WO2012102121A1 - ポリイミド樹脂ワニス及びそれを用いた絶縁電線、電機コイル、モータ - Google Patents
ポリイミド樹脂ワニス及びそれを用いた絶縁電線、電機コイル、モータ Download PDFInfo
- Publication number
- WO2012102121A1 WO2012102121A1 PCT/JP2012/050782 JP2012050782W WO2012102121A1 WO 2012102121 A1 WO2012102121 A1 WO 2012102121A1 JP 2012050782 W JP2012050782 W JP 2012050782W WO 2012102121 A1 WO2012102121 A1 WO 2012102121A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- aromatic diamine
- polyimide resin
- aromatic
- polyimide
- resin varnish
- Prior art date
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- 229920001721 polyimide Polymers 0.000 title claims abstract description 72
- 239000009719 polyimide resin Substances 0.000 title claims abstract description 47
- 239000002966 varnish Substances 0.000 title claims abstract description 26
- 150000004984 aromatic diamines Chemical class 0.000 claims abstract description 65
- 125000005462 imide group Chemical group 0.000 claims abstract description 29
- 239000004642 Polyimide Substances 0.000 claims abstract description 24
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims abstract description 22
- 239000011347 resin Substances 0.000 claims abstract description 20
- 229920005989 resin Polymers 0.000 claims abstract description 20
- GTDPSWPPOUPBNX-UHFFFAOYSA-N ac1mqpva Chemical compound CC12C(=O)OC(=O)C1(C)C1(C)C2(C)C(=O)OC1=O GTDPSWPPOUPBNX-UHFFFAOYSA-N 0.000 claims abstract description 19
- 125000003118 aryl group Chemical group 0.000 claims abstract description 15
- 239000002243 precursor Substances 0.000 claims abstract description 15
- 125000006158 tetracarboxylic acid group Chemical group 0.000 claims abstract description 15
- 239000004020 conductor Substances 0.000 claims description 20
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims description 6
- 125000001624 naphthyl group Chemical group 0.000 claims description 6
- 238000004804 winding Methods 0.000 claims description 5
- LABVVLMFRIFJRX-UHFFFAOYSA-N 2-[4-[2-[4-(2-aminophenoxy)phenyl]propan-2-yl]phenoxy]aniline Chemical group C=1C=C(OC=2C(=CC=CC=2)N)C=CC=1C(C)(C)C(C=C1)=CC=C1OC1=CC=CC=C1N LABVVLMFRIFJRX-UHFFFAOYSA-N 0.000 claims description 4
- JCRRFJIVUPSNTA-UHFFFAOYSA-N 4-[4-(4-aminophenoxy)phenoxy]aniline Chemical compound C1=CC(N)=CC=C1OC(C=C1)=CC=C1OC1=CC=C(N)C=C1 JCRRFJIVUPSNTA-UHFFFAOYSA-N 0.000 claims description 4
- DJQPGZPKGHRJOK-UHFFFAOYSA-N 4-[4-[1-[4-(4-aminophenoxy)phenyl]cyclohexyl]phenoxy]aniline Chemical compound C1=CC(N)=CC=C1OC1=CC=C(C2(CCCCC2)C=2C=CC(OC=3C=CC(N)=CC=3)=CC=2)C=C1 DJQPGZPKGHRJOK-UHFFFAOYSA-N 0.000 claims description 3
- 238000006358 imidation reaction Methods 0.000 claims description 2
- 125000006160 pyromellitic dianhydride group Chemical group 0.000 claims 1
- 239000002075 main ingredient Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 41
- 230000000052 comparative effect Effects 0.000 description 9
- VLDPXPPHXDGHEW-UHFFFAOYSA-N 1-chloro-2-dichlorophosphoryloxybenzene Chemical compound ClC1=CC=CC=C1OP(Cl)(Cl)=O VLDPXPPHXDGHEW-UHFFFAOYSA-N 0.000 description 8
- 230000009477 glass transition Effects 0.000 description 8
- 150000008378 aryl ethers Chemical group 0.000 description 7
- QQGYZOYWNCKGEK-UHFFFAOYSA-N 5-[(1,3-dioxo-2-benzofuran-5-yl)oxy]-2-benzofuran-1,3-dione Chemical compound C1=C2C(=O)OC(=O)C2=CC(OC=2C=C3C(=O)OC(C3=CC=2)=O)=C1 QQGYZOYWNCKGEK-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 150000004985 diamines Chemical class 0.000 description 5
- 239000003960 organic solvent Substances 0.000 description 5
- 150000008065 acid anhydrides Chemical class 0.000 description 4
- -1 4-aminophenoxy Chemical group 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 3
- 239000004962 Polyamide-imide Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229920002312 polyamide-imide Polymers 0.000 description 3
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 description 2
- XUSNPFGLKGCWGN-UHFFFAOYSA-N 3-[4-(3-aminopropyl)piperazin-1-yl]propan-1-amine Chemical compound NCCCN1CCN(CCCN)CC1 XUSNPFGLKGCWGN-UHFFFAOYSA-N 0.000 description 2
- YBRVSVVVWCFQMG-UHFFFAOYSA-N 4,4'-diaminodiphenylmethane Chemical compound C1=CC(N)=CC=C1CC1=CC=C(N)C=C1 YBRVSVVVWCFQMG-UHFFFAOYSA-N 0.000 description 2
- YEJRWHAVMIAJKC-UHFFFAOYSA-N 4-Butyrolactone Chemical compound O=C1CCCO1 YEJRWHAVMIAJKC-UHFFFAOYSA-N 0.000 description 2
- WUPRYUDHUFLKFL-UHFFFAOYSA-N 4-[3-(4-aminophenoxy)phenoxy]aniline Chemical compound C1=CC(N)=CC=C1OC1=CC=CC(OC=2C=CC(N)=CC=2)=C1 WUPRYUDHUFLKFL-UHFFFAOYSA-N 0.000 description 2
- IAZDPXIOMUYVGZ-UHFFFAOYSA-N Dimethylsulphoxide Chemical compound CS(C)=O IAZDPXIOMUYVGZ-UHFFFAOYSA-N 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920003055 poly(ester-imide) Polymers 0.000 description 2
- 238000012643 polycondensation polymerization Methods 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- NSGXIBWMJZWTPY-UHFFFAOYSA-N 1,1,1,3,3,3-hexafluoropropane Chemical compound FC(F)(F)CC(F)(F)F NSGXIBWMJZWTPY-UHFFFAOYSA-N 0.000 description 1
- DKKYOQYISDAQER-UHFFFAOYSA-N 3-[3-(3-aminophenoxy)phenoxy]aniline Chemical compound NC1=CC=CC(OC=2C=C(OC=3C=C(N)C=CC=3)C=CC=2)=C1 DKKYOQYISDAQER-UHFFFAOYSA-N 0.000 description 1
- FAECBLCXGGBFOJ-UHFFFAOYSA-N 3-naphthalen-1-yloxyaniline Chemical compound NC1=CC=CC(OC=2C3=CC=CC=C3C=CC=2)=C1 FAECBLCXGGBFOJ-UHFFFAOYSA-N 0.000 description 1
- LJMPOXUWPWEILS-UHFFFAOYSA-N 3a,4,4a,7a,8,8a-hexahydrofuro[3,4-f][2]benzofuran-1,3,5,7-tetrone Chemical compound C1C2C(=O)OC(=O)C2CC2C(=O)OC(=O)C21 LJMPOXUWPWEILS-UHFFFAOYSA-N 0.000 description 1
- LFBALUPVVFCEPA-UHFFFAOYSA-N 4-(3,4-dicarboxyphenyl)phthalic acid Chemical compound C1=C(C(O)=O)C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)C(C(O)=O)=C1 LFBALUPVVFCEPA-UHFFFAOYSA-N 0.000 description 1
- QYIMZXITLDTULQ-UHFFFAOYSA-N 4-(4-amino-2-methylphenyl)-3-methylaniline Chemical group CC1=CC(N)=CC=C1C1=CC=C(N)C=C1C QYIMZXITLDTULQ-UHFFFAOYSA-N 0.000 description 1
- HLBLWEWZXPIGSM-UHFFFAOYSA-N 4-Aminophenyl ether Chemical compound C1=CC(N)=CC=C1OC1=CC=C(N)C=C1 HLBLWEWZXPIGSM-UHFFFAOYSA-N 0.000 description 1
- VQVIHDPBMFABCQ-UHFFFAOYSA-N 5-(1,3-dioxo-2-benzofuran-5-carbonyl)-2-benzofuran-1,3-dione Chemical compound C1=C2C(=O)OC(=O)C2=CC(C(C=2C=C3C(=O)OC(=O)C3=CC=2)=O)=C1 VQVIHDPBMFABCQ-UHFFFAOYSA-N 0.000 description 1
- HOOIIRHGHALACD-UHFFFAOYSA-N 5-(2,5-dioxooxolan-3-yl)-3-methylcyclohex-3-ene-1,2-dicarboxylic acid Chemical compound C1C(C(O)=O)C(C(O)=O)C(C)=CC1C1C(=O)OC(=O)C1 HOOIIRHGHALACD-UHFFFAOYSA-N 0.000 description 1
- ZHBXLZQQVCDGPA-UHFFFAOYSA-N 5-[(1,3-dioxo-2-benzofuran-5-yl)sulfonyl]-2-benzofuran-1,3-dione Chemical compound C1=C2C(=O)OC(=O)C2=CC(S(=O)(=O)C=2C=C3C(=O)OC(C3=CC=2)=O)=C1 ZHBXLZQQVCDGPA-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000881 Cu alloy Inorganic materials 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- FXHOOIRPVKKKFG-UHFFFAOYSA-N N,N-Dimethylacetamide Chemical compound CN(C)C(C)=O FXHOOIRPVKKKFG-UHFFFAOYSA-N 0.000 description 1
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 1
- 239000004697 Polyetherimide Substances 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical compound OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 description 1
- BKDVBBSUAGJUBA-UHFFFAOYSA-N bicyclo[2.2.2]oct-7-ene-2,3,5,6-tetracarboxylic acid Chemical compound C1=CC2C(C(O)=O)C(C(=O)O)C1C(C(O)=O)C2C(O)=O BKDVBBSUAGJUBA-UHFFFAOYSA-N 0.000 description 1
- WKDNYTOXBCRNPV-UHFFFAOYSA-N bpda Chemical compound C1=C2C(=O)OC(=O)C2=CC(C=2C=C3C(=O)OC(C3=CC=2)=O)=C1 WKDNYTOXBCRNPV-UHFFFAOYSA-N 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 125000003983 fluorenyl group Chemical group C1(=CC=CC=2C3=CC=CC=C3CC12)* 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000012766 organic filler Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000003495 polar organic solvent Substances 0.000 description 1
- 229920005575 poly(amic acid) Polymers 0.000 description 1
- 229920003223 poly(pyromellitimide-1,4-diphenyl ether) Polymers 0.000 description 1
- 229920001601 polyetherimide Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000009864 tensile test Methods 0.000 description 1
Images
Classifications
-
- 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
- H01B3/303—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups H01B3/38 or H01B3/302
- H01B3/306—Polyimides or polyesterimides
-
- 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
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
- C08L79/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08L79/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
- C09D179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C09D179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F5/00—Coils
- H01F5/06—Insulation of windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/30—Windings characterised by the insulating material
Definitions
- the present invention relates to a polyimide resin varnish that can be coated and baked on a conductor to form an insulating film, an insulated wire having an insulating layer formed using this polyimide resin varnish, an electric coil, and a motor using the same.
- an insulating layer (insulating film) covering the conductor is required to have excellent insulation, adhesion to the conductor, heat resistance, mechanical strength, and the like.
- the resin that forms the insulating layer include a polyimide resin, a polyamideimide resin, and a polyesterimide resin.
- a high voltage is applied to an insulated wire constituting the electric device, and partial discharge (corona discharge) is likely to occur on the surface of the insulating film.
- the generation of corona discharge is likely to cause local temperature rise and generation of ozone and ions.
- Insulated wires used at high voltages are also required to improve the corona discharge starting voltage for the above reasons, and it is known that reducing the dielectric constant of the insulating layer is effective for this purpose.
- Polyimide resin is a material with excellent heat resistance and relatively low dielectric constant.
- the polyimide resin has a rigid structure, there is a problem that the tensile elongation at break is small and the flexibility is low.
- a coil used for a motor may be subjected to a process of greatly deforming the insulated wire, such as forming the coil by winding the insulated wire and then inserting the coil into the slot.
- the insulating layer has low flexibility, the insulating film is likely to be damaged during processing, and the electrical characteristics may be deteriorated or the insulating film may be cracked.
- Patent Document 1 describes a polyimide resin having an aromatic ether structure. Specifically, a polyimide by reacting an acid anhydride having an aromatic ether structure such as 4,4′-oxydiphthalic dianhydride (ODPA) with a diamine having an aromatic ether structure and a diamine having a fluorene structure. The precursor is synthesized. The flexibility is improved by using an acid anhydride having an aromatic ether structure and a diamine. Further, it is described that the polyimide resin having such a structure has a low dielectric constant and can provide an insulating film excellent in suppressing corona generation.
- ODPA 4,4′-oxydiphthalic dianhydride
- the glass transition temperature of the polyimide resin described in the example of Patent Document 1 is 265 ° C. to 302 ° C., which is lower than the glass transition temperature of general polyimide (about 400 ° C.).
- the present invention has been made in view of the above problems, and provides a polyimide resin varnish capable of forming an insulating film capable of improving the workability by increasing the flexibility of the film without reducing the heat resistance. Let it be an issue.
- the present invention also provides an insulated wire having an insulating layer formed using the above-described polyimide resin varnish and capable of satisfying required characteristics such as heat resistance and mechanical strength, and an electric coil and a motor using the same. This is the issue.
- the present invention is a polyimide resin varnish mainly composed of a polyimide precursor resin obtained by reacting an aromatic diamine and an aromatic tetracarboxylic dianhydride,
- the aromatic diamine is A first aromatic diamine having an aromatic ether bond represented by the following formula (1) and having a total of three or more of one or both of a benzene ring and a naphthalene ring;
- a first aromatic diamine having an aromatic ether structure and a total of three or more of one or both of a benzene ring and a naphthalene ring is used.
- the first aromatic diamine is a flexible component having a large molecular weight because it has three or more benzene rings or naphthalene rings.
- a second aromatic diamine having two benzene rings is used in combination with the first aromatic diamine. By using the second aromatic diamine in combination, the strength of the polyimide resin can be increased.
- the imide group concentration is (Molecular weight of imide group) / (Molecular weight of all polymers) ⁇ 100 (%) It is a value calculated by. Since the polyimide precursor is obtained by reacting an aromatic diamine and an aromatic tetracarboxylic dianhydride, the imide group concentration is increased when the molecular weight of each monomer (aromatic diamine or aromatic tetracarboxylic dianhydride) increases. Get smaller. When the imide group concentration is lower than 25%, the heat resistance is lowered, and when the imide group concentration is higher than 35%, the flexibility tends to be lowered. By setting the imide group concentration in the range of 25% or more and 35% or less, a polyimide resin having a balance between heat resistance and flexibility can be obtained.
- the first aromatic diamine used in the present invention has a large molecular weight
- the molecular weight of the aromatic tetracarboxylic dianhydride used in combination with the first aromatic diamine is also large, the imide group concentration in the entire polyimide resin is reduced and the heat resistance is reduced. descend.
- the first aromatic diamine and the second aromatic diamine are used as the diamine component, and the aromatic tetracarboxylic dianhydride component having a molecular weight such that the imide group concentration is 25% to 35% is used.
- the polyimide resin which can be compatible with heat resistance and a softness
- concentration of a highly polar imide group becomes lower than the imide group density
- the aromatic tetracarboxylic dianhydride is preferably pyromellitic dianhydride (hereinafter PMDA) (Claim 2). Since pyromellitic dianhydride has a relatively small molecular weight and a rigid structure, even when a flexible component having a large molecular weight is selected as the first aromatic diamine, the polyimide imide group concentration is 25% or more and 35% or less. It is possible to achieve both the flexibility and heat resistance of the polyimide resin.
- PMDA pyromellitic dianhydride
- Examples of the first aromatic diamine include 2,2-bis [4- (aminophenoxy) phenyl] propane, 1,1-bis [4- (4-aminophenoxy) phenyl] cyclohexane, 1,3-bis ( It is preferable to select one or more selected from the group consisting of 4-aminophenoxy) benzene and 1,4-bis (4-aminophenoxy) benzene.
- These aromatic diamines have a large molecular weight and can improve the flexibility of the polyimide resin.
- PMDA is selected as the acid anhydride
- the balance between flexibility, heat resistance, and mechanical strength (tensile strength) is preferable.
- the content ratio (molar ratio) between the first aromatic diamine and the second aromatic diamine is preferably 30:70 to 90:10 (claim 4). 50:50 to 80:20 is more preferable.
- the amount of the first aromatic diamine is less than this range, the elongation of the polyimide resin may be small and the flexibility may be insufficient.
- the amount of the second aromatic diamine is less than this range, defects such as pinholes are likely to occur in the polyimide resin film, and it becomes difficult to obtain sufficient toughness.
- Invention of Claim 5 is an insulated wire which has an insulating layer which coat
- the invention according to claim 6 is an electric coil formed by winding the insulated wire.
- a seventh aspect of the present invention is a motor having the electric coil according to the sixth aspect. Since an insulated wire excellent in workability and heat resistance is used, a coil with a high space factor can be obtained, and the coil and motor can be downsized. Further, even when a high voltage is applied, the insulating film is hardly deteriorated, so that the life can be extended.
- the present invention it is possible to provide a polyimide resin varnish for an insulated wire excellent in mechanical strength such as flexibility and tensile strength and heat resistance. Moreover, the insulated wire of the present invention can satisfy required characteristics such as heat resistance and mechanical strength, and can improve the corona discharge start voltage.
- FIG. 3A It is a schematic diagram explaining the measuring method of a dielectric constant. It is a cross-sectional schematic diagram which shows an example of the insulated wire of this invention. It is a schematic diagram which shows an example of the coil of this invention. 3B is a schematic diagram showing an example of the coil of the present invention, and is a cross-sectional view taken along the line A-A ′ of FIG. 3A. FIG. It is a schematic diagram which shows an example of the motor of this invention.
- the polyimide precursor resin (polyamic acid) which is the main component of the polyimide resin varnish of the present invention is obtained by condensation polymerization of an aromatic tetracarboxylic dianhydride and an aromatic diamine. This condensation polymerization reaction can be performed under the same conditions as in the synthesis of a conventional polyimide precursor.
- aromatic tetracarboxylic dianhydrides include pyromellitic dianhydride (PMDA), 4,4′-oxydiphthalic dianhydride (ODPA), 3,4,3 ′, 4′-biphenyltetracarboxylic dianhydride.
- Anhydride (BPDA), 3,3 ′, 4,4′-benzophenone tetracarboxylic dianhydride (BTDA), 3,3 ′, 4,4′-diphenylsulfone tetracarboxylic dianhydride, bicyclo (2, 2,2) -Oct-7-ene-2,3,5,6-tetracarboxylic dianhydride, 1,2,4,5-cyclohexanetetracarboxylic dianhydride, 2,2-bis (3 Examples include 4-dicarboxyphenyl) hexafluoropropane dianhydride, 5- (2,5-dioxotetrahydrofuryl) -3-methyl-3-cyclohexene-1,2-dicarboxylic dianhydride, and the like.
- pyromellitic dianhydride (PMDA) represented by the following formula (3) is preferable because it has a low molecular weight and a rigid structure and can improve the heat resistance of the polyimide resin.
- the first aromatic diamine and the second aromatic diamine are used in combination.
- the first aromatic diamine one having an aromatic ether bond and a total of three or more of one or both of a benzene ring and a naphthalene ring is used.
- BAPP 2,2-bis [4- (aminophenoxy) phenyl] propane
- BAPP 1,1-bis [4- (4-) represented by the following formula (5)
- TPE-R 1,3-bis (4-aminophenoxy) benzene
- TPE-Q 1,4-bis (4-aminophenoxy) Benzene
- an aromatic diamine represented by the following formula (2) and having two benzene rings is used.
- MDA 4,4′-methylenedianiline
- ODA 4,4′-diaminodiphenyl ether
- the aromatic tetracarboxylic dianhydride, the first aromatic diamine, and the second aromatic diamine are selected so that the imide group concentration after imidization is 25% or more and 35% or less.
- the imide group concentration is (Molecular weight of imide group) / (Molecular weight of all polymers) ⁇ 100 It is a value calculated by. Specifically, the imide group concentration is calculated by the following method.
- concentration in a unit unit is calculated from the molecular weight of aromatic tetracarboxylic dianhydride and aromatic diamine.
- the above aromatic tetracarboxylic dianhydride, the first aromatic diamine and the second aromatic diamine are mixed and reacted.
- the mixing ratio of the first aromatic diamine and the second aromatic diamine is 30:70 to 90:10 (molar ratio). 50:50 to 80:20 is more preferable.
- the reaction proceeds favorably, which is preferable.
- an aprotic polar organic solvent such as N-methyl-2-pyrrolidone, N, N-dimethylformamide, N, N-dimethylacetamide, dimethyl sulfoxide, ⁇ -butyrolactone can be used. These organic solvents may be used alone or in combination of two or more.
- the amount of the organic solvent is not particularly limited as long as it can uniformly disperse the aromatic acid anhydride component, the aromatic diamine component and the like, but is usually 100 mass per 100 mass parts of the total amount of these components. To 1000 parts by mass (so that the resin concentration is about 10% to 50%). When the amount of the organic solvent is reduced, the amount of the solid content of the polyimide resin varnish thus obtained is increased, which is effective for cost reduction.
- additives such as pigments, dyes, inorganic or organic fillers, lubricants, adhesion improvers, reactive low molecules, compatibilizers, and the like may be added to the polyimide resin varnish.
- other resins can be mixed and used within a range not impairing the gist of the present invention.
- a polyimide resin varnish is applied on a conductor directly or through another layer and baked to form an insulating layer.
- the polyimide precursor resin is imidized to become polyimide.
- Application and baking can be performed in the same manner as in the production of a normal insulated wire.
- an insulating layer is formed by repeating several times of baking in a furnace with a preset temperature of 350 to 500 ° C. for 5 to 10 seconds per pass. The thickness of the insulating layer is 10 ⁇ m to 150 ⁇ m.
- the conductor copper, copper alloy, aluminum or the like can be used.
- the size of the conductor and the cross-sectional shape thereof are not particularly limited, but in the case of a round wire, a conductor diameter of 100 ⁇ m to 5 mm is generally used, and in the case of a flat wire, one having a side length of 500 ⁇ m to 5 mm is generally used.
- the insulating layer may be a single layer or multiple layers.
- the insulating layer is a single layer, only the insulating layer formed by applying and baking the above polyimide resin varnish becomes the insulating layer.
- the insulating layer has a multilayer structure, another insulating layer is formed before or after the formation of the insulating layer made of polyimide.
- the resin for forming the other insulating layer any resin such as polyimide, polyamideimide, polyesterimide, polyurethane, and polyetherimide can be used.
- a surface lubricating layer as the outermost layer as the insulating layer because workability is improved. Moreover, you may apply
- FIG. 2 is a schematic sectional view showing an example of the insulated wire of the present invention.
- a multilayer insulating layer is provided outside the conductor 1, and the insulating layer is a first insulating layer 2, a second insulating layer 3, and a surface lubricating layer 4 from the conductor side.
- a polyamideimide resin varnish added with an adhesion improver is applied and baked to form the first insulating layer 2, and the polyimide resin varnish of the present invention is applied and baked to form the second resin layer 3.
- the insulated wire of the present invention is not limited to this shape.
- FIG. 3A is a schematic view showing an example of the electric coil of the present invention
- FIG. 3B is a cross-sectional view taken along line A-A ′ of FIG. 3A
- the electric wire 12 is formed by winding the insulated wire 11 outside the core 13 made of a magnetic material.
- a member composed of a core and an electric coil is used as a rotor or a stator of a motor.
- a stator 15 in which a plurality of divided stators 14 including a core 13 and an electric coil 12 are combined and arranged in an annular shape is used as a constituent member of a motor.
- Examples 1 to 8, Comparative Examples 1 to 6) Preparation of polyimide precursor resin
- the types and amounts of aromatic diamines shown in Tables 1 and 2 are dissolved in N-methylpyrrolidone, the types and amounts of aromatic tetracarboxylic acid anhydrides shown in Table 1 are added, and then at room temperature for 1 hour in a nitrogen atmosphere. Stir. Thereafter, the mixture was stirred at 60 ° C. for 20 hours to finish the reaction, and cooled to room temperature to obtain a polyimide resin varnish.
- the numerical value of the compounding amount described in Table 1 is a molar ratio.
- Table 1 shows the imide group concentration calculated from the molecular weight of each component.
- Polyimide resin varnish is applied to the surface of a conductor wire with a conductor diameter (diameter) of about 1 mm and baked to form an insulation layer with a thickness of about 40 ⁇ m, thereby producing insulated wires of Examples 1-8 and Comparative Examples 1-6. did.
- the conductor is removed from the resulting insulated wire to form a tubular insulating layer, and the glass transition temperature is measured using a dynamic viscoelasticity measuring device (DMS) at a temperature range of 20 ° C. to 500 ° C. and a temperature increase rate of 10 ° C./min did.
- DMS dynamic viscoelasticity measuring device
- a conductor was removed from the obtained insulated wire to form a tubular insulating layer, and a tensile test was performed using a tensile tester at a distance between chucks of 20 mm and 10 mm / min to measure elongation at break.
- the polyimide films of Examples 1 to 8 using an aromatic diamine having two benzene rings and an aromatic diamine having three or more benzene rings and having an imide group concentration of 25% to 35% are all
- the glass transition temperature is 300 ° C. or higher
- the film elongation is 100% or higher
- both heat resistance and flexibility are achieved.
- the dielectric constant is also 2.9 to 3.1, which is lower than that of a general polyimide resin.
- Comparative Example 1 does not use an aromatic diamine having 3 or more benzene rings, the glass transition temperature is high but the film elongation is less than 100%.
- Comparative Example 2 does not use the first aromatic diamine having two benzene rings, but uses paraphenylenediamine (PPD) having one benzene ring. Similar to Comparative Example 1, the glass transition temperature is high but the film elongation is small.
- Comparative Example 3 and Comparative Example 4 use only the second aromatic diamine having three or more benzene rings. The film strength was low and cracking occurred, and the film elongation was not measurable.
- Comparative Example 5 also uses only the second aromatic diamine having three or more benzene rings.
- the acid component 4,4′-oxydiphthalic dianhydride (ODPA) having an aromatic ether bond in the molecule is used, so that the film elongation is 100% or more, but the glass transition temperature is low and the heat resistance is high. Inferior.
- ODPA 4,4′-oxydiphthalic dianhydride
- Comparative Example 6 the first aromatic diamine having two benzene rings and the second aromatic diamine having three or more benzene rings are used in combination, but the imide group concentration is higher than 35%. The film elongation is less than 100% and the flexibility is inferior.
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Abstract
Description
前記芳香族ジアミンは、
下記式(1)で表される芳香族エーテル結合を有すると共にベンゼン環、ナフタレン環の一方又は両方を合計3つ以上有する第1の芳香族ジアミンと、
下記式(2)で表される第2の芳香族ジアミンとからなり、
前記ポリイミド前駆体樹脂のイミド化後のイミド基濃度が25%以上35%以下である、ポリイミド樹脂ワニスである(請求項1)。
(イミド基部分の分子量)/(全ポリマーの分子量)×100(%)
で計算される値である。ポリイミド前駆体は芳香族ジアミンと芳香族テトラカルボン酸二無水物とを反応して得られるので、各モノマー(芳香族ジアミン又は芳香族テトラカルボン酸二無水物)の分子量が大きくなるとイミド基濃度は小さくなる。イミド基濃度が25%よりも低くなると耐熱性が低くなり、イミド基濃度が35%よりも大きくなると柔軟性が低下する傾向がある。イミド基濃度を25%以上35%以下の範囲とすることで耐熱性と柔軟性とのバランスの取れたポリイミド樹脂を得ることができる。
(イミド基部分の分子量)/(全ポリマーの分子量)×100
で計算される値である。具体的には以下の方法でイミド基濃度を計算する。
イミド基分子量=70.03×2=140.06
ユニット分子量=894.96となるため、
イミド基濃度(%)=(140.06)/(894.96)×100=15.6%
となる。第1の芳香族ジアミンを含有するユニットのイミド基濃度と第2の芳香族ジアミンを含有するイミド基濃度とをそれぞれ求め、第1の芳香族ジアミンと第2の芳香族ジアミンの含有割合をかけてポリイミド全体のイミド基濃度を計算する。
(ポリイミド前駆体樹脂の作製)
表1及び表2に示す種類と量の芳香族ジアミンをN-メチルピロリドンに溶解させた後、表1に示す種類と量の芳香族テトラカルボン酸無水物を加えて窒素雰囲気下室温で1時間撹拌した。その後60℃で20時間撹拌し反応を終え、室温まで冷却してポリイミド樹脂ワニスを得た。なお表1に記載している配合量の数値はモル比である。また各成分の分子量から計算したイミド基濃度を表1中に記載している。
ポリイミド樹脂ワニスを導体径(直径)約1mmの導線の表面に常法によって塗布、焼付けして厚み約40μmの絶縁層を形成し、実施例1~8、比較例1~6の絶縁電線を作製した。
得られた絶縁電線から導体を取り除いてチューブ状の絶縁層とし、動的粘弾性測定装置(DMS)を用いて温度範囲20℃~500℃、昇温速度10℃/分でガラス転移温度を測定した。
得られた絶縁電線から導体を取り除いてチューブ状の絶縁層とし、引張試験機を用いてチャック間距離20mm、10mm/minで引張試験を行い、破断伸びを測定した。
得られた各絶縁電線について、絶縁層の誘電率を測定した。図1に示すように、絶縁電線の表面3カ所に銀ペーストを塗布して測定用のサンプルを作製した(塗布幅は両端2カ所が10mm、中央部分が100mmである)。導体と銀ペースト間の静電容量をLCRメータで測定し、測定した静電容量の値と被膜の厚みから誘電率を算出した。なお測定は温度30℃、湿度50%の条件で行った。以上の評価結果を表1及び表2に示す。
2 第1の絶縁層
3 第2の絶縁層
4 表面潤滑層
11 絶縁電線
12 電機コイル
13 コア
14 分割ステータ
15 ステータ
Claims (7)
- 前記芳香族テトラカルボン酸二無水物が、ピロメリット酸二無水物である、請求項1に記載のポリイミド樹脂ワニス。
- 前記第1の芳香族ジアミンが、2,2-ビス[4-(アミノフェノキシ)フェニル]プロパン、1,1-ビス[4-(4-アミノフェノキシ)フェニル]シクロヘキサン、1,3-ビス(4-アミノフェノキシ)ベンゼン、及び1,4-ビス(4-アミノフェノキシ)ベンゼンからなる群から選択される1種以上である、請求項1又は2に記載のポリイミド樹脂ワニス。
- 前記第1の芳香族ジアミンと、前記第2の芳香族ジアミンとの含有比率(モル比)が30:70~90:10である、請求項1~3のいずれか1項に記載のポリイミド樹脂ワニス。
- 導体及び該導体を直接又は他の層を介して被覆する絶縁層を有する絶縁電線であって、前記絶縁層は、請求項1~4のいずれか1項に記載のポリイミド樹脂ワニスを塗布、焼付けして形成された絶縁層である、絶縁電線。
- 請求項5に記載の絶縁電線を捲線してなる電機コイル。
- 請求項6に記載の電機コイルを有するモータ。
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US13/807,616 US20130098656A1 (en) | 2011-01-28 | 2012-01-17 | Polyimide resin varnish, and insulated wire, electrical coil, and motor using same |
CN201280001743XA CN103003332A (zh) | 2011-01-28 | 2012-01-17 | 聚酰亚胺树脂清漆、以及使用该聚酰亚胺树脂清漆的绝缘线、电线圈和电动机 |
KR1020127034002A KR20130141348A (ko) | 2011-01-28 | 2012-01-17 | 폴리이미드 수지 바니쉬 및 그것을 이용한 절연 전선, 전기 코일, 모터 |
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JP2011-016219 | 2011-01-28 |
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US10546667B2 (en) | 2012-10-16 | 2020-01-28 | Hitachi Metals, Ltd. | Insulated wire and coil using same |
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WO2022180791A1 (ja) * | 2021-02-26 | 2022-09-01 | 東特塗料株式会社 | 絶縁層形成用樹脂ワニス |
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JPH0649361A (ja) * | 1992-07-30 | 1994-02-22 | Mitsui Toatsu Chem Inc | ポリアミド酸水溶液 |
JPH09106711A (ja) * | 1995-10-11 | 1997-04-22 | Sumitomo Electric Ind Ltd | 絶縁された電線 |
WO2004031270A1 (ja) * | 2002-10-07 | 2004-04-15 | Teijin Limited | ポリイミドフィルムおよびその製造法 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
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US20130161061A1 (en) * | 2011-12-22 | 2013-06-27 | Hitachi Cable, Ltd. | Insulated wire and coil using the same |
CN103680697A (zh) * | 2012-09-03 | 2014-03-26 | 日立金属株式会社 | 绝缘电线和使用该绝缘电线的线圈 |
US10546667B2 (en) | 2012-10-16 | 2020-01-28 | Hitachi Metals, Ltd. | Insulated wire and coil using same |
Also Published As
Publication number | Publication date |
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CN103003332A (zh) | 2013-03-27 |
JP2012153848A (ja) | 2012-08-16 |
KR20130141348A (ko) | 2013-12-26 |
US20130098656A1 (en) | 2013-04-25 |
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