, particularly the VdF unit is 70 to 90 mol% and the TFE unit is A content of 10 to 30 mol% is preferable from the viewpoint of increasing the withstand voltage.
- the relative dielectric constant (1 kHz, 25 ° C.) of the VdF resin itself is preferably 5 or more, preferably 6 or more, and more preferably 7.5 or more from the viewpoint of further increasing the dielectric constant of the film.
- the upper limit is not particularly limited, but is usually 15 and preferably 13.
- VdF-based resin (A) Cellulose-based resin
- the VdF-based resin (A) is blended to reduce the temperature dependence of the dielectric loss, particularly the temperature dependence at high temperatures.
- cellulose-based resin examples include ester-substituted celluloses such as cellulose monoacetate, cellulose diacetate, cellulose triacetate, and cellulose acetate propionate; and celluloses substituted with ethers such as methylcellulose, ethylcellulose, and hydroxypropylmethylcellulose.
- ester-substituted celluloses such as cellulose monoacetate, cellulose diacetate, cellulose triacetate, and cellulose acetate propionate
- ethers such as methylcellulose, ethylcellulose, and hydroxypropylmethylcellulose.
- (mono, di, tri) cellulose acetate and methyl cellulose are preferable from the viewpoint of low temperature coefficient of dielectric loss.
- the ratio (mass ratio) of the VdF-based resin (A) and the cellulose-based resin (B) is 0.1 / 99.9 or more from the viewpoint of high dielectric constant and low dielectric loss, and 20 from the viewpoint of excellent mechanical characteristics. / 80 or more is preferable.
- (A) / (B) is 99.9 / 0.1 or less from the viewpoint of low dielectric loss, good mechanical properties and high dielectric constant, and 98/2 or less from the point of low temperature dependence of dielectric loss. Is preferred.
- solvent any solvent that dissolves the VdF-based resin (A) and the cellulose-based resin (B) can be used, and a polar organic solvent is particularly preferable.
- polar organic solvent for example, ketone solvents, ester solvents, carbonate solvents, cyclic ether solvents, and amide solvents are preferable.
- the total solid content concentration of the VdF resin (A), the cellulose resin (B), and other optional components is 5 to 30% by mass depending on the solvent (C). It is preferable that the coating operation is easy and the stability of the composition is good.
- the rubber particles (D) have a role of imparting mechanical strength, particularly elongation, to the film and further imparting properties such as rubber elasticity.
- Suitable rubber particles for fulfilling such a role include, but are not limited to, acrylic rubber, butadiene rubber, silicone rubber, silicone acrylic composite rubber, natural rubber, nitrile rubber, urethane rubber, styrene-butadiene rubber, isoprene.
- examples include diene rubbers such as rubber; fluorine rubbers such as VdF-tetrafluoroethylene (TFE) rubber.
- acrylic rubber, butadiene rubber, and silicone rubber are preferred because of their high relative dielectric constant and good dispersibility.
- so-called core-shell rubber particles in which the surfaces of these rubber particles are coated with at least one selected from the group consisting of polymethyl methacrylate and acrylonitrile / styrene copolymer may be used.
- the core-shell rubber particles are used, the compatibility with the vinylidene fluoride resin is excellent.
- the rubber particles may be uncrosslinked rubber (raw rubber) particles or crosslinked rubber particles, but crosslinked rubber particles are preferred from the viewpoint of good solvent resistance.
- the rubber may be crosslinked according to a known method.
- the particle diameter of the rubber particles (D) is about 0.1 to 2.0 ⁇ m in average primary particle diameter, more preferably about 0.15 to 1.5 ⁇ m, and particularly about 0.2 to 1.0 ⁇ m. It is preferable from the viewpoint that both dispersibility and improvement in film strength can be achieved.
- the compounding amount of the rubber particles (D) is 1 part by mass or more, preferably 5 parts by mass or more, and particularly preferably 10 parts by mass or more with respect to 100 parts by mass of the vinylidene fluoride resin (A). If the amount is too small, the effect of improving the mechanical strength, particularly elongation, of the film tends to be small.
- the upper limit is 30 parts by mass. If the amount is too large, the dispersibility in the resin tends to be poor. A preferable upper limit is 20 parts by mass.
- additives such as other reinforcing fillers and affinity improvers may be included as optional components within a range not impairing the effects of the present invention. Good.
- Examples of the reinforcing filler include silica, silicon carbide, silicon nitride, magnesium oxide, potassium titanate, glass, alumina, and boron compound particles or fibers.
- Examples of the affinity improver include functional group-modified polyolefin and styrene. Examples thereof include modified polyolefin, functional group-modified polystyrene, polyacrylimide, cumylphenol, and the like, and may be included within a range not impairing the effects of the present invention. In addition, it is more preferable that these components are not included from the point of withstand voltage.
- high dielectric inorganic particles that are often blended in high dielectric film capacitors can reduce the temperature dependence of dielectric loss, particularly at high temperatures, even if not blended in the present invention. .
- Such high dielectric inorganic particles include strontium titanate, barium titanate, lead zirconate titanate oxide (PZT), barium zirconate titanate, barium zirconate, strontium zirconate, calcium titanate, calcium zirconate. Etc. can be exemplified.
- the coating composition of the present invention can be prepared by dissolving or dispersing these components in a solvent.
- knife coating method, cast coating method, roll coating method, gravure coating method, blade coating method, rod coating method, air doctor coating method, curtain coating method, fakunlan coating method Kiss coating method, screen coating method, spin coating method, spray coating method, extrusion coating method, electrodeposition coating method, etc. can be used, but among these, it is easy to operate, there are few variations in film thickness, production
- the roll coating method, the gravure coating method, the cast coating method, particularly the cast coating method are preferable from the viewpoint of excellent properties, and an excellent film for a film capacitor can be produced.
- the coating composition of the present invention When the coating composition of the present invention is cast on the surface of a non-porous substrate, dried and then peeled off from the substrate, the resulting non-porous high dielectric film has a high withstand voltage and electrical insulation. It is excellent in terms of high points, excellent in that it is thin and flexible, and has a low temperature dependence of dielectric loss.
- the non-porous substrate used for the cast coating is not particularly limited as long as it is a material capable of forming a dense film surface.
- a resin film such as a polyester film, a polycarbonate film, or a polyimide film; an aluminum foil, a copper foil, or the like Metal foil etc. can be illustrated.
- what performed the mold release process is preferable.
- the film thickness should be 20 ⁇ m or less, preferably 10 ⁇ m or less, more preferably 6 ⁇ m or less, and particularly preferably 5 ⁇ m or less. it can.
- the lower limit of the film thickness is preferably about 2 ⁇ m from the viewpoint of maintaining mechanical strength.
- the present invention also includes a VdF-based resin (A) and a cellulose-based resin (B).
- A VdF-based resin
- B cellulose-based resin
- (A) + (B) is 100 parts by mass
- (A) is 2 to 98 parts by mass. Also related to high dielectric films.
- the non-porous high dielectric film produced using the coating composition of the present invention has a VdF resin (A) of 0.1 to 99 when (A) + (B) is 100 parts by mass. .9 parts by mass, preferably 2 to 98 parts by mass.
- This non-porous high dielectric film also has excellent characteristics as described above. Among them, when (A) + (B) is 100 parts by mass, the VdF resin (A) is 2 to 40%.
- the non-porous high dielectric film of 5 parts by mass, more preferably 5 to 30 parts by mass has a dielectric constant lower than that of the VdF resin alone but higher than that of the cellulose resin alone, and the temperature dependence of dielectric loss. The resistance can be greatly reduced, and the withstand voltage is also improved.
- the non-porous high dielectric film in which the VdF resin (A) is 60 to 98 parts by mass, more preferably 70 to 95 parts by mass, The rate has a high dielectric constant derived from the VdF resin, and the temperature dependence of dielectric loss can be reduced, and the withstand voltage is also improved.
- the present invention also relates to a film capacitor in which an electrode layer is laminated on at least one surface of the non-porous high dielectric film of the present invention.
- the structure of the film capacitor for example, a laminated type in which electrode layers and high dielectric films are alternately laminated (Japanese Patent Laid-Open Nos. 63-181411, 3-18113, etc.) or a tape-like high dielectric Winding type in which a body film and an electrode layer are wound (disclosed in Japanese Patent Application Laid-Open No. 60-262414 in which electrodes are not continuously laminated on a high dielectric film, or electrodes on a high dielectric film And the like disclosed in JP-A-3-286514, etc.) are continuously laminated.
- Japanese Patent Application Laid-Open No. 60-262414 in which electrodes are not continuously laminated on a high dielectric film, or electrodes on a high dielectric film And the like disclosed in JP-A-3-286514, etc.
- a wound film capacitor that has a simple structure and is relatively easy to manufacture
- a wound film capacitor in which electrode layers are continuously laminated on a high dielectric film it is generally a high dielectric that has electrodes laminated on one side. Two films are rolled up so that the electrodes do not come into contact with each other. If necessary, the film is rolled and fixed so as not to be loosened.
- the electrode layer is not particularly limited, but is generally a layer made of a conductive metal such as aluminum, zinc, gold, platinum, or copper, and is used as a metal foil or a deposited metal film.
- a metal foil or a vapor-deposited metal film, or both may be used in combination.
- a vapor-deposited metal film is preferable in that the electrode layer can be thinned, and as a result, the capacity can be increased with respect to the volume, the adhesiveness with the dielectric is excellent, and the thickness variation is small.
- the vapor-deposited metal film is not limited to a single layer.
- a method of forming an aluminum oxide layer of a semiconductor on an aluminum layer to form an electrode layer for example, JP-A-2-250306)
- multiple layers may be used as necessary.
- the thickness of the vapor-deposited metal film is not particularly limited, but is preferably in the range of 100 to 2,000 angstrom, more preferably 200 to 1,000 angstrom. When the thickness of the deposited metal film is within this range, the capacity and strength of the capacitor are balanced, which is preferable.
- the method for forming the film is not particularly limited, and for example, a vacuum deposition method, a sputtering method, an ion plating method, or the like can be employed. Usually, a vacuum deposition method is used.
- the semi-continuous metal vapor deposition method is a method in which after vapor deposition and winding of a metal in a vacuum system, the vacuum system is returned to the atmospheric system, and the deposited film is taken out.
- the semi-continuous method can be specifically performed by the method described in Japanese Patent No. 3664342 with reference to FIG.
- the surface of the high dielectric film can be subjected in advance to treatment for improving adhesive properties such as corona treatment or plasma treatment.
- the thickness of the metal foil is not particularly limited, but is usually in the range of 0.1 to 100 ⁇ m, preferably 1 to 50 ⁇ m, more preferably 3 to 15 ⁇ m.
- the fixing method is not particularly limited, and for example, fixing and protecting the structure may be performed simultaneously by sealing with resin or enclosing in an insulating case.
- the connection method of the lead wire is not limited, and examples thereof include welding, ultrasonic pressure welding, heat pressure welding, and fixing with an adhesive tape.
- a lead wire may be connected to the electrode before it is wound.
- the opening may be sealed with a thermosetting resin such as urethane resin or epoxy resin to prevent oxidative degradation.
- the film capacitor of the present invention thus obtained has high dielectric properties, high withstand voltage, and low temperature dependence of dielectric loss.
- a high dielectric film is used as a sample by depositing aluminum on both sides in a vacuum. This sample is measured for impedance and dielectric loss tangent at frequencies of 100 Hz, 1 kHz, 10 kHz, and 100 kHz at room temperature (20 ° C.) and 80 ° C. using an impedance analyzer (HP4194A manufactured by Hewlett-Packard Co., Ltd.). The relative dielectric constant and dielectric loss (%) are calculated from the measured values of the obtained capacitances and dielectric loss tangents.
- the volume resistivity ( ⁇ ) at 20 ° C. is measured with DC100V in a dry air atmosphere with a digital superinsulator / microammeter.
- the tensile strength at break (MPa) is measured using a tensile tester (RTC-1225A manufactured by ORIENTEC Co., Ltd.).
- Example 1 In a 1 L separable flask, 800 parts by mass of dimethylacetamide (DMAc) (manufactured by Kishida Chemical Co., Ltd.) and 200 parts by mass of polyvinylidene fluoride (PVdF) (KAYNAR761 manufactured by ARKEMA) were placed, and a mechanical stirrer at 60 ° C. for 3 hours. To obtain a PVdF solution having a concentration of 20% by mass.
- DMAc dimethylacetamide
- PVdF polyvinylidene fluoride
- DMAc dimethylacetamide
- AC cellulose acetate
- This coating composition was cast on a non-porous polyester (PET) film having a thickness of 38 ⁇ m and subjected to a release treatment using a micro gravure coater (OS-750 manufactured by Yasui Seiki Co., Ltd.).
- a laminated film in which a cast film having a film thickness of 8 ⁇ m was formed on a PET film was obtained by passing through a 6 m drying furnace followed by a 6 m drying furnace at 180 ° C. Subsequently, the highly dielectric film of the present invention having a film thickness of 8.3 ⁇ m was obtained by peeling from the PET film.
- Examples 2-4 A coating composition and a non-porous high dielectric film of the present invention were produced in the same manner as in Example 1 except that the mass ratio of PVdF and cellulose acetate was changed to the ratio shown in Table 1 in Example 1.
- Comparative Example 1 In Example 1, a comparative coating composition and a non-porous high dielectric film were produced in the same manner as in Example 1 except that only PVdF was used without blending cellulose acetate.
- Examples 5-8 A coating composition and a non-porous high dielectric film of the present invention were produced in the same manner as in Example 1 except that the mass ratio of PVdF and cellulose acetate was changed to the ratio shown in Table 2 in Example 1.
- Comparative Example 2 A comparative coating composition and a non-porous high dielectric film were prepared in the same manner as in Example 1 except that in Example 1, only cellulose acetate was used without blending PVdF.
- Example 9 A coating composition and a non-porous high dielectric film of the present invention were produced in the same manner as in Example 2 except that VdF / TFE (80/20 mol%) was used as the VdF resin in Example 2.
- Example 10 In Example 2, a coating composition and a non-porous high dielectric film of the present invention were produced in the same manner as in Example 2 except that VdF / HFP (88/12 mol%) was used as the VdF resin.
- Example 11 the coating composition and non-porous material of the present invention were used in the same manner as in Example 2 except that hydroxypropyl methylcellulose (60SH03 manufactured by Shin-Etsu Chemical Co., Ltd.), which is an ether-substituted cellulose, was used as the cellulose resin. A high dielectric film was prepared.
- hydroxypropyl methylcellulose 60SH03 manufactured by Shin-Etsu Chemical Co., Ltd.
- Examples 12-15 In each of Examples 1 to 4, the coating composition of the present invention and the non-porous coating were similarly obtained except that cellulose acetate having different acetylation degree (L-70 manufactured by Daicel Chemical Industries, Ltd.) was used as cellulose acetate. A dielectric film was prepared.
- Comparative Example 3 A coating composition for comparison and a non-porous high dielectric constant in the same manner as in Example 12, except that only cellulose acetate (L-70 manufactured by Daicel Chemical Industries, Ltd.) was used without blending PVdF. A conductive film was prepared.
- Example 16 Rubber particle No. was further added to the total amount (100 parts by mass) of PVdF and cellulose acetate. 1 (Excluding the addition of 20 parts by mass of rubber particles (EXL2313 manufactured by Rohm and Haas Japan Co., Ltd., average primary particle size 0.6 ⁇ m) whose core is acrylic rubber and whose shell is polymethyl methacrylate)
- the coating composition of the present invention and a non-porous high dielectric film were prepared in the same manner as in Example 3.
- Example 16 instead of rubber particle No. 1, rubber particle No. 1 shown in Table 5 was used. 2 (Example 17) and the example (Example 18) in which the blending amount of the rubber particles N0.1 was changed to 10 parts by mass, was carried out in the same manner as in Example 16 and the coating composition and non-porous material A high-quality dielectric film was produced.
- Rubber particle No. 1 Rubber particles whose core is acrylic rubber and whose shell is polymethyl methacrylate (EXL2313 manufactured by Rohm and Haas Japan Co., Ltd., average primary particle diameter 0.6 ⁇ m)
- Rubber particle No. 2 Rubber particles whose core is butadiene rubber and whose shell is polymethylmethacrylate (KCA801N manufactured by Rohm and Haas Japan Co., Ltd., average primary particle size 0.2 ⁇ m)
- Example 19 Electrodes were formed on both surfaces of the non-porous high dielectric film produced in Example 1 by depositing aluminum with a vacuum deposition apparatus (VE-2030 manufactured by Vacuum Device Co., Ltd.) with a target of 3 ⁇ / ⁇ . A voltage-applying lead wire was attached to these aluminum electrodes to produce stamp-type (for simple evaluation) film capacitors.
- a vacuum deposition apparatus VE-2030 manufactured by Vacuum Device Co., Ltd.
Abstract
Description
(A)フッ化ビニリデン系樹脂、
(B)セルロース系樹脂、および
(C)溶剤
を含む高誘電性フィルム形成用コーティング組成物に関する。
ゴム粒子(D)を配合する場合は、フッ化ビニリデン系樹脂(A)100質量部に対して1~30質量部含まれていることが好ましい。
VdFの単独重合体(PVdF)のほか、VdFと共重合可能な他の単量体の1種または2種以上との共重合体が例示でき、これらのうち、誘電率が4以上、さらには6以上、なかでも7以上、特に7.5以上のものが、耐電圧、絶縁性、誘電率の向上の点から好ましい。
VdF系樹脂(A)の誘電損失の温度依存性、特に高温での温度依存性を低減化するために配合する。
溶剤としては、VdF系樹脂(A)およびセルロース系樹脂(B)を溶解する任意の溶媒を使用できるが、特に、極性有機溶媒が好ましい。なかでも極性有機溶媒としては、たとえばケトン系溶剤、エステル系溶媒、カーボネート系溶媒、環状エーテル系溶媒、アミド系溶剤が好ましい。具体的には、メチルエチルケトン、メチルイソブチルケトン、アセトン、ジエチルケトン、ジプロピルケトン、酢酸エチル、酢酸メチル、酢酸プロピル、酢酸ブチル、乳酸エチル、ジメチルカーボネート、ジエチルカーボネート、ジプロピルカーボネート、メチルエチルカーボネート、テトラヒドロフラン、メチルテトラヒドロフラン、ジオキサン、ジメチルホルムアミド、ジメチルアセトアミドなどが好ましくあげられる。
本発明において、ゴム粒子(D)はフィルムに機械的強度、特に伸びを与え、さらにゴム弾性などの性質を付与する役割をもっている。
本発明のコーティング組成物には、任意成分として、他の補強用フィラーや親和性向上剤などの添加剤を、本発明の効果を損なわない範囲内で含ませてもよい。
デジタル測長機((株)仙台ニコン製のMF-1001)を用いて、基板に載せたフィルムを室温下にて測定する。
高誘電性フィルムを真空中で両面にアルミニウムを蒸着しサンプルとする。このサンプルをインピーダンスアナライザ(ヒューレットパッカード(株)製のHP4194A)にて、室温(20℃)および80℃下で、周波数100Hz、1kHz、10kHzおよび100kHzでの静電容量と誘電正接を測定する。得られた各静電容量と誘電正接の測定値から比誘電率および誘電損失(%)を算出する。
耐電圧・絶縁抵抗試験器(菊水電子工業(株)TOS9201)を用いて、基板に載せたフィルムをドライエアー雰囲気下にて測定する。昇圧速度は100V/sで測定する。
デジタル超絶縁計/微小電流計にて、20℃での体積抵抗率(Ω)をドライエアー雰囲気下、DC100Vで測定する。
引張試験機(ORIENTEC(株)製のRTC-1225A)を用いて、引張破断強度(MPa)を測定する。
引張試験機(ORIENTEC(株)製のRTC-1225A)を用いて、引張破断伸度(%)を測定する。
1Lセパラブルフラスコ中にジメチルアセトアミド(DMAc)(キシダ化学(株)製)800質量部とポリフッ化ビニリデン(PVdF)(ARKEMA社製KAYNAR761)を200質量部入れ、60℃にて3時間、メカニカルスターラーにて攪拌し、20質量%濃度のPVdF溶液を得た。
実施例1において、PVdFと酢酸セルロースとの質量比を表1に示す比率にしたほかは実施例1と同様にして本発明のコーティング組成物および非多孔質高誘電性フィルムを作製した。
実施例1において、酢酸セルロースを配合せずにPVdFのみを使用したほかは実施例1と同様にして比較用のコーティング組成物および非多孔質高誘電性フィルムを作製した。
実施例1において、PVdFと酢酸セルロースとの質量比を表2に示す比率にしたほかは実施例1と同様にして本発明のコーティング組成物および非多孔質高誘電性フィルムを作製した。
実施例1において、PVdFを配合せずに酢酸セルロースのみを使用したほかは実施例1と同様にして比較用のコーティング組成物および非多孔質高誘電性フィルムを作製した。
実施例2において、VdF系樹脂としてVdF/TFE(80/20モル%)を用いたほかは実施例2と同様にして本発明のコーティング組成物および非多孔質高誘電性フィルムを作製した。
実施例2において、VdF系樹脂としてVdF/HFP(88/12モル%)を用いたほかは実施例2と同様にして本発明のコーティング組成物および非多孔質高誘電性フィルムを作製した。
実施例2において、セルロース系樹脂としてエーテル置換セルロースであるヒドロキシプロピルメチルセルロース(信越化学工業(株)製の60SH03)を用いたほかは実施例2と同様にして本発明のコーティング組成物および非多孔質高誘電性フィルムを作製した。
実施例1~4のそれぞれにおいて、酢酸セルロースとしてアセチル化度の異なる酢酸セルロース(ダイセル化学工業(株)製L-70)を用いたほかは同様にして本発明のコーティング組成物および非多孔質高誘電性フィルムを作製した。
実施例12において、PVdFを配合せずに酢酸セルロース(ダイセル化学工業(株)製L―70)のみを使用したほかは実施例12と同様にして比較用のコーティング組成物および非多孔質高誘電性フィルムを作製した。
実施例3において、PVdFと酢酸セルロースの合計量(100質量部)に対し、さらにゴム粒子No.1(コアがアクリルゴムでシェルがポリメタクリル酸メチルであるゴム粒子(ローム・アンド・ハース・ジャパン(株)製のEXL2313。平均1次粒子径0.6μm)を20質量部配合したほかは実施例3と同様にして本発明のコーティング組成物および非多孔質高誘電性フィルムを作製した。
実施例16において、ゴム粒子No.1に代えて表5に示すゴム粒子No.2を用いた例(実施例17)およびゴム粒子N0.1の配合量を10質量部に変更した例(実施例18)について、実施例16と同様にして本発明のコーティング組成物および非多孔質高誘電性フィルムを作製した。
ゴム粒子No.1:
コアがアクリルゴムでシェルがポリメタクリル酸メチルであるゴム粒子(ローム・アンド・ハース・ジャパン(株)製のEXL2313。平均1次粒子径0.6μm)
ゴム粒子No.2:
コアがブタジエンゴムでシェルがポリメタクリル酸メチルであるゴム粒子(ローム・アンド・ハース・ジャパン(株)製のKCA801N。平均1次粒子径0.2μm)
実施例1で製造した非多孔質高誘電性フィルムの両面に、真空蒸着装置((株)真空デバイス製のVE-2030)により3Ω/□を目標にしてアルミニウムを蒸着して電極を形成した。これらのアルミニウム電極に電圧印加用のリード線を取り付け、スタンプ型(簡易評価用)のフィルムコンデンサを作製した。
Claims (11)
- (A)フッ化ビニリデン系樹脂、
(B)セルロース系樹脂、および
(C)溶剤
を含む高誘電性フィルム形成用コーティング組成物。 - 前記フッ化ビニリデン系樹脂(A)/セルロース系樹脂(B)が、質量比で0.1/99.9~99.9/0.1である請求項1記載のコーティング組成物。
- 前記セルロース系樹脂(B)が、酢酸セルロースまたはエーテル置換セルロースである請求項1または2記載のコーティング組成物。
- フッ化ビニリデン系樹脂(A)が、フッ化ビニリデン単位60~100モル%、テトラフルオロエチレン単位0~40モル%およびヘキサフルオロプロピレン0~40モル%を含む重合体である請求項1~3のいずれかに記載のコーティング組成物。
- さらにゴム粒子(D)を含む請求項1~4のいずれかに記載のコーティング組成物。
- 請求項1~5のコーティング組成物を非多孔質基材表面にキャストし、乾燥した後、該基材から剥離することを特徴とする非多孔質高誘電性フィルムの製造方法。
- フッ化ビニリデン系樹脂(A)とセルロース系樹脂(B)を含み、(A)+(B)を100質量部としたとき、(A)が2~98質量部である非多孔質高誘電性フィルム。
- フッ化ビニリデン系樹脂(A)100質量部に対してゴム粒子(D)が1~30質量部含まれている請求項7記載の非多孔質高誘電性フィルム。
- 請求項6記載の製造方法で得られた非多孔質高誘電性フィルム。
- フィルムコンデンサ用である請求項7~9のいずれかに記載の非多孔質高誘電性フィルム。
- 請求項7~10のいずれかに記載の高誘電性フィルムの少なくとも片面に電極層が積層されているフィルムコンデンサ。
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CN2009801098413A CN101978446B (zh) | 2008-03-19 | 2009-03-17 | 高介电性薄膜形成用的涂层组合物和高介电性薄膜 |
US12/933,341 US8576540B2 (en) | 2008-03-19 | 2009-03-17 | Coating composition for forming highly dielectric film and highly dielectric film |
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KR101449356B1 (ko) | 2010-09-22 | 2014-10-08 | 다이킨 고교 가부시키가이샤 | 필름 콘덴서용 필름 및 필름 콘덴서 |
JP2013221151A (ja) * | 2012-04-13 | 2013-10-28 | Xerox Corp | 物質の組成物 |
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JPWO2018139264A1 (ja) * | 2017-01-25 | 2019-08-08 | 株式会社クレハ | フッ化ビニリデン系樹脂フィルム |
US11136440B2 (en) | 2017-01-25 | 2021-10-05 | Kureha Corporation | Vinylidene fluoride resin film |
WO2018142933A1 (ja) * | 2017-01-31 | 2018-08-09 | ダイキン工業株式会社 | フッ素樹脂フィルム |
KR20190086767A (ko) * | 2017-01-31 | 2019-07-23 | 다이킨 고교 가부시키가이샤 | 불소 수지 필름 |
JPWO2018142933A1 (ja) * | 2017-01-31 | 2019-11-07 | ダイキン工業株式会社 | フッ素樹脂フィルム |
KR102349645B1 (ko) | 2017-01-31 | 2022-01-12 | 다이킨 고교 가부시키가이샤 | 불소 수지 필름 |
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EP2256760B1 (en) | 2019-08-07 |
CN101978446B (zh) | 2013-03-20 |
EP2256760A4 (en) | 2018-03-14 |
US20110013343A1 (en) | 2011-01-20 |
EP2256760A1 (en) | 2010-12-01 |
KR20100109942A (ko) | 2010-10-11 |
JP5246256B2 (ja) | 2013-07-24 |
CN101978446A (zh) | 2011-02-16 |
KR101152463B1 (ko) | 2012-06-01 |
US8576540B2 (en) | 2013-11-05 |
JPWO2009116527A1 (ja) | 2011-07-21 |
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