WO2023058565A1 - ボンド磁石用樹脂組成物ならびにそれを用いた成形体 - Google Patents
ボンド磁石用樹脂組成物ならびにそれを用いた成形体 Download PDFInfo
- Publication number
- WO2023058565A1 WO2023058565A1 PCT/JP2022/036645 JP2022036645W WO2023058565A1 WO 2023058565 A1 WO2023058565 A1 WO 2023058565A1 JP 2022036645 W JP2022036645 W JP 2022036645W WO 2023058565 A1 WO2023058565 A1 WO 2023058565A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- resin composition
- powder
- bonded magnets
- resin
- hydrotalcite
- Prior art date
Links
- 239000011342 resin composition Substances 0.000 title claims abstract description 66
- 229920005989 resin Polymers 0.000 claims abstract description 41
- 239000011347 resin Substances 0.000 claims abstract description 41
- QANIADJLTJYOFI-UHFFFAOYSA-K aluminum;magnesium;carbonate;hydroxide;hydrate Chemical compound O.[OH-].[Mg+2].[Al+3].[O-]C([O-])=O QANIADJLTJYOFI-UHFFFAOYSA-K 0.000 claims abstract description 33
- 239000006247 magnetic powder Substances 0.000 claims abstract description 30
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 claims description 9
- 229960001545 hydrotalcite Drugs 0.000 claims description 9
- 229910001701 hydrotalcite Inorganic materials 0.000 claims description 9
- 229910003023 Mg-Al Inorganic materials 0.000 claims description 6
- 238000005452 bending Methods 0.000 abstract description 6
- 230000002542 deteriorative effect Effects 0.000 abstract description 2
- 239000002245 particle Substances 0.000 description 34
- 239000000843 powder Substances 0.000 description 27
- 238000000034 method Methods 0.000 description 22
- 229910000859 α-Fe Inorganic materials 0.000 description 22
- 239000007789 gas Substances 0.000 description 14
- 239000000203 mixture Substances 0.000 description 13
- 229910052761 rare earth metal Inorganic materials 0.000 description 10
- 238000000465 moulding Methods 0.000 description 9
- 150000002910 rare earth metals Chemical class 0.000 description 9
- 239000003963 antioxidant agent Substances 0.000 description 8
- 239000007864 aqueous solution Substances 0.000 description 8
- 238000001746 injection moulding Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 230000006866 deterioration Effects 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 230000000704 physical effect Effects 0.000 description 6
- 238000012360 testing method Methods 0.000 description 6
- 230000003078 antioxidant effect Effects 0.000 description 5
- 239000007822 coupling agent Substances 0.000 description 5
- 230000004907 flux Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 229910021645 metal ion Inorganic materials 0.000 description 5
- -1 Cl − Chemical class 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 4
- 230000005415 magnetization Effects 0.000 description 4
- 239000000155 melt Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- OFOBLEOULBTSOW-UHFFFAOYSA-N Malonic acid Chemical compound OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 229910001035 Soft ferrite Inorganic materials 0.000 description 3
- 239000002250 absorbent Substances 0.000 description 3
- 230000002745 absorbent Effects 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 150000001450 anions Chemical class 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 235000014113 dietary fatty acids Nutrition 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000194 fatty acid Substances 0.000 description 3
- 229930195729 fatty acid Natural products 0.000 description 3
- 239000011777 magnesium Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- 229910052712 strontium Inorganic materials 0.000 description 3
- 239000012756 surface treatment agent Substances 0.000 description 3
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 159000000007 calcium salts Chemical class 0.000 description 2
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 description 2
- 239000008116 calcium stearate Substances 0.000 description 2
- 235000013539 calcium stearate Nutrition 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 150000004665 fatty acids Chemical class 0.000 description 2
- 238000004898 kneading Methods 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- HQKMJHAJHXVSDF-UHFFFAOYSA-L magnesium stearate Chemical compound [Mg+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O HQKMJHAJHXVSDF-UHFFFAOYSA-L 0.000 description 2
- 239000006078 metal deactivator Substances 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N nitrogen Substances N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910000077 silane Inorganic materials 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- OYHQOLUKZRVURQ-NTGFUMLPSA-N (9Z,12Z)-9,10,12,13-tetratritiooctadeca-9,12-dienoic acid Chemical compound C(CCCCCCC\C(=C(/C\C(=C(/CCCCC)\[3H])\[3H])\[3H])\[3H])(=O)O OYHQOLUKZRVURQ-NTGFUMLPSA-N 0.000 description 1
- MXJJJAKXVVAHKI-WRBBJXAJSA-N (9z,29z)-octatriaconta-9,29-dienediamide Chemical compound NC(=O)CCCCCCC\C=C/CCCCCCCCCCCCCCCCCC\C=C/CCCCCCCC(N)=O MXJJJAKXVVAHKI-WRBBJXAJSA-N 0.000 description 1
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 description 1
- HNSDLXPSAYFUHK-UHFFFAOYSA-N 1,4-bis(2-ethylhexyl) sulfosuccinate Chemical compound CCCCC(CC)COC(=O)CC(S(O)(=O)=O)C(=O)OCC(CC)CCCC HNSDLXPSAYFUHK-UHFFFAOYSA-N 0.000 description 1
- RTBFRGCFXZNCOE-UHFFFAOYSA-N 1-methylsulfonylpiperidin-4-one Chemical compound CS(=O)(=O)N1CCC(=O)CC1 RTBFRGCFXZNCOE-UHFFFAOYSA-N 0.000 description 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 description 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 description 1
- 239000005642 Oleic acid Substances 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 238000003917 TEM image Methods 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- WOIHABYNKOEWFG-UHFFFAOYSA-N [Sr].[Ba] Chemical compound [Sr].[Ba] WOIHABYNKOEWFG-UHFFFAOYSA-N 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- JFCQEDHGNNZCLN-UHFFFAOYSA-N anhydrous glutaric acid Natural products OC(=O)CCCC(O)=O JFCQEDHGNNZCLN-UHFFFAOYSA-N 0.000 description 1
- 239000003945 anionic surfactant Substances 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 1
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 150000002222 fluorine compounds Chemical class 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- RKVQXYMNVZNJHZ-UHFFFAOYSA-N hexacosanediamide Chemical compound NC(=O)CCCCCCCCCCCCCCCCCCCCCCCCC(N)=O RKVQXYMNVZNJHZ-UHFFFAOYSA-N 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910000765 intermetallic Inorganic materials 0.000 description 1
- 238000004255 ion exchange chromatography Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 description 1
- YWXYYJSYQOXTPL-SLPGGIOYSA-N isosorbide mononitrate Chemical compound [O-][N+](=O)O[C@@H]1CO[C@@H]2[C@@H](O)CO[C@@H]21 YWXYYJSYQOXTPL-SLPGGIOYSA-N 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910052746 lanthanum Inorganic materials 0.000 description 1
- HGPXWXLYXNVULB-UHFFFAOYSA-M lithium stearate Chemical compound [Li+].CCCCCCCCCCCCCCCCCC([O-])=O HGPXWXLYXNVULB-UHFFFAOYSA-M 0.000 description 1
- 150000002681 magnesium compounds Chemical class 0.000 description 1
- 159000000003 magnesium salts Chemical class 0.000 description 1
- 235000019359 magnesium stearate Nutrition 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 description 1
- 235000021313 oleic acid Nutrition 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- AJCDFVKYMIUXCR-UHFFFAOYSA-N oxobarium;oxo(oxoferriooxy)iron Chemical group [Ba]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O.O=[Fe]O[Fe]=O AJCDFVKYMIUXCR-UHFFFAOYSA-N 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000002530 phenolic antioxidant Substances 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- DXGIRFAFSFKYCF-UHFFFAOYSA-N propanehydrazide Chemical compound CCC(=O)NN DXGIRFAFSFKYCF-UHFFFAOYSA-N 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 235000003441 saturated fatty acids Nutrition 0.000 description 1
- 150000004671 saturated fatty acids Chemical class 0.000 description 1
- 229910000702 sendust Inorganic materials 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
- 150000005846 sugar alcohols Chemical class 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 150000003568 thioethers Chemical class 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/06—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder
- H01F1/08—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys in the form of particles, e.g. powder pressed, sintered, or bound together
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/10—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
- H01F1/11—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
- H01F1/113—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles in a bonding agent
Definitions
- the present disclosure relates to a resin composition for bonded magnets that is excellent in physical properties such as heat resistance, bending strength, and IZOD impact strength without degrading magnetic properties, and that can reduce the generation of corrosive gas.
- the present disclosure also relates to a bonded magnet molded body using the resin composition.
- bonded magnets have the advantage of being lighter and having better dimensional accuracy than sintered magnets. Furthermore, there is also an advantage that even bonded magnets with complicated shapes can be mass-produced easily. Therefore, bonded magnets are widely used in various applications such as toys, office equipment, audio equipment, and motors.
- Rare earth magnet powders represented by Nd--Fe--B systems or ferrite particle powders are known as magnetic powders used in bonded magnets. Rare earth magnet powders have high magnetic properties, but are expensive. Therefore, the applications in which rare earth magnet powder can be used are limited. On the other hand, ferrite particles are inferior to rare earth magnet powders in terms of magnetic properties. However, ferrite particle powder is inexpensive and chemically stable. Therefore, ferrite particle powder is used in a wide range of applications.
- kneaded rubber or plastic materials and magnetic powder are generally molded in a magnetic field or by mechanical means.
- bonded magnets are used as rotors or sensors.
- High heat resistance and mechanical strength are strongly required for the bonded magnets used in order to extend the life of the device and use it at high speed rotation. Therefore, a bonded magnet using a PPS resin as a binder resin is used. It is known that this bonded magnet has high heat resistance and can suppress deterioration of mechanical properties at high temperatures.
- Patent Document 1 by mixing PPS resin and PA resin in a predetermined ratio, and in Patent Document 2, modified polyolefins and glass fibers are added to PPS resin to achieve high heat resistance. It has been proposed to prepare a compound for a bonded magnet that has good mechanical strength and excellent magnetic properties.
- Patent Document 3 proposes a resin composition for bonded magnets containing a phosphorus-based antioxidant in order to obtain a bonded magnet capable of suppressing a decrease in strength even when exposed to a high-temperature environment.
- bonded magnets using PPS resin are affected by the corrosive gas (Cl ⁇ or SO 4 2 ⁇ ) derived from the PPS resin, which increases the frequency of maintenance of the mold during the production process and shortens the life of the mold. There are concerns about shortening and deterioration of the bond magnet. Therefore, reduction of corrosive gas is strongly demanded.
- a resin composition for a bonded magnet which is excellent in physical properties such as heat resistance, bending strength, and IZOD impact strength without deteriorating magnetic properties, and which can reduce the generation of corrosive gas, and the same.
- the technical problem is to obtain a molded body using.
- the resin composition for a bonded magnet according to Embodiment 1 contains magnetic powder, PPS resin, and hydrotalcite powder, and contains 0.1 to 25.0% by weight of hydrotalcite relative to the PPS resin. .
- the resin composition for bonded magnets according to Embodiment 2 is the resin composition for bonded magnets according to Embodiment 1, which contains 5 to 30% by weight of PPS resin.
- the resin composition for bonded magnets according to Embodiment 3 is the resin composition for bonded magnets according to Embodiments 1 or 2 containing 0.01 to 4.0% by weight of hydrotalcite.
- the resin composition for bonded magnets according to Embodiment 4 is the resin composition for bonded magnets according to any one of Embodiments 1 to 3, wherein the hydrotalcite powder is Mg—Al hydrotalcite.
- the resin composition for bonded magnets according to Embodiment 5 is a molded body molded using the resin composition for bonded magnets according to any one of Embodiments 1 to 4.
- the generation of corrosive gas can be reduced without reducing Br (residual magnetic flux density).
- a molded article obtained using the resin composition for a bonded magnet according to the present embodiment has physical properties such as high bending strength and high IZOD impact strength. Therefore, this resin composition is suitable for use in molding bonded magnets.
- the resin composition for a bonded magnet according to this embodiment contains at least magnetic powder, PPS resin, and hydrotalcite powder.
- the magnetic powder used in this embodiment is not particularly limited. Magnetic powders normally used for bonded magnets, such as ferrite particle powders or rare earth magnetic powders, can be used.
- a preferred ferrite particle powder is a magnetoplumbite-type ferrite particle powder.
- Particle powder, strontium ferrite particle powder, barium-strontium ferrite particle powder, and one selected from 0.1 to 7.0 mol% of Ti, Mn, Al, La, Zn, Bi, and Co A particulate powder comprising a seed or two or more elements.
- the ferrite particle powder preferably has an average particle size of 1.0 to 5.0 ⁇ m, more preferably 1.0 to 2.0 ⁇ m.
- the BET specific surface area is preferably 1-10 m 2 /g, more preferably 1-5 m 2 /g.
- the coercive force iHc is preferably 119-557 kA/m (1500-7000 Oe), more preferably 119-398 kA/m (1500-5000 Oe).
- the residual magnetization is preferably 100-300 mT (1000-3000 G), more preferably 100-200 mT (1000-2000 G).
- a rare earth magnetic powder is an intermetallic compound containing at least one rare earth element and at least one transition metal among its constituent elements.
- magnetic powders such as rare earth cobalt-based, rare earth-iron-boron-based, and rare earth-iron-nitrogen-based magnetic powders can be used.
- rare earth-iron-boron magnetic powder or rare earth-iron-nitrogen magnetic powder is used, a bonded magnet having excellent magnetic properties can be obtained.
- the average particle size of the rare earth magnetic powder is preferably 1-120 ⁇ m, more preferably 1-80 ⁇ m.
- the BET specific surface area is preferably 0.5-5 m 2 /g, more preferably 0.5-3 m 2 /g.
- the magnetic force iHc is preferably 239-1591 kA/m (3.0-20 kOe), more preferably 318-1114 kA/m (4.0-15 kOe).
- the residual magnetization is preferably 0.3-1.8 mT (3.0-18 kG), more preferably 0.5-1.3 mT (5.0-13 kG).
- the Nd--Fe--B magnetic powder can be used as it is for kneading.
- the flaky powder is preferably pulverized with a jet mill, atomizer, ball mill, or the like in order to obtain higher fluidity and magnetic properties. .
- a flaky powder having an average particle size of 100 ⁇ m or less is obtained.
- soft ferrite particle powders examples include Mn--Zn ferrite, Ni--Zn ferrite, Ni--Zn--Cu ferrite, Mn--Mg ferrite, carbonyl iron powder, and sendust. Also, the composition of the soft ferrite used can be changed according to the frequency of the electromagnetic wave used.
- the average particle size of the soft ferrite powder is preferably 1-150 ⁇ m, more preferably 1-50 ⁇ m.
- these magnetic powders are subjected to various surface treatments in order to suppress deterioration of magnetic properties due to oxidation, improve compatibility with resins, and improve the strength of molded products.
- Examples of materials that can be used for surface treatment include silane-based coupling agents, titanium-based coupling agents, aluminum-based coupling agents, siloxane polymers, organic phosphoric acid-based surface treatment agents, and inorganic phosphoric acid-based surface treatment agents. be done.
- silane-based coupling agents titanium-based coupling agents, aluminum-based coupling agents, siloxane polymers, organic phosphoric acid-based surface treatment agents, and inorganic phosphoric acid-based surface treatment agents.
- the hydrotalcite powder used in this embodiment has a general formula: [M 2+ 1 ⁇ x M 3+ x (OH) 2 ][A n ⁇ x/n ⁇ mH 2 O] (wherein M 2+ is Mg 2+ , Co 2+ , Ni 2+ , Zn 2+ , etc.
- M 3+ represents trivalent metal ions, such as Al 3+ , Fe 3+ , Cr 3+ , A n ⁇ represents OH ⁇ , Interlayer anions such as Cl ⁇ , CO 3 2 ⁇ , SO 4 2 ⁇ , etc.
- x satisfies 0 ⁇ x ⁇ 1
- n is the valence of A
- m satisfies 0 ⁇ m ⁇ 1. It is a layered compound represented by
- the hydrotalcite powder used in the present embodiment is preferably Mg—Al system hydrotalcite containing Mg 2+ as divalent metal ions and Al 3+ as trivalent metal ions. Some or all of these metal ions may be substituted with other metal ions.
- the hydrotalcite powder used in this embodiment contains plate-like particles.
- the average plate surface diameter is 0.01 to 1.0 ⁇ m, preferably 0.02 to 0.8 ⁇ m, more preferably 0.03 to 0.7 ⁇ m. If the average plate surface diameter is less than 0.01 ⁇ m, the dispersibility in the resin is insufficient. If it exceeds 1.0 ⁇ m, it is difficult to industrially produce plate-like particles.
- the BET specific surface area of the hydrotalcite powder used in this embodiment is preferably 1 to 150 m 2 /g, more preferably 5 to 100 m 2 /g, still more preferably 8 to 50 m 2 /g.
- Hydrotalcite particles having a BET specific surface area of less than 1 m 2 /g are difficult to obtain industrially. When the BET specific surface area exceeds 150 m 2 /g, aggregation of particles becomes severe. As a result, it becomes difficult to uniformly disperse the particles in the resin.
- the hydrotalcite powder used in the present embodiment if necessary, has a particle surface containing at least one selected from higher fatty acids, anionic surfactants, higher fatty acid phosphates, coupling agents, and polyhydric alcohol esters. It may be coated with a surface treatment agent. Coating with a surface coating improves the dispersibility of the hydrotalcite powder in the resin.
- the hydrotalcite powder used in this embodiment can be produced by a conventional method.
- the mixture prepared by mixing a magnesium compound and an aluminum compound is calcined, and then the Mg—Al composite oxide thus obtained is hydrated with an anion-containing aqueous solution. is mentioned.
- a calcium salt aqueous solution is added to a mixed aqueous solution prepared by mixing an anion-containing alkaline aqueous solution, a magnesium salt aqueous solution, and an aluminum salt aqueous solution, and then the resulting calcium salt is added.
- a hydrotalcite powder can be obtained by a method of heating and aging an aqueous solution containing the hydrotalcite.
- the PPS resin used in this embodiment is not particularly limited, it preferably has an average molecular weight of 10,000 to 100,000.
- a low-molecular-weight PPS resin When a low-molecular-weight PPS resin is used, the moldability of the composition for injection molding is excellent due to its low melt viscosity, but physical properties such as strength may be inferior.
- a high-molecular-weight PPS resin When a high-molecular-weight PPS resin is used, its physical properties are excellent due to its high melt viscosity, but if the amount of magnetic powder loaded is high, moldability may be poor.
- the melt viscosity of the PPS resin can be appropriately set according to the magnetic powder.
- a preferred melt viscosity is in the range of 5 to 200 Pa ⁇ s at 310°C. If the melt viscosity at 310° C. is less than 5 to Pa ⁇ s, the resulting resin composition for bonded magnets may have reduced mechanical strength. On the other hand, when the melt viscosity at 310° C. exceeds 200 Pa ⁇ s, the fluidity of the resin composition for bonded magnets is significantly reduced. And injection molding may become difficult.
- the molecular structure of the PPS resin there are no particular restrictions on the molecular structure of the PPS resin. That is, its molecular structure may be, for example, either a crosslinked type or a linear type. Various elastomers such as rubber or elastic resin may be blended with the PPS resin, if necessary.
- the content of hydrotalcite powder in the resin composition for bonded magnets according to the present embodiment is 0.1 to 25.0% by weight with respect to the PPS resin. If the content of the hydrotalcite powder is less than 0.1% by weight relative to the PPS resin, the effect of reducing corrosive gas is not sufficient. If the content of hydrotalcite powder exceeds 25.0% by weight based on the PPS resin, the mechanical properties, magnetic properties and fluidity are degraded.
- the content of hydrotalcite powder with respect to the PPS resin is more preferably 0.5-15.0% by weight, still more preferably 1.0-5.0% by weight.
- the resin composition for bonded magnets according to the present embodiment preferably contains 0.01 to 4.0% by weight of hydrotalcite powder. If the content of the hydrotalcite powder is less than 0.01% by weight, the effect of reducing corrosive gas is not sufficient. If the content of hydrotalcite powder exceeds 4.0% by weight, the non-magnetic component increases. This may result in deterioration of mechanical properties, magnetic properties, and fluidity.
- the content of hydrotalcite powder is preferably 0.10-2.5% by weight, more preferably 0.20-1.0% by weight.
- the resin composition for bonded magnets according to the present embodiment preferably contains 5 to 30% by weight of PPS resin. If the content of the PPS resin is less than 5% by weight, the bonded magnet resin composition may not have sufficient fluidity. In that case, it becomes difficult to obtain a good molded product. If the PPS resin content exceeds 30% by weight, the magnetic properties may deteriorate.
- the content of the PPS resin is more preferably 7-25% by weight, still more preferably 10-20% by weight.
- the content of magnetic powder in the resin composition for bonded magnets is preferably 69.65 to 94.53% by weight. If the magnetic powder content is less than 69.65% by weight, the required magnetic properties may not be obtained. If the content of the magnetic powder exceeds 94.53% by weight, the mechanical strength of the resulting bonded magnet may be lowered, and moldability such as fluidity and recyclability may be extremely lowered.
- the magnetic powder content is more preferably 74.63 to 92.54 wt%, still more preferably 79.60 to 89.55 wt%.
- the residual magnetic flux density Br of the resin composition for a bonded magnet according to this embodiment is preferably 230 mT (2300 G) or more, more preferably 245 mT (2450 G) or more when the ferrite particle powder is used as the magnetic powder.
- This residual magnetic flux density Br can be obtained by a magnetism measuring method described later.
- the coercive force iHc is preferably 119-279 kA/m (1500-3500 Oe), more preferably 127-259 kA/m (1600-3250 Oe).
- the maximum energy product (BH)max is preferably 10.3 kJ/m 3 (1.30 MGOe) or more, more preferably 10.7 kJ/m 3 (1.35 MGOe) or more.
- the residual magnetic flux density Br of the resin composition for a bonded magnet according to this embodiment is preferably 300 mT (3000 G) or more, more preferably 350 mT (3500 G) or more when the rare earth magnetic powder is used as the magnetic powder.
- the coercive force iHc is preferably 636-955 kA/m (8000-12000 Oe), more preferably 676-915 kA/m (8500-11500 Oe).
- the maximum energy product (BH) max is preferably 15.9 kJ/m 3 (2.00 MGOe) or more, more preferably 19.9 kJ/m 3 (2.50 MGOe) or more.
- the resin composition for bonded magnets according to the present embodiment can be obtained by a known method for producing resin compositions for bonded magnets. For example, first, the magnetic powder, the PPS resin component, and the hydrotalcite powder are uniformly mixed, and then melt-kneaded using a kneading extruder or the like. Then, the resulting kneaded product is pulverized or cut into granules or pellets to obtain a resin composition for a bond magnet.
- the resin composition for a bonded magnet according to the present embodiment contains plastic molding lubricants and various stabilizers as appropriate in order to obtain the effects of improving moldability, improving heat resistance, preventing oxidative deterioration, and preventing rust. may be contained.
- lubricants include saturated and unsaturated fatty acids such as propionic acid, stearic acid, linoleic acid, oleic acid, malonic acid, glutaric acid, adipic acid, maleic acid, and fumaric acid, and derivatives thereof.
- derivatives include metal soaps such as calcium stearate, magnesium stearate, and lithium stearate, and fatty acid amides such as hydroxydistearic acid amide, ethylenebislauric acid amide, and ethylenebisoleic acid amide.
- Other examples include waxes such as paraffin wax, polysiloxanes such as dimethylpolysiloxane and silicone oil, and fluorine compounds such as fluorine-containing oil.
- an antioxidant is preferably added in order to suppress deterioration due to heat.
- antioxidants include hindered amine stabilizers.
- Other examples include hindered/reshindered phenolic antioxidants such as pentaerythrityl-tetrakis[3-(3,5-di-t-butyl-4-hydroxyphenyl)propionate], N,N'-bis Metal deactivators such as [3-(3,5-di-t-butyl-4-hydroxyphenyl)propionylhydrazine, phosphite antioxidants, and thioether antioxidants can be mentioned.
- a combination of a hindered/reshindered phenol antioxidant and a phosphite antioxidant or metal deactivator is effective.
- the antioxidant is preferably contained in the range of 0.1-1.0 wt%, more preferably 0.2-0.8 wt%, relative to the total amount of the resin composition.
- a known release agent such as zinc stearate or calcium stearate can be added to the resin as needed.
- a molding method for obtaining a molded product using the resin composition for a bonded magnet according to this embodiment is not particularly limited. Transfer method, injection method, extrusion method, inflation method, calendering method, T-die method, blowing method, vacuum method, lamination method, etc., depending on the material properties, molding purpose, and application of the resin composition for bonded magnets. , spray-up method, foaming method, matched die method, and SMC method can be used. Moreover, among these methods, a plurality of methods can be used in combination. Injection method or extrusion method is particularly preferred for molding a bonded magnet resin composition using a thermoplastic resin. These molding methods are applied to many industrial parts. These molding methods also enable continuous, high-speed, and mass production.
- the average particle size of the ferrite particle powder used in this embodiment was measured using "Sub-Sieve Sizer Model 95" (manufactured by Fisher Scientific).
- the BET specific surface area of the ferrite particle powder used in this embodiment was measured using a "fully automatic specific surface area meter Macsorb model-1201" (manufactured by Mountech Co., Ltd.).
- the plate surface diameter of the hydrotalcite powder was measured from the transmission electron micrograph of the observation sample. The average value of the measured values was defined as the average plate surface diameter of the hydrotalcite powder.
- the transmission electron microscope used is "JEM-1200EX II (manufactured by JEOL)".
- a solution containing hydrotalcite powder dispersed in water or alcohol was poured onto the mesh.
- An observation sample was prepared by drying the particles adhering to the mesh. Particles (200 points) in which the plate surface was horizontally attached to the mesh were selected in the observation sample. Platelet diameters of selected particles were measured.
- the BET specific surface area value of the hydrotalcite powder was measured using "Monosorb MS-21 (manufactured by QUANTA CHROME)".
- the amount of corrosive gas generated from the resin composition for bonded magnets was measured by the following method.
- 1 g of the bond magnet resin composition is heated for 10 minutes at a setting of 350° C. (atmospheric atmosphere) using a desktop high-temperature tubular furnace TSS-430-P manufactured by Yamada Denki Co., Ltd. generated gas. Only the generated gas was introduced into a tubular furnace set at 1000° C. and burned.
- the generated gas thus ionized was absorbed in two sets of absorbent (absorbent solution composition: 0.05 M NaOH + 0.06% H 2 O 2 aqueous solution 20 ml/set). Thereafter, using the absorbent diluted to 100 mL, Cl ⁇ and SO 4 2 ⁇ were quantified by ion chromatography Dionex Integrion HPIC manufactured by Thermo Fisher Scientific.
- the molding density of the resin composition for bond magnets was obtained using an "Electronic Hydrometer EW-120SG" (manufactured by Yasuda Seiki Seisakusho Co., Ltd.). Specifically, the molding density of a core obtained by molding a melted bond magnet resin composition in a mold having a diameter of 25 mm and a height of 10.5 mm was measured with an electronic hydrometer.
- the melt mass flow rate (MFR) of the bonded magnet composition was obtained by measuring the bonded magnet composition melted at 330°C with a load of 10 kg in accordance with JIS K7210.
- the magnetic properties (residual magnetic flux density Br, coercive force iHc, coercive force bHc, maximum energy product (BH)max) of the bond magnet resin composition were obtained by the following method. First, a bond magnet resin composition was melted in a mold having a diameter of 25 mm and a height of 10.5 mm, and then magnetically oriented at 716.2 kA/m (9 kOe). After that, the magnetic properties of the resin composition for bond magnets were measured in a magnetic field of 1114.1 kA/m (14 kOe) using a "direct current magnetization property automatic recorder 3257" (manufactured by Yokogawa Hokushin Electric Co., Ltd.). .
- a test specimen molded body having a total length of 80 mm, a total width of 12.7 mm, and a thickness of 3.2 mm was obtained by injection molding the bond magnet resin composition. Based on the recorded injection pressure during injection molding of the test piece, the injection property of the resin composition for a bonded magnet was determined.
- the flexural strength and IZOD impact strength of molded articles using the resin composition for bond magnets were measured according to ASTM D790 and D256 standards. More specifically, an injection molding machine J55AD manufactured by The Japan Steel Works, Ltd. was used to obtain molded test pieces. After that, computer measurement control type precision universal testing machine AG-1 type manufactured by Shimadzu Corporation and NO. 158 was used to measure the flexural strength and IZOD impact strength of test compacts.
- Example 1 83.57 parts by weight of ferrite particle powder (average particle diameter 1.20 ⁇ m, BET value: 1.75 m 2 /g, coercive force 226 kA/m (2850 Oe), saturation magnetization 822 Am 2 /kg (72 emu/g)), amino 0.42 parts by weight of an alkyl-based silane coupling agent was added. The resulting mixture was warm mixed at 120° C. until uniform. Thus, surface-treated ferrite particle powder was obtained.
- ferrite particle powder average particle diameter 1.20 ⁇ m, BET value: 1.75 m 2 /g, coercive force 226 kA/m (2850 Oe), saturation magnetization 822 Am 2 /kg (72 emu/g)
- a fixed amount of the obtained mixture of the resin composition for a bonded magnet was fed to a twin-screw kneader and kneaded at a temperature at which the PPS resin melted.
- the kneaded material was taken out in the form of strands and cut into pellets having a size of 2 mm ⁇ 3 mm.
- a resin composition for a bonded magnet was obtained.
- Examples 2-3, Comparative Examples 1-2 A bonded magnet resin composition was prepared in the same manner as in Example 1, except that the ferrite magnetic powder, PPS resin, and hydrotalcite powder formulations were changed as shown in Table 1.
- Example 4 A bond magnet resin was prepared in the same manner as in Example 2, except that the hydrotalcite powder was changed to Mg—Al hydrotalcite powder having an average plate surface diameter of 0.06 ⁇ m and a BET value of 40 m 2 /g. A composition was prepared.
- the resin composition for bonded magnets according to the present embodiment has superior corrosive gas reduction characteristics to the resin composition for bonded magnets of Comparative Example 1, which does not contain hydrotalcite powder.
- the resin composition for a bonded magnet of Comparative Example 2 exhibited a high injection pressure and a decrease in bending strength and IZOD impact strength of the molded body.
- the resin composition for a bonded magnet according to the present embodiment it is possible to obtain a molded article that can reduce the generation of corrosive gas while maintaining high magnetic properties and physical properties. Therefore, the resin composition for bonded magnets according to this embodiment can be suitably used as a material for bonded magnets.
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Abstract
Description
フェライト粒子粉末83.57重量部(平均粒子径1.20μm、BET値:1.75m2/g、保磁力226kA/m(2850Oe)、飽和磁化822Am2/kg(72emu/g))に、アミノアルキル系シランカップリング剤0.42重量部が添加された。得られた混合物が、均一になるまで、120℃で加温混合された。このようにして、表面処理フェライト粒子粉末が得られた。この表面処理フェライト粒子粉末に、PPS樹脂(平均分子量:41000、溶融粘度:310℃において60Pa・s)15.80重量部と、Mg-Al系ハイドロタルサイト粉末(平均板面径:0.24μm、BET値:11m2/g)0.21重量部と、が添加された。得られた混合物をヘンシェルミキサーで充分に混合することにより、ボンド磁石用樹脂組成物の混合物が得られた。
フェライト磁性粉、PPS樹脂、及びハイドロタルサイト粉末の配合を表1の記載のとおりに変更したこと以外は、前記実施例1と同様にして、ボンド磁石用樹脂組成物が調製された。
ハイドロタルサイト粉末を、平均板面径:0.06μm、BET値:40m2/gのMg-Al系ハイドロタルサイト粉末に変更したこと以外は、実施例2と同様にして、ボンド磁石用樹脂組成物が調製された。
Claims (5)
- 磁性粉末、PPS樹脂、及びハイドロタルサイト粉末を含み、
PPS樹脂に対してハイドロタルサイトを0.1~25.0重量%含有する、
ボンド磁石用樹脂組成物。 - PPS樹脂を5~30重量%含有する、
請求項1記載のボンド磁石用樹脂組成物。 - ハイドロタルサイトを0.01~4.0重量%含有する、
請求項1又は2記載のボンド磁石用樹脂組成物。 - 前記ハイドロタルサイト粉末が、Mg-Al系ハイドロタルサイトである、
請求項1又は2記載のボンド磁石用樹脂組成物。 - 請求項1又は2記載のボンド磁石用樹脂組成物を用いて成形された成形体。
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JPH0444304A (ja) | 1990-06-12 | 1992-02-14 | Sumitomo Bakelite Co Ltd | プラスチック磁石組成物 |
JPH08293408A (ja) * | 1995-04-21 | 1996-11-05 | Dainippon Ink & Chem Inc | プラスチック磁性材料組成物及びその磁石 |
JP2002080715A (ja) * | 2000-06-30 | 2002-03-19 | Mitsubishi Engineering Plastics Corp | 難燃性樹脂製磁石用組成物および難燃性樹脂製磁石 |
JP2003142309A (ja) * | 2001-11-08 | 2003-05-16 | Sumitomo Metal Mining Co Ltd | 樹脂結合型磁石用組成物及びそれを用いてなる樹脂結合型磁石 |
JP2010518182A (ja) * | 2007-02-09 | 2010-05-27 | 株式会社日本触媒 | シラン化合物、その製造方法及びシラン化合物を含む樹脂組成物 |
JP2013077802A (ja) | 2011-09-17 | 2013-04-25 | Tdk Corp | ボンド磁石用コンパウンド、及び、ボンド磁石 |
JP2015076572A (ja) | 2013-10-11 | 2015-04-20 | 日亜化学工業株式会社 | ボンド磁石用樹脂組成物及びそれを用いたボンド磁石 |
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Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH0444304A (ja) | 1990-06-12 | 1992-02-14 | Sumitomo Bakelite Co Ltd | プラスチック磁石組成物 |
JPH08293408A (ja) * | 1995-04-21 | 1996-11-05 | Dainippon Ink & Chem Inc | プラスチック磁性材料組成物及びその磁石 |
JP2002080715A (ja) * | 2000-06-30 | 2002-03-19 | Mitsubishi Engineering Plastics Corp | 難燃性樹脂製磁石用組成物および難燃性樹脂製磁石 |
JP2003142309A (ja) * | 2001-11-08 | 2003-05-16 | Sumitomo Metal Mining Co Ltd | 樹脂結合型磁石用組成物及びそれを用いてなる樹脂結合型磁石 |
JP2010518182A (ja) * | 2007-02-09 | 2010-05-27 | 株式会社日本触媒 | シラン化合物、その製造方法及びシラン化合物を含む樹脂組成物 |
JP2013077802A (ja) | 2011-09-17 | 2013-04-25 | Tdk Corp | ボンド磁石用コンパウンド、及び、ボンド磁石 |
JP2015076572A (ja) | 2013-10-11 | 2015-04-20 | 日亜化学工業株式会社 | ボンド磁石用樹脂組成物及びそれを用いたボンド磁石 |
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