WO2021251189A1 - オキシメチレン共重合体樹脂組成物およびその製造方法 - Google Patents
オキシメチレン共重合体樹脂組成物およびその製造方法 Download PDFInfo
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- WO2021251189A1 WO2021251189A1 PCT/JP2021/020580 JP2021020580W WO2021251189A1 WO 2021251189 A1 WO2021251189 A1 WO 2021251189A1 JP 2021020580 W JP2021020580 W JP 2021020580W WO 2021251189 A1 WO2021251189 A1 WO 2021251189A1
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- Prior art keywords
- resin composition
- compound
- oxymethylene copolymer
- copolymer resin
- mass
- Prior art date
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- 239000011342 resin composition Substances 0.000 title claims abstract description 88
- 125000005704 oxymethylene group Chemical group [H]C([H])([*:2])O[*:1] 0.000 title claims abstract description 84
- 229920006026 co-polymeric resin Polymers 0.000 title claims abstract description 78
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 78
- -1 aryl boron fluoride compound Chemical class 0.000 claims abstract description 157
- 229920001577 copolymer Polymers 0.000 claims abstract description 67
- 229910015900 BF3 Inorganic materials 0.000 claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 claims abstract description 41
- 238000000034 method Methods 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims description 46
- WTEOIRVLGSZEPR-UHFFFAOYSA-N boron trifluoride Substances FB(F)F WTEOIRVLGSZEPR-UHFFFAOYSA-N 0.000 claims description 44
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 40
- 239000003999 initiator Substances 0.000 claims description 38
- 239000007795 chemical reaction product Substances 0.000 claims description 36
- 229910052796 boron Inorganic materials 0.000 claims description 27
- BGJSXRVXTHVRSN-UHFFFAOYSA-N 1,3,5-trioxane Chemical compound C1OCOCO1 BGJSXRVXTHVRSN-UHFFFAOYSA-N 0.000 claims description 26
- 239000000203 mixture Substances 0.000 claims description 24
- 150000001875 compounds Chemical class 0.000 claims description 23
- PWZFXELTLAQOKC-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide;tetrahydrate Chemical group O.O.O.O.[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 PWZFXELTLAQOKC-UHFFFAOYSA-A 0.000 claims description 22
- 229960001545 hydrotalcite Drugs 0.000 claims description 22
- 229910001701 hydrotalcite Inorganic materials 0.000 claims description 22
- 239000002530 phenolic antioxidant Substances 0.000 claims description 22
- 239000000178 monomer Substances 0.000 claims description 19
- 229910021645 metal ion Inorganic materials 0.000 claims description 16
- 125000004432 carbon atom Chemical group C* 0.000 claims description 15
- 229920006122 polyamide resin Polymers 0.000 claims description 15
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims description 13
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 claims description 13
- 150000001450 anions Chemical class 0.000 claims description 13
- 125000004122 cyclic group Chemical group 0.000 claims description 12
- 125000005702 oxyalkylene group Chemical group 0.000 claims description 11
- OBAJXDYVZBHCGT-UHFFFAOYSA-N tris(pentafluorophenyl)borane Chemical compound FC1=C(F)C(F)=C(F)C(F)=C1B(C=1C(=C(F)C(F)=C(F)C=1F)F)C1=C(F)C(F)=C(F)C(F)=C1F OBAJXDYVZBHCGT-UHFFFAOYSA-N 0.000 claims description 10
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 9
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 9
- IAAKXIPQVRCQAY-UHFFFAOYSA-N difluoro-(2,3,4,5,6-pentafluorophenyl)borane Chemical compound FB(F)C1=C(F)C(F)=C(F)C(F)=C1F IAAKXIPQVRCQAY-UHFFFAOYSA-N 0.000 claims description 7
- OTRXCHZIIFVNRW-UHFFFAOYSA-N fluoro-bis(2,3,4,5,6-pentafluorophenyl)borane Chemical compound FC=1C(F)=C(F)C(F)=C(F)C=1B(F)C1=C(F)C(F)=C(F)C(F)=C1F OTRXCHZIIFVNRW-UHFFFAOYSA-N 0.000 claims description 7
- 150000004677 hydrates Chemical class 0.000 claims description 7
- LCGLNKUTAGEVQW-UHFFFAOYSA-N Dimethyl ether Chemical compound COC LCGLNKUTAGEVQW-UHFFFAOYSA-N 0.000 claims description 6
- 150000004292 cyclic ethers Chemical class 0.000 claims description 6
- YLQBMQCUIZJEEH-UHFFFAOYSA-N tetrahydrofuran Natural products C=1C=COC=1 YLQBMQCUIZJEEH-UHFFFAOYSA-N 0.000 claims description 6
- DURPTKYDGMDSBL-UHFFFAOYSA-N 1-butoxybutane Chemical compound CCCCOCCCC DURPTKYDGMDSBL-UHFFFAOYSA-N 0.000 claims description 5
- 150000005215 alkyl ethers Chemical class 0.000 claims description 5
- 239000011203 carbon fibre reinforced carbon Substances 0.000 claims description 5
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 4
- 229910052731 fluorine Inorganic materials 0.000 claims description 4
- 239000011737 fluorine Substances 0.000 claims description 4
- 239000002952 polymeric resin Substances 0.000 claims description 3
- 229920003002 synthetic resin Polymers 0.000 claims description 3
- 238000007334 copolymerization reaction Methods 0.000 claims description 2
- 238000003682 fluorination reaction Methods 0.000 claims description 2
- 238000006116 polymerization reaction Methods 0.000 abstract description 76
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 description 52
- 239000000047 product Substances 0.000 description 45
- 235000019645 odor Nutrition 0.000 description 30
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 21
- 239000012986 chain transfer agent Substances 0.000 description 21
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 18
- 229920006324 polyoxymethylene Polymers 0.000 description 18
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 15
- 239000002994 raw material Substances 0.000 description 15
- 229920000642 polymer Polymers 0.000 description 14
- 239000003381 stabilizer Substances 0.000 description 14
- 238000002156 mixing Methods 0.000 description 13
- 238000004898 kneading Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 12
- 229910052757 nitrogen Inorganic materials 0.000 description 12
- 239000008188 pellet Substances 0.000 description 12
- 238000000465 moulding Methods 0.000 description 11
- 239000000243 solution Substances 0.000 description 10
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- 239000011777 magnesium Substances 0.000 description 9
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 description 9
- 238000011002 quantification Methods 0.000 description 9
- 229920005989 resin Polymers 0.000 description 9
- 239000011347 resin Substances 0.000 description 9
- 239000002904 solvent Substances 0.000 description 9
- 238000004458 analytical method Methods 0.000 description 8
- 235000014113 dietary fatty acids Nutrition 0.000 description 8
- 239000000194 fatty acid Substances 0.000 description 8
- 229930195729 fatty acid Natural products 0.000 description 8
- 150000004665 fatty acids Chemical class 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 229930182556 Polyacetal Natural products 0.000 description 7
- 239000004952 Polyamide Substances 0.000 description 7
- 239000000654 additive Substances 0.000 description 7
- 229920002647 polyamide Polymers 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 6
- 229920000877 Melamine resin Polymers 0.000 description 6
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 6
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 6
- 230000006641 stabilisation Effects 0.000 description 6
- 238000011105 stabilization Methods 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- WNXJIVFYUVYPPR-UHFFFAOYSA-N 1,3-dioxolane Chemical compound C1COCO1 WNXJIVFYUVYPPR-UHFFFAOYSA-N 0.000 description 5
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 5
- 239000007983 Tris buffer Substances 0.000 description 5
- 239000003963 antioxidant agent Substances 0.000 description 5
- 230000003078 antioxidant effect Effects 0.000 description 5
- 238000012662 bulk polymerization Methods 0.000 description 5
- 238000004895 liquid chromatography mass spectrometry Methods 0.000 description 5
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 5
- 125000006353 oxyethylene group Chemical group 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- HBLHIFXCOJCFTK-UHFFFAOYSA-N tris(2,3,4,5,6-pentafluorophenyl)borane;trihydrate Chemical compound O.O.O.FC1=C(F)C(F)=C(F)C(F)=C1B(C=1C(=C(F)C(F)=C(F)C=1F)F)C1=C(F)C(F)=C(F)C(F)=C1F HBLHIFXCOJCFTK-UHFFFAOYSA-N 0.000 description 5
- BYEAHWXPCBROCE-UHFFFAOYSA-N 1,1,1,3,3,3-hexafluoropropan-2-ol Chemical compound FC(F)(F)C(O)C(F)(F)F BYEAHWXPCBROCE-UHFFFAOYSA-N 0.000 description 4
- QSRJVOOOWGXUDY-UHFFFAOYSA-N 2-[2-[2-[3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propanoyloxy]ethoxy]ethoxy]ethyl 3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C)=CC(CCC(=O)OCCOCCOCCOC(=O)CCC=2C=C(C(O)=C(C)C=2)C(C)(C)C)=C1 QSRJVOOOWGXUDY-UHFFFAOYSA-N 0.000 description 4
- 229920001174 Diethylhydroxylamine Polymers 0.000 description 4
- XTHFKEDIFFGKHM-UHFFFAOYSA-N Dimethoxyethane Chemical compound COCCOC XTHFKEDIFFGKHM-UHFFFAOYSA-N 0.000 description 4
- 239000002253 acid Substances 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- FVCOIAYSJZGECG-UHFFFAOYSA-N diethylhydroxylamine Chemical compound CCN(O)CC FVCOIAYSJZGECG-UHFFFAOYSA-N 0.000 description 4
- NKDDWNXOKDWJAK-UHFFFAOYSA-N dimethoxymethane Chemical compound COCOC NKDDWNXOKDWJAK-UHFFFAOYSA-N 0.000 description 4
- 150000002222 fluorine compounds Chemical class 0.000 description 4
- 150000004679 hydroxides Chemical class 0.000 description 4
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 4
- 239000000347 magnesium hydroxide Substances 0.000 description 4
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 4
- TZIHFWKZFHZASV-UHFFFAOYSA-N methyl formate Chemical compound COC=O TZIHFWKZFHZASV-UHFFFAOYSA-N 0.000 description 4
- 238000005453 pelletization Methods 0.000 description 4
- XNLICIUVMPYHGG-UHFFFAOYSA-N pentan-2-one Chemical compound CCCC(C)=O XNLICIUVMPYHGG-UHFFFAOYSA-N 0.000 description 4
- FDPIMTJIUBPUKL-UHFFFAOYSA-N pentan-3-one Chemical compound CCC(=O)CC FDPIMTJIUBPUKL-UHFFFAOYSA-N 0.000 description 4
- 238000007086 side reaction Methods 0.000 description 4
- WSLDOOZREJYCGB-UHFFFAOYSA-N 1,2-Dichloroethane Chemical compound ClCCCl WSLDOOZREJYCGB-UHFFFAOYSA-N 0.000 description 3
- 238000005160 1H NMR spectroscopy Methods 0.000 description 3
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 3
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 3
- ZMANZCXQSJIPKH-UHFFFAOYSA-N Triethylamine Chemical compound CCN(CC)CC ZMANZCXQSJIPKH-UHFFFAOYSA-N 0.000 description 3
- 238000002441 X-ray diffraction Methods 0.000 description 3
- 125000001931 aliphatic group Chemical group 0.000 description 3
- UGMCXQCYOVCMTB-UHFFFAOYSA-K dihydroxy(stearato)aluminium Chemical compound CCCCCCCCCCCCCCCCCC(=O)O[Al](O)O UGMCXQCYOVCMTB-UHFFFAOYSA-K 0.000 description 3
- 239000000539 dimer Substances 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
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- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 3
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- FQERLIOIVXPZKH-UHFFFAOYSA-N 1,2,4-trioxane Chemical compound C1COOCO1 FQERLIOIVXPZKH-UHFFFAOYSA-N 0.000 description 2
- RYHBNJHYFVUHQT-UHFFFAOYSA-N 1,4-Dioxane Chemical compound C1COCCO1 RYHBNJHYFVUHQT-UHFFFAOYSA-N 0.000 description 2
- HNURKXXMYARGAY-UHFFFAOYSA-N 2,6-Di-tert-butyl-4-hydroxymethylphenol Chemical compound CC(C)(C)C1=CC(CO)=CC(C(C)(C)C)=C1O HNURKXXMYARGAY-UHFFFAOYSA-N 0.000 description 2
- NXXYKOUNUYWIHA-UHFFFAOYSA-N 2,6-Dimethylphenol Chemical compound CC1=CC=CC(C)=C1O NXXYKOUNUYWIHA-UHFFFAOYSA-N 0.000 description 2
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- GZVHEAJQGPRDLQ-UHFFFAOYSA-N 6-phenyl-1,3,5-triazine-2,4-diamine Chemical compound NC1=NC(N)=NC(C=2C=CC=CC=2)=N1 GZVHEAJQGPRDLQ-UHFFFAOYSA-N 0.000 description 2
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- KZMGYPLQYOPHEL-UHFFFAOYSA-N Boron trifluoride etherate Chemical compound FB(F)F.CCOCC KZMGYPLQYOPHEL-UHFFFAOYSA-N 0.000 description 2
- MUXOBHXGJLMRAB-UHFFFAOYSA-N Dimethyl succinate Chemical compound COC(=O)CCC(=O)OC MUXOBHXGJLMRAB-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- 238000005481 NMR spectroscopy Methods 0.000 description 2
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- MBHRHUJRKGNOKX-UHFFFAOYSA-N [(4,6-diamino-1,3,5-triazin-2-yl)amino]methanol Chemical compound NC1=NC(N)=NC(NCO)=N1 MBHRHUJRKGNOKX-UHFFFAOYSA-N 0.000 description 2
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- 229910001420 alkaline earth metal ion Inorganic materials 0.000 description 2
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- XITRBUPOXXBIJN-UHFFFAOYSA-N bis(2,2,6,6-tetramethylpiperidin-4-yl) decanedioate Chemical compound C1C(C)(C)NC(C)(C)CC1OC(=O)CCCCCCCCC(=O)OC1CC(C)(C)NC(C)(C)C1 XITRBUPOXXBIJN-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
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- 150000004985 diamines Chemical class 0.000 description 2
- SBZXBUIDTXKZTM-UHFFFAOYSA-N diglyme Chemical compound COCCOCCOC SBZXBUIDTXKZTM-UHFFFAOYSA-N 0.000 description 2
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- WBJINCZRORDGAQ-UHFFFAOYSA-N formic acid ethyl ester Natural products CCOC=O WBJINCZRORDGAQ-UHFFFAOYSA-N 0.000 description 2
- 150000008282 halocarbons Chemical class 0.000 description 2
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 description 2
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- 238000005259 measurement Methods 0.000 description 2
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- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 2
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- PYOKUURKVVELLB-UHFFFAOYSA-N trimethyl orthoformate Chemical compound COC(OC)OC PYOKUURKVVELLB-UHFFFAOYSA-N 0.000 description 2
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- RKMGAJGJIURJSJ-UHFFFAOYSA-N 2,2,6,6-Tetramethylpiperidine Substances CC1(C)CCCC(C)(C)N1 RKMGAJGJIURJSJ-UHFFFAOYSA-N 0.000 description 1
- SIJBDWPVNAYVGY-UHFFFAOYSA-N 2,2-dimethyl-1,3-dioxolane Chemical compound CC1(C)OCCO1 SIJBDWPVNAYVGY-UHFFFAOYSA-N 0.000 description 1
- ROSFUFIOLRQOON-UHFFFAOYSA-N 2,4-Dimethyl-1,3-dioxolane Chemical compound CC1COC(C)O1 ROSFUFIOLRQOON-UHFFFAOYSA-N 0.000 description 1
- GJDRKHHGPHLVNI-UHFFFAOYSA-N 2,6-ditert-butyl-4-(diethoxyphosphorylmethyl)phenol Chemical compound CCOP(=O)(OCC)CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 GJDRKHHGPHLVNI-UHFFFAOYSA-N 0.000 description 1
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- DHWBZGRLPSANQY-UHFFFAOYSA-N tris(2,3,5-trifluorophenyl)borane Chemical compound FC1=CC(F)=C(F)C(B(C=2C(=C(F)C=C(F)C=2)F)C=2C(=C(F)C=C(F)C=2)F)=C1 DHWBZGRLPSANQY-UHFFFAOYSA-N 0.000 description 1
- ZZFFKVGKFDZUQX-UHFFFAOYSA-N tris(2,3,6-trifluoro-4-methylphenyl)borane Chemical compound FC1=C(F)C(C)=CC(F)=C1B(C=1C(=C(F)C(C)=CC=1F)F)C1=C(F)C=C(C)C(F)=C1F ZZFFKVGKFDZUQX-UHFFFAOYSA-N 0.000 description 1
- QAQWUSSXHIRODP-UHFFFAOYSA-N tris(2,3,6-trifluoro-5-methoxyphenyl)borane Chemical compound COC1=CC(F)=C(F)C(B(C=2C(=C(OC)C=C(F)C=2F)F)C=2C(=C(OC)C=C(F)C=2F)F)=C1F QAQWUSSXHIRODP-UHFFFAOYSA-N 0.000 description 1
- DPMRGSOQMBLRBZ-UHFFFAOYSA-N tris(2,4,6-trifluoro-3-methoxyphenyl)borane Chemical compound COC1=C(F)C=C(F)C(B(C=2C(=C(OC)C(F)=CC=2F)F)C=2C(=C(OC)C(F)=CC=2F)F)=C1F DPMRGSOQMBLRBZ-UHFFFAOYSA-N 0.000 description 1
- UHDFGDWYOZQYHY-UHFFFAOYSA-N tris(2,4,6-trifluoro-3-methylphenyl)borane Chemical compound CC1=C(F)C=C(F)C(B(C=2C(=C(C)C(F)=CC=2F)F)C=2C(=C(C)C(F)=CC=2F)F)=C1F UHDFGDWYOZQYHY-UHFFFAOYSA-N 0.000 description 1
- UZKMYLFIPNYSRT-UHFFFAOYSA-N tris(2,4-difluoro-5-methoxyphenyl)borane Chemical compound C1=C(F)C(OC)=CC(B(C=2C(=CC(F)=C(OC)C=2)F)C=2C(=CC(F)=C(OC)C=2)F)=C1F UZKMYLFIPNYSRT-UHFFFAOYSA-N 0.000 description 1
- MUDVEGNBCFIRDK-UHFFFAOYSA-N tris(2,4-difluoro-5-methylphenyl)borane Chemical compound C1=C(F)C(C)=CC(B(C=2C(=CC(F)=C(C)C=2)F)C=2C(=CC(F)=C(C)C=2)F)=C1F MUDVEGNBCFIRDK-UHFFFAOYSA-N 0.000 description 1
- SIBVKDZXLXFOGI-UHFFFAOYSA-N tris(2,4-difluoro-6-methoxyphenyl)borane Chemical compound COC1=CC(F)=CC(F)=C1B(C=1C(=CC(F)=CC=1F)OC)C1=C(F)C=C(F)C=C1OC SIBVKDZXLXFOGI-UHFFFAOYSA-N 0.000 description 1
- XFDAMADSSAELOR-UHFFFAOYSA-N tris(2,6-difluoro-3-methoxyphenyl)borane Chemical compound COC1=CC=C(F)C(B(C=2C(=C(OC)C=CC=2F)F)C=2C(=C(OC)C=CC=2F)F)=C1F XFDAMADSSAELOR-UHFFFAOYSA-N 0.000 description 1
- BJDZTCMHKGMRPE-UHFFFAOYSA-N tris(2,6-difluoro-3-methylphenyl)borane Chemical compound CC1=CC=C(F)C(B(C=2C(=C(C)C=CC=2F)F)C=2C(=C(C)C=CC=2F)F)=C1F BJDZTCMHKGMRPE-UHFFFAOYSA-N 0.000 description 1
- BPKWIPVVSDWONU-UHFFFAOYSA-N tris(2,6-difluoro-4-methoxyphenyl)borane Chemical compound FC1=CC(OC)=CC(F)=C1B(C=1C(=CC(OC)=CC=1F)F)C1=C(F)C=C(OC)C=C1F BPKWIPVVSDWONU-UHFFFAOYSA-N 0.000 description 1
- IMIISQORDQFNGM-UHFFFAOYSA-N tris(3,4,6-trifluoro-2-methylphenyl)borane Chemical compound CC1=C(F)C(F)=CC(F)=C1B(C=1C(=C(F)C(F)=CC=1F)C)C1=C(F)C=C(F)C(F)=C1C IMIISQORDQFNGM-UHFFFAOYSA-N 0.000 description 1
- WOYCSOYNSACHJE-UHFFFAOYSA-N tris(3,5-difluoro-2-methoxyphenyl)borane Chemical compound COC1=C(F)C=C(F)C=C1B(C=1C(=C(F)C=C(F)C=1)OC)C1=CC(F)=CC(F)=C1OC WOYCSOYNSACHJE-UHFFFAOYSA-N 0.000 description 1
- 235000021122 unsaturated fatty acids Nutrition 0.000 description 1
- 150000004670 unsaturated fatty acids Chemical class 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Images
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- C08G2/00—Addition polymers of aldehydes or cyclic oligomers thereof or of ketones; Addition copolymers thereof with less than 50 molar percent of other substances
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- C08G65/34—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives
- C08G65/38—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives derived from phenols
- C08G65/40—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives derived from phenols from phenols (I) and other compounds (II), e.g. OH-Ar-OH + X-Ar-X, where X is halogen atom, i.e. leaving group
- C08G65/4012—Other compound (II) containing a ketone group, e.g. X-Ar-C(=O)-Ar-X for polyetherketones
- C08G65/4018—(I) or (II) containing halogens other than as leaving group (X)
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- C08G65/34—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives
- C08G65/38—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives derived from phenols
- C08G65/40—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives derived from phenols from phenols (I) and other compounds (II), e.g. OH-Ar-OH + X-Ar-X, where X is halogen atom, i.e. leaving group
- C08G65/4012—Other compound (II) containing a ketone group, e.g. X-Ar-C(=O)-Ar-X for polyetherketones
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- C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
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Definitions
- the present invention relates to an oxymethylene copolymer resin composition using a boron trifluoride compound, an arylboron fluoride compound and a layered double hydroxide, and a method for producing the same.
- the oximethylene polymer is also called polyacetal, and includes a homopolymer obtained by polymerizing formaldehyde and a copolymer obtained by polymerizing a cyclic oligomer such as trioxane and a comonomer.
- the oxymethylene polymer has an excellent balance of mechanical properties, chemical resistance, slidability, etc., and is easy to process. Therefore, as a typical engineering plastic, it is widely used mainly for electric / electronic parts, automobile parts and other various mechanical parts.
- Patent Document 1 describes (a) trioxane, (b) cyclic ether and / or cyclic polymer and (c) 3.
- a method for producing a polyacetal copolymer in which a polymerization catalyst is added after mixing a secondary amine compound is disclosed.
- a large amount of a tertiary amine compound is added as a polymerization activity control agent before the catalyst is added and mixed with the monomer to suppress vaporization of the unreacted monomer and to suppress the vaporization of the unreacted monomer to obtain a polyacetal copolymer in high yield.
- To manufacture however, from the viewpoint of producing a high molecular weight oximethylene copolymer in a high yield, it has been required to establish a method different from the production method of Patent Document 1.
- Patent Document 2 describes 100 parts by mass of a polyacetal resin (A), 0.001 to 5.0 parts by mass of an organic phosphoric acid compound (B), and 0.001 to 5.0 parts by mass of a layered double hydroxide (C). Discloses a polyacetal resin composition comprising and. However, the polyacetal resin composition of Patent Document 2 has room for improvement in terms of degree of polymerization, yield, and odor.
- Japanese Patent Application No. 2019-108702 which is a patent application by the present inventors, relates to a method for producing an oximethylene polymer, which comprises polymerizing a cyclic oligomer of formaldehyde to produce an oximethylene polymer.
- a boron trifluoride compound (A) and an arylboron fluoride compound (B) are used as a polymerization catalyst.
- the production method of Japanese Patent Application No. 2019-108702 can produce an oximethylene polymer having a high degree of polymerization with high efficiency and can suppress the generation of odor, but there is room for improvement.
- a resin composition containing an oximethylene copolymer having a high degree of polymerization can be produced in a high yield, and further, an oxymethylene copolymer resin composition in which odor generation is suppressed when a molded product is produced can be produced. I've been waiting for a way to do it.
- An- indicates an n-valent anion and may contain a plurality of anions. Further, x is in the range of 0 ⁇ x ⁇ 6.0, n is an integer of 1 to 3, and y and z are numbers of 0 or more.
- ⁇ [2] The oxymethylene according to the above [1], wherein the content of the (iii) layered double hydroxide is 0.003 to 1 part by mass per 100 parts by mass of the (i) oxymethylene copolymer. Polymer resin composition.
- the molar ratio B1 / B2 of the amount of boron (B1) derived from the (iii') fluoride arylboron compound to the amount of boron derived from the boron trifluoride compound (B2) is 0.0001 to 0.
- the (i) oxymethylene copolymer contains 0.01 to 0.3 parts by mass of the (v) nitrogen-containing compound per 100 parts by mass.
- Oxymethylene copolymer resin composition [10] The oxymethylene copolymer resin composition according to the above [9], wherein the (v) nitrogen-containing compound is at least one selected from the group consisting of an amino-substituted triazine compound, a polyamide resin, and a hindered amine compound. ..
- the reaction product comprises (iii) a step of adding a layered double hydroxide represented by the following general formula (1).
- the oximethylene copolymer resin composition is characterized in that the amount of the (iii) layered double hydroxide added is 0.003 to 1 part by mass per 100 parts by mass of the (i) oxymethylene copolymer.
- Manufacturing method [(M 2+ ) x (M 3+ ) y (OH) 2 (x + y) ] ( Ann- ) x / n ⁇ z (H 2 O) (1) ⁇ In formula (1), M 2+ represents a divalent metal ion. M 3+ represents a trivalent metal ion.
- An- indicates an n-valent anion and may contain a plurality of anions.
- x is in the range of 0 ⁇ x ⁇ 6.0.
- n is an integer of 1 to 3.
- y and z are numbers of 0 or more.
- [15]- [14] The method for producing an oxymethylene copolymer resin composition according to any one of [14].
- the reaction initiator mixture is prepared by previously mixing the (ii') fluoride arylboron compound and the (ii'') boron trifluoride compound, and the reaction initiator mixture is used.
- [17] The method for producing an oxymethylene copolymer resin composition according to any one of the above [11] to [16], wherein the (iii) layered double hydroxide is hydrotalcite.
- the production method of the present invention can produce a resin composition containing an oximethylene copolymer having a high degree of polymerization in a high yield. Further, the oxymethylene copolymer resin composition of the present invention suppresses the generation of odor from the obtained molded product when it is used for molding, especially when it is used for molding after being stored in a high temperature and high humidity environment. There is.
- the 1H-NMR spectrum of the sample obtained in Example 2 is shown.
- the mass chromatogram of the sample obtained in Example 2 is shown.
- the mass chromatogram of tris (pentafluorophenyl) borane trihydrate in hexafluoroisopropanol / methanol solution is shown.
- the XRD pattern of the sample obtained in Example 2 is shown.
- the XRD pattern of the calcined product of magnesium hydroxide, the calcined product of aluminum monostearate, the calcined product of a mixture of magnesium hydroxide and aluminum monostearate, and the calcined product of hydrotalcite is shown.
- the present invention relates to a method for producing a resin composition containing an oximethylene copolymer (hereinafter, may be referred to as an oximethylene copolymer resin composition) (hereinafter, may be referred to as a production method of the present invention).
- trioxane which is a cyclic trimer of formaldehyde, is used as the (i') main monomer.
- the trioxane is not particularly limited as long as it is a cyclic trimer of formaldehyde, and may be a commercially available product or may be produced by a conventionally known production method. Further, the method for producing trioxane is not particularly limited.
- Trioxane may contain water, formic acid, methanol, and formaldehyde as impurities that are inevitably generated during industrial production, but trioxane containing these impurities can also be used.
- the total amount of water, formic acid, methanol, and formaldehyde in the trioxane is preferably 500 mass ppm or less, more preferably 450 mass ppm or less, and more preferably 400 mass ppm or less in the trioxane.
- the content of water is preferably 200 mass ppm or less, more preferably 100 mass ppm or less, and particularly preferably 50 mass ppm or less. If there are too many impurities, problems such as a decrease in the degree of polymerization and the generation of odor from the oximethylene copolymer product may occur.
- Examples of the cyclic ether or cyclic formal having at least one carbon-carbon bond include 1,3-dioxolane, 2-ethyl-1,3-dioxolane, 2-propyl-1,3-dioxolane, and 2-butyl-1,3.
- the blending amount of the comonomer may be appropriately determined according to the type of comonomer, the physical properties of (i) the oxymethylene copolymer, which is the final target product, and (i') 0.1 by mass with respect to 100 parts by mass of trioxane. An amount of up to 20 parts by mass, particularly 1 to 15 parts by mass is preferable.
- reaction initiator In the production method of the present invention, two types of reaction initiators are used: (iii') arylboron fluoride compound and (ii'') boron trifluoride compound. (Ii'') When only the boron trifluoride compound is used, it is difficult to achieve both high molecular weight and high yield of the oximethylene copolymer. However, by combining the (iii'') boron trifluoride compound with the (ii') arylboron fluoride compound, which is a highly active reaction initiator, it is possible to achieve both high molecular weight and high yield. It is also possible to suppress an increase in molding odor (odor generated from the molded body).
- the yield is high, it is possible to save raw materials and energy by improving production efficiency, and it is possible to reduce the manufacturing cost.
- by increasing the amount of the chain transfer agent it is possible to further increase the production amount while ensuring the production stability in the polymerization step. More specifically, in general, when an attempt is made to increase the production amount of the polymerization step in the same manufacturing apparatus, the heat removal cannot keep up with the rate at which the reaction heat at the time of polymerization increases. As a result, there are inconveniences such as easy progress of side reactions and difficulty in increasing the degree of polymerization, and the MFR of the product increases, so that the amount of the chain transfer agent used is reduced.
- the amount of the chain transfer agent used becomes close to zero, the production amount cannot be expected to increase any more, and the degree of polymerization of the product cannot be adjusted. It will not be possible to meet the demand for growth.
- the amount of the chain transfer agent can be increased by using two specific types of reaction initiators, and there is a problem of production stability such that the progress of side reactions and the degree of polymerization are difficult to increase. A further increase in production can be achieved while avoiding it.
- oxymethylene can be used particularly in a high temperature and high humidity environment.
- the amount of odor generated from the obtained molded product can be effectively suppressed.
- Examples of the (ii') fluoride arylboron compound include tris (pentafluorophenyl) borane, bis (pentafluorophenyl) fluoroboran, pentafluorophenyl difluoroboran, and tris (2,3,4,5-tetrafluorophenyl).
- the (iii') fluoride arylboron compound is at least one selected from the group consisting of tris (pentafluorophenyl) borane, bis (pentafluorophenyl) fluoroborane and pentafluorophenyl difluoroborane, and hydrates thereof. It is preferable to use seeds.
- the amount of the (ii') fluoride arylboron compound to be used may be appropriately determined according to the polymerization conditions and the like, but the lower limit is 1 ⁇ 10-8 mol with respect to 1 mol of the (i') trioxane. It is preferably 5 ⁇ 10 -8 mol, more preferably 1 ⁇ 10 -7 mol, and particularly preferably 1 ⁇ 10 -7 mol.
- the upper limit is preferably 1 ⁇ 10 -5 mol, particularly preferably 5 ⁇ 10 -6 mol, particularly preferably 1 ⁇ 10 -6 mol, relative to 1 mol of (i') trioxane. ..
- the boron trifluoride compound is a compound represented by the formula BF 3. ( ⁇ ) m .
- m represents 0 or 1.
- ⁇ represents an alkyl ether having 2 to 20 carbon atoms, tetrahydrofuran, or phenol.
- ⁇ is at least one selected from the group consisting of dimethyl ether, diethyl ether and dibutyl ether.
- the amount of the (ii'') boron trifluoride compound to be used may be appropriately determined according to the polymerization conditions and the like, but the lower limit is generally 1 ⁇ 10-6 with respect to 1 mol of (i') trioxane. It is mol, preferably 1 ⁇ 10-5 mol.
- the upper limit is generally 1 ⁇ 10 -3 mol, preferably 1 ⁇ 10 -4 mol, relative to 1 mol of (i') trioxane.
- the ratio of the (ii') arylboron fluoride compound to the (ii'') boron trifluoride compound may be appropriately determined according to the MFR and the like of the oxymethylene copolymer which is the final target, but the molar ratio.
- the (ii') arylboron trifluoride compound is 0.0001 or more, particularly 0.001 or more, with respect to the (ii'') boron trifluoride compound.
- the upper limit value it is preferable that the (ii') arylboron fluoride compound is less than 1 with respect to the (iii') boron trifluoride compound, particularly 0.1 or less.
- reaction initiators are used without further using other reaction initiators, a high degree of polymerization and a high yield can be achieved, and the amount of odor generated when the molded product is formed.
- reaction initiators may be used in combination in addition to the above two types of reaction initiators, if necessary.
- the (ii') arylboron fluoride compound and the (ii'') boron trifluoride compound may be individually added to the reaction system, but they are mixed in advance to prepare a reaction initiator mixture, and the reaction is carried out. It is preferable to use the initiator mixture for the polymerization reaction.
- the other reaction initiators may be mixed together or not. May be good.
- the (ii') fluoride arylboron compound and the (ii'') boron trifluoride compound are premixed to obtain the (ii') fluoride arylboron compound (iii'') trifluoride. It is preferable to generate a reaction initiator complex coordinated with the boron compound and use a reaction initiator mixture containing such a reaction initiator complex. This is because it is inferred that the Lewis acidity of the (ii ′′) boron trifluoride compound is enhanced by the coordination.
- layered double hydroxide is further used.
- the layered double hydroxide is represented by the following formula (1). [(M 2+ ) x (M 3+ ) y (OH) 2 (x + y) ] ( Ann- ) x / n ⁇ z (H 2 O) (1)
- M 2+ represents a divalent metal ion.
- M 3+ represents a trivalent metal ion.
- An- indicates an n-valent anion and may contain a plurality of anions.
- x is in the range of 0 ⁇ x ⁇ 6.0.
- n is an integer of 1 to 3.
- y and z are numbers of 0 or more.
- Examples of the divalent metal ion (M 2+ ) include alkaline earth metal ion (Mg 2+, etc.), Mn 2+ , Fe 2+ , Co 2+ , Ni 2+ , Cu 2+ , and Zn 2+ .
- Examples of the trivalent metal ion (M 3+ ) include Al 3+ , Fe 3+ , Cr 3+ , Co 3+ , and In 3+ .
- n-valent anion (A n-), OH -, F -, Cl -, Br -, NO 3 -, CO 3 2-, SO 4 2-, Fe (CN) 6 3-, CH 3 COO - , Oxalate ion, salicylic acid ion and the like.
- the divalent metal ion (M 2+ ) in the above general formula (1) is an alkaline earth metal ion, and the trivalent metal ion (M 3+ ) is Al.
- a 3+, n-valent anion (a n-) is CO 3 2- and / or OH - is, it is preferred that the hydrotalcite.
- the divalent metal ion (M 2+ ) in the above general formula (1) is Mg 2+
- the trivalent metal ion (M 3+ ) is Al 3+
- (A n-) is CO 3 2- and / or OH - compounds represented by is particularly preferred.
- hydrotalcite examples include Mg 4.5 Al 2 (Mg 4.5 Al 2), which is a natural hydrotalcite represented by Mg 1.5 Al 0.5 (OH) 4 (CO 3 ) 0.75 / 1.0H 2 O. can be exemplified synthetic hydrotalcite represented by OH) 13 CO 3 ⁇ 1.5H 2 O. Hydrotalcite, it can be a commercially available product, for example, Clariant Chemicals Inc., may use the Hycite (registered trademark) 713 (Mg 4 Al 2 ( OH) 12 CO 3 ⁇ 1.5H 2 O) can.
- the present invention by using the (iii) layered double hydroxide, it is possible to suppress the generation of odors such as formaldehyde from the molded product obtained by using the oxymethylene copolymer resin composition.
- it is excellent in that it can suppress the generation of odor from the molded product obtained by using the oxymethylene copolymer resin composition stored not only in a normal environment but also in a high temperature and high humidity environment.
- the present inventors infer as follows. First, one of the reasons why an odor is generated from a molded product obtained from an oximethylene copolymer resin composition is that a side reaction during production of the resin composition affects a part of the structure of the resin, and the structure is affected during storage.
- (iii) layered double hydroxide is provided together with (iii') boron fluoride arylboron compound and (ii'') boron trifluoride compound.
- the amount of the (ii) layered double hydroxide added is 0.003 to 1 part by mass per 100 parts by mass of the (i) oxymethylene copolymer. Preferably, it is 0.003 to 0.6 parts by mass, 0.004 to 0.6 parts by mass, or 0.005 to 0.5 parts by mass. More preferably, it is 0.005 to 0.2 parts by mass, and particularly preferably 0.01 to 0.2 parts by mass. (Iii) By setting the addition amount of the layered double hydroxide within the above range, the generation of odor can be effectively suppressed.
- (iv) a hindered phenolic antioxidant As another material, it is preferable to use (iv) a hindered phenolic antioxidant.
- the hindered phenol-based antioxidant is not particularly limited as long as it is a hindered phenol compound having an antioxidant effect on the oxymethylene copolymer, and is, for example, 2,2'-methylene-bis (4-methyl-6).
- One of these hindered phenol compounds may be used alone, or two or more thereof may be used in combination.
- 1,3,5-trimethyl-2,4,6-tris (3,5-di-t-butyl-4-hydroxybenzyl) benzene, pentaerythritol-tetrakis [3- (3,5-) Di-t-butyl-4-hydroxyphenyl) propionate] triethylene glycol-bis [3- (3-t-butyl-4-hydroxy-5-methylphenyl) propionate] are preferable, and triethylene glycol-bis [3 -(3-t-Butyl-4-hydroxy-5-methylphenyl) propionate] is particularly preferable.
- the amount of (iv) hindered phenolic antioxidant added may be appropriately determined depending on the type and amount of other materials, but is preferably 0.01 per 100 parts by mass of (i) oximethylene copolymer. It is about 1 part by mass, more preferably 0.01 to 0.5 part by mass, and particularly preferably 0.05 to 0.5 part by mass. (Iv) If the amount of the hindered phenolic antioxidant used is too small, oxidative decomposition of the oxymethylene copolymer may occur, and odor may be easily generated not only at the time of production but also from the molded product. (Iv) If the amount of the hindered phenolic antioxidant used is too large, there is a risk of mold contamination.
- the nitrogen-containing compound is not particularly limited, and examples thereof include an amino-substituted triazine compound, a polyamide resin, a hindered amine compound, and a dicarboxylic acid hydrazide. Among these, at least one selected from the group consisting of an amino-substituted triazine compound, a polyamide resin, and a hindered amine compound is preferable, and an amino-substituted triazine compound is particularly preferable. Further, these nitrogen-containing compounds may be used alone or in combination of two or more.
- the amino-substituted triazine compound is not particularly limited, and is, for example, guanamine, melamine, N-butyl melamine, N-phenyl melamine, N, N-diphenyl melamine, N, N-diallyl melamine, N, N', N''-.
- Triphenyl melamine, N, N', N''-methylol melamine such as trimethylol melamine, alkylated melamines such as hexamethoxymethyl melamine, benzoguanamine, 2,4-diamino-6-methyl-sim-triazine, 2, 4-Diamino-6-butyl-sim-triazine, 2,4-diamino-6-benzyloxy-sim-triazine, 2,4-diamino-6-butoxy-sim-triazine, 2,4-diamino-6-cyclohexyl -Sym-triazine, 2,4-diamino-6-chloro-sym-triazine, 2,4-diamino-6-mercapto-sim-triazine, amerin (N, N, N', N''-tetracyanoethylbenzoguanamine) And so on.
- melamine methylol melamine, alkylated melamine, benzoguanamine, and water-soluble melamine-formaldehyde resins are preferred.
- the above-mentioned amino-substituted triazine compound may be used alone or in combination of two or more. These amino-substituted triazine compounds are used as heat stabilizers.
- the polyamide resin is not particularly limited as long as it is a resin having two or more amide bonds in the molecule, but for example, nylon-6, nylon-6,6, nylon-6,10, ternary copolymers thereof, and polymerization.
- examples thereof include fatty acid-based polyamide resins and polyamide elastomers. Of these, polymerized fatty acid-based polyamide resins or polyamide elastomers are particularly preferred.
- One type of these polyamide resins may be used alone, or two or more types may be used in combination.
- the polymerized fatty acid-based polyamide resin refers to a polyamide resin composed of a polycondensate of a polymerized fatty acid and a diamine.
- the polymerized fatty acid is a polymer of unsaturated fatty acid or obtained by hydrogenating this polymer, and the polymerized fatty acid has, for example, 10 to 24 carbon atoms and has a double bond or a triple bond.
- Examples thereof include a dimer of a monobasic fatty acid having one or more (dimeric acid) or a hydrogenated product thereof.
- Examples of the dimer acid include dimers such as oleic acid, linoleic acid and erucic acid.
- diamine examples include hexamethylenediamine, heptamethylenediamine, octamethylenediamine, decamethylenediamine, and methoxylylenediamine.
- the polyamide elastomer refers to a polyamide resin having a hard segment and a soft segment, in which the hard segment is composed of polyamide and the soft segment is composed of a polymer other than polyamide.
- the polyamide constituting the hard segment include nylon-6, nylon-6,6, nylon-6,10, ternary copolymers thereof, polymerized fatty acid-based polyamide resin and the like.
- polymers other than polyamide include aliphatic polyesters and aliphatic polyethers.
- Examples of the aliphatic polyester include poly ( ⁇ -caprolactone), polyethylene adipate, polybutylene adipate and polybutylene succinate.
- the aliphatic polyether include polyoxyalkylene glycols such as polyethylene oxide and polypropylene oxide.
- the hindered amine compound is not particularly limited, but for example, N, N', N'', N''-tetrakis- (4,6-bis- (butyl- (N-methyl-2,2,6,6-) Tetramethylpiperidin-4-yl) amino) -triazine-2-yl) -4,7-diazadecan-1,10-diamine, dibutylamine 1,3,5-triazine N, N'-bis (2, Polycondensate of 2,6,6-tetramethyl-4-piperidyl-1,6-hexamethylenediamine and N- (2,2,6,6-tetramethyl-4-piperidyl) butylamine (BASF, Chimassorb (registered) Trademark) 2020FDL), Poly [ ⁇ 6- (1,1,3,3-tetramethylbutyl) amino-1,3,5-triazine-2,4-diyl ⁇ ⁇ (2,2,6,6-tetra) Methyl-4-piperidyl
- the amount of (v) the nitrogen-containing compound added may be appropriately determined depending on the type and amount of other materials, but is preferably 0.01 to 0.3 per 100 parts by mass of (i) oxymethylene copolymer. It is by mass, more preferably 0.01 parts by mass or more and less than 0.3 parts by mass, and particularly preferably 0.01 to 0.1 parts by mass.
- V If the amount of the nitrogen-containing compound used is too small, there is a risk that the viscosity may decrease and an odor, particularly an odor when stored in a high temperature and high humidity environment, may easily occur.
- the nitrogen-containing compound is excessively used, there is a possibility that an odor from the molded product, particularly an odor from the molded product when molding is performed after storage in a high temperature and high humidity environment, is likely to occur.
- a chain transfer agent (also referred to as a molecular weight adjusting agent) may be used as another material from the viewpoint of adjusting the degree of polymerization.
- the type of the chain transfer agent is not particularly limited, and examples thereof include carboxylic acids, carboxylic acid anhydrides, esters, amides, imides, phenols, acetal compounds, and the like, particularly phenol, 2,6-dimethylphenol, and the like.
- Preferably used are methylal, polyacetal dimethoxydo, methoxymethylal, dimethoxymethylal, trimethoxymethylal, and oxymethylenedi-n-butyl ether. The most preferable of these is methylal.
- the chain transfer agent can be used by diluting it with a solvent inert to the polymerization reaction, if necessary.
- the amount of the chain transfer agent added may be appropriately determined according to the desired MFR. Generally, it is adjusted in the range of 0.5% by mass or less, preferably 0.3% by mass or less, based on the (i') trioxane in the polymerization raw material.
- the lower limit of the addition amount is not particularly limited, and may be more than 0% by mass.
- the chain transfer agent does not necessarily have to be used, and if it is not used, the amount of the chain transfer agent added is, of course, 0% by mass.
- the solvent may be an aliphatic hydrocarbon such as hexane, heptane or cyclohexane; an aromatic hydrocarbon such as benzene, toluene or xylene; methylenedichloride, Halogenated hydrocarbons such as ethylene dichloride; carboxylic acid esters such as methyl formate, ethyl formate, methyl acetate; low molecular weight ketones such as acetone, 2-butanone, 2-pentanone, 3-pentanone; 1,2-dimethoxyethane, Examples thereof include ethers such as diethylene glycol dimethyl ether, 1,4-dioxane and n-butyl ether. Among them, although not essential in the production method of the present invention, a solvent having a boiling point of 115 ° C. or lower at 1 atm is preferable from the viewpoint of removing from the produced oxym
- both oxymethylene and oxymethylene are used under the same conditions except that the (ii') arylboron fluoride compound and the (iii'') boron trifluoride compound are not used as the reaction initiator. It is possible to increase the amount of the chain transfer agent by 10 to 40% by mass as compared with the case of producing the polymer. If the amount of the chain transfer agent exceeds the usable amount, a phenomenon occurs in which the MFR of the obtained oximethylene copolymer becomes larger than the desired value.
- the upper limit of the usable amount of the chain transfer agent can be determined. For example, it can be determined that the amount of the chain transfer agent used at the time when the MFR becomes a value larger than 120% of the desired value is the upper limit of the usable amount. Similarly, when the amount of the chain transfer agent is less than the usable amount, the phenomenon that the MFR of the obtained oxymethylene copolymer becomes smaller than the desired value occurs, so by confirming the presence or absence of this phenomenon, , The lower limit of the usable amount of the chain transfer agent can be determined. For example, the amount of the chain transfer agent used when the MFR becomes less than 80% of the desired value can be determined as the lower limit of the usable amount.
- ⁇ Polymerization reaction> In the production method of the present invention, (i') trioxane, (i'') comonomer, and reaction initiator ⁇ (ii') fluoride arylboron compound and (ii'') boron trifluoride compound ⁇ are used. Carry out a polymerization reaction.
- the form of the polymerization reaction is not particularly limited, and can be carried out in the same manner as the conventionally known method for producing an oxymethylene copolymer. Any of bulk polymerization, suspension polymerization, solution polymerization, or melt polymerization may be preferable, and bulk polymerization is particularly preferable.
- Bulk polymerization is a polymerization method that uses a monomer in a molten state and substantially does not use a solvent. In bulk polymerization, as the polymerization progresses, the polymer crystallizes in the monomer mixed solution, and eventually the entire system is bulked and powdered to obtain a solid polymer. The polymerization is carried out in the absence of oxygen, preferably in a nitrogen atmosphere.
- the polymer used for the polymerization reaction is not particularly limited.
- a reaction tank with a stirrer which is generally used in the production of an oximethylene copolymer in the batch type, is used, and a conider, two in the continuous type.
- Continuous polymerization equipment such as trioxane, which has been proposed so far, such as a shaft screw type continuous extrusion mixer and a twin shaft paddle type continuous mixer can be used. It is also possible to use a combination of a plurality of polymerization machines.
- the method of supplying or adding the raw materials such as (i') trioxane, (i'') comonomer, and the reaction initiator used in the polymerization reaction to the polymerization apparatus is not particularly limited, but the above-mentioned raw materials are used in the polymerization machine. It may be merged at the inlet and introduced into the polymerization machine to proceed with the polymerization reaction. After mixing some raw materials in advance, the remaining raw materials may be merged with the remaining raw materials at the entrance of the polymerization machine and introduced into the polymerization machine to proceed with the polymerization reaction. May be good.
- a part or all of the raw materials are sufficiently mixed while maintaining the liquid phase state in advance, and the obtained raw material mixture is supplied to the polymerization apparatus, and if there is a remaining raw material, the remaining raw materials are also supplied to carry out the polymerization reaction.
- This method is preferable because the amount of the reaction initiator required for the polymerization reaction can be reduced, and as a result, the amount of odor such as formaldehyde generated from the oximethylene copolymer product is reduced.
- the (ii') arylboron fluoride compound and the (iii') boron trifluoride compound are mixed in advance and used in the state of a reaction initiator mixture.
- the reaction initiator may be added directly to the reaction system, but since it can be uniformly dispersed in the reaction system, it is preferable to dilute it with an organic solvent that does not adversely affect the polymerization reaction.
- the solvent may be an aliphatic hydrocarbon such as hexane, heptane or cyclohexane; an aromatic hydrocarbon such as benzene, toluene or xylene; methylenedichloride, Halogenated hydrocarbons such as ethylene dichloride; carboxylic acid esters such as methyl formate, ethyl formate, methyl acetate; low molecular weight ketones such as acetone, 2-butanone, 2-pentanone, 3-pentanone; 1,2-dimethoxyethane, Examples thereof include ethers such as diethylene glycol dimethyl ether, 1,4-dioxane and n-butyl ether.
- the temperature of the polymerization reaction is not particularly limited and is usually 60 to 120 ° C.
- the pressure during the polymerization reaction is not particularly limited, but when the atmospheric pressure is 100 kPa, the absolute pressure is preferably in the range of 99.0 to 101.00 kPa.
- the time of the polymerization reaction (residence time in the polymerization apparatus) is not particularly limited, and is usually 2 to 30 minutes.
- the rotation speed of the stirring blade may be appropriately set, but is preferably 10 to 100 rpm, particularly preferably 20 to 60 rpm.
- the reaction product is obtained by the polymerization reaction.
- the reaction product is in a state before removing the unreacted raw material and the like, that is, (i) contains the oxymethylene copolymer and the unreacted raw material and the like.
- the content of (i) oxymethylene copolymer in the reaction product (hereinafter, may be referred to as POM content) tends to be high, preferably higher than 92%, and more. It is preferably 93.5% or more, particularly preferably 95% or more, and the upper limit is not particularly limited and is 100% by mass or less. It is preferable to control the polymerization conditions so that the POM content of the reaction product becomes these values.
- a high POM content of the reaction product means that there are few unreacted monomers and the polymerization reaction has proceeded sufficiently. Therefore, by increasing the POM content of the reaction product, it is possible to reduce the energy consumption for recovering the unreacted raw material.
- a known terminator may be mixed with the reaction system to inactivate the reaction initiator and the polymerization growth terminal, if necessary, to terminate the polymerization reaction.
- Trivalent organic phosphorus compounds such as triphenylphosphine as known terminators; alkali metal hydroxides; alkaline earth metal hydroxides; diethylamine, triethylamine, tributylamine, triethanolamine, N-methyldiethanolamine, N , N-diethylhydroxylamine, N-isopropylhydroxylamine, N, N-bisoctadecylhydroxylamine, N, N-dibenzylhydroxylamine and other amine compounds are known.
- N, N-diethylhydroxylamine is particularly preferable because it has excellent characteristics such as a reduction in the amount of formaldehyde generated from the product and a small amount of mold deposit generated during molding, and is easily available.
- the amount of the terminator added is not particularly limited as long as it is sufficient to inactivate the reaction initiator, but the molar ratio to the reaction initiator is 1.0 ⁇ 10 -1 to 1.0 ⁇ 10. Usually used in the range of 1.
- the solvent used is not particularly limited, but in addition to water and alcohols, acetone, methyl ethyl ketone, hexane, cyclohexane, heptane, benzene, toluene, etc.
- Various aliphatic and aromatic organic solvents such as xylene, methylene dichloride, and ethylene dichloride can be used.
- the device for adding and mixing the terminator and the timing of addition are not particularly limited.
- a method of adding a terminator at the inlet of the mixer and mixing the mixture can be mentioned.
- the temperature at which the terminator is added and mixed is not particularly limited, and is preferably 0 to 160 ° C, particularly preferably 0 to 120 ° C.
- the pressure is not particularly limited, but when the atmospheric pressure is 100 kPa, the absolute pressure is preferably in the range of 99.0 to 101.0 kPa.
- the time for mixing after the addition is not particularly limited, and is preferably 1 to 150 minutes, particularly preferably 1 to 120 minutes.
- the polymerization reaction has proceeded sufficiently, the polymerization termination step performed as necessary is completed, and a reaction product is obtained.
- the reaction product may be crushed with a turbo mill or the like, if necessary, after being discharged from the polymerization machine and before heat-melt kneading (before blending in the case of blending).
- the blending may be carried out by a known method, for example, using a mixer connected in series with the above-mentioned polymerization machine, which is a mixture of the product and the terminator. It may be melt-kneaded.
- the device for performing melt kneading preferably has a vent function, and such a device includes, for example, a single-screw or multi-screw continuous extrusion kneader having at least one vent hole. Examples include a surface-renewal type horizontal kneader. Each of these devices may be used alone, or two or more devices may be used in combination.
- reaction product and stabilizer are not blended in advance, it is advisable to continuously supply the stabilizer to the reaction product line.
- the reaction product and the stabilizer may be supplied to the twin-screw extruder on a separate line and heat-melt kneaded in the twin-screw extruder. It was
- layered double hydroxide is used in place of or in combination with the above stabilizer in this stabilization step.
- the layered double hydroxide may be blended with the reaction product and then heat-melted and kneaded, or may be continuously supplied to the reaction product line. What is the reaction product? It may be continuously supplied to the twin-screw extruder on another line.
- the (iii) layered double hydroxide may be added at the same time as at least one of a known stabilizer, (iv) a hindered phenolic antioxidant described below, (v) a nitrogen-containing compound and a known additive. , May be added separately.
- hindered phenol is used in this step in place of or in combination with the above stabilizer. It is preferable to use a system antioxidant or (v) nitrogen-containing compound.
- the (iv) hindered phenolic antioxidant or (v) nitrogen-containing compound may be blended with the reaction product and then heat-melt-kneaded and continuously supplied to the reaction product line. Alternatively, it may be continuously supplied to the twin-screw extruder on a line separate from the reaction product.
- the (iv) hindered phenolic antioxidant or (v) nitrogen-containing compound may be added simultaneously with at least one of known stabilizers, (iii) layered double hydroxides and known additives described below. It may be added separately.
- Examples of known stabilizers used in this step include antioxidants other than hindered phenolic antioxidants; formaldehyde scavengers; acid supplements and the like.
- the known stabilizer may be added simultaneously with at least one of (iii) layered double hydroxides, (iv) hindered phenolic antioxidants, (v) nitrogen-containing compounds and known additives, or separately. It may be added.
- a known additive may be used in this step.
- known additives include inorganic fillers such as glass fibers; crystallization accelerators (nuclear agents); mold release agents; sliding agents; colorants and the like.
- the known additives may be added simultaneously with at least one of the known stabilizers, (iii) layered double hydroxides, (iv) hindered phenolic antioxidants and (v) nitrogen-containing compounds, or separately. It may be added.
- the temperature for performing melt-kneading is not particularly limited as long as it is equal to or higher than the melting point of the product obtained by the polymerization reaction, and is preferably in the temperature range of 170 ° C. or higher and 270 ° C. or lower, and more preferably 190 ° C. or higher and 250 ° C. or lower.
- the temperature of the melt-kneading is 270 ° C. or lower, the product and the oxymethylene copolymer obtained by the melt-kneading are less likely to be decomposed and deteriorated during the melt-kneading.
- the pressure at the time of melt-kneading is not particularly limited, but is volatilized under reduced pressure in order to remove the cyclic oligomer of the unreacted raw material, the formaldehyde component derived from the cyclic oligomer, the formaldehyde derived from the hemiformal terminal, and the like. It is preferable to carry out with the treatment. Decompression devolatile is performed from the vent hole described above. Therefore, when the atmospheric pressure is 100 kPa, the pressure for melt-kneading is preferably in the range of 10 to 100 kPa, more preferably in the range of 10 to 70 kPa, and particularly preferably in the range of 10 to 50 kPa.
- the rotation speed of the stirring blade during melt-kneading is preferably 50 to 200 rpm in a twin-screw extruder. In a biaxial surface renewal type horizontal kneader, 1 to 100 rpm is preferable.
- the time for performing melt-kneading is not particularly limited, and is preferably 1 to 60 minutes, particularly preferably 1 to 40 minutes.
- the target oxymethylene copolymer resin composition can be obtained.
- the above-mentioned manufacturing process is an example, and the process may be added or omitted as appropriate, and the content of each process may be changed.
- the reaction product may be pulverized, washed, separated and recovered from unreacted monomers, dried, and the like, if necessary. If purification is required, after stabilization, washing, separation and recovery of unreacted monomers, drying and the like may be performed. Further, the pellets obtained by pelletizing after the stabilization step may be melt-kneaded again.
- known additives and other materials may be used as long as the object of the present invention is not impaired.
- the above-mentioned material may be used in a process different from the above-mentioned process as long as the object of the present invention is not impaired.
- ⁇ Oxymethylene copolymer resin composition Another aspect of the present invention is an oxymethylene copolymer resin composition containing (i) an oximethylene copolymer, (ii) a derivative of an arylboron fluoride compound, and (iii) a layered double hydroxide (hereinafter referred to as “Oxymethylene copolymer resin composition”). It may be referred to as an oxymethylene copolymer resin composition of the present invention).
- the oxymethylene copolymer resin composition of the present invention uses (iii') an arylboron fluoride compound, (ii'') a boron trifluoride compound and (iii) a layered double hydroxide by any method. Although it can be produced, it is preferably produced by the production method of the present invention. Further, preferably, a reaction initiator mixture obtained by premixing (iii') an arylboron fluoride compound and (iii'') a boron trifluoride compound, and (iii) a layered compound hydroxide are used.
- the oxymethylene copolymer is a polymer compound containing an oxymethylene unit (-OCH 2- ) and an oxyalkylene unit having 2 or more carbon atoms as constituent units.
- the oxyalkylene group having 2 or more carbon atoms is not particularly limited, and is, for example, an oxyethylene (-OCH 2 CH 2- ) group, an oxypropylene (-OCH 2 CH 2 CH 2- ) group, and an oxybutylene (-OCH 2 CH). 2 CH 2 CH 2- ) groups and the like can be mentioned. Of these, an oxyethylene group (-OCH 2 CH 2- ) is preferable.
- the content of the oxyalkylene group having 2 or more carbon atoms in the oxymethylene copolymer is not particularly limited, but is 0 with respect to a total of 100 mol of the molar amount of the oxymethylene group and the molar amount of the oxyalkylene group. It is preferably 4 mol or more and 15 mol or less, more preferably 0.4 mol or more and 10 mol or less, and particularly preferably 0.4 mol or more and 5.0 mol or less.
- the content of the oxyalkylene group having 2 or more carbon atoms in the oxymethylene copolymer can be measured by 1H-NMR as shown in Examples described later.
- the arylboron fluoride compound (ii') is contained in a state of forming a derivative with other components.
- the oxymethylene copolymer resin composition of the present invention contains the (ii) arylborofluoride compound. Fluoride adducts of arylboron fluoride compounds are included.
- the oxymethylene copolymer resin composition of the present invention is produced by using a reaction initiator mixture in which (iii') an arylboron fluoride compound and (ii'') a boron trifluorine compound are mixed in advance.
- a reaction initiator mixture in which (iii') an arylboron fluoride compound and (ii'') a boron trifluorine compound are mixed in advance.
- the (ii'') boron trifluoride compound is used from the viewpoint of achieving both high molecular weight and high yield in the manufacturing process and suppressing an increase in molding odor (odor generated from the molded body).
- the molar ratio B1 / B2 of the amount of boron (B1) derived from the (ii') boron fluoride arylboron compound to the amount of boron derived (B2) is preferably 0.0001 to 0.1.
- the amount of boron (B2) derived from the (ii'') boron trifluoride compound and the amount of boron (B1) derived from the (ii') arylboron fluoride compound are measured by the methods shown in Examples described later. be able to. That is, the amount of boron (B1) derived from the (ii') arylboron fluoride compound is determined by determining the content of the derivative of the arylboron fluoride compound by LC-MS analysis and calculating the amount of boron. be able to.
- the total amount of boron (B3) in the oxymethylene copolymer resin composition of the present invention using the ICP emission spectroscopic analyzer. ), And can be determined from the difference between the total amount of boron (B3) and the amount of boron derived from the boron trifluoride compound (B1).
- the fluorinated arylborane compound is tris (pentafluorophenyl) borane, bis (pentafluorophenyl) fluoroborane and pentafluorophenyl difluoroborane, and their respective. At least one selected from the group consisting of hydrates.
- (iii) layered double hydroxide is preferably hydrotalcite, and more preferably the above general formula (1).
- the content of the (iii) layered double hydroxide in the oxymethylene copolymer resin composition of the present invention is (i) 100 mass of the oxymethylene copolymer from the viewpoint of effectively suppressing the generation of odor from the molded product. It is preferably 0.003 to 1 part by mass per part. More preferably, it is 0.003 to 0.6 parts by mass, 0.004 to 0.6 parts by mass, or 0.005 to 0.5 parts by mass. More preferably, it is 0.005 to 0.2 parts by mass, and particularly preferably 0.01 to 0.2 parts by mass.
- the oxymethylene copolymer resin composition of the present invention contains other components in addition to (i) an oxymethylene copolymer, (ii) a derivative of an arylboron fluoride compound, and (iii) a layered double hydroxide. May include. Examples of other components include other materials described in the description of the production method of the present invention or components derived from them.
- the oxymethylene copolymer resin composition of the present invention may contain (iv) a hindered phenolic antioxidant. Details of (iv) the type of the hindered phenolic antioxidant, the purpose of blending, and the like are as described in the section ⁇ (iv) Hindered phenolic antioxidant> in the description of the production method of the present invention.
- the content of the (iv) hindered phenolic antioxidant in the oxymethylene copolymer resin composition of the present invention may be 0.01 to 1 part by mass per 100 parts by mass of the (i) oxymethylene copolymer. It is preferably 0.01 to 0.5 parts by mass, more preferably 0.01 to 0.5 parts by mass.
- the oxymethylene copolymer resin composition of the present invention preferably contains (v) a nitrogen-containing compound. Details of (v) the type of the nitrogen-containing compound, the purpose of blending, and the like are as described in the section ⁇ (v) Nitrogen-containing compound> in the description of the production method of the present invention.
- the nitrogen-containing compound is preferably at least one selected from the group consisting of an amino-substituted triazine compound, a polyamide resin, and a hindered amine compound.
- the content of the (v) nitrogen-containing compound in the oxymethylene copolymer resin composition of the present invention is preferably 0.01 to 0.3 parts by mass per 100 parts by mass of the (i) oximethylene copolymer. It is more preferably 0.01 parts by mass or more and less than 0.3 parts by mass, and particularly preferably 0.01 to 0.1 parts by mass.
- the oxymethylene copolymer resin composition of the present invention can be molded into various forms according to a known molding method for the oximethylene copolymer resin composition.
- the generation of odor is suppressed from the molded product obtained from the oxymethylene copolymer resin composition of the present invention.
- Molds obtained from the oxymethylene copolymer resin composition of the present invention include, but are limited to, pellets, round bars, planks, sheets, tubes, cylindrical or rectangular containers, and the like. It's not a thing.
- the oxymethylene copolymer resin composition of the present invention and its molded product can be used as various parts such as machinery, electricity, automobiles, building materials and the like.
- parts such as machinery, electricity, automobiles, building materials and the like.
- automobile parts clothing parts, electric / electronic molded parts, information recording equipment molded parts, medical equipment molded parts, household molded parts, rotating parts such as gears, bearing members, sliding members, press-fit parts, hinge parts, etc.
- Example 1 The polymerization reaction trioxane and 1,3-dioxolane were combined to obtain a mixed fluid. At this time, the trioxane was merged at a speed of 200 kg / hr, and the comonomer 1,3-dioxolane was merged at a speed of 8.0 kg / hr. Next, the chain transfer agent, methylal (benzene solution having a methylal concentration of 33% by mass), was mixed with the mixed fluid by adjusting the amount so that the MFR was 8 g / 10 min.
- the chain transfer agent methylal (benzene solution having a methylal concentration of 33% by mass)
- reaction initiator obtained by premixing the amounts of boron trifluoride diethyl etherate (BF 3 ) and tris (pentafluorophenyl) borane trihydrate (TPB) shown in Table 1 in advance. The mixture was continuously merged to give the mixture. Immediately after, the mixture was fed to a twin-screw continuous polymerizer with a self-cleaning paddle at a temperature set to 85 ° C.
- BF 3 boron trifluoride diethyl etherate
- TPB tris (pentafluorophenyl) borane trihydrate
- the polymerization reaction was continuously carried out so that the staying time in the continuous polymerization machine was 15 minutes.
- N, N-diethylhydroxylamine (benzene solution having an N, N-diethylhydroxylamine concentration of 20% by weight) as a polymerization terminator was added into the continuous polymerization machine. .. The amount added was 4 mol with respect to 1 mol of the reaction initiator (BF 3 and TPB). After the addition, crushing was performed.
- Stabilized pulverized product (reaction product) and triethylene glycol-bis [3- (3-t-butyl-4-hydroxy-5-methylphenyl) propionate] as a hindered phenolic antioxidant (product name: IRGANOX) (Registered trademark) 245, manufactured by BASF, hydrotalcite (product name: Hydrotalcite (registered trademark) 713, manufactured by Clariant Chemicals) as a layered double hydroxide, and melamine (manufactured by Mitsui Chemicals) as a nitrogen-containing compound. was added, and premixing was performed using a Henshell mixer.
- the amounts of the hindered phenolic antioxidant, hydrotalcite, and melamine added to 100 parts by mass of the oxymethylene copolymer are as shown in Table 1.
- the melt was continuously extruded while devolatile under reduced pressure under the condition of a screw rotation speed of 100 rpm.
- the temperature of the molten resin at this time was about 250 ° C.
- Pelletization The continuously extruded molten resin was immersed in a cooling water tank as a strand and then supplied to a pelletizer for pelletization. The obtained pellets were dried in a hot air dryer at 140 ° C. for 3 hours.
- the molten resin extruded continuously was immersed as a strand in a water tank for cooling and then supplied to a pelletizer for pelletization.
- the obtained pellets were dried in a hot air dryer at 120 ° C. for 12 hours. This pellet was used as the final sample.
- Examples 2 to 7 An oxymethylene copolymer resin composition was obtained in the same manner as in Example 1 except that the amounts of hydrotalcite and melamine were set to the amounts shown in Table 1.
- Yield (%) (Yield per hour of reaction product discharged after termination of polymerization reaction (kg / hr)) ⁇ (POM content of reaction product (% by weight)) / (per hour Total amount of supplied monomer (kg / hr)
- the yield was calculated by The POM content of the reaction product in the above formula was determined by the following procedure. After the polymerization reaction of each Example and Comparative Example was stopped, a part of the reaction product was recovered and its weight (hereinafter referred to as Ag) was measured.
- ⁇ MFR> The MFR of the final sample obtained in each Example or Comparative Example was measured according to ASTM-D1238 (190 ° C., weighted by 2.16 kg). The results are shown in Tables 1 and 2. A small MFR value means a large molecular weight.
- HCHO formaldehyde
- the amount of formaldehyde (HCHO) generated from the molded product obtained using the pellets of the final sample (unit: mg / kg) was measured by the following procedure. 1) The pellet of the final sample was pre-dried at 80 ° C. for 3 hours. Then, using a SAV-30-30 molding machine manufactured by Yamashiro Co., Ltd., the test piece was molded into a disk test piece having a diameter of 50 mm and a thickness of 3 mm at a cylinder temperature of 230 ° C. 2) The obtained test piece was allowed to stand overnight in a constant temperature and humidity chamber at 23 ° C. and 50 ⁇ 5% RH.
- HCHO formaldehyde
- the amount of formaldehyde (HCHO) generated from the molded product obtained using the pellets of the final sample after storage under humidified conditions was measured by the following procedure. 1) The pellet of the final sample was stored in an environment of 80 ° C. and 98% RH for 24 hours, and then pre-dried at 80 ° C. for 4 hours. Then, using a SAV-30-30 molding machine manufactured by Yamashiro Co., Ltd., the test piece was molded into a disk test piece having a diameter of 50 mm and a thickness of 3 mm at a cylinder temperature of 230 ° C. 2) The obtained test piece was allowed to stand overnight in a constant temperature and humidity chamber at 23 ° C.
- Example 2 The final sample obtained in Example 2 was set below the glass transfer point with liquid nitrogen and pulverized with a mill to obtain a pulverized product.
- the pulverized material was sieved and powder was collected.
- the powder was weighed and dissolved in 1,1,1,3,3,3-hexafluoroisopropanol-D2 (purity 99%).
- the obtained solution was subjected to 1H-NMR analysis.
- As the NMR apparatus AVANCE III500 manufactured by BRUKER was used for identification and quantification. The results are shown in FIG. As a result of the quantification, the oxymethylene unit was 98.7 mol and the oxyethylene unit was 1.3 mol with respect to the total of 100 mol of the oxymethylene unit and the oxyethylene unit.
- the final sample obtained in Example 2 is an oximethylene copolymer using tris (pentafluorophenyl) borane trihydrate as arylboron fluoride. Therefore, when this is subjected to the analysis, tris (penta) is used. Fluoroadducts of fluorophenyl) boron were detected.
- the solution for preparing the calibration curve used for quantification was a standard 20 mg of tris (pentafluorophenyl) borane trihydrate dissolved in 2 mL of hexafluoroisopropanol and serially diluted with methanol.
- HT Layered Double Hydroxide Hydrotalcite
- HT Layered Double Hydroxide Hydrotalcite
- the sample was prepared according to the following procedure.
- the final sample 50 g obtained in Example 2 was calcined at 280 ° C. for 7 hours and then calcined at 600 ° C. for 1 hour in an electric furnace to obtain 0.003 g of ash.
- the obtained ash content was measured by an X-ray diffractometer (MiniFlex 600 manufactured by RIGAKU). The results are shown in FIG.
- the hydrotalcite contained in the oxymethylene copolymer can be identified by XRD analysis, that is, a fired product of magnesium hydroxide, a fired product of aluminum monostearate, magnesium hydroxide and mono. It was confirmed by measuring the calcined product of the mixture of aluminum stearate and the calcined product of hydrotalcite. As a result of quantification, it was found that 0.005 g of hydrotalcite was contained in 1 g of the oxymethylene copolymer.
- B3 is the total amount of boron in the sample
- B2 is the amount of boron derived from the boron trifluoride compound in the sample
- B1 is the amount of boron derived from the arylboron fluoride compound in the sample
- B1 is the above-mentioned amount. It was obtained by converting the concentration of the arylboron fluoride compound obtained by LC-MS analysis into the amount of boron.
- the amount of boron (B2) derived from the boron trifluoride compound contained in 1 g of the oxymethylene copolymer was 3.5 ppm.
- the amount of boron (B1) derived from the arylboron fluoride compound was calculated as 0.01 ppm from the above-mentioned HPLC results. Therefore, the value of B1 / B2 (molar ratio) was 0.003.
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Abstract
Description
[(M2+)x(M3+)y(OH)2(x+y)](An-)x/n・z(H2O) (1)
{式(1)中、M2+は2価の金属イオンを示す。M3+は3価の金属イオンを示す。An-はn価のアニオンを示し、複数のアニオンを含んでいてもよい。また、xは0<x≦6.0の範囲であり、nは1~3の整数であり、y、zは0以上の数である。}
[2]前記(iii)層状複水酸化物の含有量が、前記(i)オキシメチレン共重合体100質量部あたり0.003~1質量部である、上記[1]に記載のオキシメチレン共重合体樹脂組成物。
[3]前記(ii)フッ化アリールホウ素化合物の誘導体が、フッ化アリールホウ素化合物のフッ素付加物である、上記[1]または[2]に記載のオキシメチレン共重合体樹脂組成物。
[4]さらに、前記(i)オキシメチレン共重合体100質量部あたり、(iv)ヒンダードフェノール系酸化防止剤を0.01~1質量部含有する、上記[1]~[3]のいずれかに記載のオキシメチレン共重合体樹脂組成物。
[5]前記フッ化アリールホウ素化合物が、トリス(ペンタフルオロフェニル)ボラン、ビス(ペンタフルオロフェニル)フルオロボランおよびペンタフルオロフェニルジフルオロボラン、並びにそれらの水和物からなる群より選択される少なくとも1種である、上記[1]~[4]のいずれかに記載のオキシメチレン共重合体樹脂組成物。
[6]前記フッ化アリールホウ素化合物のフッ素付加物が、(ii’)フッ化アリールホウ素化合物と、(ii’’)BF3・(α)m(式中、mは0または1を示し、αは、炭素数2~20のアルキルエーテル、テトラヒドロフラン、またはフェノールを示す。)で表される三フッ化ホウ素化合物とに由来するものであり、
(ii’’)三フッ化ホウ素化合物に由来するホウ素の量(B2)に対する(ii’)フッ化アリールホウ素化合物に由来するホウ素の量(B1)のモル比B1/B2が0.0001~0.1である、上記[3]~[5]のいずれかに記載のオキシメチレン共重合体樹脂組成物。
[7]前記(iii)層状複水酸化物がハイドロタルサイトである、上記[1]~[6]のいずれかに記載のオキシメチレン共重合体樹脂組成物。
[8]前記一般式(1)におけるM2+がMg2+であり、M3+がAl3+であり、An-がCO3 2-および/またはOH-である、上記[1]~[7]のいずれかに記載のオキシメチレン共重合体樹脂組成物。
[9]さらに、前記(i)オキシメチレン共重合体100質量部あたり(v)窒素含有化合物を0.01~0.3質量部含有する、上記[1]~[8]のいずれかに記載のオキシメチレン共重合体樹脂組成物。
[10]前記(v)窒素含有化合物が、アミノ置換トリアジン化合物、ポリアミド樹脂、およびヒンダードアミン化合物からなる群より選ばれる少なくとも一種類である、上記[9]に記載のオキシメチレン共重合体樹脂組成物。
[11](i’)主モノマーであるトリオキサン、(i’’)コモノマーである少なくとも一つの炭素-炭素結合を有する環状エーテルおよび/または環状ホルマール、ならびに、反応開始剤として(ii’)フッ化アリールホウ素化合物および(ii’’)BF3・(α)m(式中、mは0または1を示し、αは、炭素数2~20のアルキルエーテル、テトラヒドロフラン、またはフェノールを示す。)で表される三フッ化ホウ素化合物を使用して共重合反応を行い、(i)オキシメチレン共重合体を含む反応生成物を得る工程と、
得られた反応生成物に、(iii)下記一般式(1)で表される層状複水酸化物を添加する工程とを含み、
該(iii)層状複水酸化物の添加量が、前記(i)オキシメチレン共重合体100質量部あたり0.003~1質量部であることを特徴とする、オキシメチレン共重合体樹脂組成物の製造方法。
[(M2+)x(M3+)y(OH)2(x+y)](An-)x/n・z(H2O) (1)
{式(1)中、M2+は2価の金属イオンを示す。M3+は3価の金属イオンを示す。An-はn価のアニオンを示し、複数のアニオンを含んでいてもよい。xは0<x≦6.0の範囲である。nは1~3の整数である。y、zは0以上の数である。}
[12]さらに、(i)オキシメチレン共重合体100質量部あたり、(iv)ヒンダードフェノール系酸化防止剤を0.01~1質量部添加することを含む、上記[11]に記載のオキシメチレン共重合体樹脂組成物の製造方法。
[13]前記αが、ジメチルエーテル、ジエチルエーテルおよびジブチルエーテルからなる群より選択される少なくとも1種である、上記[11]または[12]に記載のオキシメチレン共重合体樹脂組成物の製造方法。
[14]前記(ii’)フッ化アリールホウ素化合物が、トリス(ペンタフルオロフェニル)ボラン、ビス(ペンタフルオロフェニル)フルオロボランおよびペンタフルオロフェニルジフルオロボラン、並びにそれらの水和物からなる群より選択される少なくとも1種である、上記[11]~[13]のいずれかに記載のオキシメチレン共重合体樹脂組成物の製造方法。
[15]前記(ii’)フッ化アリールホウ素化合物を、前記(ii’’)三フッ化ホウ素化合物に対して0.0001以上、1未満のモル比率の範囲で使用する、上記[11]~[14]のいずれかに記載のオキシメチレン共重合体樹脂組成物の製造方法。
[16]前記(ii’)フッ化アリールホウ素化合物と前記(ii’’)三フッ化ホウ素化合物とを予め混合して反応開始剤混合物を調製し、該反応開始剤混合物を使用する、上記[11]~[15]のいずれかに記載のオキシメチレン共重合体樹脂組成物の製造方法。
[17]前記(iii)層状複水酸化物がハイドロタルサイトである、上記[11]~[16]のいずれかに記載のオキシメチレン共重合体樹脂組成物の製造方法。
[18]前記一般式(1)におけるM2+がMg2+であり、M3+がAl3+であり、An-がCO3 2-および/またはOH-である、上記[11]~[17]のいずれかに記載のオキシメチレン共重合体樹脂組成物の製造方法。
[19]前記(i)オキシメチレン共重合体100質量部あたり、(v)窒素含有化合物を0.01~0.3質量部添加する、上記[11]~[18]のいずれかに記載のオキシメチレン共重合体樹脂組成物の製造方法。
[20]前記(v)窒素含有化合物が、アミノ置換トリアジン化合物、ポリアミド樹脂、およびヒンダードアミン化合物からなる群より選ばれる少なくとも一種類である、上記[19]に記載のオキシメチレン共重合体樹脂組成物の製造方法。
[21]上記[11]~[20]のいずれかに記載の製造方法によって得られた、オキシメチレン共重合体樹脂組成物。
本発明の製造方法においては、(i’)主モノマーとして、ホルムアルデヒドの環状三量体であるトリオキサンを使用する。
(i’’)コモノマーとしては、少なくとも一つの炭素-炭素結合を有する環状エーテルまたは環状ホルマールを使用する。
本発明の製造方法では、反応開始剤として、(ii’)フッ化アリールホウ素化合物と(ii’’)三フッ化ホウ素化合物の2種類を使用する。(ii’’)三フッ化ホウ素化合物のみを使用すると、オキシメチレン共重合体の高分子量化と高収率化とを両立させることが困難である。しかしながら、(ii’’)三フッ化ホウ素化合物に高活性な反応開始剤である(ii’)フッ化アリールホウ素化合物を組み合わせることで、高分子量化と高収率化の両立が実現でき、しかも成形臭気(成形体から生じる臭気)の増加も抑制することができる。収率が高いと、生産効率向上による省原料や省エネルギーを実現することができ、製造コストの低減が可能となる。
加えて、連鎖移動剤の量を増加することにより、重合工程において生産安定性を確保しながら生産量をさらに増大することも可能にする。詳述すると、一般的に、同一製造装置において重合工程の生産量を増加させようとすると、重合時の反応熱が増加する速度に対して、除熱が追い付かなくなる。その結果、副反応が進行しやすい、重合度が増大しにくいなどの不都合が生じ、製品のMFRが増加するため、連鎖移動剤の使用量を減少させることとなる。このとき、連鎖移動剤の使用量がゼロ付近になってしまうと、それ以上の生産量増量が見込めないことに加え、製品の重合度の調整ができなくなってしまい、結局重合工程における生産量の増大という要望を満たせなくなってしまう。しかしながら、本発明の製造方法においては、特定の2種類の反応開始剤を使用することで連鎖移動剤の増量を可能にし、副反応の進行や重合度が増大しにくいといった生産安定性の問題を回避しながら、更なる生産量増加を達成することができる。
さらにまた、(ii’)フッ化アリールホウ素化合物と(ii’’)三フッ化ホウ素化合物を、後述する(iii)層状複水酸化物と共に使用することで、特に高温多湿環境下でオキシメチレン共重合体樹脂組成物を保管し、その後成形に供した場合、得られる成形体からの臭気発生量を有効に抑制することができる。
本発明の製造方法では、さらに、(iii)層状複水酸化物を使用する。(iii)層状複水酸化物は、下記式(1)で表される。 [(M2+)x(M3+)y(OH)2(x+y)](An-)x/n・z(H2O) (1)
式(1)中、M2+は2価の金属イオンを示す。M3+は3価の金属イオンを示す。An-はn価のアニオンを示し、複数のアニオンを含んでいてもよい。xは0<x≦6.0の範囲である。nは1~3の整数である。y、zは0以上の数である。
他の材料として、(iv)ヒンダードフェノール系酸化防止剤を使用することが好ましい。ヒンダードフェノール系酸化防止剤は、オキシメチレン共重合体に対して酸化防止作用を有するヒンダードフェノール化合物であれば特に限定されないが、例えば、2,2'-メチレン-ビス(4-メチル-6-t-ブチルフェノール)、4,4'-メチレン-ビス(2,6-ジ-t-ブチルフェノール)、1,3,5-トリメチル-2,4,6-トリス(3,5-ジ-t-ブチル-4-ヒドロキシベンジル)ベンゼン、3,5-ジ-t-ブチル-4-ヒドロキシベンジルジメチルアミン、ジステアリル-3,5-ジ-t-ブチル-4-ヒドロキシベンジルホスホネート、ジエチル-3,5-ジ-t-ブチル-4-ヒドロキシベンジルホスホネート、2,6,7-トリオキサ-1-ホスファ-ビシクロ[2.2.2]オクト-4-イル-メチル-3,5-ジ-t-ブチル-4-ヒドロキシヒドロシンナメート、3,5-ジ-t-ブチル-4-ヒドロキシフェニル-3,5-ジステアリル-チオトリアジルアミン、2-(2-ヒドロキシ-3,5-ジ-t-ブチルフェニル)-5-クロロベンゾトリアゾール、2,6-ジ-t-ブチル-4-ヒドロキシメチルフェノール、2,4-ビス-(n-オクチルチオ)-6-(4-ヒドロキシ-3,5-ジ-t-ブチルアニリノ)-1,3,5-トリアジン、N,N'-ヘキサメチレンビス(3,5-ジ-t-ブチル-4-ヒドロキシ-ヒドロシンナムアミド)、オクタデシル-3-(3,5-ジ-t-ブチル-4-ヒドロキシフェニル)プロピオネート、1,6-ヘキサンジオール-ビス[3-(3,5-ジ-t-ブチル-4-ヒドロキシフェニル)プロピオネート]、ペンタエリスリトール-テトラキス[3-(3,5-ジ-t-ブチル-4-ヒドロキシフェニル)プロピオネート]、トリエチレングリコール-ビス[3-(3,5-ジメチル-4-ヒドロキシフェニル)プロピオネート]、トリエチレングリコール-ビス[3-(3-t-ブチル-4-ヒドロキシ-5-メチルフェニル)プロピオネート]、トリエチレングリコール-ビス[3-(3,5-ジ-t-ブチル-4-ヒドロキシフェニル)プロピオネート]、2,2'-チオジエチル-ビス[3-(3,5-ジ-t-ブチル-4-ヒドロキシフェニル)プロピオネート]が挙げられる。これらのヒンダードフェノール化合物は、1種類を単独で使用してよく、2種類以上を併用してもよい。これらの中で、1,3,5-トリメチル-2,4,6-トリス(3,5-ジ-t-ブチル-4-ヒドロキシベンジル)ベンゼン、ペンタエリスリトール-テトラキス[3-(3,5-ジ-t-ブチル-4-ヒドロキシフェニル)プロピオネート]、トリエチレングリコール-ビス[3-(3-t-ブチル-4-ヒドロキシ-5-メチルフェニル)プロピオネート]が好ましく、トリエチレングリコール-ビス[3-(3-t-ブチル-4-ヒドロキシ-5-メチルフェニル)プロピオネート]が特に好ましい。
また、本発明の製造方法においては、他の材料として、(v)窒素含有化合物を使用することが好ましい。(v)窒素含有化合物を使用することで、成形体からの臭気、特に高温多湿環境下で保管した樹脂組成物を用いて得られた成形体からの臭気の発生をより有効に抑制することができる。
本発明の製造方法においては、重合度を調節する観点から、他の材料として、連鎖移動剤(分子量調節剤とも呼ぶ。)を使用してもよい。連鎖移動剤の種類は、特に限定されないが、例えば、カルボン酸、カルボン酸無水物、エステル、アミド、イミド、フェノ-ル類、アセタール化合物などが挙げられ、特にフェノール、2,6-ジメチルフェノール、メチラール、ポリアセタールジメトキシド、メトキシメチラール、ジメトキシメチラール、トリメトキシメチラール、オキシメチレンジ-n-ブチルエーテルが好適に用いられる。その中でも最も好ましいのはメチラールである。連鎖移動剤は、必要に応じて重合反応に不活性な溶媒に希釈して使用することができる。
なお、連鎖移動剤の量が使用可能量を超えると、得られるオキシメチレン共重合体のMFRが所望の値よりも大きな値になるという現象が起こるので、この現象の有無を確認することにより、連鎖移動剤の使用可能量の上限を決定することができる。例えば、MFRが所望の値の120%より大きな値になった時点の連鎖移動剤の使用量を使用可能量の上限と判断することができる。同様に、連鎖移動剤の量が使用可能量を下回ると、得られるオキシメチレン共重合体のMFRが所望の値よりも小さな値になるという現象が起こるので、この現象の有無を確認することにより、連鎖移動剤の使用可能量の下限を決定することができる。例えばMFRが所望の値の80%より小さな値になった時点の連鎖移動剤の使用量を使用可能量の下限と判断することができる。
本発明の製造方法においては、(i’)トリオキサン、(i’’)コモノマー、および反応開始剤{(ii’)フッ化アリールホウ素化合物と(ii’’)三フッ化ホウ素化合物}を用いて重合反応をおこなう。重合反応の形式は、特に限定されるものではなく、従来公知のオキシメチレン共重合体の製造方法と同様の形式で行うことができる。好適には、塊状重合、懸濁重合、溶液重合、または溶融重合のいずれであってもよく、塊状重合が特に好ましい。
POM含有率(重量%)=B(g)/A(g)×100
重合反応が十分に進んだ後、必要に応じて、公知の停止剤を反応系に混合して反応開始剤および重合成長末端を失活させ、重合反応を停止させてもよい。公知の停止剤としてトリフェニルホスフィンなどの三価の有機リン化合物;アルカリ金属の水酸化物;アルカリ土類金属の水酸化物;ジエチルアミン、トリエチルアミン、トリブチルアミン、トリエタノールアミン、N-メチルジエタノールアミン、N,N-ジエチルヒドロキシルアミン、N-イソプロピルヒドロキシルアミン、N,N-ビスオクタデシルヒドロキシルアミン、N,N-ジベンジルヒドロキシルアミン等のアミン化合物が知られている。なかでも、N,N-ジエチルヒドロキシルアミンは製品からのホルムアルデヒド発生量が低減し、成形時のモールドデポジットの発生が少ないといった特性に優れ、入手も容易であるので特に好ましい。
重合反応が十分進み、必要に応じて行われる重合停止工程が完了し、反応生成物を得た後で、重合機から排出された反応生成物と公知の安定剤を、必要に応じてブレンドし、単軸または二軸押出機、二軸のパドル型連続混合機等により加熱溶融混練する。これにより、熱的に不安定な部分を熱分解し、減圧下で脱気を行うことができる。このような操作を安定化と呼ぶ。
本発明の別の態様は、(i)オキシメチレン共重合体、(ii)フッ化アリールホウ素化合物の誘導体および(iii)層状複水酸化物を含む、オキシメチレン共重合体樹脂組成物(以下、本発明のオキシメチレン共重合体樹脂組成物と呼ぶことがある。)に関する。
(i)オキシメチレン共重合体は、オキシメチレン単位(-OCH2-)と炭素数が2以上のオキシアルキレン単位とを構成単位として含有する高分子化合物である。炭素数が2以上のオキシアルキレン基は特に限定されず、例えば、オキシエチレン(-OCH2CH2-)基、オキシプロピレン(-OCH2CH2CH2-)基、オキシブチレン(-OCH2CH2CH2CH2-)基等が挙げられる。なかでも、オキシエチレン基(-OCH2CH2-)が好ましい。
本発明のオキシメチレン共重合体樹脂組成物においては、(ii’)フッ化アリールホウ素化合物が、他の成分と誘導体を形成した状態で含まれている。
本発明のオキシメチレン共重合体樹脂組成物は、(i)オキシメチレン共重合体、(ii)フッ化アリールホウ素化合物の誘導体および(iii)層状複水酸化物以外に、他の成分を含んでいてもよい。他の成分としては、本発明の製造方法の説明に記載した他の材料またはそれに由来する成分が挙げられる。
本発明のオキシメチレン共重合体樹脂組成物は、公知のオキシメチレン共重合体樹脂組成物の成形加工法に従って、種々の形態に成形加工することができる。本発明のオキシメチレン共重合体樹脂組成物から得られた成形体からは、臭気の発生が抑制されている。本発明のオキシメチレン共重合体樹脂組成物から得られた成形体としては、ペレット、丸棒、厚板、シート、チューブ、円筒状や方形状の容器といった形状が挙げられるがこれに限定されるものではない。
重合反応
トリオキサンと1,3-ジオキソランとを合流させて、混合流体を得た。このとき、トリオキサンは200kg/hrの速さで、コモノマーである1,3-ジオキソランは8.0kg/hrの速さで合流させた。次に、混合流体に連鎖移動剤であるメチラール(メチラール濃度33質量%のベンゼン溶液)をMFRが8g/10minになるように量を調整して合流させた。最後に反応開始剤として、表1の記載の量の三フッ化ホウ素ジエチルエーテラート(BF3)とトリス(ペンタフルオロフェニル)ボラン三水和物(TPB)を予め混合して得た反応開始剤混合物を連続的に合流させ、混合物を得た。直後に、温度を85℃に設定した、セルフクリーニング型パドルを有する二軸の連続重合機に混合物を供給した。
滞在時間が15分となったとき、連続重合機内に、重合停止剤であるN,N-ジエチルヒドロキシルアミン(N,N-ジエチルヒドロキシルアミン濃度20重量%のベンゼン溶液)を添加した。添加量は、反応開始剤(BF3とTPB)1molに対し4molであった。添加後に粉砕をおこなった。
粉砕物(反応生成物)と、ヒンダードフェノール系酸化防止剤としてトリエチレングリコール-ビス[3-(3-t-ブチル-4-ヒドロキシ-5-メチルフェニル)プロピオネート](製品名:IRGANOX(登録商標)245、BASF社製)と、層状複水酸化物としてハイドロタルサイト(製品名:Hycite(登録商標)713、クラリアントケミカルズ社製)と、窒素含有化合物としてメラミン(三井化学製)とを添加し、ヘンシェルミキサーを用いて予備混合をおこなった。オキシメチレン共重合体100質量部に対する、ヒンダードフェノール系酸化防止剤、ハイドロタルサイト、メラミンの添加量は表1に示すとおりとした。
連続的に押し出した溶融樹脂をストランドとして冷却用の水槽に浸漬した後にペレタイザーに供給してペレット化した。得られたペレットは、140℃、3時間熱風乾燥機で乾燥した。
ハイドロタルサイトとメラミンの量を表1に示す量とした点以外は、実施例1と同様にしてオキシメチレン共重合体樹脂組成物を得た。
ハイドロタルサイトを使用しなかった点以外は、実施例1と同様にしてオキシメチレン共重合体樹脂組成物を得た。
ハイドロタルサイトの使用量を表2に示す量とした点以外は、実施例1と同様にしてオキシメチレン共重合体樹脂組成物を得た。
TPBを使用しなかった点以外は、比較例1と同様にしてオキシメチレン共重合体を得た。
TPBを使用しなかった点以外は、実施例2と同様にしてオキシメチレン共重合体を得た。
TPBを使用しなかった点以外は、実施例3と同様にしてオキシメチレン共重合体を得た。
実施例および比較例で得られた反応生成物について、下記式:
収率(%)=(重合反応の停止後に排出される反応生成物の1時間あたりの収量(kg/hr))×(反応生成物のPOM含有率(重量%))/(1時間あたりに供給した全モノマー量(kg/hr)
により収率を算出した。
上記式における反応生成物のPOM含有率は次の手順により求めた。各実施例および比較例の重合反応停止後に、反応生成物の一部を回収し、その重量(以下、Ag)を測定した。次いで、未反応モノマー除去のために反応生成物をアセトンで2回洗浄した後に、アセトンおよび残存する未反応モノマーを真空乾燥機により60℃で2時間真空乾燥した。真空乾燥後の重量(Bg)を測定した。下記式:
POM含有率(重量%)=B(g)/A(g)×100
によりPOM含有率を算出した。
結果を表1、2に示す。
ASTM-D1238(190℃、2.16kg加重下)に従って、各実施例または比較例で得られた最終サンプルのMFRを測定した。結果を表1,2に示す。
MFRの値が小さいことは、分子量が大きいことを意味する。
最終サンプルのペレットを用いて得られた成形体からのホルムアルデヒド(HCHO)の発生量(単位:mg/kg)を、以下の手順で測定した。1)最終サンプルのペレットを80℃、3時間予備乾燥した。その後、山城社製SAV-30-30成形機を用いて、シリンダー温度230℃にて、直径50mm×厚さ3mmの円板の試験片に成形した。2)得られた試験片を、23℃、50±5%RHの恒温恒湿室において一晩静置した。3)翌日、ドイツ自動車工業組合規格VDA275(自動車室内部品-改訂フラスコ法によるホルムアルデヒド放出量の定量)に記載された方法に準拠して、試験片のホルムアルデヒド発生量を測定した。
加湿条件下で保管した後の最終サンプルのペレットを用いて得られた成形体からのホルムアルデヒド(HCHO)の発生量(単位:mg/kg)を、以下の手順で測定した。1)最終サンプルのペレットを80℃98%RHの環境下で24時間保管した後、80℃、4時間予備乾燥した。その後、山城社製SAV-30-30成形機を用いて、シリンダー温度230℃にて、直径50mm×厚さ3mmの円板の試験片に成形した。2)得られた試験片を、23℃、50±5%RHの恒温恒湿室において一晩静置した。3)翌日、ドイツ自動車工業組合規格VDA275(自動車室内部品-改訂フラスコ法によるホルムアルデヒド放出量の定量)に記載された方法に準拠して、試験片のホルムアルデヒド発生量を測定した。
実施例2で得られた最終サンプル中の成分の分析を行った。具体的な手順と結果は以下のとおりであった。
プロトン核磁気共鳴(1H-NMR)にて分析することにより、実施例2で得られた最終サンプル(オキシメチレン共重合体樹脂組成物のペレット)に含まれるオキシアルキレン単位の定量を行った。具体的な方法は次の通りである。
実施例2におけるオキシメチレン共重合体の調製には、1,3,5-トリオキサンを主モノマーとして、1,3-ジオキソランをコモノマーとして用いた。そのため、炭素数が2以上のオキシアルキレン単位としてはオキシエチレン単位が定量対象であった。
実施例2で得られた最終サンプルを液体窒素によりガラス移転点以下とし、ミルにより粉砕し、粉砕物を得た。該粉砕物を篩分けし、粉体を採取した。該粉体を量り採り、1,1,1,3,3,3-ヘキサフルオロイソプロパノール-D2(純度99%)に溶解した。得られた溶液を1H-NMR分析に供した。
NMR装置はBRUKER製AVANCEIII500を使用し、同定、定量を行った。
結果を図1に示した。定量の結果、オキシメチレン単位とオキシエチレン単位の合計100モルに対して、オキシメチレン単位は98.7モル、オキシエチレン単位は1.3モルであった。
液体クロマトグラフィー-エレクトロスプレーイオン化質量分析(LC-MS(ESI-))により、実施例2で得られた最終サンプル中のフッ化アリールホウ素化合物の誘導体を定量した。
実施例2で得られた最終サンプルに、ヘキサフルオロイソプロパノールを加えて完全に溶解させて溶液Aを得た。バイアル瓶にメタノールを量り採り、そこに前記溶液Aを滴下し、樹脂を沈殿させた。可溶分の全量を回収し、メタノールを加えLC-MS(ESI-)分析に供した。測定結果を図2に示す。
実施例2で得られた最終サンプルは、フッ化アリールホウ素としてトリス(ペンタフルオロフェニル)ボラン三水和物を使用したオキシメチレン共重合体であるため、これを該分析に供すると、トリス(ペンタフルオロフェニル)ボランのフッ素付加物が検出された。
定量に用いた検量線作成用の溶液は、トリス(ペンタフルオロフェニル)ボラン三水和物の標準20mgを、2mLのヘキサフルオロイソプロパノールに溶解し、メタノールにより段階希釈したものであった。この溶液をLC-MS(ESI-)分析に供すると、図3に示すように、トリス(ペンタフルオロフェニル)ボランがヘキサフルオロイソプロパノール付加物またはメタノール付加物または水付加物として検出された。各誘導体の面積値の合計をトリス(ペンタフルオロフェニル)ボランと等価として計算した。
定量の結果、オキシメチレン共重合体1gに対してトリス(ペンタフルオロフェニル)ボラン誘導体は0.5μg含まれていることが分かった。該オキシメチレン共重合体を調製するときに使用したトリス(ペンタフルオロフェニル)ボラン三水和物の量に対して、回収率は25%であった。
層状複水酸化物としてハイドロタルサイト(以下「HT」と呼ぶことがある。)は、実施例2で得られた最終サンプルを焼成した後の灰分をXRDにより分析して定量した。
試料の調製は以下の手順で行った。実施例2で得られた最終サンプル50gを280℃で7時間焼成後、電気炉において600℃で1時間焼成して灰分を0.003g得た。得られた灰分をX線回折装置(RIGAKU製MiniFlex600)により測定した。結果を図4に示す。測定結果から層状複水酸化物と同定し、焼成による重量減少を考慮して層状複水酸化物として定量した。
なお、オキシメチレン共重合体に含まれるハイドロタルサイトがXRD分析で同定可能であることは、図5に示すとおり、水酸化マグネシウムの焼成品、モノステアリン酸アルミニウムの焼成品、水酸化マグネシウムとモノステアリン酸アルミニウムの混合物の焼成品、ハイドロタルサイトの焼成品の測定により、確認した。
定量の結果、オキシメチレン共重合体1gに対してハイドロタルサイトが0.005g含まれていることが分かった。
実施例2で得られたサンプル(オキシメチレン共重合体樹脂組成物のペレット)を塩酸により溶解した。得られた溶液をICP発光分光分析装置(ICP-OES Optima8300DV、PerkinElmer社製)により分析し、ホウ素量(B3)を定量した。下記式(2)により三フッ化ホウ素化合物に由来したホウ素量(B2)を算出した。
(B2)=(B3)-(B1) (2)
(ただし、B3はサンプル中の全ホウ素量、B2はサンプル中の三フッ化ホウ素化合物に由来したホウ素量、B1はサンプル中のフッ化アリールホウ素化合物に由来したホウ素量であり、B1は前述のLC-MS分析により求められたフッ化アリールホウ素化合物濃度からホウ素量に換算して得た。)
定量の結果、オキシメチレン共重合体1gに含まれている三フッ化ホウ素化合物由来のホウ素量(B2)は3.5ppmであった。なお、フッ化アリールホウ素化合物に由来したホウ素量(B1)は先述のHPLCの結果より0.01ppmとして計算した。よって、B1/B2(モル比)の値は、0.003であった。
Claims (21)
- (i)オキシメチレン単位と炭素数が2以上のオキシアルキレン単位とを含むオキシメチレン共重合体、(ii)フッ化アリールホウ素化合物の誘導体および(iii)下記一般式(1)で表される層状複水酸化物を含むことを特徴とする、オキシメチレン共重合体樹脂組成物。
[(M2+)x(M3+)y(OH)2(x+y)](An-)x/n・z(H2O) (1)
{式(1)中、M2+は2価の金属イオンを示す。M3+は3価の金属イオンを示す。An-はn価のアニオンを示し、複数のアニオンを含んでいてもよい。また、xは0<x≦6.0の範囲であり、nは1~3の整数であり、y、zは0以上の数である。} - 前記(iii)層状複水酸化物の含有量が、前記(i)オキシメチレン共重合体100質量部あたり0.003~1質量部である、請求項1に記載のオキシメチレン共重合体樹脂組成物。
- 前記(ii)フッ化アリールホウ素化合物の誘導体が、フッ化アリールホウ素化合物のフッ素付加物である、請求項1または2に記載のオキシメチレン共重合体樹脂組成物。
- さらに、前記(i)オキシメチレン共重合体100質量部あたり、(iv)ヒンダードフェノール系酸化防止剤を0.01~1質量部含有する、請求項1~3のいずれか一項に記載のオキシメチレン共重合体樹脂組成物。
- 前記フッ化アリールホウ素化合物が、トリス(ペンタフルオロフェニル)ボラン、ビス(ペンタフルオロフェニル)フルオロボランおよびペンタフルオロフェニルジフルオロボラン、並びにそれらの水和物からなる群より選択される少なくとも1種である、請求項1~4のいずれか一項に記載のオキシメチレン共重合体樹脂組成物。
- 前記フッ化アリールホウ素化合物のフッ素付加物が、(ii’)フッ化アリールホウ素化合物と、(ii’’)BF3・(α)m(式中、mは0または1を示し、αは、炭素数2~20のアルキルエーテル、テトラヒドロフラン、またはフェノールを示す。)で表される三フッ化ホウ素化合物とに由来するものであり、
(ii’’)三フッ化ホウ素化合物に由来するホウ素の量(B2)に対する(ii’)フッ化アリールホウ素化合物に由来するホウ素の量(B1)のモル比B1/B2が0.0001~0.1である、請求項3~5のいずれか一項に記載のオキシメチレン共重合体樹脂組成物。 - 前記(iii)層状複水酸化物がハイドロタルサイトである、請求項1~6のいずれか一項に記載のオキシメチレン共重合体樹脂組成物。
- 前記一般式(1)におけるM2+がMg2+であり、M3+がAl3+であり、An-がCO3 2-および/またはOH-である、請求項1~7のいずれか一項に記載のオキシメチレン共重合体樹脂組成物。
- さらに、前記(i)オキシメチレン共重合体100質量部あたり(v)窒素含有化合物を0.01~0.3質量部含有する、請求項1~8のいずれか一項に記載のオキシメチレン共重合体樹脂組成物。
- 前記(v)窒素含有化合物が、アミノ置換トリアジン化合物、ポリアミド樹脂、およびヒンダードアミン化合物からなる群より選ばれる少なくとも一種類である、請求項9に記載のオキシメチレン共重合体樹脂組成物。
- (i’)主モノマーであるトリオキサン、(i’’)コモノマーである少なくとも一つの炭素-炭素結合を有する環状エーテルおよび/または環状ホルマール、ならびに、反応開始剤として(ii’)フッ化アリールホウ素化合物および(ii’’)BF3・(α)m(式中、mは0または1を示し、αは、炭素数2~20のアルキルエーテル、テトラヒドロフラン、またはフェノールを示す。)で表される三フッ化ホウ素化合物を使用して共重合反応を行い、(i)オキシメチレン共重合体を含む反応生成物を得る工程と、
得られた反応生成物に、(iii)下記一般式(1)で表される層状複水酸化物を添加する工程とを含み、
該(iii)層状複水酸化物の添加量が、前記(i)オキシメチレン共重合体100質量部あたり0.003~1質量部であることを特徴とする、オキシメチレン共重合体樹脂組成物の製造方法。
[(M2+)x(M3+)y(OH)2(x+y)](An-)x/n・z(H2O) (1)
{式(1)中、M2+は2価の金属イオンを示す。M3+は3価の金属イオンを示す。An-はn価のアニオンを示し、複数のアニオンを含んでいてもよい。xは0<x≦6.0の範囲である。nは1~3の整数である。y、zは0以上の数である。} - さらに、(i)オキシメチレン共重合体100質量部あたり、(iv)ヒンダードフェノール系酸化防止剤を0.01~1質量部添加することを含む、請求項11に記載のオキシメチレン共重合体樹脂組成物の製造方法。
- 前記αが、ジメチルエーテル、ジエチルエーテルおよびジブチルエーテルからなる群より選択される少なくとも1種である、請求項11または12に記載のオキシメチレン共重合体樹脂組成物の製造方法。
- 前記(ii’)フッ化アリールホウ素化合物が、トリス(ペンタフルオロフェニル)ボラン、ビス(ペンタフルオロフェニル)フルオロボランおよびペンタフルオロフェニルジフルオロボラン、並びにそれらの水和物からなる群より選択される少なくとも1種である、請求項11~13のいずれか一項に記載のオキシメチレン共重合体樹脂組成物の製造方法。
- 前記(ii’)フッ化アリールホウ素化合物を、前記(ii’’)三フッ化ホウ素化合物に対して0.0001以上、1未満のモル比率の範囲で使用する、請求項11~14のいずれか一項に記載のオキシメチレン共重合体樹脂組成物の製造方法。
- 前記(ii’)フッ化アリールホウ素化合物と前記(ii’’)三フッ化ホウ素化合物とを予め混合して反応開始剤混合物を調製し、該反応開始剤混合物を使用する、請求項11~15のいずれか一項に記載のオキシメチレン共重合体樹脂組成物の製造方法。
- 前記(iii)層状複水酸化物がハイドロタルサイトである、請求項11~16のいずれか一項に記載のオキシメチレン共重合体樹脂組成物の製造方法。
- 前記一般式(1)におけるM2+がMg2+であり、M3+がAl3+であり、An-がCO3 2-および/またはOH-である、請求項11~17のいずれか一項に記載のオキシメチレン共重合体樹脂組成物の製造方法。
- 前記(i)オキシメチレン共重合体100質量部あたり、(v)窒素含有化合物を0.01~0.3質量部添加する、請求項11~18のいずれか一項に記載のオキシメチレン共重合体樹脂組成物の製造方法。
- 前記(v)窒素含有化合物が、アミノ置換トリアジン化合物、ポリアミド樹脂、およびヒンダードアミン化合物からなる群より選ばれる少なくとも一種類である、請求項19に記載のオキシメチレン共重合体樹脂組成物の製造方法。
- 請求項11~20のいずれか一項に記載の製造方法によって得られた、オキシメチレン共重合体樹脂組成物。
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