WO2020116394A1 - エラストマー組成物及びシール材 - Google Patents
エラストマー組成物及びシール材 Download PDFInfo
- Publication number
- WO2020116394A1 WO2020116394A1 PCT/JP2019/047038 JP2019047038W WO2020116394A1 WO 2020116394 A1 WO2020116394 A1 WO 2020116394A1 JP 2019047038 W JP2019047038 W JP 2019047038W WO 2020116394 A1 WO2020116394 A1 WO 2020116394A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fluoroelastomer
- elastomer composition
- sealing material
- perfluoro
- vinyl ether
- Prior art date
Links
- 229920001971 elastomer Polymers 0.000 title claims abstract description 75
- 239000000806 elastomer Substances 0.000 title claims abstract description 74
- 239000003566 sealing material Substances 0.000 title claims abstract description 34
- 239000002131 composite material Substances 0.000 title description 2
- 229920001973 fluoroelastomer Polymers 0.000 claims abstract description 101
- 239000000203 mixture Substances 0.000 claims abstract description 69
- -1 alkoxy vinyl ether Chemical compound 0.000 claims abstract description 25
- 229920001577 copolymer Polymers 0.000 claims abstract description 15
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000003431 cross linking reagent Substances 0.000 claims description 24
- 150000002978 peroxides Chemical class 0.000 claims description 12
- 229920006169 Perfluoroelastomer Polymers 0.000 claims description 11
- 239000000047 product Substances 0.000 description 59
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 49
- 238000004132 cross linking Methods 0.000 description 40
- 238000012360 testing method Methods 0.000 description 31
- 239000000049 pigment Substances 0.000 description 17
- 230000008859 change Effects 0.000 description 14
- 238000000465 moulding Methods 0.000 description 11
- 230000000704 physical effect Effects 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 230000006835 compression Effects 0.000 description 9
- 238000007906 compression Methods 0.000 description 9
- 125000005843 halogen group Chemical group 0.000 description 9
- 239000000178 monomer Substances 0.000 description 9
- 239000012860 organic pigment Substances 0.000 description 8
- 239000000470 constituent Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 6
- 239000000945 filler Substances 0.000 description 6
- KOMNUTZXSVSERR-UHFFFAOYSA-N 1,3,5-tris(prop-2-enyl)-1,3,5-triazinane-2,4,6-trione Chemical compound C=CCN1C(=O)N(CC=C)C(=O)N(CC=C)C1=O KOMNUTZXSVSERR-UHFFFAOYSA-N 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- 239000000654 additive Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000002156 mixing Methods 0.000 description 5
- 229920000459 Nitrile rubber Polymers 0.000 description 4
- 230000000996 additive effect Effects 0.000 description 4
- 238000013329 compounding Methods 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 229920006172 Tetrafluoroethylene propylene Polymers 0.000 description 3
- 239000006229 carbon black Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000013065 commercial product Substances 0.000 description 3
- 238000009472 formulation Methods 0.000 description 3
- RAXXELZNTBOGNW-UHFFFAOYSA-N imidazole Natural products C1=CNC=N1 RAXXELZNTBOGNW-UHFFFAOYSA-N 0.000 description 3
- 238000004898 kneading Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000013585 weight reducing agent Substances 0.000 description 3
- RRZIJNVZMJUGTK-UHFFFAOYSA-N 1,1,2-trifluoro-2-(1,2,2-trifluoroethenoxy)ethene Chemical compound FC(F)=C(F)OC(F)=C(F)F RRZIJNVZMJUGTK-UHFFFAOYSA-N 0.000 description 2
- BLTXWCKMNMYXEA-UHFFFAOYSA-N 1,1,2-trifluoro-2-(trifluoromethoxy)ethene Chemical compound FC(F)=C(F)OC(F)(F)F BLTXWCKMNMYXEA-UHFFFAOYSA-N 0.000 description 2
- BQCIDUSAKPWEOX-UHFFFAOYSA-N 1,1-Difluoroethene Chemical compound FC(F)=C BQCIDUSAKPWEOX-UHFFFAOYSA-N 0.000 description 2
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 2
- 229920002943 EPDM rubber Polymers 0.000 description 2
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 239000003963 antioxidant agent Substances 0.000 description 2
- 230000003078 antioxidant effect Effects 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 229920005549 butyl rubber Polymers 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- FJKIXWOMBXYWOQ-UHFFFAOYSA-N ethenoxyethane Chemical compound CCOC=C FJKIXWOMBXYWOQ-UHFFFAOYSA-N 0.000 description 2
- 230000001747 exhibiting effect Effects 0.000 description 2
- 229910052731 fluorine Inorganic materials 0.000 description 2
- 239000011737 fluorine Substances 0.000 description 2
- 229920006168 hydrated nitrile rubber Polymers 0.000 description 2
- 230000005865 ionizing radiation Effects 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- WRXCBRHBHGNNQA-UHFFFAOYSA-N (2,4-dichlorobenzoyl) 2,4-dichlorobenzenecarboperoxoate Chemical compound ClC1=CC(Cl)=CC=C1C(=O)OOC(=O)C1=CC=C(Cl)C=C1Cl WRXCBRHBHGNNQA-UHFFFAOYSA-N 0.000 description 1
- KDGNCLDCOVTOCS-UHFFFAOYSA-N (2-methylpropan-2-yl)oxy propan-2-yl carbonate Chemical compound CC(C)OC(=O)OOC(C)(C)C KDGNCLDCOVTOCS-UHFFFAOYSA-N 0.000 description 1
- RIPYNJLMMFGZSX-UHFFFAOYSA-N (5-benzoylperoxy-2,5-dimethylhexan-2-yl) benzenecarboperoxoate Chemical compound C=1C=CC=CC=1C(=O)OOC(C)(C)CCC(C)(C)OOC(=O)C1=CC=CC=C1 RIPYNJLMMFGZSX-UHFFFAOYSA-N 0.000 description 1
- KHXKESCWFMPTFT-UHFFFAOYSA-N 1,1,1,2,2,3,3-heptafluoro-3-(1,2,2-trifluoroethenoxy)propane Chemical compound FC(F)=C(F)OC(F)(F)C(F)(F)C(F)(F)F KHXKESCWFMPTFT-UHFFFAOYSA-N 0.000 description 1
- JYEUMXHLPRZUAT-UHFFFAOYSA-N 1,2,3-triazine Chemical compound C1=CN=NN=C1 JYEUMXHLPRZUAT-UHFFFAOYSA-N 0.000 description 1
- BJELTSYBAHKXRW-UHFFFAOYSA-N 2,4,6-triallyloxy-1,3,5-triazine Chemical compound C=CCOC1=NC(OCC=C)=NC(OCC=C)=N1 BJELTSYBAHKXRW-UHFFFAOYSA-N 0.000 description 1
- DMWVYCCGCQPJEA-UHFFFAOYSA-N 2,5-bis(tert-butylperoxy)-2,5-dimethylhexane Chemical compound CC(C)(C)OOC(C)(C)CCC(C)(C)OOC(C)(C)C DMWVYCCGCQPJEA-UHFFFAOYSA-N 0.000 description 1
- 239000004342 Benzoyl peroxide Substances 0.000 description 1
- 229930185605 Bisphenol Natural products 0.000 description 1
- 239000004971 Cross linker Substances 0.000 description 1
- 239000004641 Diallyl-phthalate Substances 0.000 description 1
- 239000005909 Kieselgur Substances 0.000 description 1
- 239000006057 Non-nutritive feed additive Substances 0.000 description 1
- ZCQWOFVYLHDMMC-UHFFFAOYSA-N Oxazole Chemical compound C1=COC=N1 ZCQWOFVYLHDMMC-UHFFFAOYSA-N 0.000 description 1
- NRCMAYZCPIVABH-UHFFFAOYSA-N Quinacridone Chemical compound N1C2=CC=CC=C2C(=O)C2=C1C=C1C(=O)C3=CC=CC=C3NC1=C2 NRCMAYZCPIVABH-UHFFFAOYSA-N 0.000 description 1
- 239000006087 Silane Coupling Agent Substances 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- FZWLAAWBMGSTSO-UHFFFAOYSA-N Thiazole Chemical compound C1=CSC=N1 FZWLAAWBMGSTSO-UHFFFAOYSA-N 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
- QYKIQEUNHZKYBP-UHFFFAOYSA-N Vinyl ether Chemical group C=COC=C QYKIQEUNHZKYBP-UHFFFAOYSA-N 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- PYKYMHQGRFAEBM-UHFFFAOYSA-N anthraquinone Natural products CCC(=O)c1c(O)c2C(=O)C3C(C=CC=C3O)C(=O)c2cc1CC(=O)OC PYKYMHQGRFAEBM-UHFFFAOYSA-N 0.000 description 1
- 150000004056 anthraquinones Chemical class 0.000 description 1
- 235000019400 benzoyl peroxide Nutrition 0.000 description 1
- QUDWYFHPNIMBFC-UHFFFAOYSA-N bis(prop-2-enyl) benzene-1,2-dicarboxylate Chemical compound C=CCOC(=O)C1=CC=CC=C1C(=O)OCC=C QUDWYFHPNIMBFC-UHFFFAOYSA-N 0.000 description 1
- HZTNYDWTDTYXQC-UHFFFAOYSA-N bis(prop-2-ynyl) benzene-1,4-dicarboxylate Chemical compound C#CCOC(=O)C1=CC=C(C(=O)OCC#C)C=C1 HZTNYDWTDTYXQC-UHFFFAOYSA-N 0.000 description 1
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- LSXWFXONGKSEMY-UHFFFAOYSA-N di-tert-butyl peroxide Chemical compound CC(C)(C)OOC(C)(C)C LSXWFXONGKSEMY-UHFFFAOYSA-N 0.000 description 1
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 description 1
- PPSZHCXTGRHULJ-UHFFFAOYSA-N dioxazine Chemical compound O1ON=CC=C1 PPSZHCXTGRHULJ-UHFFFAOYSA-N 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000010828 elution Methods 0.000 description 1
- 125000002573 ethenylidene group Chemical group [*]=C=C([H])[H] 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 229920005560 fluorosilicone rubber Polymers 0.000 description 1
- 230000005251 gamma ray Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 229910001701 hydrotalcite Inorganic materials 0.000 description 1
- 229960001545 hydrotalcite Drugs 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- PXZQEOJJUGGUIB-UHFFFAOYSA-N isoindolin-1-one Chemical compound C1=CC=C2C(=O)NCC2=C1 PXZQEOJJUGGUIB-UHFFFAOYSA-N 0.000 description 1
- GWVMLCQWXVFZCN-UHFFFAOYSA-N isoindoline Chemical compound C1=CC=C2CNCC2=C1 GWVMLCQWXVFZCN-UHFFFAOYSA-N 0.000 description 1
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- 125000002560 nitrile group Chemical group 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 239000010702 perfluoropolyether Substances 0.000 description 1
- DGBWPZSGHAXYGK-UHFFFAOYSA-N perinone Chemical compound C12=NC3=CC=CC=C3N2C(=O)C2=CC=C3C4=C2C1=CC=C4C(=O)N1C2=CC=CC=C2N=C13 DGBWPZSGHAXYGK-UHFFFAOYSA-N 0.000 description 1
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000768 polyamine Polymers 0.000 description 1
- 125000003367 polycyclic group Chemical group 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- FYNROBRQIVCIQF-UHFFFAOYSA-N pyrrolo[3,2-b]pyrrole-5,6-dione Chemical compound C1=CN=C2C(=O)C(=O)N=C21 FYNROBRQIVCIQF-UHFFFAOYSA-N 0.000 description 1
- IZMJMCDDWKSTTK-UHFFFAOYSA-N quinoline yellow Chemical compound C1=CC=CC2=NC(C3C(C4=CC=CC=C4C3=O)=O)=CC=C21 IZMJMCDDWKSTTK-UHFFFAOYSA-N 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical compound O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- MHSKRLJMQQNJNC-UHFFFAOYSA-N terephthalamide Chemical compound NC(=O)C1=CC=C(C(N)=O)C=C1 MHSKRLJMQQNJNC-UHFFFAOYSA-N 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- JOUDBUYBGJYFFP-FOCLMDBBSA-N thioindigo Chemical compound S\1C2=CC=CC=C2C(=O)C/1=C1/C(=O)C2=CC=CC=C2S1 JOUDBUYBGJYFFP-FOCLMDBBSA-N 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
- GRPURDFRFHUDSP-UHFFFAOYSA-N tris(prop-2-enyl) benzene-1,2,4-tricarboxylate Chemical compound C=CCOC(=O)C1=CC=C(C(=O)OCC=C)C(C(=O)OCC=C)=C1 GRPURDFRFHUDSP-UHFFFAOYSA-N 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/102—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by material
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F216/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical
- C08F216/12—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal or ketal radical by an ether radical
- C08F216/14—Monomers containing only one unsaturated aliphatic radical
- C08F216/1408—Monomers containing halogen
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F214/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen
- C08F214/18—Monomers containing fluorine
- C08F214/26—Tetrafluoroethene
- C08F214/262—Tetrafluoroethene with fluorinated vinyl ethers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0025—Crosslinking or vulcanising agents; including accelerators
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/14—Peroxides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/12—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08L27/18—Homopolymers or copolymers or tetrafluoroethene
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K3/00—Materials not provided for elsewhere
- C09K3/10—Materials in mouldable or extrudable form for sealing or packing joints or covers
- C09K3/1006—Materials in mouldable or extrudable form for sealing or packing joints or covers characterised by the chemical nature of one of its constituents
- C09K3/1009—Fluorinated polymers, e.g. PTFE
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
- C08K5/3477—Six-membered rings
- C08K5/3492—Triazines
- C08K5/34924—Triazines containing cyanurate groups; Tautomers thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
Definitions
- the present invention relates to an elastomer composition and a sealing material using the same.
- Sealing materials are used for various purposes, and characteristics are required according to the purpose. For example, heat resistance is required when used in a high temperature environment, and resistance to plasma (plasma resistance) is required when used in an environment exposed to plasma.
- ozone which has a strong oxidizing power, may be used in the film forming process in the manufacture of semiconductor devices and flat panel displays.
- a sealing material used in a manufacturing apparatus using ozone is required to have resistance to ozone (ozone resistance).
- Patent Document 1 Japanese Patent Laid-Open No. 08-151450 (Patent Document 1), Japanese Patent Laid-Open No. 2004-263038 (Patent Document 2) and Japanese Patent Laid-Open No. 2010-037558 (Patent Document 3) disclose a sealing material focusing on ozone resistance. Have been described.
- An object of the present invention is to provide an elastomer composition which can be prepared using generally available raw materials and can form a crosslinked product exhibiting good ozone resistance in a high temperature environment, and a sealing material using the same. Especially.
- a first fluoroelastomer which is a copolymer containing a constitutional unit derived from tetrafluoroethylene and a constitutional unit derived from one or more kinds of perfluoro(alkoxy vinyl ether), and a second fluoroelastomer different from the first fluoroelastomer. And includes, or An elastomer composition containing two or more kinds of the first fluoroelastomer.
- an elastomer composition capable of forming a crosslinked product exhibiting good ozone resistance in a high temperature environment, and a sealing material using the same.
- the elastomer composition according to the present invention comprises a first fluoroelastomer which is a copolymer containing a constitutional unit derived from tetrafluoroethylene and a constitutional unit derived from one or more kinds of perfluoro(alkoxy vinyl ether), and the first fluoroelastomer.
- a different second fluoroelastomer is a different crosslinked product of the elastomer composition containing the first fluoroelastomer and the second fluoroelastomer.
- excellent ozone resistance in a high temperature environment specifically means that the physical properties of the crosslinked product of the elastomer composition change little before and after exposure to high temperature ozone.
- the change in physical properties can be indexed by the rate of change in tensile product (tensile product ratio).
- the tensile product can be obtained as ⁇ tensile strength (MPa) ⁇ elongation at break (%) ⁇ .
- the tensile strength and the elongation at break are measured according to the methods described in the section of Examples below.
- the first fluoroelastomer contains a constitutional unit derived from tetrafluoroethylene (hereinafter sometimes referred to as "TFE") and one or more constitutional units derived from perfluoro(alkoxy vinyl ether). It is a copolymer.
- the first fluoroelastomer may further include a constitutional unit derived from another fluoromonomer.
- the elastomer composition containing the first fluoroelastomer can further improve ozone resistance in a high temperature environment, as compared with the composition containing the hydrogen atom-containing fluoroelastomer.
- the first fluoroelastomer also has excellent heat resistance and chemical resistance.
- the first fluoroelastomer usually has crosslinkability.
- the cross-linking property can be imparted by further copolymerizing a cross-linking site monomer (further including a structural unit derived from the cross-linking site monomer).
- the cross-linking site means a site capable of cross-linking reaction. Examples of the crosslinking site include a halogen group (eg, I group, Br group, etc.) and a nitrile group (CN group), preferably a halogen group, and more preferably an I group.
- a fluoroelastomer having a halogen group as a cross-linking site can be cross-linked by a peroxide cross-linking system using a peroxide cross-linking agent, whereby a cross-linked product having better ozone resistance in a high temperature environment can be obtained. ..
- a crosslinking site monomer having a halogen group as a crosslinking site is a halogen group-containing perfluorovinyl ether.
- CF 2 CFO(CF 2 ) n OCF(CF 3 )X (n is, for example, 2 to 4)
- CF 2 CFO(CF 2 ) n X (n is, for example, 2 to 12)
- CF 2 CFO[CF 2 CF(CF 3 )O] m (CF 2 ) n X
- X is a halogen group, n is 2, for example, m is 1 to 5)
- the crosslinkable perfluoroelastomer may have a crosslinked structure that crosslinks between two main chains.
- the molar ratio of the TFE-derived constituent unit/perfluoro(alkoxy vinyl ether)-derived constituent unit/crosslinking site monomer-derived constituent unit in the first fluoroelastomer is usually 50 to 74.8%/25 to 49.8. %/0.2 to 5%, preferably 60 to 74.8%/25 to 39.5%/0.5 to 2%.
- the first fluoroelastomer can include two or more kinds of first fluoroelastomers which are different from each other.
- the types of the first fluoroelastomer are different from each other, the types and types of perfluoro(alkoxy vinyl ether), the ratio of TFE-derived structural units/perfluoro(alkoxy vinyl ether)-derived structural units, the first It means that at least one of the molecular weights of the fluoroelastomer is different.
- a commercially available product of the first fluoroelastomer is, for example, "Technoflon PFR-LT” manufactured by Solvay.
- the second fluoroelastomer is a fluoroelastomer different from the first fluoroelastomer. “Different from the first fluoroelastomer” means different from the first fluoroelastomer in the type of the constituent unit.
- the second fluoroelastomer preferably contains no constituent units derived from perfluoro(alkoxy vinyl ether). Examples of the second fluoroelastomer include vinylidene fluoride-based fluororubber containing vinylidene fluoride as a main component (hereinafter sometimes referred to as “FKM”) and tetrafluoroethylene-propylene rubber (hereinafter referred to as “FEPM”).
- a perfluoroelastomer other than the first fluoroelastomer hereinafter sometimes referred to as “FFKM”
- FFKM perfluoroelastomer other than the first fluoroelastomer
- a fluorine-based thermoplastic elastomer a fluorine-based thermoplastic elastomer
- fluorine-based liquid rubber a fluorosilicone rubber, and the like.
- the second fluoroelastomer is preferably a perfluoroelastomer, more preferably a copolymer containing a structural unit derived from TFE and one or more structural units derived from perfluoro(alkyl vinyl ether).
- the second fluoroelastomer may further contain a constitutional unit derived from another fluoromonomer.
- An elastomer composition in which the second fluoroelastomer is a copolymer containing a structural unit derived from TFE and a structural unit derived from perfluoro(alkyl vinyl ether) can further enhance ozone resistance under a high temperature environment.
- a copolymer containing a structural unit derived from TFE and a structural unit derived from perfluoro(alkyl vinyl ether) is also excellent in heat resistance and chemical resistance.
- the perfluoro(alkyl vinyl ether) forming the second fluoroelastomer may have an alkyl group having 1 to 5 carbon atoms, for example, perfluoro(methyl vinyl ether), perfluoro(ethyl vinyl ether), perfluoro(propyl vinyl ether). ) Etc.
- Perfluoro(alkyl vinyl ether) is preferably perfluoro(methyl vinyl ether).
- the second fluoroelastomer usually has crosslinkability.
- the cross-linking site and the cross-linking site monomer the same ones as the above-mentioned first fluoroelastomer can be used.
- the molar ratio of the TFE-derived structural unit/perfluoro(alkyl vinyl ether)-derived structural unit/crosslinking site monomer-derived structural unit in the second fluoroelastomer is usually 50 to 74.8%/25 to 49.8. %/0.2 to 5%, preferably 60 to 74.8%/25 to 39.5%/0.5 to 2%.
- the second fluoroelastomer can include two or more kinds of second fluoroelastomers of different kinds.
- the types of the second fluoroelastomer being different from each other means that at least one of the type and number of constituent units of the second fluoroelastomer, the ratio of two or more constituent units constituting the second fluoroelastomer, and the molecular weight of the second fluoroelastomer. Saying that one is different.
- second fluoroelastomers examples include "Technoflon PFR-94” manufactured by Solvay, "Dyneon PFE 90Z”, “Dyneon PFE131TZ” manufactured by 3M, and "Technoflon P459” manufactured by Solvay. ..
- the elastomer composition may include the first fluoroelastomer and the second fluoroelastomer in a mass ratio of 10:90 to 90:10, and may include a mass ratio of 20:80 to 80:20, 30:70 to 70. It may be included in a mass ratio of :30.
- the first fluoroelastomer and the second fluoroelastomer may be included so as to be equal in mass ratio.
- the elastomer composition may contain an elastomer other than the first fluoroelastomer and the second fluoroelastomer.
- examples of other elastomers include ethylene-propylene-diene rubber (EPDM), ethylene-propylene rubber (EPM), nitrile rubber (NBR; acrylonitrile butadiene rubber), hydrogenated nitrile rubber (HNBR; hydrogenated acrylonitrile butadiene rubber), butyl rubber ( IIR), silicone rubber (Q) and the like.
- EPDM ethylene-propylene-diene rubber
- EPM ethylene-propylene rubber
- NBR nitrile rubber
- HNBR hydrogenated nitrile rubber
- IIR hydrogenated acrylonitrile butadiene rubber
- silicone rubber Q
- Other elastomers may contain only 1 type and may contain 2 or more types.
- the crosslinking system of the elastomer composition is not particularly limited, and for example, FKM and FEPM are peroxide crosslinking systems, polyamine crosslinking systems and polyol crosslinking systems, and FFKM are peroxide crosslinking systems. , Bisphenol crosslinking system, triazine crosslinking system, oxazole crosslinking system, imidazole crosslinking system, thiazole crosslinking system.
- the elastomer composition may be crosslinked with any one crosslinking system or may be crosslinked with two or more crosslinking systems.
- the elastomeric composition preferably comprises a peroxide crosslinker.
- the peroxide crosslinking agent is, for example, 2,5-dimethyl-2,5-di(t-butylperoxy)hexane (examples of commercially available products: “Perhexa 25B” and “Perhexa 25B-40” manufactured by NOF CORPORATION); Millperoxide (commercial product example: “Parkmill D” manufactured by NOF CORPORATION); 2,4-dichlorobenzoyl peroxide; di-t-butyl peroxide; t-butyldicumyl peroxide; benzoyl peroxide (commercially available product) Example: NOF Corporation's “Nyper B”); 2,5-dimethyl-2,5-(t-butylperoxy)hexyne-3 (Example of commercially available product: NOF Corporation's “Perhexin 25B”); 2 ,5-Dimethyl-2,5-di(benzoylperoxy)hexane; ⁇ , ⁇ '-bis(t-buty
- Examples of the co-crosslinking agent used in the peroxide crosslinking system include triallyl isocyanurate (commercial product example: “TAIC” manufactured by Nippon Kasei Co., Ltd.); triallyl cyanurate; triallyl formal; triallyl trimellitate; N,N Examples thereof include compounds (unsaturated polyfunctional compounds) capable of co-crosslinking with radicals such as'-m-phenylene bismaleimide; dipropargyl terephthalate; diallyl phthalate; tetraallyl terephthalamide.
- the co-crosslinking agent only one kind may be used, or two or more kinds may be used in combination.
- the co-crosslinking agent preferably contains triallyl isocyanurate from the viewpoint of reactivity and compression set characteristics.
- the content of the peroxide crosslinking agent (the total amount when two or more kinds are used) in the elastomer composition is, for example, 0.01 to 20 parts by mass with respect to 100 parts by mass of the total amount of the elastomer, and the ozone resistance is improved. From this viewpoint, it is preferably 0.1 to 10 parts by mass, more preferably 0.5 to 5 parts by mass.
- the content of the co-crosslinking agent (the total amount when two or more kinds are used) in the elastomer composition is, for example, 0.1 to 40 parts by mass with respect to 100 parts by mass of the total amount of the elastomer, which improves the ozone resistance. From the viewpoint, it is preferably 0.2 to 10 parts by mass.
- the elastomer composition may contain an antioxidant, an antioxidant, a vulcanization accelerator, a processing aid (stearic acid, etc.), if necessary.
- Additives such as stabilizers, tackifiers, silane coupling agents, plasticizers, flame retardants, release agents, waxes, lubricants and the like can be included.
- a tackiness reducing (preventing) agent such as a fluorinated oil (eg, perfluoropolyether).
- a fluorinated oil eg, perfluoropolyether
- the amount of the additive is as small as possible (for example, 10 parts by weight with respect to 100 parts by mass of the total amount of the elastomer). Parts by mass or less, preferably 5 parts by mass or less, more preferably 2 parts by mass or less, still more preferably 1 part by mass or less), and it is desirable that no additive is contained.
- the elastomer composition may be carbon black, silica, alumina, zinc oxide, titanium oxide, clay, talc, diatomaceous earth, barium sulfate, calcium carbonate, magnesium carbonate, calcium oxide, mica, graphite, aluminum hydroxide, silicic acid, if necessary.
- Fillers such as aluminum, hydrotalcite, metal powder, glass powder, and ceramic powder can be included. Among these, it is preferable to contain carbon black or silica. As the filler, only one kind may be used, or two or more kinds may be used in combination.
- the content of the filler (the total amount when two or more kinds are used) in the elastomer composition is, for example, 0.1 to 40 parts by mass based on 100 parts by mass of the total amount of the elastomer, and from the viewpoint of improving ozone resistance. , Preferably 1 to 30 parts by mass.
- the elastomer composition may include an organic pigment.
- Organic pigments usable in the present invention include, for example, azo pigments (azo lake pigments, insoluble azo pigments, condensed azo pigments, etc.); anthraquinone pigments, thioindigo pigments, perinone pigments, perylene pigments, quinacridone pigments, isoindolinone. Including pigments, isoindoline pigments, dioxazine pigments, quinophthalone pigments, polycyclic pigments such as diketopyrrolopyrrole pigments, phthalocyanine pigments and the like.
- the elastomer composition may include only one type of organic pigment, or may include two or more types. As the organic pigment, an organic pigment classified as pigment in the color index can be used.
- the organic pigment does not contain a metal element. If an organic pigment containing no metal element is used, even if the sealing material is used in a harsh ozone environment such as a semiconductor application and the sealing material is etched, the substance derived from the metal element may be scattered. Absent.
- the content of the organic pigment (the total amount when two or more kinds are used) in the elastomer composition effectively improves the ozone resistance in a high temperature environment and/or the compression set characteristics in a high temperature environment. From the viewpoint, it is preferably 0.05 to 10 parts by mass, more preferably 0.07 to 5 parts by mass, and further preferably 0.1 to 2 parts by mass with respect to 100 parts by mass of the elastomer. It is 0.1 to 1.1 parts by mass.
- the elastomer composition can be prepared by uniformly kneading an elastomer, a cross-linking agent, a co-cross-linking agent, a filler added if necessary, and other compounding agents.
- a conventionally known one such as a mixing roll, a pressure kneader or an internal mixer (Banbury mixer) can be used.
- the components excluding the components that contribute to the crosslinking reaction crosslinking accelerator, crosslinking retarder, crosslinking agent, etc.
- the kneading temperature is preferably around room temperature, for example.
- a modified example of the elastomer composition according to the present invention is an elastomer composition containing two or more first fluoroelastomers.
- the above-mentioned first fluoroelastomer can be used as the first fluoroelastomer.
- a crosslinked product of an elastomer composition containing two or more first fluoroelastomers has excellent ozone resistance in a high temperature environment.
- the two or more types of first fluoroelastomers are different from each other, for example, in the type of perfluoro(alkoxy vinyl ether) constituting the first fluoroelastomer.
- the elastomer composition may further include the above-mentioned second fluoroelastomer, other elastomers, crosslinking agents, co-crosslinking agents, and other compounding agents.
- a cross-linked molding such as a sealing material
- the cross-linking molding can be performed by pre-molding the elastomer composition, if necessary, and then press-molding using a mold.
- the molding temperature is, for example, about 150 to 220° C.
- the heating time is, for example, about 0.5 to 120 minutes.
- Molding may be performed by feed press molding, injection molding, extrusion molding, or the like.
- Secondary crosslinking may be performed at a temperature of about 150 to 320° C., if necessary.
- the secondary crosslinking time is, for example, about 0.5 to 24 hours.
- a step of further irradiating with ionizing radiation to cross-link may be provided. This can further improve the compression set characteristics.
- An electron beam or ⁇ -ray can be preferably used as the ionizing radiation.
- the sealing material can be packing, gasket, etc.
- the shape of the sealing material is appropriately selected according to its application, and a typical example thereof is an O-ring having an O-shaped cross section. Since the sealing material according to the present invention exhibits good ozone resistance, the degree of vacuum in an apparatus that uses ozone, especially in a high temperature environment, such as an apparatus used in a film forming process in manufacturing semiconductor devices and flat panel displays. Can be suitably used as a sealing material for holding
- the unit of the compounding amount shown in the table below is parts by mass.
- Example 1 An elastomer composition was prepared according to the following procedure, and then a sealing material was prepared. First, according to the blending composition shown in Table 1, a predetermined amount of each blending agent was kneaded by an open roll. Next, the obtained elastomer composition was press-molded under conditions of 165° C. and 20 minutes, and then secondary cross-linking was performed by heat under conditions of 230° C. and 16 hours to obtain a sealing material.
- Tensile product ratio Tensile product before and after the ozone exposure test was determined as ⁇ tensile strength (MPa) x elongation at break (%) ⁇ , respectively.
- the compression set of the seal material was determined according to JIS K6262:2013. A wire diameter ⁇ 3.53 O-ring was held at 200°C for 72 hours at a compression rate of 25%. The thickness of the test piece was measured after releasing the compression of the test piece and allowing to cool at the standard temperature of the test room for 30 minutes.
- Example 1 shows the evaluation results.
- the sealing material of Example 1 had a smaller absolute value of the change rate of the normal state physical properties before and after the ozone test and the tensile product ratio was closer to 1 as compared with the sealing material of Comparative Example 1.
- a cross-linked product of an elastomer composition containing a first fluoroelastomer and a second fluoroelastomer, which is a copolymer of tetrafluoroethylene and perfluoro(alkoxy vinyl ether) changes its physical properties when exposed to a high temperature ozone environment. It was found that it was difficult and had excellent ozone resistance in a high temperature environment.
- the obtained cross-linked molded product (sealing material) was subjected to an ozone exposure test in which the ozone concentration was 200 g/m 3 and the temperature was 190° C. for 24 hours, and an ozone exposure test was conducted. Was measured.
- the evaluation results are shown in Table 2.
- the tensile product ratios of the crosslinked products of Examples 2 to 8 were closer to 1 than the tensile product ratios of the crosslinked products of Comparative Examples 2 and 3.
- the cross-linked product of the elastomer composition containing the first fluoroelastomer and the second fluoroelastomer in the mass ratio of 10:90 to 90:10 is an elastomer composition containing only the first fluoroelastomer or the second fluoroelastomer as a polymer. It was found that ozone resistance under a high temperature environment was superior to that of the crosslinked product.
- Example 9 Comparative Example 4> An elastomer composition was prepared according to the composition shown in Table 3, and then a sealing material was produced. The manufacturing procedure was the same as in Example 2.
- the obtained cross-linked molded product (sealing material) was subjected to an ozone exposure test in which the ozone concentration was 200 g/m 3 and the temperature was 190° C. for 24 hours, and an ozone exposure test was conducted.
- [2] Normal state physical property change rate and [3] Tensile product ratio was measured. The evaluation results are shown in Table 3.
- the tensile product ratio of the crosslinked product of Example 9 was closer to 1 than the tensile product ratio of the crosslinked product of Comparative Example 4.
- the crosslinked product of the elastomer composition containing the first fluoroelastomer and the second fluoroelastomer is more excellent in ozone resistance in a high temperature environment than the crosslinked product of the elastomer composition containing only the second fluoroelastomer as a polymer. all right. Even if a perfluoroelastomer different from those used in Examples 1 to 8 was used as the second fluoroelastomer, the ozone resistance under a high temperature environment could be improved by blending it with the first fluoroelastomer.
- Example 10 Comparative Example 5> An elastomer composition was prepared according to the composition shown in Table 4, and then a sealing material was prepared. The manufacturing procedure was the same as in Example 2.
- PFR-LT "Technoflon PFR-LT” manufactured by Solvay GA-15: “Dayer Perfuro GA-15” manufactured by Daikin Industries, Ltd.
- the filler, co-crosslinking agent and crosslinking agent are the same as those described in Table 1. is there.
- the obtained cross-linked molded product (sealing material) was subjected to an ozone exposure test in which the ozone concentration was 200 g/m 3 and the temperature was 190° C. for 24 hours, and an ozone exposure test was conducted.
- [2] Change rate of normal physical properties and [3] Tensile product ratio was measured. The evaluation results are shown in Table 4.
- the tensile product ratio of the crosslinked product of Example 10 was closer to 1 than the tensile product ratio of the crosslinked product of Comparative Example 5. It was found that the crosslinked product of the elastomer composition containing PFR-LT and GA-15 was more excellent in ozone resistance in a high temperature environment than the crosslinked product of the elastomer composition containing only GA-15 as a polymer. ..
- Example 11 Comparative Example 6> An elastomer composition was prepared according to the composition shown in Table 5, and then a sealing material was produced. The manufacturing procedure was the same as in Example 2.
- Second fluoroelastomer ternary fluororubber which is a vinylidene fluoride-hexafluoropropylene-tetrafluoroethylene copolymer (Technoflon P459, Solvay)
- the obtained cross-linked molded product (sealing material) was subjected to an ozone exposure test in which the ozone concentration was 200 g/m 3 and the temperature was 190° C. for 24 hours, and an ozone exposure test was conducted.
- [2] Normal state physical property change rate and [3] Tensile product ratio was measured. The evaluation results are shown in Table 5.
- the tensile product ratio of the crosslinked product of Example 11 was closer to 1 than the tensile product ratio of the crosslinked product of Comparative Example 6.
- the crosslinked product of the elastomer composition containing the first fluoroelastomer and the second fluoroelastomer is more excellent in ozone resistance in a high temperature environment than the crosslinked product of the elastomer composition containing only the second fluoroelastomer as a polymer. all right. Even if fluororubber was used as the second fluoroelastomer, it was possible to improve the ozone resistance in a high temperature environment by blending it with the first fluoroelastomer.
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Abstract
Description
[1] テトラフルオロエチレン由来の構成単位及び1種以上のパーフルオロ(アルコキシビニルエーテル)由来の構成単位を含む共重合体である第1フルオロエラストマーと、前記第1フルオロエラストマーとは異なる第2フルオロエラストマーと、を含む、又は、
前記第1フルオロエラストマーを2種以上含む、エラストマー組成物。
本発明に係るエラストマー組成物は、テトラフルオロエチレン由来の構成単位及び1種以上のパーフルオロ(アルコキシビニルエーテル)由来の構成単位を含む共重合体である第1フルオロエラストマーと、第1フルオロエラストマーとは異なる第2フルオロエラストマーと、を含む。第1フルオロエラストマーと、第2フルオロエラストマーとを含むエラストマー組成物の架橋物は、高温環境下における耐オゾン性に優れる。高温環境下における耐オゾン性が優れるとは、具体的には、エラストマー組成物の架橋物を高温のオゾンに暴露した前後で物性の変化が小さいことをいう。物性の変化は、抗張積の変化率(抗張積比)を指標とすることができる。抗張積は、{引張強度(MPa)×切断時伸び(%)}として求めることができる。引張強度及び切断時伸びは、それぞれ後述の実施例の欄に記載の方法に従って測定される。
第1フルオロエラストマーは、テトラフルオロエチレン(以下、「TFE」と称する場合がある。)由来の構成単位及び1種以上のパーフルオロ(アルコキシビニルエーテル)由来の構成単位を含む共重合体である。第1フルオロエラストマーは、他のフルオロモノマー由来の構成単位をさらに含んでいてもよい。第1フルオロエラストマーを含むエラストマー組成物は、水素原子含有フッ素エラストマーを含む組成物に比べて、高温環境下における耐オゾン性をより高めることができる。また、第1フルオロエラストマーは、耐熱性及び耐薬品性にも優れる。
CF2=CFOCF2CF(CF3)OCnF2n+1、
CF2=CFO(CF2)3OCnF2n+1、
CF2=CFOCF2CF(CF3)O(CF2O)mCnF2n+1、又は
CF2=CFO(CF2)2OCnF2n+1
であることができる。上記式中、nは例えば1~5であり、mは例えば1~3である。
CF2=CFO(CF2)nOCF(CF3)X(nは例えば2~4)、
CF2=CFO(CF2)nX(nは例えば2~12)、
CF2=CFO[CF2CF(CF3)O]m(CF2)nX(Xはハロゲン基、nは例えば2、mは例えば1~5)、
CF2=CFO[CF2CF(CF3)O]m(CF2)nX(Xはハロゲン基、nは例えば1~4、mは例えば1~2)、
CF2=CFO[CF2CF(CF3)O]nCF2CF(CF3)X(Xはハロゲン基、nは例えば0~4)
等を挙げることができる。
第2フルオロエラストマーは、第1フルオロエラストマーとは異なるフルオロエラストマーである。「第1フルオロエラストマーとは異なる」とは、第1フルオロエラストマーとは構成単位の種類において異なることをいう。第2フルオロエラストマーは、好ましくはパーフルオロ(アルコキシビニルエーテル)由来の構成単位を含まない。第2フルオロエラストマーとしては、例えばビニリデンフルオライドを主成分とするフッ化ビニリデン系フッ素ゴム(以下、「FKM」と称する場合がある。)、テトラフルオロエチレン-プロピレンゴム(以下、「FEPM」と称する場合がある。)、第1フルオロエラストマー以外のパーフルオロエラストマー(以下、「FFKM」と称する場合がある。)、フッ素系熱可塑性エラストマー、フッ素系液状ゴム、フロロシリコーンゴム等が挙げられる。
エラストマー組成物は、第1フルオロエラストマー及び第2フルオロエラストマー以外のエラストマーを含んでいてもよい。その他のエラストマーとしては、例えばエチレン-プロピレン-ジエンゴム(EPDM)、エチレン-プロピレンゴム(EPM)、ニトリルゴム(NBR;アクリロニトリルブタジエンゴム)、水素添加ニトリルゴム(HNBR;水素添加アクリロニトリルブタジエンゴム)、ブチルゴム(IIR)、シリコーンゴム(Q)等が挙げられる。その他のエラストマーは、1種のみを含んでもよいし、2種以上を含んでもよい。
エラストマー組成物の架橋系は特に制限されず、例えばFKM及びFEPMであればパーオキサイド架橋系、ポリアミン架橋系、ポリオール架橋系が、FFKMであればパーオキサイド架橋系、ビスフェノール架橋系、トリアジン架橋系、オキサゾール架橋系、イミダゾール架橋系、チアゾール架橋系が挙げられる。エラストマー組成物は、いずれか1種の架橋系で架橋されてもよいし、2種以上の架橋系で架橋されてもよい。エラストマー組成物は、好ましくはパーオキサイド架橋剤を含む。
エラストマー組成物は、加工性改善や物性調整等を目的として、必要に応じて、老化防止剤、酸化防止剤、加硫促進剤、加工助剤(ステアリン酸等)、安定剤、粘着付与剤、シランカップリング剤、可塑剤、難燃剤、離型剤、ワックス類、滑剤等の添加剤を含むことができる。添加剤の他の例は、フッ素系オイル(例えば、パーフルオロポリエーテル等)のような粘着性低減(防止)剤である。添加剤は1種のみを用いてもよいし、2種以上を併用してもよい。
エラストマー組成物は、エラストマー、架橋剤、共架橋剤、必要に応じて添加されるフィラー及びその他の配合剤を均一に混練りすることにより調製できる。混練り機としては、例えばミキシングロール、加圧ニーダー、インターナルミキサー(バンバリーミキサー)等の従来公知のものを用いることができる。この際、各配合成分のうち、架橋反応に寄与する成分(架橋促進剤、架橋遅延剤、架橋剤等)を除く成分を先に均一に混練しておき、その後、架橋反応に寄与する成分を混練するようにしてもよい。混練り温度は、例えば常温付近が好ましい。
上記エラストマー組成物を架橋成形(加硫成形)することにより、シール材のような架橋成形物を得ることができる。すなわち、シール材は、エラストマー組成物の架橋物からなる。架橋成形は、必要に応じてエラストマー組成物を予備成形した後、金型を用いてプレス成形することにより行うことができる。成形温度は、例えば150~220℃程度であり、加熱時間(架橋時間)は、例えば0.5~120分程度である。送りプレス成形、インジェクション成形、押出成形等により成形を行ってもよい。必要に応じて、150~320℃程度の温度で二次架橋を行ってもよい。二次架橋時間は、例えば0.5~24時間程度である。
次の手順に従って、エラストマー組成物を調製し、次いでシール材を作製した。まず、表1に示される配合組成に従って、各配合剤の所定量をオープンロールにより混練した。次に、得られたエラストマー組成物を165℃、20分の条件でプレス成形した後、230℃、16時間の条件で熱による2次架橋を行ってシール材を得た。
〔1〕第1フルオロエラストマー:テトラフルオロエチレン-パーフルオロ(アルコキシビニルエーテル)-ハロゲン原子含有モノマー共重合体であるパーフルオロエラストマー(テクノフロン PFR-LT、ソルベイ社製)
〔2〕第2フルオロエラストマー:テトラフルオロエチレン-パーフルオロ(アルキルビニルエーテル)-ハロゲン原子含有モノマー共重合体であるパーフルオロエラストマー(テクノフロン PFR-94、ソルベイ社製)
〔3〕フィラー:カーボンブラック(Thermax N990 ULTRA-PURE、Cancarb Limited製)
〔4〕共架橋剤:トリアリルイソシアヌレート(TAIC、日本化成社製)
〔5〕架橋剤:2,5-ジメチル-2,5-ジ-t-ブチル-パーオキシヘキサン(パーヘキサ25B、日油株式会社製)
得られた架橋成形品(シール材)をオゾン濃度200g/m3、温度160℃の環境下に72時間置くオゾン暴露試験を行い、下記の項目を測定、評価した。
試験前後のシール材の重量を測定し、下記式:
重量減少率(%)={(試験前の重量-試験後の重量)/(試験前の重量)}×100に従って重量減少率を求めた。
オゾン暴露試験前後の常態物性を測定し、変化率を求めた。常態物性は、以下のように求めた。JIS K6250:2006に従い、2mmの厚さに作製したシート状成形品から、JIS K6251:2010に従い、ダンベル状3号型試験片を型抜きした。この試験片を、500mm/分で引張し、引張強度、切断時伸び、100%モジュラスをショッパー式引張試験機を用いて測定した。変化率は、
変化率(%)={(試験前の値-試験後の値)/(試験前の値)}×100
として求めた。
変化率=(試験前の値-試験後の値)
として求めた。
オゾン暴露試験前と試験後の抗張積を{引張強度(MPa)×切断時伸び(%)}としてそれぞれ求めた。抗張積比は下記式:
抗張積比=(試験前の抗張積)/(試験後の抗張積)
で求めることができる。抗張積比が1に近いほど、抗張積の変化が小さく、高温環境下における耐オゾン性に優れると評価することができる。
JIS K6262:2013に準拠してシール材の圧縮永久歪を求めた。線径φ3.53 Oリングを200℃×72時間、圧縮率25%で保持した。試験片の圧縮を解放し、試験室の標準温度で30分間放冷した後に、試験片の厚さを測定した。圧縮永久歪率(Compression Set、CS)は下記式:
圧縮永久歪率(%)={(h0-h1)/(h0-h2)}×100
に基づいて算出した。h0は試験前の試験片の厚さ(mm)、h1は30分間放冷後の試験片の厚さ(mm)、h2はスペーサ-の厚み(高さ)(mm)である。
表2に示される配合組成に従って、エラストマー組成物を調製し、次いでシール材を作製した。作製手順は、2次架橋を230℃、4時間の条件で行った以外は、実施例1と同じであった。
表3に示される配合組成に従ってエラストマー組成物を調製し、次いでシール材を作製した。作製手順は、実施例2と同じであった。
〔2〕第2フルオロエラストマー:テトラフルオロエチレン-パーフルオロ(アルキルビニルエーテル)-ハロゲン原子含有モノマー共重合体であるパーフルオロエラストマー(ダイニオン PFE 90Z、3M社製)
表4に示される配合組成に従ってエラストマー組成物を調製し、次いでシール材を作製した。作製手順は、実施例2と同じであった。
PFR-LT:「テクノフロン PFR-LT」ソルベイ社製
GA-15:「ダイエルパーフロ GA-15」ダイキン工業株式会社製
フィラー、共架橋剤および架橋剤は、表1に記載のものと同じである。
表5に示される配合組成に従ってエラストマー組成物を調製し、次いでシール材を作製した。作製手順は、実施例2と同じであった。
〔2〕第2フルオロエラストマー:ビニリデンフルオライド-ヘキサフルオロプロピレン-テトラフルオロエチレン共重合体である三元系フッ素ゴム(テクノフロン P459、ソルベイ社)
Claims (6)
- テトラフルオロエチレン由来の構成単位及び1種以上のパーフルオロ(アルコキシビニルエーテル)由来の構成単位を含む共重合体である第1フルオロエラストマーと、前記第1フルオロエラストマーとは異なる第2フルオロエラストマーと、を含む、又は、
前記第1フルオロエラストマーを2種以上含む、エラストマー組成物。 - 前記第2フルオロエラストマーは、パーフルオロエラストマーである、請求項1に記載のエラストマー組成物。
- 前記第2フルオロエラストマーは、テトラフルオロエチレン由来の構成単位及び1種以上のパーフルオロ(アルキルビニルエーテル)由来の構成単位を含む共重合体である、請求項2に記載のエラストマー組成物。
- 前記第1フルオロエラストマー及び前記第2フルオロエラストマーを10:90~90:10の質量比で含む、請求項1~3のいずれか1項に記載のエラストマー組成物。
- パーオキサイド架橋剤及び共架橋剤をさらに含む、請求項1~4のいずれか1項に記載のエラストマー組成物。
- 請求項1~5のいずれか1項に記載のエラストマー組成物の架橋物からなるシール材。
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