WO2021182589A1 - 成形体用芳香族ポリイミド粉体、それを用いた成形体、及び成形体の機械的強度向上方法 - Google Patents
成形体用芳香族ポリイミド粉体、それを用いた成形体、及び成形体の機械的強度向上方法 Download PDFInfo
- Publication number
- WO2021182589A1 WO2021182589A1 PCT/JP2021/009928 JP2021009928W WO2021182589A1 WO 2021182589 A1 WO2021182589 A1 WO 2021182589A1 JP 2021009928 W JP2021009928 W JP 2021009928W WO 2021182589 A1 WO2021182589 A1 WO 2021182589A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- aromatic polyimide
- polyimide powder
- molded product
- powder
- aromatic
- Prior art date
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- 125000003118 aryl group Chemical group 0.000 title claims abstract description 275
- 239000004642 Polyimide Substances 0.000 title claims abstract description 274
- 229920001721 polyimide Polymers 0.000 title claims abstract description 274
- 239000000843 powder Substances 0.000 title claims abstract description 217
- 238000000034 method Methods 0.000 title claims description 51
- 238000005452 bending Methods 0.000 claims description 27
- 238000004140 cleaning Methods 0.000 claims description 26
- 238000004519 manufacturing process Methods 0.000 claims description 26
- 238000001035 drying Methods 0.000 claims description 22
- 238000000465 moulding Methods 0.000 claims description 19
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 10
- 239000002994 raw material Substances 0.000 claims description 10
- 238000005406 washing Methods 0.000 claims description 8
- 239000002904 solvent Substances 0.000 description 30
- 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 description 28
- 238000002360 preparation method Methods 0.000 description 21
- -1 aromatic tetracarboxylic acid Chemical class 0.000 description 20
- 239000012298 atmosphere Substances 0.000 description 16
- 238000006243 chemical reaction Methods 0.000 description 15
- 150000004984 aromatic diamines Chemical class 0.000 description 14
- 229920005575 poly(amic acid) Polymers 0.000 description 14
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 12
- SECXISVLQFMRJM-UHFFFAOYSA-N N-Methylpyrrolidone Chemical compound CN1CCCC1=O SECXISVLQFMRJM-UHFFFAOYSA-N 0.000 description 12
- 125000001424 substituent group Chemical group 0.000 description 12
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 11
- 150000004985 diamines Chemical class 0.000 description 11
- 239000007788 liquid Substances 0.000 description 11
- 239000000126 substance Substances 0.000 description 11
- 239000012299 nitrogen atmosphere Substances 0.000 description 9
- 238000005245 sintering Methods 0.000 description 9
- 150000000000 tetracarboxylic acids Chemical class 0.000 description 9
- FYYYKXFEKMGYLZ-UHFFFAOYSA-N 4-(1,3-dioxo-2-benzofuran-5-yl)-2-benzofuran-1,3-dione Chemical compound C=1C=C2C(=O)OC(=O)C2=CC=1C1=CC=CC2=C1C(=O)OC2=O FYYYKXFEKMGYLZ-UHFFFAOYSA-N 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 8
- 238000000748 compression moulding Methods 0.000 description 8
- 239000002245 particle Substances 0.000 description 8
- 125000002023 trifluoromethyl group Chemical group FC(F)(F)* 0.000 description 8
- CBCKQZAAMUWICA-UHFFFAOYSA-N 1,4-phenylenediamine Chemical compound NC1=CC=C(N)C=C1 CBCKQZAAMUWICA-UHFFFAOYSA-N 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 230000001771 impaired effect Effects 0.000 description 7
- 239000011261 inert gas Substances 0.000 description 7
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 6
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- 150000008064 anhydrides Chemical class 0.000 description 6
- MTZQAGJQAFMTAQ-UHFFFAOYSA-N ethyl benzoate Chemical compound CCOC(=O)C1=CC=CC=C1 MTZQAGJQAFMTAQ-UHFFFAOYSA-N 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- 239000000178 monomer Substances 0.000 description 6
- 239000003960 organic solvent Substances 0.000 description 6
- 230000001376 precipitating effect Effects 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000945 filler Substances 0.000 description 5
- 238000001914 filtration Methods 0.000 description 5
- 238000010304 firing Methods 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- VLDPXPPHXDGHEW-UHFFFAOYSA-N 1-chloro-2-dichlorophosphoryloxybenzene Chemical compound ClC1=CC=CC=C1OP(Cl)(Cl)=O VLDPXPPHXDGHEW-UHFFFAOYSA-N 0.000 description 4
- HLBLWEWZXPIGSM-UHFFFAOYSA-N 4-Aminophenyl ether Chemical compound C1=CC(N)=CC=C1OC1=CC=C(N)C=C1 HLBLWEWZXPIGSM-UHFFFAOYSA-N 0.000 description 4
- CQMIJLIXKMKFQW-UHFFFAOYSA-N 4-phenylbenzene-1,2,3,5-tetracarboxylic acid Chemical compound OC(=O)C1=C(C(O)=O)C(C(=O)O)=CC(C(O)=O)=C1C1=CC=CC=C1 CQMIJLIXKMKFQW-UHFFFAOYSA-N 0.000 description 4
- JJJDAERKXDTMPH-UHFFFAOYSA-N 5-(4-phenylphenyl)benzene-1,2,3,4-tetracarboxylic acid Chemical compound OC(=O)C1=C(C(O)=O)C(C(=O)O)=CC(C=2C=CC(=CC=2)C=2C=CC=CC=2)=C1C(O)=O JJJDAERKXDTMPH-UHFFFAOYSA-N 0.000 description 4
- 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 4
- 238000000354 decomposition reaction Methods 0.000 description 4
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- 239000000203 mixture Substances 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-UHFFFAOYSA-N Propylene glycol Chemical compound CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000000654 additive Substances 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 125000004432 carbon atom Chemical group C* 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
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- 230000002542 deteriorative effect Effects 0.000 description 3
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- 230000004580 weight loss Effects 0.000 description 3
- WZCQRUWWHSTZEM-UHFFFAOYSA-N 1,3-phenylenediamine Chemical compound NC1=CC=CC(N)=C1 WZCQRUWWHSTZEM-UHFFFAOYSA-N 0.000 description 2
- SPSWJTZNOXMMMV-UHFFFAOYSA-N 2,3,5,6-tetrafluoroaniline Chemical compound NC1=C(F)C(F)=CC(F)=C1F SPSWJTZNOXMMMV-UHFFFAOYSA-N 0.000 description 2
- FVFYRXJKYAVFSB-UHFFFAOYSA-N 2,3,5,6-tetrafluorobenzene-1,4-diamine Chemical compound NC1=C(F)C(F)=C(N)C(F)=C1F FVFYRXJKYAVFSB-UHFFFAOYSA-N 0.000 description 2
- FXGQUGCFZKMIJW-UHFFFAOYSA-N 2,4,5,6-tetrafluorobenzene-1,3-diamine Chemical compound NC1=C(F)C(N)=C(F)C(F)=C1F FXGQUGCFZKMIJW-UHFFFAOYSA-N 0.000 description 2
- VOZKAJLKRJDJLL-UHFFFAOYSA-N 2,4-diaminotoluene Chemical compound CC1=CC=C(N)C=C1N VOZKAJLKRJDJLL-UHFFFAOYSA-N 0.000 description 2
- ZGDMDBHLKNQPSD-UHFFFAOYSA-N 2-amino-5-(4-amino-3-hydroxyphenyl)phenol Chemical group C1=C(O)C(N)=CC=C1C1=CC=C(N)C(O)=C1 ZGDMDBHLKNQPSD-UHFFFAOYSA-N 0.000 description 2
- QRUWUSOUUMPANJ-UHFFFAOYSA-N 2-amino-5-[(4-amino-3-carboxyphenyl)methyl]benzoic acid Chemical compound C1=C(C(O)=O)C(N)=CC=C1CC1=CC=C(N)C(C(O)=O)=C1 QRUWUSOUUMPANJ-UHFFFAOYSA-N 0.000 description 2
- GWHLJVMSZRKEAQ-UHFFFAOYSA-N 3-(2,3-dicarboxyphenyl)phthalic acid Chemical compound OC(=O)C1=CC=CC(C=2C(=C(C(O)=O)C=CC=2)C(O)=O)=C1C(O)=O GWHLJVMSZRKEAQ-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
- FWOLORXQTIGHFX-UHFFFAOYSA-N 4-(4-amino-2,3,5,6-tetrafluorophenyl)-2,3,5,6-tetrafluoroaniline Chemical group FC1=C(F)C(N)=C(F)C(F)=C1C1=C(F)C(F)=C(N)C(F)=C1F FWOLORXQTIGHFX-UHFFFAOYSA-N 0.000 description 2
- LSJAPRRUOIMQSN-UHFFFAOYSA-N 4-(4-amino-2-fluorophenyl)-3-fluoroaniline Chemical compound FC1=CC(N)=CC=C1C1=CC=C(N)C=C1F LSJAPRRUOIMQSN-UHFFFAOYSA-N 0.000 description 2
- DXPDSWSYCBNHTO-UHFFFAOYSA-N 4-[4-(3,4-dicarboxy-2,5,6-trifluorophenoxy)-2,3,5,6-tetrafluorophenoxy]-3,5,6-trifluorophthalic acid Chemical compound FC1=C(C(O)=O)C(C(=O)O)=C(F)C(F)=C1OC(C(=C1F)F)=C(F)C(F)=C1OC1=C(F)C(F)=C(C(O)=O)C(C(O)=O)=C1F DXPDSWSYCBNHTO-UHFFFAOYSA-N 0.000 description 2
- NVKGJHAQGWCWDI-UHFFFAOYSA-N 4-[4-amino-2-(trifluoromethyl)phenyl]-3-(trifluoromethyl)aniline Chemical group FC(F)(F)C1=CC(N)=CC=C1C1=CC=C(N)C=C1C(F)(F)F NVKGJHAQGWCWDI-UHFFFAOYSA-N 0.000 description 2
- 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 2
- QQPYIXJPRJQUDC-UHFFFAOYSA-N 5-(3-phenylphenyl)benzene-1,2,3,4-tetracarboxylic acid Chemical compound OC(=O)C1=C(C(O)=O)C(C(=O)O)=CC(C=2C=C(C=CC=2)C=2C=CC=CC=2)=C1C(O)=O QQPYIXJPRJQUDC-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 125000003277 amino group Chemical group 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 125000002029 aromatic hydrocarbon group Chemical group 0.000 description 2
- UHOVQNZJYSORNB-UHFFFAOYSA-N benzene Substances C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 2
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical compound C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 2
- 239000012965 benzophenone Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 125000000219 ethylidene group Chemical group [H]C(=[*])C([H])([H])[H] 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 125000001153 fluoro group Chemical group F* 0.000 description 2
- 150000004678 hydrides Chemical class 0.000 description 2
- 229940018564 m-phenylenediamine Drugs 0.000 description 2
- 125000000962 organic group Chemical group 0.000 description 2
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 2
- WQGWDDDVZFFDIG-UHFFFAOYSA-N pyrogallol Chemical compound OC1=CC=CC(O)=C1O WQGWDDDVZFFDIG-UHFFFAOYSA-N 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 125000006158 tetracarboxylic acid group Chemical group 0.000 description 2
- 238000002411 thermogravimetry Methods 0.000 description 2
- AVQQQNCBBIEMEU-UHFFFAOYSA-N 1,1,3,3-tetramethylurea Chemical compound CN(C)C(=O)N(C)C AVQQQNCBBIEMEU-UHFFFAOYSA-N 0.000 description 1
- CYSGHNMQYZDMIA-UHFFFAOYSA-N 1,3-Dimethyl-2-imidazolidinon Chemical compound CN1CCN(C)C1=O CYSGHNMQYZDMIA-UHFFFAOYSA-N 0.000 description 1
- ZFPGARUNNKGOBB-UHFFFAOYSA-N 1-Ethyl-2-pyrrolidinone Chemical compound CCN1CCCC1=O ZFPGARUNNKGOBB-UHFFFAOYSA-N 0.000 description 1
- NOGFHTGYPKWWRX-UHFFFAOYSA-N 2,2,6,6-tetramethyloxan-4-one Chemical compound CC1(C)CC(=O)CC(C)(C)O1 NOGFHTGYPKWWRX-UHFFFAOYSA-N 0.000 description 1
- FALRKNHUBBKYCC-UHFFFAOYSA-N 2-(chloromethyl)pyridine-3-carbonitrile Chemical compound ClCC1=NC=CC=C1C#N FALRKNHUBBKYCC-UHFFFAOYSA-N 0.000 description 1
- NBAUUNCGSMAPFM-UHFFFAOYSA-N 3-(3,4-dicarboxyphenyl)phthalic acid Chemical compound C1=C(C(O)=O)C(C(=O)O)=CC=C1C1=CC=CC(C(O)=O)=C1C(O)=O NBAUUNCGSMAPFM-UHFFFAOYSA-N 0.000 description 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000004566 IR spectroscopy Methods 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-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
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 1
- LGRFSURHDFAFJT-UHFFFAOYSA-N Phthalic anhydride Natural products C1=CC=C2C(=O)OC(=O)C2=C1 LGRFSURHDFAFJT-UHFFFAOYSA-N 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- RJDOZRNNYVAULJ-UHFFFAOYSA-L [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[F-].[F-].[Mg++].[Mg++].[Mg++].[Al+3].[Si+4].[Si+4].[Si+4].[K+] Chemical compound [O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[O--].[F-].[F-].[Mg++].[Mg++].[Mg++].[Al+3].[Si+4].[Si+4].[Si+4].[K+] RJDOZRNNYVAULJ-UHFFFAOYSA-L 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 150000001298 alcohols Chemical class 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229920006231 aramid fiber Polymers 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 229910052796 boron Inorganic materials 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
- JHIWVOJDXOSYLW-UHFFFAOYSA-N butyl 2,2-difluorocyclopropane-1-carboxylate Chemical compound CCCCOC(=O)C1CC1(F)F JHIWVOJDXOSYLW-UHFFFAOYSA-N 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 150000001244 carboxylic acid anhydrides Chemical class 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000007809 chemical reaction catalyst Substances 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000003398 denaturant Substances 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000012765 fibrous filler Substances 0.000 description 1
- ANSXAPJVJOKRDJ-UHFFFAOYSA-N furo[3,4-f][2]benzofuran-1,3,5,7-tetrone Chemical compound C1=C2C(=O)OC(=O)C2=CC2=C1C(=O)OC2=O ANSXAPJVJOKRDJ-UHFFFAOYSA-N 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- GXMIHVHJTLPVKL-UHFFFAOYSA-N n,n,2-trimethylpropanamide Chemical compound CC(C)C(=O)N(C)C GXMIHVHJTLPVKL-UHFFFAOYSA-N 0.000 description 1
- MBHINSULENHCMF-UHFFFAOYSA-N n,n-dimethylpropanamide Chemical compound CCC(=O)N(C)C MBHINSULENHCMF-UHFFFAOYSA-N 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 239000012766 organic filler Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- WYVAMUWZEOHJOQ-UHFFFAOYSA-N propionic anhydride Chemical compound CCC(=O)OC(=O)CC WYVAMUWZEOHJOQ-UHFFFAOYSA-N 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000013557 residual solvent Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 229940014800 succinic anhydride Drugs 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- C08G73/1067—Wholly aromatic polyimides, i.e. having both tetracarboxylic and diamino moieties aromatically bound
-
- 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
- C08G73/1042—Copolyimides derived from at least two different tetracarboxylic compounds or two different diamino compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
- C08J3/14—Powdering or granulating by precipitation from solutions
-
- 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
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2379/00—Characterised by the use 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 C08J2361/00 - C08J2377/00
- C08J2379/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08J2379/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
Definitions
- the present invention relates to a polyimide powder for a molded body in which the mechanical properties of the molded body are improved, a molded body using the polyimide powder, and a method for improving the mechanical strength of the molded body.
- Aromatic polyimide obtained by using an aromatic tetracarboxylic acid component and an aromatic diamine component as main raw materials has excellent properties such as heat resistance, mechanical strength, electrical properties, and solvent resistance, and is used for electrical and electronic parts, etc. It is widely used as a material for.
- the aromatic polyimide powder processed into powder can be used as a material for manufacturing parts of industrial manufacturing equipment because a desired molded product can be obtained by filling a mold with pressure or the like. Widely used.
- Patent Document 1 discloses a method of mixing polyimide powder and conductive carbon in order to obtain a molded product to be used for electrical and electronic parts.
- Patent Document 2 discloses a method of mixing a polyimide powder, an inorganic fibrous filler, and a solid lubricant in order to impart abrasion resistance and mechanical strength.
- Patent Document 3 discloses a method of mixing the polyimide powder and the fluorine-containing resin powder in order to improve the handleability of the polyimide powder.
- Patent Document 4 discloses the use of soluble polyimide.
- Patent Document 5 discloses a method of containing a fluorine functional group such as 2-hydroxy-1,1,1,3,3,3-hexafluoroisopropyl group.
- JP-A-2007-016222 Japanese Unexamined Patent Publication No. 62-0132960 International Publication No. 2015/005271 Japanese Unexamined Patent Publication No. 2019-059835 Japanese Unexamined Patent Publication No. 2019-08998
- an object of the present invention is to provide an aromatic polyimide powder that can maximize the characteristics of the aromatic polyimide powder.
- an object of the present invention is to provide an aromatic polyimide powder that can be molded into an aromatic polyimide molded body having excellent mechanical properties.
- Another object of the present invention is to provide a method for improving the mechanical properties of an aromatic polyimide molded product in order to obtain a molded product having excellent mechanical properties.
- the present invention particularly relates to the following items.
- 1. It is an aromatic polyimide powder for a molded body, and the content of the volatile component contained in the aromatic polyimide powder for a molded body is 0.50 to 100% by mass of the aromatic polyimide powder at 25 ° C.
- Aromatic polyimide powder for molded products in an amount of 5.00% by mass.
- the aromatic polyimide powder for a molded body of the present invention preferably has a bending strength of 60 MPa or more in the aromatic polyimide molded body obtained by molding the aromatic polyimide powder for a molded body of the present invention.
- the method for producing an aromatic polyimide powder for a molded product according to 2.1 wherein the ratio of the total amount of volatile components of the aromatic polyimide powder is 0 with respect to 100% by mass of the aromatic polyimide powder at 25 ° C.
- a method for producing an aromatic polyimide powder for a molded product which comprises a volatile component adjusting step for adjusting the amount in the range of 50 to 5.00% by mass.
- a method for producing an aromatic polyimide powder for a molded product, wherein the volatile component adjusting step according to 3.2 includes a washing step and / or a drying step.
- a method for producing an aromatic polyimide powder for a molded product, wherein the cleaning step according to 4.3 includes a cleaning step with alcohol.
- An aromatic polyimide molded product having a bending strength of 60 MPa or more which is obtained by molding the aromatic polyimide powder for a molded product according to 5.1. 6.
- the present invention can provide an aromatic polyimide powder and a method for producing the same, which makes it possible to realize an aromatic polyimide molded product having excellent mechanical properties without deteriorating solvent resistance. Furthermore, it is possible to provide a method for improving the mechanical properties of the aromatic polyimide molded product. According to the present invention, an aromatic polyimide powder capable of significantly improving the mechanical strength of a molded product can be obtained by a simple method of adjusting the content of volatile components, which is industrially epoch-making. Invention.
- the aromatic polyimide powder for a molded product of the present invention contains 0.50 to 5.00% by mass of a volatile component.
- the "volatile component” means a component that volatilizes in a temperature range of 50 to 350 ° C.
- the present invention is characterized in that this volatile component is contained in an amount of 0.50 to 5.00% by mass with respect to 100% by mass of the aromatic polyimide powder at 25 ° C. That is, for example, when the amount of the component volatilized in the temperature range of 50 to 350 ° C.
- the aromatic polyimide powder for the molded body is mainly composed of the aromatic polyimide powder. , 99.00% by mass of the component that does not volatilize in the temperature range of 50 to 350 ° C., and 1.00% by mass of the component that volatilizes in the temperature range of 50 to 350 ° C.
- the method for measuring the content of the "volatile component” can be measured by a thermogravimetric analysis method or the like, which is a known analytical method.
- thermogravimetric analysis a volatile component volatilized at 50 ° C. to 350 ° C. by raising a predetermined amount of aromatic polyimide powder to a temperature exceeding 350 ° C. at a heating rate of 20 ° C./min.
- the total amount of the above may be measured, and the ratio of the total amount to the predetermined amount of the aromatic polyimide powder may be calculated.
- the weight of the aromatic polyimide powder means the weight measured at 25 ° C. If the amount of the component that volatilizes in the temperature range of 50 to 350 ° C. can be measured, another analysis method may be applied.
- volatile components examples include monomer components such as aromatic diamine components or aromatic tetracarboxylic acid components, residual solvents, additives, moisture, and denaturants and decomposition products due to heating thereof. Is not limited. That is, in the present invention, the type of volatile component is not meaningful, but the amount of volatile component is technically significant.
- the lower limit of the content of the component that volatilizes in the temperature range of 50 to 350 ° C. of the aromatic polyimide powder for a molded product of the present invention is set from the viewpoint of the mechanical properties of the molded product and the handleability of the powder. It is preferably 1.00% by mass or more, more preferably 1.50% by mass or more, and particularly preferably 2.00% by mass or more. Similarly, the upper limit is preferably 4.30% by mass or less, more preferably 4.00% by mass or less, and particularly preferably 3.00% by mass or less.
- the aromatic polyimide powder for a molded product of the present invention may have a content of a component that volatilizes in a temperature range of 50 to 350 ° C. within the above range, but the mechanical properties of the molded product and the handleability of the powder may be improved. From the viewpoint that it can be increased, when the content of the component volatilizing in the temperature range of 50 to 350 ° C. is 100% by mass, the content of the component volatilizing in the temperature range of 150 to 350 ° C. is preferably 75. It is 0.0 to 99.0% by mass, the lower limit thereof is more preferably 80.0% by mass or more, particularly preferably 90.0% by mass or more, and the upper limit thereof is more preferably 98.0% by mass or less.
- the content of the component volatilizing in the temperature range of 50 to 350 ° C. is set to 100% by mass
- the content of the component that volatilizes in the temperature range of 150 to 250 ° C. is preferably 50.0 to 80.0% by mass, and the lower limit thereof is more preferably 55.0% by mass or more, particularly preferably 60.0%. It is mass% or more, and the upper limit thereof is more preferably 75.0 mass% or less, and particularly preferably 70.0 mass% or less.
- the size of the aromatic polyimide powder for a molded product of the present invention is not particularly limited, but the average particle size thereof is preferably 5 to 20 ⁇ m from the viewpoint of the mechanical properties of the molded product and the handleability of the powder. ..
- the average particle size referred to in the present invention refers to a value measured using a laser diffraction / scattering type particle size distribution measuring device.
- the shape of the aromatic polyimide powder for a molded product is not particularly limited as long as the effect of the present invention is obtained.
- the aromatic polyimide powder for a molded product of the present invention preferably contains an aromatic polyimide containing a repeating unit represented by the following chemical formula (II) as a main component.
- the method for producing the aromatic polyimide powder will be described later.
- X 1 is one or more tetravalent groups in which the carboxyl group is removed from the tetracarboxylic acid having an aromatic ring
- Y 1 is the diamine having an aromatic ring in which the amino group is removed. It is a divalent group of one or more.
- tetravalent group having no substituent on the aromatic ring in particular, a tetravalent group represented by formula (III) ⁇ (VII) are preferred.
- Z 1 is directly bonded or the following divalent group:
- W 1 in the formula is a divalent organic group
- W 2 and W 3 are independently amide bonds, ester bonds, or carbonyl bonds
- W 4 is an organic group containing an aromatic ring.
- W 1 include an aliphatic hydrocarbon group having 2 to 24 carbon atoms and an aromatic hydrocarbon group having 6 to 24 carbon atoms.
- W 4 include aromatic hydrocarbon groups having 6 to 24 carbon atoms.
- Examples of the compound (sometimes also referred to as “aromatic tetracarboxylic acid component”) used as a raw material for forming a tetravalent group represented by the chemical formulas (III) to (VII) include 3,. 3', 4,4'-biphenyltetracarboxylic dianhydride, 2,3,3', 4'-biphenyltetracarboxylic dianhydride, 2,2', 3,3'-biphenyltetracarboxylic dianhydride Compounds, pyromellitic dianhydride, benzophenone tetracarboxylic dianhydride, 4,4'-oxydiphthalic acid dianhydride, diphenylsulfonetetracarboxylic dianhydride, p-terphenyltetracarboxylic dianhydride, m- A tetravalent group derived from an aromatic tetracarboxylic dianhydride such as terphenylt
- 4'-biphenyltetracarboxylic dianhydride 2,3,3', 4'-biphenyltetracarboxylic dianhydride, 2,2', 3,3'-biphenyltetracarboxylic dianhydride, benzophenone tetra More preferably, those derived from carboxylic acid dianhydride, diphenylsulfonetetracarboxylic dianhydride, p-terphenyltetracarboxylic dianhydride, or m-terphenyltetracarboxylic dianhydride, 3,3', Those derived from 4,4'-biphenyltetracarboxylic dianhydride or 2,3,3', 4'-biphenyltetracarboxylic dianhydride are particularly preferred.
- One or more of these aromatic tetracarboxylic acid components may be used.
- a tetracarboxylic acid component having a substituent on the aromatic ring can be used in combination as long as the effect of the present invention is not impaired.
- 5,5'-[2,2,2-trifluoro-1- [3- (trifluoromethyl) phenyl] ethylidene] diphthalic anhydride 5,5'-[2,2,3,3 3-Pentafluoro-1- (trifluoromethyl) pyropyridene] diphthalic anhydride, 1H-difluoro [3,4-b: 3', 4'-i] xanthene-1,3,7,9 (11H)- Tetron, 5,5'-oxybis [4,6,7-trifluoro-pyromellitic anhydride], 3,6-bis (trifluoromethyl) pyromellitic dianhydride, 4- (trifluoromethyl) pyro Halogen-substituted tetracarboxylic dianhydrides such as merit acid dianhydr
- Anhydrides can be mentioned.
- One or two or more of these tetracarboxylic acid components can be used in combination, and may be appropriately selected in consideration of the characteristics to be imparted.
- the tetracarboxylic acid component having a substituent on the aromatic ring is preferably less than 5 mol% of the total tetracarboxylic acid component.
- divalent group preferably having no substituent on the aromatic ring in particular, a divalent group represented by the formula (IX) ⁇ (X) is particularly preferred.
- Z 2 is a direct bond, or the following divalent group:
- W 5 to W 13 in the formula (XII) are independently directly bonded to each other and represent any of the divalent groups represented by the formula (XI).
- Examples of the compound used as a raw material for forming the chemical formulas (IX) to (X) include p-phenylenediamine, m-phenylenediamine, 4, 4'-diaminodiphenyl ether, 4,4'-diaminodiphenylmethane and the like are preferable, and p-phenylenediamine or 4,4'-diaminodiphenyl ether is more preferable from the viewpoint of solvent resistance of the aromatic polyimide molded product. Further, it is more preferable to use p-phenylenediamine from the viewpoint of solvent resistance and mechanical properties of the aromatic polyimide molded product. These aromatic diamine components can be used alone or in combination of two or more.
- a diamine component having a substituent on the aromatic ring can be used in combination as long as the effect of the present invention is not impaired.
- the method for producing an aromatic polyimide powder for a molded product of the present invention is not particularly limited as long as the contained volatile component can be adjusted to 0.50 to 5.00% by mass, but the volatile component can be adjusted.
- an aromatic tetracarboxylic acid component and an aromatic diamine component were used as raw materials (hereinafter collectively referred to as "monomer components") to form an aromatic polyimide via a polyamic acid.
- an aromatic polyimide powder for a molded product can be produced by finally pulverizing it through a step of adjusting a volatile component.
- the polyamic acid preferably contains a repeating unit represented by the following chemical formula (I).
- A is one or more selected from tetravalent groups obtained by removing the carboxyl group from the aromatic tetracarboxylic acid
- B is the divalent group obtained by removing the amino group from the aromatic diamine.
- A is one or more selected from tetravalent groups obtained by removing the carboxyl group from the aromatic tetracarboxylic acid
- B is the divalent group obtained by removing the amino group from the aromatic diamine.
- a tetravalent group having no substituent on the aromatic ring is preferable, and a tetravalent group represented by the above-mentioned chemical formulas (III) to (VII) is particularly preferable.
- Examples of the compound (sometimes also referred to as “aromatic tetracarboxylic acid component”) used as a raw material for forming a tetravalent group represented by the chemical formulas (III) to (VII) include 3,. 3', 4,4'-biphenyltetracarboxylic dianhydride, 2,3,3', 4'-biphenyltetracarboxylic dianhydride, 2,2', 3,3'-biphenyltetracarboxylic dianhydride Compounds, pyromellitic dianhydride, benzophenone tetracarboxylic dianhydride, 4,4'-oxydiphthalic acid dianhydride, diphenylsulfonetetracarboxylic dianhydride, p-terphenyltetracarboxylic dianhydride, m- A tetravalent group derived from an aromatic tetracarboxylic dianhydride such as terphenylt
- 4'-biphenyltetracarboxylic dianhydride 2,3,3', 4'-biphenyltetracarboxylic dianhydride, 2,2', 3,3'-biphenyltetracarboxylic dianhydride, benzophenone tetra More preferably, those derived from carboxylic acid dianhydride, diphenylsulfonetetracarboxylic dianhydride, p-terphenyltetracarboxylic dianhydride, or m-terphenyltetracarboxylic dianhydride, 3,3', Those derived from 4,4'-biphenyltetracarboxylic dianhydride or 2,3,3', 4'-biphenyltetracarboxylic dianhydride are particularly preferred.
- One or more of these aromatic tetracarboxylic acid components may be used.
- a tetracarboxylic acid component having a substituent on the aromatic ring can be used in combination as long as the effect of the present invention is not impaired.
- 5,5'-[2,2,2-trifluoro-1- [3- (trifluoromethyl) phenyl] ethylidene] diphthalic anhydride 5,5'-[2,2,3,3 3-Pentafluoro-1- (trifluoromethyl) pyropyridene] diphthalic anhydride, 1H-difluoro [3,4-b: 3', 4'-i] xanthene-1,3,7,9 (11H)- Tetron, 5,5'-oxybis [4,6,7-trifluoro-pyromellitic anhydride], 3,6-bis (trifluoromethyl) pyromellitic dianhydride, 4- (trifluoromethyl) pyro Halogen-substituted tetracarboxylic dianhydrides such as merit acid dianhydr
- Anhydrides can be mentioned.
- One or two or more of these tetracarboxylic acid components can be used in combination, and may be appropriately selected in consideration of the characteristics to be imparted.
- the tetracarboxylic acid component having a substituent on the aromatic ring is preferably less than 5 mol% of the total tetracarboxylic acid component.
- a divalent group having no substituent on the aromatic ring is preferable, and a divalent group represented by the above-mentioned chemical formulas (IX) to (X) is particularly preferable.
- Examples of the compound used as a raw material for forming the chemical formulas (IX) to (X) include p-phenylenediamine, m-phenylenediamine, 4, 4'-diaminodiphenyl ether, 4,4'-diaminodiphenylmethane and the like are preferable, and p-phenylenediamine or 4,4'-diaminodiphenyl ether is more preferable from the viewpoint of solvent resistance of the aromatic polyimide molded product. Further, it is more preferable to use p-phenylenediamine from the viewpoint of solvent resistance and mechanical properties of the aromatic polyimide molded product. These aromatic diamine components can be used alone or in combination of two or more.
- a diamine component having a substituent on the aromatic ring can be used in combination as long as the effect of the present invention is not impaired.
- Such a polyamic acid can be obtained by reacting an aromatic tetracarboxylic acid component and an aromatic diamine component to a desired viscosity (or molecular weight) in a solvent, if necessary, under heating, using approximately equimolar amounts. good.
- roughly equimolar means that the molar ratio of the aromatic tetracarboxylic acid component to the aromatic diamine component is about 0.90 to 1.10, preferably about 0.95 to 1.05. .
- the above-mentioned aromatic tetracarboxylic acid component and aromatic diamine component may be used as main components.
- the solvent that can be used in this production method is not particularly limited, and a known solvent used in the production of polyamic acid can be selectively used.
- a known solvent used in the production of polyamic acid can be selectively used.
- a solvent having a boiling point of 100 ° C. or higher is preferable from the viewpoint of easy control of the amount of volatile components.
- Examples of such a solvent include N-methyl-2-pyrrolidone, N-ethyl-2-pyrrolidone, N, N-dimethylformamide, N, N-dimethylacetamide, 1,1,3,3-tetramethylurea, 1 , 3-Dimethyl-2-imidazolidinone, N, N-dimethylisobutyramide, N, N-dimethylpropionamide and the like.
- the polyamic acid can be formed by putting the monomer component and the solvent into a reaction vessel equipped with a stirring device and then stirring the mixture.
- the order of adding these raw materials is not particularly limited, but for example, a predetermined amount of the aromatic diamine component may be dissolved in the solvent to add the aromatic tetracarboxylic acid component, or the aromatic tetracarboxylic acid component may be added.
- the aromatic diamine component may be added by dissolving in the solvent, or the aromatic tetracarboxylic acid component and the aromatic diamine component may be added alternately. Further, if necessary, an additive such as a known reaction catalyst may be added at an arbitrary timing.
- the reaction temperature is not particularly limited, but is preferably 0 to 100 ° C, more preferably 10 to 90 ° C, and even more preferably 20 to 70 ° C. By adjusting the reaction temperature within the above range, as a result, it is possible to produce an aromatic polyimide powder having little coloration and variation in mechanical properties. Such a temperature may be constant, or may be raised or lowered as appropriate.
- the aromatic polyimide can be formed by using a known reaction such as a thermal imidization reaction carried out by heating a polyamic acid solution or a chemical imidization reaction carried out by using an imidizing agent. These imidization reactions are preferably carried out in an inert gas atmosphere in which an inert gas such as nitrogen gas or argon gas flows in.
- a known reaction such as a thermal imidization reaction carried out by heating a polyamic acid solution or a chemical imidization reaction carried out by using an imidizing agent.
- These imidization reactions are preferably carried out in an inert gas atmosphere in which an inert gas such as nitrogen gas or argon gas flows in.
- the thermal imidization reaction may be appropriately set at a reaction temperature depending on the type of monomer component and the solvent used, but is usually preferably carried out in the range of 130 to 230 ° C., and is carried out in the range of 140 to 190 ° C. Is more preferable.
- the imidizing agent used in the chemical imidization reaction carboxylic acid anhydrides such as acetic anhydride, propionic anhydride, succinic anhydride, phthalic anhydride, and benzoic anhydride can be used, which can be used for cost and removal after the reaction. It is preferable to use acetic anhydride from the viewpoint of ease of use.
- the catalyst added when forming the polyamic acid may be used as it is, or may be newly or additionally added after forming the polyamic acid.
- the equivalent of the imidizing agent to be used is equal to or more than the equivalent of the amide bond of the polyamic acid performing the chemical imidization reaction, preferably 1.1 to 5 times, preferably 1.5 to 4 times the equivalent of the amide bond. Is more preferable. By using a slightly excessive imidizing agent for the amide bond in this way, the imidization reaction can be efficiently carried out even at a relatively low temperature.
- the aromatic polyimide (powder) preferably has an imidization rate of 95% or more, preferably 98% or more.
- the imidization ratio may be measured by infrared spectroscopy according to a conventional method.
- Aromatic polyimide powder can be obtained by filtering out the powder precipitated in the system from the solution and further undergoing a volatile component adjusting step.
- the volatile component adjusting step is not particularly limited as long as the volatile component of the aromatic polyimide powder can be adjusted, but it is preferable to include a cleaning step and / or a drying step. In order to improve the efficiency of the washing step and / or the drying step, it is preferable to form an aromatic polyimide powder having a particle size close to a desired particle size in advance.
- the imidization reaction may be carried out with stirring, or the aromatic polyimide may be formed and then pulverized. Of course, a plurality of these may be combined.
- the method for cleaning the aromatic polyimide powder is not particularly limited, and a known method can be appropriately selected and performed. From the viewpoint of ease of operation, a method of filtering the aromatic polyimide powder and then rinsing the aromatic polyimide powder remaining on the filter with a cleaning liquid, or a method of separately preparing the aromatic polyimide powder obtained by filtration.
- a cleaning method can be appropriately selected, such as a method of putting the cleaning liquid in a container, adding a cleaning liquid to the container, and then stirring the mixture for cleaning.
- the cleaning liquid used in the cleaning step is not particularly limited as long as it does not dissolve the aromatic polyimide powder, but a hydrophilic solvent such as water or alcohol is preferable.
- the alcohol used as the cleaning liquid is not particularly limited, but from the viewpoint of removing the solvent, imidizing agent, etc. contained in the aromatic polyimide powder, alcohols having a total carbon number of 5 or less, such as methanol, ethanol, and isopropyl alcohol, are used. Preferably, isopropyl alcohol is particularly preferred.
- the cleaning liquid to be used may be selected to have a boiling point of 150 ° C. or lower, more preferably 100 ° C. or lower, from the viewpoint of controlling volatile components. These cleaning solutions can be used alone or mixed with other cleaning solutions if necessary.
- the amount of the cleaning liquid with respect to the aromatic polyimide powder is not particularly limited, but from the viewpoint of industrial productivity, it is preferably 10 times or less the mass of the aromatic polyimide powder immediately after filtration.
- the amount of the cleaning liquid with respect to the aromatic polyimide powder referred to here is the amount of the cleaning liquid used in one cleaning.
- the drying step of the aromatic polyimide powder can be performed at an arbitrary temperature, but for example, from the viewpoint of suppressing the decomposition of the aromatic polyimide powder, it is preferably 400 ° C. or lower, more preferably 350 ° C. or lower, still more preferably. It is 300 ° C. or lower, particularly preferably 200 ° C. or lower.
- the lower limit temperature can be set preferably 80 ° C. or higher, more preferably 100 ° C. or higher, and particularly preferably 110 ° C. or higher.
- the aromatic polyimide powder may be dried under normal pressure or under reduced pressure. Further, it may be carried out in the atmosphere or in an atmosphere of an inert gas, but it is preferably carried out in an atmosphere of an inert gas from the viewpoint of suppressing the decomposition of the aromatic polyimide powder. It can also be performed in a mixed atmosphere of the atmosphere and the inert gas, performed in the atmosphere and then in the inert gas atmosphere, or in the inert gas atmosphere and then in the atmosphere. You may.
- the drying time may be adjusted as appropriate in consideration of the content of volatile components. However, from the viewpoint of suppressing decomposition of the aromatic polyimide powder and industrial productivity, it is preferable to carry out within 36 hours, more preferably within 24 hours, and particularly preferably within 18 hours.
- the lower limit of the drying time is not particularly limited, but is preferably 30 minutes or more, more preferably 1 hour or more.
- Such a washing step and / or a drying step may be repeated a plurality of times, or the washing step and the drying step may be repeated alternately.
- the washing step or the drying step is included a plurality of times, it is not necessary to carry out the washing step or the drying step a plurality of times under the same conditions, and the conditions can be changed as appropriate.
- the type of the cleaning liquid, the amount of the cleaning liquid with respect to the aromatic polyimide powder, and the like may be changed in the cleaning step, and the drying temperature, the drying time, and the like may be changed in the drying step.
- the general cleaning process and / or drying process is focused on eliminating volatile components as much as possible not only in polyimide powder but also in other resin powders.
- the volatile component adjusting step including the washing step and / or the drying step is different in that the content of the volatile component is adjusted to 0.5 to 5.0% by mass. Therefore, in order to distinguish it from a general cleaning step and / or drying step, it is referred to as a volatile component adjusting step in the present invention.
- the production equipment is large and the amount of raw materials used is large, so that the content of volatile components is 0.5% by mass in whole or in part. It is assumed that less than an aromatic polyimide powder can be obtained.
- the content of such volatile components can be adjusted to 0.5 to 5.0% by mass by spraying a desired amount of the above-mentioned organic solvent or the like on the aromatic polyimide powder having a content of less than 0.5% by mass. .. That is, the volatile component adjusting step is a concept that includes not only the step of reducing the content of the volatile component but also the step of increasing the content of the volatile component described above. Again, the volatile component adjusting step is a step of adjusting the content of the volatile component to 0.5 to 5.0% by mass.
- organic solvent to be sprayed in addition to the above-mentioned organic solvent, various organic solvents such as acetone, methyl ethyl ketone, toluene, methanol, ethanol, isopropyl alcohol, ethyl benzoate, ethylene glycol and propylene glycol can be used. Further, after spraying the organic solvent, drying may be performed if necessary. Further, a method of adjusting the content of the volatile component by mixing the aromatic polyimide powder with the above-mentioned organic solvent and drying it may be adopted.
- the aromatic polyimide molded product of the present invention is formed by molding the above-mentioned aromatic polyimide powder for a molded product of the present invention, and has mechanical properties having a bending strength of 60 MPa or more.
- uniaxial molding is performed at room temperature at a pressure of 6000 kgf / cm 2 , to form a rectangular shape having a width of 5 mm, a length of 40 mm, and a thickness of 4 mm.
- a molded product is manufactured by firing without pressure at a temperature of 400 ° C. in an atmosphere.
- the molded product thus produced is measured at a test speed of 0.5 mm / min using a bending strength tester, and the strength at the time of breaking is defined as the breaking strength.
- the bending strength is preferably 62 MPa or more, more preferably 64 MPa or more, still more preferably 65 MPa or more.
- the conditions for non-pressurized firing may be a temperature of 400 ° C. under an air atmosphere, and other conditions are not particularly limited, but typically, the temperature rises at 10 ° C./min. After warming and holding at a temperature of 50 ° C.
- the temperature is raised again at 10 ° C./min, held at a temperature of 200 ° C. for 1 hour, and then raised at 10 ° C./min.
- the condition can be set to hold at 400 ° C. for 15 minutes.
- the molding time in uniaxial molding can be typically 1 minute.
- the production method thereof is not particularly limited, and the amount of volatile components of the aromatic polyimide powder of the present invention is within the above range. It may be used for manufacturing the molded product in the state of.
- the aromatic polyimide powder of the present invention can be filled in a mold and heated and compressed by applying pressure and heat simultaneously or separately. That is, the aromatic polyimide molded product of the present invention may be an aromatic polyimide sintered molded product formed and sintered by heat compression.
- heating temperature and pressure conditions depend on the molding apparatus, and a range suitable for the apparatus can be arbitrarily selected.
- the heat resistance of the aromatic polyimide can be sufficiently exhibited.
- the upper limit of the heating temperature is preferably 600 ° C. or lower, more preferably 550 ° C. or lower, and particularly preferably 500 ° C. or lower.
- the pressure may be selected in the optimum range suitable for the manufacturing apparatus. From the viewpoint of improving the mechanical properties of the aromatic polyimide molded product and suppressing the occurrence of cracks in the aromatic polyimide molded product, it is preferably 4000 kgf / cm 2 or more, more preferably 5000 kgf / cm 2 or more, and particularly preferably 5500 kgf / cm 2 or more. It is preferably 7,000 kgf / cm 2 or less, and more preferably 6500 kgf / cm 2 or less.
- the heat compression molding time in the heat compression molding is preferably 10 minutes or more, more preferably 40 minutes or more, preferably 100 minutes or less, and more preferably 60 minutes or less.
- the compression molding time in compression molding at room temperature is preferably 30 seconds or longer, more preferably 1 minute or longer, preferably 10 minutes or shorter, and more preferably 5 minutes or shorter.
- the aromatic polyimide molded product of the present invention can also be produced by compression molding at the above pressure at room temperature and then sintering under non-compression. That is, the aromatic polyimide molded product of the present invention may be an aromatic polyimide sintered molded product that has been molded and then sintered.
- the sintering temperature is preferably 300 ° C. or higher, more preferably 350 ° C. or higher, particularly preferably 400 ° C. or higher, preferably 600 ° C. or lower, more preferably 600 ° C. or higher, from the viewpoint of the mechanical properties of the aromatic polyimide molded product. It is 550 ° C. or lower, particularly preferably 500 ° C. or lower.
- the sintering time when sintering under uncompressed is preferably 60 minutes or more, more preferably 120 minutes or more, preferably 240 minutes or less, and more preferably 180 minutes or less. It is preferable to cool the sintered molded product at a rate of 5 to 10 ° C./min from the viewpoint of improving the mechanical properties of the aromatic polyimide molded product and suppressing the occurrence of cracks in the molded product.
- the sintering temperature When sintering is performed under uncompressed condition, the sintering temperature may be set to the above temperature, but the rate of temperature rise during sintering is preferably 5 ° C./min or more, more preferably 10. ° C./min or higher, preferably 30 ° C./min or lower, more preferably 20 ° C./min or lower.
- a temperature holding process for maintaining the temperature may be performed in the temperature raising process.
- the temperature holding process may be performed once or a plurality of times in the temperature raising process. For example, when the temperature holding process is performed three times, the holding temperature in the second temperature holding process is set. It is preferably 100 ° C. or higher, more preferably 150 ° C.
- the holding temperature in the third temperature holding treatment is preferably 350 ° C. or higher, more preferably 400 ° C. or higher, preferably 550 ° C. or lower, more preferably 500 ° C. or lower, and the holding time is preferably 5 minutes or longer. , More preferably 15 minutes or more, preferably 60 minutes or less, and more preferably 30 minutes or less.
- any filler can be mixed with the aromatic polyimide powder and used in the production of the aromatic polyimide molded product.
- the filler used is not particularly limited, for example, glass fiber, ceramic fiber, boron fiber, glass bead, whisker, diamond powder, alumina, silica, natural mica, synthetic mica, alumina, carbon black, silver powder, copper powder, aluminum powder. , Nickel powder, metal fiber, ceramic fiber, whisker, silicon carbide, silicon oxide, alumina, magnesium powder, titanium powder, carbon fiber, graphite and other inorganic fillers, or fluorine-containing resin and aramid fiber and other organic fillers. be able to. These fillers may be used alone or in combination of two or more fillers.
- the amount of the filler used can be selected according to the application, and for example, it can be used in the range of 1 to 50% by mass based on the weight of the aromatic polyimide powder.
- Examples of the device for producing the aromatic polyimide molded body in the above-mentioned heat compression molding include a 4-post hydraulic press, a high-pressure hot press, and a WIP device.
- the preformed body is preferably formed by, for example, a method using a Wet-CIP, a Dry-CIP, a high-pressure press, a hydraulic press, a rotary press, or a tablet machine.
- the aromatic polyimide molded product of the present invention can also be produced by applying the above-mentioned heat compression molding method to a sheet-like laminate.
- the aromatic polyimide powder of the present invention can fully exhibit the characteristics of the aromatic polyimide, so that it can be applied to various manufacturing methods and its conditions are wide, so that it has high industrial utility value.
- the aromatic polyimide powder can exhibit excellent mechanical properties even by a method of compression molding at the above pressure at room temperature and then sintering under non-compression (so-called direct molding).
- direct molding a method of compression molding at the above pressure at room temperature and then sintering under non-compression
- aromatic polyimide molded articles having various shapes can be produced with high productivity.
- the aromatic polyimide molded product obtained by the present invention includes pins, guides, evaluation sockets, vacuum pads, etc. for semiconductor manufacturing related equipment, bushes, seal rings, trust washers, bearing retainers, piston rings, etc. for automobile and aerospace applications. It can be suitably used as a locknut insert or the like, a bearing sleep of an industrial machine-related device, a roller bushing, a piston ring or the like.
- ⁇ Average particle size> Using about 20 mg of aromatic polyimide powder as a test sample, the average particle size was measured using a laser diffraction / scattering particle size distribution measuring device.
- the aromatic polyimide powder was uniaxially molded in a powder molding machine at a pressure of 6000 kgf / cm 2 at room temperature for 1 minute to obtain an aromatic polyimide molded body having a width of 5 mm, a length of 40 mm, and a thickness of 4 mm.
- s-BPDA 3,3', 4,4'-biphenyltetracarboxylic acid dianhydride
- a-BPDA 2,3,3', 4'-biphenyltetracarboxylic acid dianhydride
- PMDA 1,2,4 5-benzenetetracarboxylic acid dianhydride
- ODPA 4,4'-oxydiphthalic acid dianhydride
- PPD paraphenylenediamine
- NMP N-methyl-2-pyrrolidone
- IPA isopropyl alcohol
- the amount of the volatile component of the obtained aromatic polyimide powder A (content of the component volatile in the temperature range of 50 to 350 ° C., the same applies hereinafter) was 1.03% by mass.
- the content of the component that volatilizes in the temperature range of 150 to 350 ° C. is 0.99% by mass (96.1% by mass in the total amount of volatile components), and the content of the component that volatilizes in the temperature range of 150 to 250 ° C. was 0.61% by mass (59.2% by mass in the total amount of volatile components).
- Aromatic polyimide powder B was obtained.
- the amount of the volatile component of the obtained aromatic polyimide powder B was 1.50% by mass.
- Aromatic polyimide powder C was obtained.
- the amount of the volatile component of the obtained aromatic polyimide powder C was 2.10% by mass.
- Aromatic polyimide powder D was obtained.
- the amount of the volatile component of the obtained aromatic polyimide powder D was 4.23% by mass.
- Aromatic Polyimide Powder I ⁇ Preparation of Aromatic Polyimide Powder I> In the same manner as the preparation of the aromatic polyimide powder A, the aromatic polyimide powder is precipitated, the precipitated powder is filtered off, washed once with IPA, and dried at 120 ° C. for 2 hours in a nitrogen atmosphere. Aromatic polyimide powder I was obtained. The amount of the volatile component of the obtained aromatic polyimide powder I was 10.49% by mass.
- Example 1 The obtained aromatic polyimide powder A was filled in a mold and uniaxially molded for 1 minute at a pressure of 6000 kgf / cm 2 at room temperature using a powder molding machine, and the width was 5 mm, the length was 40 mm, and the thickness was 4 mm.
- the aromatic polyimide molded product of the above was obtained.
- the obtained aromatic polyimide molded product was fired at 400 ° C. in an air atmosphere without pressure, and then the bending strength was evaluated. The results obtained are shown in Table 1.
- the specific conditions for firing were as follows. That is, the temperature is raised at 10 ° C./min, held at a temperature of 50 ° C.
- Example 2 An aromatic polyimide molded product was obtained in the same procedure as in Example 1 except that the aromatic polyimide powder B was used instead of the aromatic polyimide powder A. The bending strength of the obtained aromatic polyimide molded product was evaluated. The results obtained are shown in Table 1.
- Example 3 An aromatic polyimide molded product was obtained in the same procedure as in Example 1 except that the aromatic polyimide powder C was used instead of the aromatic polyimide powder A. The bending strength of the obtained aromatic polyimide molded product was evaluated. The results obtained are shown in Table 1.
- Example 4 An aromatic polyimide molded product was obtained in the same procedure as in Example 1 except that the aromatic polyimide powder D was used instead of the aromatic polyimide powder A. The bending strength of the obtained aromatic polyimide molded product was evaluated. The results obtained are shown in Table 1.
- Example 5 An aromatic polyimide molded product was obtained in the same procedure as in Example 1 except that the aromatic polyimide powder K was used instead of the aromatic polyimide powder A. The bending strength of the obtained aromatic polyimide molded product was evaluated. The results obtained are shown in Table 3.
- Example 6 An aromatic polyimide molded product was obtained in the same procedure as in Example 1 except that the aromatic polyimide powder L was used instead of the aromatic polyimide powder A. The bending strength of the obtained aromatic polyimide molded product was evaluated. The results obtained are shown in Table 3.
- Example 7 In the same manner as in Example 1, uniaxial molding was performed using the aromatic polyimide powder A to obtain an aromatic polyimide molded body having a width of 5 mm, a length of 40 mm, and a thickness of 4 mm. Then, the obtained molded product was subjected to non-pressurizing firing under the conditions shown in Table 4 in an air atmosphere, and the bending strength was evaluated. The results obtained are shown in Table 4.
- Example 8> In the same manner as in Example 1, uniaxial molding was performed using the aromatic polyimide powder A to obtain an aromatic polyimide molded body having a width of 5 mm, a length of 40 mm, and a thickness of 4 mm. Then, the obtained molded product was subjected to non-pressurizing firing under the conditions shown in Table 4 in an air atmosphere, and the bending strength was evaluated. The results obtained are shown in Table 4.
- the molded product obtained by molding the aromatic polyimide powders of Examples 1 to 8 had a low content of volatile components, and the aromatic polyimides of Comparative Examples 1 to 3 were evaluated. Compared with the molded product obtained by molding the powder, it had the same excellent solvent resistance. On the other hand, as the content of the volatile component increased, the solvent resistance deteriorated.
- the aromatic polyimide powder of the present invention can provide an aromatic polyimide molded product having excellent mechanical properties without deteriorating solvent resistance. Further, it is possible to provide a method for improving the mechanical strength of the aromatic polyimide molded product.
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Abstract
Description
1. 成形体用芳香族ポリイミド粉体であって、当該成形体用芳香族ポリイミド粉体に含有される揮発成分の含有量が、25℃における芳香族ポリイミド粉体100質量%に対して0.50~5.00質量%である成形体用芳香族ポリイミド粉体。本発明の成形体用芳香族ポリイミド粉体は、本発明の成形体用芳香族ポリイミド粉体を成形して得られる芳香族ポリイミド成形体の曲げ強度が60MPa以上であることが好ましい。
2.1に記載の成形体用芳香族ポリイミド粉体の製造方法であって、芳香族ポリイミド粉体の揮発成分の総量の割合を、25℃における芳香族ポリイミド粉体100質量%に対して0.50~5.00質量%の範囲内に調整する揮発成分調整工程を含む、成形体用芳香族ポリイミド粉体の製造方法。
3.2に記載の前記揮発成分調整工程が、洗浄工程および/または乾燥工程を含む、成形体用芳香族ポリイミド粉体の製造方法。
4.3に記載の洗浄工程がアルコールによる洗浄工程を含む、成形体用芳香族ポリイミド粉体の製造方法。
5.1に記載の成形体用芳香族ポリイミド粉体を成形してなる、曲げ強度が60MPa以上である芳香族ポリイミド成形体。
6.芳香族ポリイミド成形体の機械的強度向上方法であって、原料である芳香族ポリイミド粉体に含有される揮発成分の含有量を、25℃における芳香族ポリイミド粉体100質量%に対して0.50~5.00質量%に調整する、芳香族ポリイミド成形体の機械的強度向上方法。
最初に、本発明の成形体用芳香族ポリイミド粉体について説明する。本発明の成形体用芳香族ポリイミド粉体は、揮発成分を0.50~5.00質量%含有するものである。ここで、「揮発成分」とは、50~350℃の温度範囲で揮発する成分をいう。そして本発明では、この揮発成分が、25℃における芳香族ポリイミド粉体100質量%に対して0.50~5.00質量%含有することを特徴とする。すなわち、例えば、50~350℃の温度範囲で揮発する成分の量が、1.00質量%である場合には、成形体用芳香族ポリイミド粉体は、主として芳香族ポリイミド粉体から構成される、50~350℃の温度範囲で揮発しない成分99.00質量%と、50~350℃の温度範囲で揮発する成分1.00質量%とから構成されることとなる。
次に、本発明の成形体用芳香族ポリイミド粉体の製造方法について、代表的な例を示しながら説明する。本発明の成形体用芳香族ポリイミド粉体の製造方法は、含有する揮発成分が0.50~5.00質量%に調整することができれば、特に限定されるものではないが、揮発成分の調整のしやすさの点から、芳香族テトラカルボン酸成分と芳香族ジアミン成分とを原料(以下、纏めて「モノマー成分」ともいう)として使用し、ポリアミック酸を経由して芳香族ポリイミドを形成したのちに、揮発成分を調整する工程を経て、最終的に粉体化することによって、成形体用芳香族ポリイミド粉体を製造することができる。
芳香族ポリイミドは、ポリアミック酸溶液を加熱して行う熱イミド化反応や、イミド化剤を用いて行う化学イミド化反応などの公知の反応を利用することで形成することができる。これらのイミド化反応は、窒素ガスやアルゴンガス等の不活性ガスを流入し、不活性ガス雰囲気下で行うことが好ましい。
最後に、芳香族ポリイミド粉体を製造する工程について説明する。前記のようにポリアミック酸溶液から芳香族ポリイミドが形成されると、その溶液系内には、芳香族ポリイミドが不溶物として析出される。系内に析出した粉体を溶液から濾別し、さらに揮発成分調整工程を経ることによって、芳香族ポリイミド粉体を得ることができる。
本発明の芳香族ポリイミド成形体は、上述した本発明の成形体用芳香族ポリイミド粉体を成形してなるものであり、曲げ強度が60MPa以上の機械的物性を有する。ここで、本発明でいう曲げ強度は以下のような条件で成形した成形体を曲げ強度試験機を用いて破断強度をn=10回で測定し、その平均値を算出したものである。粉末成形機に粉末を充填後、室温で6000kgf/cm2の圧力で1軸成形することで幅5mm×長さ40mm×厚み4mmの直方体形状に成形し、この直方体状に成形されたものを空気雰囲気下、温度400℃で、無加圧焼成することで成形体を製造する。こうして製造された成形体を、曲げ強度試験機を用いて試験速度0.5mm/分で測定し、破断した時の強度を破断強度とする。曲げ強度は、好ましくは62MPa以上、より好ましくは64MPa以上、さらに好ましくは65MPa以上である。なお、この際において、無加圧焼成する際の条件としては、空気雰囲気下、温度400℃とすればよく、その他の条件は特に限定されないが、代表的には、10℃/分にて昇温を行い、温度50℃で30分保持した後、再度、10℃/分にて昇温を行い、温度200℃で1時間保持し、次いで、10℃/分にて昇温を行い、温度400℃にて15分間保持する条件とすることができる。また、1軸成形における成形時間は、代表的には、1分間とすることができる。
約20mgの芳香族ポリイミド粉体を試験サンプルとし、熱重量計測定装置を用い、窒素雰囲気下、昇温速度20℃/分で、25℃から700℃まで昇温した。得られた重量曲線から、50~350℃の重量減少率を求めた。また、この際に、150~250℃における重量減少率および150~350℃における重量減少率も求めた。
約20mgの芳香族ポリイミド粉体を試験サンプルとして、レーザー回折/散乱式粒度分布測定装置を用い、平均粒子径を測定した。
芳香族ポリイミド粉体を粉末成形機にて、室温で6000kgf/cm2の圧力で、1分間、1軸成形することで幅5mm×長さ40mm×厚み4mmの芳香族ポリイミド成形体を得たのち、得られた芳香族ポリイミド成形体を空気雰囲気下、後述の所定の温度条件で、無加圧焼成後、曲げ強度試験機を用いて試験速度0.5mm/分で測定した。n=10回測定を行い、その平均値を曲げ強度とした。
s-BPDA:3,3’,4,4’-ビフェニルテトラカルボン酸二無水物
a-BPDA:2,3,3’,4’-ビフェニルテトラカルボン酸二無水物
PMDA:1,2,4,5-ベンゼンテトラカルボン酸二無水物
ODPA:4,4’-オキシジフタル酸二無水物
PPD:パラフェニレンジアミン
NMP:N-メチル-2-ピロリドン
IPA:イソプロピルアルコール
溶媒としてNMP240.00gを加え、s-BPDA28.56g、a-BPDA2.15g、PPD11.29gを加えて攪拌溶解した。次いで、50℃に昇温させて重合を行い、ポリアミック酸溶液を得た。その後、さらに190℃に昇温させてイミド化反応を行わせ、芳香族ポリイミド粉体を析出させた。析出した粉体を濾別し、IPAで4回洗浄後、2kPaの減圧下、100℃で24時間乾燥させることで芳香族ポリイミド粉体Aを得た。得られた芳香族ポリイミド粉体Aの揮発成分量(50~350℃の温度範囲で揮発する成分の含有量、以下同様。)は1.03質量%であった。また、150~350℃の温度範囲で揮発する成分の含有量は0.99質量%(全揮発成分量中、96.1質量%)、150~250℃の温度範囲で揮発する成分の含有量は0.61質量%(全揮発成分量中、59.2質量%)であった。
芳香族ポリイミド粉体Aの調製と同様にして、芳香族ポリイミド粉体を析出させたのち、析出した粉体を濾別し、IPAで4回洗浄後、窒素雰囲気下、120℃で2時間乾燥させることで芳香族ポリイミド粉体Bを得た。得られた芳香族ポリイミド粉体Bの揮発成分量は1.50質量%であった。また、150~350℃の温度範囲で揮発する成分の含有量は1.23質量%(全揮発成分量中、82.0質量%)、150~250℃の温度範囲で揮発する成分の含有量は0.78質量%(全揮発成分量中、52.0質量%)であった。
芳香族ポリイミド粉体Aの調製と同様にして、芳香族ポリイミド粉体を析出させたのち、析出した粉体を濾別し、IPAで3回洗浄後、窒素雰囲気下、120℃で2時間乾燥させることで芳香族ポリイミド粉体Cを得た。得られた芳香族ポリイミド粉体Cの揮発成分量は2.10質量%であった。また、150~350℃の温度範囲で揮発する成分の含有量は1.97質量%(全揮発成分量中、93.8質量%)、150~250℃の温度範囲で揮発する成分の含有量は1.51質量%(全揮発成分量中、71.9質量%)であった。
芳香族ポリイミド粉体Aの調製と同様にして、芳香族ポリイミド粉体を析出させたのち、析出した粉体を濾別し、IPAで2回洗浄後、窒素雰囲気下、120℃で2時間乾燥させることで芳香族ポリイミド粉体Dを得た。得られた芳香族ポリイミド粉体Dの揮発成分量は4.23質量%であった。また、150~350℃の温度範囲で揮発する成分の含有量は3.27質量%(全揮発成分量中、77.3質量%)、150~250℃の温度範囲で揮発する成分の含有量は2.81質量%(全揮発成分量中、66.4質量%)であった。
芳香族ポリイミド粉体Aの調製と同様にして、芳香族ポリイミド粉体を析出させたのち、析出した粉体を濾別し、IPAで4回洗浄後、窒素雰囲気下、260℃で8時間乾燥させることで芳香族ポリイミド粉体Eを得た。得られた芳香族ポリイミド粉体Eの揮発成分量は0.08質量%であった。
芳香族ポリイミド粉体Aの調製と同様にして、芳香族ポリイミド粉体を析出させたのち、析出した粉体を濾別し、IPAで4回洗浄後、2kPaの減圧下、250℃で24時間乾燥させることで芳香族ポリイミド粉体Fを得た。得られた芳香族ポリイミド粉体Fの揮発成分量は0.20質量%であった。
芳香族ポリイミド粉体Aの調製と同様にして、芳香族ポリイミド粉体を析出させたのち、析出した粉体を濾別し、IPAで4回洗浄後、2kPaの減圧下、225℃で18時間乾燥させることで芳香族ポリイミド粉体Gを得た。得られた芳香族ポリイミド粉体Gの揮発成分量は0.49質量%であった。
芳香族ポリイミド粉体Aの調製と同様にして、芳香族ポリイミド粉体を析出させたのち、析出した粉体を濾別し、IPAで1回洗浄後、2kPaの減圧下、100℃で24時間乾燥させることで芳香族ポリイミド粉体Hを得た。得られた芳香族ポリイミド粉体Hの揮発成分量は5.62質量%であった。
芳香族ポリイミド粉体Aの調製と同様にして、芳香族ポリイミド粉体を析出させたのち、析出した粉体を濾別し、IPAで1回洗浄後、窒素雰囲気下、120℃で2時間乾燥させることで芳香族ポリイミド粉体Iを得た。得られた芳香族ポリイミド粉体Iの揮発成分量は10.49質量%であった。
芳香族ポリイミド粉体Aの調製と同様にして、芳香族ポリイミド粉体を析出させたのち、析出した粉体を濾別後、窒素雰囲気下、120℃で2時間乾燥させることで芳香族ポリイミド粉体Jを得た。得られた芳香族ポリイミド粉体Jの揮発成分量は50.00質量%であった。
上記方法により得られた芳香族ポリイミド粉体Aを7g準備し、安息香酸エチル1g、及びアセトン29gを加え、攪拌した。次いで、安息香酸エチル及びアセトンを加えた芳香族ポリイミド粉体を、窒素雰囲気下、120℃で、2時間乾燥させることで芳香族ポリイミド粉体Kを得た。得られた芳香族ポリイミド粉体Kの揮発成分量は0.98質量%であった。
上記方法により得られた芳香族ポリイミド粉体Aを6g準備し、NMP1g、及びアセトン29gを加え、攪拌した。次いで、NMP及びアセトンを加えた芳香族ポリイミド粉体を、窒素雰囲気下、120℃で、2時間乾燥させることで芳香族ポリイミド粉体Lを得た。得られた芳香族ポリイミド粉体Lの揮発成分量は4.13質量%であった。
得られた芳香族ポリイミド粉体Aを金型に充填し、粉末成形機を使用して室温で6000kgf/cm2の圧力で、1分間、1軸成形し、幅5mm×長さ40mm×厚み4mmの芳香族ポリイミド成形体を得た。得られた芳香族ポリイミド成形体を400℃で大気雰囲気下、無加圧焼成後、曲げ強度を評価した。得られた結果を表1に示す。なお、焼成の具体的な条件としては、次の通りとした。すなわち、10℃/分にて昇温を行い、温度50℃で30分保持した後、再度、10℃/分にて昇温を行い、温度200℃で1時間保持し、次いで、10℃/分にて昇温を行い、温度400℃にて15分間保持した後、10℃/分にて冷却させた。
芳香族ポリイミド粉体Aの代わりに芳香族ポリイミド粉体Bを用いた以外は実施例1と同様の手順で芳香族ポリイミド成形体を得た。得られた芳香族ポリイミド成形体を曲げ強度を評価した。得られた結果を表1に示す。
芳香族ポリイミド粉体Aの代わりに芳香族ポリイミド粉体Cを用いた以外は実施例1と同様の手順で芳香族ポリイミド成形体を得た。得られた芳香族ポリイミド成形体を曲げ強度を評価した。得られた結果を表1に示す。
芳香族ポリイミド粉体Aの代わりに芳香族ポリイミド粉体Dを用いた以外は実施例1と同様の手順で芳香族ポリイミド成形体を得た。得られた芳香族ポリイミド成形体を曲げ強度を評価した。得られた結果を表1に示す。
芳香族ポリイミド粉体Aの代わりに芳香族ポリイミド粉体Eを用いた以外は実施例1と同様の手順で芳香族ポリイミド成形体を得た。得られた芳香族ポリイミド成形体を曲げ強度を評価した。得られた結果を表2に示す。
芳香族ポリイミド粉体Aの代わりに芳香族ポリイミド粉体Fを用いた以外は実施例1と同様の手順で芳香族ポリイミド成形体を得た。得られた芳香族ポリイミド成形体を曲げ強度を評価した。得られた結果を表2に示す。
芳香族ポリイミド粉体Aの代わりに芳香族ポリイミド粉体Gを用いた以外は実施例1と同様の手順で芳香族ポリイミド成形体を得た。得られた芳香族ポリイミド成形体を曲げ強度を評価した。得られた結果を表2に示す。
芳香族ポリイミド粉体Aの代わりに芳香族ポリイミド粉体Hを用いた以外は実施例1と同様の手順で芳香族ポリイミド成形体を得た。得られた芳香族ポリイミド成形体を曲げ強度を評価した。得られた結果を表2に示す。
芳香族ポリイミド粉体Aの代わりに芳香族ポリイミド粉体Iを用いた以外は実施例1と同様の手順で芳香族ポリイミド成形体を得た。得られた芳香族ポリイミド成形体を曲げ強度を評価した。得られた結果を表2に示す。
芳香族ポリイミド粉体Aの代わりに芳香族ポリイミド粉体Jを用いた以外は実施例1と同様の手順で成形しようとしたが、うまく成形できなかった(成形不可)。
芳香族ポリイミド粉体Aの代わりに芳香族ポリイミド粉体Kを用いた以外は実施例1と同様の手順で芳香族ポリイミド成形体を得た。得られた芳香族ポリイミド成形体を曲げ強度を評価した。得られた結果を表3に示す。
芳香族ポリイミド粉体Aの代わりに芳香族ポリイミド粉体Lを用いた以外は実施例1と同様の手順で芳香族ポリイミド成形体を得た。得られた芳香族ポリイミド成形体を曲げ強度を評価した。得られた結果を表3に示す。
実施例1と同様にして、芳香族ポリイミド粉体Aを用いて1軸成形することで、幅5mm×長さ40mm×厚み4mmの芳香族ポリイミド成形体を得た。そして、得られた成形体について、大気雰囲気下、無加圧焼成を、表4に示す条件で行い、曲げ強度を評価した。得られた結果を表4に示す。
実施例1と同様にして、芳香族ポリイミド粉体Aを用いて1軸成形することで、幅5mm×長さ40mm×厚み4mmの芳香族ポリイミド成形体を得た。そして、得られた成形体について、大気雰囲気下、無加圧焼成を、表4に示す条件で行い、曲げ強度を評価した。得られた結果を表4に示す。
Claims (6)
- 成形体用芳香族ポリイミド粉体であって、当該成形体用芳香族ポリイミド粉体に含有される揮発成分の含有量が、25℃における芳香族ポリイミド粉体100質量%に対して0.50~5.00質量%であり、かつ成形して得られる芳香族ポリイミド成形体の曲げ強度が60MPa以上である成形体用芳香族ポリイミド粉体。
- 請求項1に記載の成形体用芳香族ポリイミド粉体の製造方法であって、芳香族ポリイミド粉体の揮発成分の総量の割合を、25℃における芳香族ポリイミド粉体100質量%に対して0.50~5.00質量%の範囲内に調整する揮発成分調整工程を含む、請求項1に記載の成形体用芳香族ポリイミド粉体の製造方法。
- 前記揮発成分調整工程が、洗浄工程および/または乾燥工程を含む、請求項2に記載の成形体用芳香族ポリイミド粉体の製造方法。
- 洗浄工程がアルコールによる洗浄工程を含む、請求項3に記載の成形体用芳香族ポリイミド粉体の製造方法。
- 請求項1に記載の成形体用芳香族ポリイミド粉体を成形してなる、曲げ強度が60MPa以上である芳香族ポリイミド成形体。
- 芳香族ポリイミド成形体の機械的強度向上方法であって、原料である芳香族ポリイミド粉体に含有される揮発成分の含有量を、25℃における芳香族ポリイミド粉体100質量%に対して0.50~5.00質量%に調整する、芳香族ポリイミド成形体の機械的強度向上方法。
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CN202180019761.XA CN115279820A (zh) | 2020-03-13 | 2021-03-11 | 成型体用芳香族聚酰亚胺粉体、使用了该粉体的成型体、以及成型体的机械强度提高方法 |
KR1020227034835A KR20220147139A (ko) | 2020-03-13 | 2021-03-11 | 성형체용 방향족 폴리이미드 분체, 그것을 사용한 성형체 및 성형체의 기계적 강도 향상 방법 |
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JPWO2021182589A1 (ja) | 2021-09-16 |
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