WO2011135668A1 - 冷媒輸送用ホース - Google Patents
冷媒輸送用ホース Download PDFInfo
- Publication number
- WO2011135668A1 WO2011135668A1 PCT/JP2010/057446 JP2010057446W WO2011135668A1 WO 2011135668 A1 WO2011135668 A1 WO 2011135668A1 JP 2010057446 W JP2010057446 W JP 2010057446W WO 2011135668 A1 WO2011135668 A1 WO 2011135668A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rubber
- layer
- polyamide
- mass
- parts
- Prior art date
Links
- 239000003507 refrigerant Substances 0.000 title claims abstract description 47
- 229920001971 elastomer Polymers 0.000 claims abstract description 228
- 239000005060 rubber Substances 0.000 claims abstract description 228
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims abstract description 78
- 239000000203 mixture Substances 0.000 claims abstract description 52
- 239000004952 Polyamide Substances 0.000 claims abstract description 48
- 229920002647 polyamide Polymers 0.000 claims abstract description 48
- 229960001545 hydrotalcite Drugs 0.000 claims abstract description 43
- 229910001701 hydrotalcite Inorganic materials 0.000 claims abstract description 43
- 239000011347 resin Substances 0.000 claims abstract description 41
- 229920005989 resin Polymers 0.000 claims abstract description 41
- 229920006122 polyamide resin Polymers 0.000 claims abstract description 37
- 239000011342 resin composition Substances 0.000 claims abstract description 36
- 229920001577 copolymer Polymers 0.000 claims abstract description 25
- 229920005549 butyl rubber Polymers 0.000 claims abstract description 23
- 229920005555 halobutyl Polymers 0.000 claims abstract description 19
- 229920000098 polyolefin Polymers 0.000 claims abstract description 19
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 14
- 239000002994 raw material Substances 0.000 claims abstract description 8
- GDVKFRBCXAPAQJ-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Mg+2].[Al+3].[Al+3].[O-]C([O-])=O GDVKFRBCXAPAQJ-UHFFFAOYSA-A 0.000 claims abstract 5
- 239000010410 layer Substances 0.000 claims description 248
- 230000004888 barrier function Effects 0.000 claims description 89
- 239000006229 carbon black Substances 0.000 claims description 19
- 230000003014 reinforcing effect Effects 0.000 claims description 18
- 229920002943 EPDM rubber Polymers 0.000 claims description 13
- 238000010521 absorption reaction Methods 0.000 claims description 10
- 229920002292 Nylon 6 Polymers 0.000 claims description 6
- 239000012790 adhesive layer Substances 0.000 claims description 5
- 229920000571 Nylon 11 Polymers 0.000 claims description 3
- 229920000299 Nylon 12 Polymers 0.000 claims description 3
- 241000872198 Serjania polyphylla Species 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims description 3
- 238000013329 compounding Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 87
- PWZFXELTLAQOKC-UHFFFAOYSA-A dialuminum;hexamagnesium;carbonate;hexadecahydroxide;tetrahydrate Chemical compound 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 description 41
- 239000000853 adhesive Substances 0.000 description 25
- 230000001070 adhesive effect Effects 0.000 description 25
- 230000032258 transport Effects 0.000 description 19
- 238000004073 vulcanization Methods 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 14
- 238000012360 testing method Methods 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 12
- -1 ethylene, propylene Chemical group 0.000 description 11
- 239000000126 substance Substances 0.000 description 11
- 239000011777 magnesium Substances 0.000 description 9
- 229910052736 halogen Inorganic materials 0.000 description 7
- 150000002367 halogens Chemical class 0.000 description 7
- RRHGJUQNOFWUDK-UHFFFAOYSA-N Isoprene Chemical compound CC(=C)C=C RRHGJUQNOFWUDK-UHFFFAOYSA-N 0.000 description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 6
- 239000004957 Zytel Substances 0.000 description 6
- 229920006102 Zytel® Polymers 0.000 description 6
- 239000000654 additive Substances 0.000 description 6
- 239000000835 fiber Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000003921 oil Substances 0.000 description 6
- 239000003431 cross linking reagent Substances 0.000 description 5
- 235000014113 dietary fatty acids Nutrition 0.000 description 5
- 229930195729 fatty acid Natural products 0.000 description 5
- 239000000194 fatty acid Substances 0.000 description 5
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 description 5
- 239000006057 Non-nutritive feed additive Substances 0.000 description 4
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 4
- 239000000956 alloy Substances 0.000 description 4
- 229910045601 alloy Inorganic materials 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 229920005557 bromobutyl Polymers 0.000 description 4
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- 230000032798 delamination Effects 0.000 description 4
- 150000001993 dienes Chemical class 0.000 description 4
- 238000001125 extrusion Methods 0.000 description 4
- 150000004665 fatty acids Chemical class 0.000 description 4
- 239000000314 lubricant Substances 0.000 description 4
- 239000000395 magnesium oxide Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 description 3
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical group CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 230000003712 anti-aging effect Effects 0.000 description 3
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Chemical group BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 3
- 229910052794 bromium Chemical group 0.000 description 3
- 125000004432 carbon atom Chemical group C* 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
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- 239000002270 dispersing agent Substances 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
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- 239000004014 plasticizer Substances 0.000 description 3
- 239000012744 reinforcing agent Substances 0.000 description 3
- OJOWICOBYCXEKR-KRXBUXKQSA-N (5e)-5-ethylidenebicyclo[2.2.1]hept-2-ene Chemical compound C1C2C(=C/C)/CC1C=C2 OJOWICOBYCXEKR-KRXBUXKQSA-N 0.000 description 2
- LVGUZGTVOIAKKC-UHFFFAOYSA-N 1,1,1,2-tetrafluoroethane Chemical compound FCC(F)(F)F LVGUZGTVOIAKKC-UHFFFAOYSA-N 0.000 description 2
- FXRLMCRCYDHQFW-UHFFFAOYSA-N 2,3,3,3-tetrafluoropropene Chemical compound FC(=C)C(F)(F)F FXRLMCRCYDHQFW-UHFFFAOYSA-N 0.000 description 2
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 2
- JLBJTVDPSNHSKJ-UHFFFAOYSA-N 4-Methylstyrene Chemical compound CC1=CC=C(C=C)C=C1 JLBJTVDPSNHSKJ-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 description 2
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 239000006237 Intermediate SAF Substances 0.000 description 2
- 239000005662 Paraffin oil Substances 0.000 description 2
- 235000021355 Stearic acid Nutrition 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 125000000217 alkyl group Chemical group 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- XBDQKXXYIPTUBI-UHFFFAOYSA-N dimethylselenoniopropionate Natural products CCC(O)=O XBDQKXXYIPTUBI-UHFFFAOYSA-N 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 150000004820 halides Chemical class 0.000 description 2
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
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- 238000005259 measurement Methods 0.000 description 2
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- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 239000008117 stearic acid Substances 0.000 description 2
- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical compound CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 description 2
- 229960002447 thiram Drugs 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
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- 235000014692 zinc oxide Nutrition 0.000 description 2
- 239000011787 zinc oxide Substances 0.000 description 2
- PRBHEGAFLDMLAL-GQCTYLIASA-N (4e)-hexa-1,4-diene Chemical compound C\C=C\CC=C PRBHEGAFLDMLAL-GQCTYLIASA-N 0.000 description 1
- PKMTWMDBJHRDBM-ODZAUARKSA-N (z)-but-2-enedioic acid;zinc Chemical compound [Zn].OC(=O)\C=C/C(O)=O PKMTWMDBJHRDBM-ODZAUARKSA-N 0.000 description 1
- OWRCNXZUPFZXOS-UHFFFAOYSA-N 1,3-diphenylguanidine Chemical compound C=1C=CC=CC=1NC(=N)NC1=CC=CC=C1 OWRCNXZUPFZXOS-UHFFFAOYSA-N 0.000 description 1
- WHFHDVDXYKOSKI-UHFFFAOYSA-N 1-ethenyl-4-ethylbenzene Chemical compound CCC1=CC=C(C=C)C=C1 WHFHDVDXYKOSKI-UHFFFAOYSA-N 0.000 description 1
- HECLRDQVFMWTQS-RGOKHQFPSA-N 1755-01-7 Chemical compound C1[C@H]2[C@@H]3CC=C[C@@H]3[C@@H]1C=C2 HECLRDQVFMWTQS-RGOKHQFPSA-N 0.000 description 1
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 description 1
- JMMZCWZIJXAGKW-UHFFFAOYSA-N 2-methylpent-2-ene Chemical compound CCC=C(C)C JMMZCWZIJXAGKW-UHFFFAOYSA-N 0.000 description 1
- TXLINXBIWJYFNR-UHFFFAOYSA-N 4-phenylpyridine-2-carbonitrile Chemical compound C1=NC(C#N)=CC(C=2C=CC=CC=2)=C1 TXLINXBIWJYFNR-UHFFFAOYSA-N 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
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- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 241001441571 Hiodontidae Species 0.000 description 1
- AFCARXCZXQIEQB-UHFFFAOYSA-N N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]-2-[[3-(trifluoromethoxy)phenyl]methylamino]pyrimidine-5-carboxamide Chemical compound O=C(CCNC(=O)C=1C=NC(=NC=1)NCC1=CC(=CC=C1)OC(F)(F)F)N1CC2=C(CC1)NN=N2 AFCARXCZXQIEQB-UHFFFAOYSA-N 0.000 description 1
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- 239000004698 Polyethylene Substances 0.000 description 1
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- 229920000297 Rayon Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 229920002978 Vinylon Polymers 0.000 description 1
- 125000002777 acetyl group Chemical group [H]C([H])([H])C(*)=O 0.000 description 1
- 150000008065 acid anhydrides Chemical class 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
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- 125000004429 atom Chemical group 0.000 description 1
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- 150000001875 compounds Chemical class 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- AFZSMODLJJCVPP-UHFFFAOYSA-N dibenzothiazol-2-yl disulfide Chemical compound C1=CC=C2SC(SSC=3SC4=CC=CC=C4N=3)=NC2=C1 AFZSMODLJJCVPP-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 1
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- 150000002357 guanidines Chemical class 0.000 description 1
- 239000004312 hexamethylene tetramine Substances 0.000 description 1
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 229920003049 isoprene rubber Polymers 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
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- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 1
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- 229920001778 nylon Polymers 0.000 description 1
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 1
- 239000010690 paraffinic oil Substances 0.000 description 1
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- 239000005011 phenolic resin Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
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- 239000004645 polyester resin Substances 0.000 description 1
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- 229920001155 polypropylene Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000010734 process oil Substances 0.000 description 1
- 235000019260 propionic acid Nutrition 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- IUVKMZGDUIUOCP-BTNSXGMBSA-N quinbolone Chemical compound O([C@H]1CC[C@H]2[C@H]3[C@@H]([C@]4(C=CC(=O)C=C4CC3)C)CC[C@@]21C)C1=CCCC1 IUVKMZGDUIUOCP-BTNSXGMBSA-N 0.000 description 1
- 239000002964 rayon Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 1
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- WDHVIZKSFZNHJB-UHFFFAOYSA-L zinc;butanoate Chemical compound [Zn+2].CCCC([O-])=O.CCCC([O-])=O WDHVIZKSFZNHJB-UHFFFAOYSA-L 0.000 description 1
- XKMZOFXGLBYJLS-UHFFFAOYSA-L zinc;prop-2-enoate Chemical compound [Zn+2].[O-]C(=O)C=C.[O-]C(=O)C=C XKMZOFXGLBYJLS-UHFFFAOYSA-L 0.000 description 1
- XDWXRAYGALQIFG-UHFFFAOYSA-L zinc;propanoate Chemical compound [Zn+2].CCC([O-])=O.CCC([O-])=O XDWXRAYGALQIFG-UHFFFAOYSA-L 0.000 description 1
Images
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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
- F16L11/08—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
- F16L11/085—Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall comprising one or more braided layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a non-planar shape
- B32B1/08—Tubular products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/04—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B25/08—Layered products comprising a layer of natural or synthetic rubber comprising rubber as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/10—Layered products comprising a layer of natural or synthetic rubber next to a fibrous or filamentary layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/16—Layered products comprising a layer of natural or synthetic rubber comprising polydienes homopolymers or poly-halodienes homopolymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B25/00—Layered products comprising a layer of natural or synthetic rubber
- B32B25/18—Layered products comprising a layer of natural or synthetic rubber comprising butyl or halobutyl rubber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/00507—Details, e.g. mounting arrangements, desaeration devices
- B60H1/00557—Details of ducts or cables
- B60H1/00571—Details of ducts or cables of liquid ducts, e.g. for coolant liquids or refrigerants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2270/00—Resin or rubber layer containing a blend of at least two different polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
- B32B2307/7242—Non-permeable
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2597/00—Tubular articles, e.g. hoses, pipes
-
- 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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
- F16L2011/047—Hoses, i.e. flexible pipes made of rubber or flexible plastics with a diffusion barrier layer
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1303—Paper containing [e.g., paperboard, cardboard, fiberboard, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/1355—Elemental metal containing [e.g., substrate, foil, film, coating, etc.]
- Y10T428/1359—Three or more layers [continuous layer]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/139—Open-ended, self-supporting conduit, cylinder, or tube-type article
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
- Y10T428/1352—Polymer or resin containing [i.e., natural or synthetic]
- Y10T428/139—Open-ended, self-supporting conduit, cylinder, or tube-type article
- Y10T428/1393—Multilayer [continuous layer]
Definitions
- the present invention relates to a refrigerant transport hose.
- Patent Document 1 a hose for transporting a refrigerant used in a car air conditioner or the like
- Patent Document 2 a laminate of a resin and rubber obtained by combining a resin material such as polyamide having low gas permeability and a rubber material.
- an object of the present invention is to provide a hose excellent in adhesion between a gas barrier layer and a rubber layer.
- a refrigerant transport hose comprising an inner tube layer comprising a gas barrier layer and a rubber layer adjacent to the outer surface thereof
- the gas barrier layer is composed of a polyamide resin composition containing 0.5 to 20 parts by mass of hydrotalcite with respect to 100 parts by mass of a modified polyamide obtained by blending a polyamide and a carboxyl group-containing modified polyolefin.
- the rubber layer is made of a rubber composition obtained by blending 1 to 15 parts by mass of an alkylphenol formaldehyde resin with respect to 100 parts by mass of a raw rubber.
- the raw material rubber includes at least one selected from the group consisting of BIMS and a copolymer rubber which is butyl rubber and / or halogenated butyl rubber is excellent in adhesion between the gas barrier layer and the rubber layer.
- a refrigerant transport hose comprising an inner tube layer comprising a gas barrier layer and a rubber layer adjacent to the outer surface thereof
- the gas barrier layer is composed of a polyamide resin composition containing 0.5 to 20 parts by mass of hydrotalcite with respect to 100 parts by mass of a modified polyamide obtained by blending a polyamide and a carboxyl group-containing modified polyolefin.
- the rubber layer is made of a rubber composition obtained by blending 1 to 15 parts by mass of an alkylphenol formaldehyde resin with respect to 100 parts by mass of a raw rubber.
- a refrigerant transport hose wherein the raw rubber contains at least one selected from the group consisting of BIMS, and copolymer rubber which is butyl rubber and / or halogenated butyl rubber. 2.
- the rubber composition is further blended with 30 to 80 parts by mass of carbon black with respect to 100 parts by mass of the raw rubber.
- the raw rubber includes BIMS, a copolymer rubber which is butyl rubber and / or halogenated butyl rubber, and EPDM,
- the BIMS content is 5 to 40 parts by mass
- the total content of the BIMS and the copolymer rubber is 20 to 80 parts by mass
- the EPDM content is 80 to 20 parts by mass.
- the carbon black is N 2 SA ⁇ 75m 2 / g , and a refrigerant transporting hose according to claim 1 which is DBP absorption ⁇ 90cm 3 / 100g. 3.
- the polyamide is a group consisting of polyamide 6, polyamide 11, polyamide 12, polyamide 4-6, polyamide 6-6, polyamide 6-10, polyamide 6-12 and polyamide MXD-6, and two or more copolymers thereof.
- the refrigerant transport hose of the present invention has excellent adhesion between the gas barrier layer and the rubber layer.
- FIG. 1 is a perspective view schematically showing a cutout of each layer of an example of a preferred embodiment of the hose of the present invention.
- the refrigerant transport hose of the present invention is a refrigerant transport hose comprising an inner tube layer comprising a gas barrier layer and a rubber layer adjacent to the outer surface thereof, wherein the gas barrier layer comprises a polyamide and a carboxyl group-containing modified polyolefin. It consists of a polyamide resin composition containing 0.5 to 20 parts by mass of hydrotalcite with respect to 100 parts by mass of the modified polyamide obtained by blending, and the rubber layer is alkylphenol with respect to 100 parts by mass of raw rubber.
- Formaldehyde resin composed of a rubber composition blended with 1 to 15 parts by mass, and the raw rubber contains at least one selected from the group consisting of BIMS and copolymer rubber which is butyl rubber and / or halogenated butyl rubber A hose.
- the refrigerant transport hose of the present invention may be referred to as “the hose of the present invention”.
- the hose of the present invention is a refrigerant transport hose provided with an inner tube layer comprising a gas barrier layer and a rubber layer adjacent to the outer surface thereof. There is no adhesive layer between the gas barrier layer and the rubber layer.
- the hose of the present invention is included even in the case where the inner tube layer only is formed and no other layer is formed.
- the configuration of the hose of the present invention will be described later using a specific example, but may be the same as the conventional one.
- the gas barrier layer in the hose of the present invention comprises a polyamide resin composition containing 0.5 to 20 parts by mass of hydrotalcite with respect to 100 parts by mass of the modified polyamide obtained by blending polyamide and carboxyl group-containing modified polyolefin. Formed using.
- Hydrotalcite is a powerful halogen catcher.
- hydrotalcite is a halogen (eg, chlorine) contained in a halide (eg, halogenated butyl rubber, BIMS, halogenated alkylphenol formaldehyde resin) contained in a rubber layer (rubber composition) adjacent to the gas barrier layer. Atoms and bromine atoms) can be actively extracted from the halide.
- the amount of reaction between the carboxyl group of the carboxyl group-containing modified polyolefin in the gas barrier layer (polyamide resin composition) and the rubber layer (rubber composition) contains hydrotalcite at the interface between the gas barrier layer and the rubber layer. More than if not.
- the crosslink density between the gas barrier layer and the rubber layer is increased and the adhesiveness between the gas barrier layer and the rubber layer is excellent.
- the alkylphenol formaldehyde resin as a crosslinking agent contained in the rubber composition is halogenated, hydrotalcite extracts halogen from the halogenated alkylphenol formaldehyde resin, so that the reaction between the raw rubber and the crosslinking agent occurs.
- the rubber layer in the vicinity of the interface with the gas barrier layer increases in crosslink density and the rubber layer becomes stronger, the crosslink density between the gas barrier layer and the rubber layer increases as described above, thereby bonding the gas barrier layer and the rubber layer. It is thought that the property is more excellent.
- Polyamide is not particularly limited. Of these, polyamide 6, polyamide 11, polyamide 12, polyamide 4-6, polyamide 6-6, polyamide 6-10, polyamide 6-12, polyamide MXD-6, and polyamide MXD-6 and two of these are preferred from the standpoint of excellent refrigerant permeation resistance. It is preferably at least one selected from the group consisting of more than one type of copolymer.
- carboxyl group-containing modified polyolefin examples include a functional group of about 0.1 by graft polymerization of an acid anhydride such as maleic anhydride to a polyolefin obtained by homopolymerizing or copolymerizing an olefin such as ethylene, propylene or butadiene, or a diene monomer.
- a modified polyolefin introduced with ⁇ 10 mol% is preferably used.
- the blend ratio (mass ratio) of the polyamide and the carboxyl group-containing modified polyolefin is preferably 90/10 to 50/50, more preferably 85/15 to 65/35, from the viewpoint of better adhesion between the gas barrier layer and the rubber layer. preferable. Increasing the proportion of the carboxyl group-containing modified polyolefin improves the flexibility of the hose of the present invention, but may reduce the refrigerant permeation resistance. Tend to be inferior.
- the modified polyamide is not particularly limited as long as it is obtained by blending polyamide and carboxyl group-containing modified polyolefin.
- the modified polyamide can be an alloy of polyamide and carboxyl group-containing modified polyolefin.
- modified polyamide examples include a Zytel ST series such as Zytel ST801, Zytel ST811, and Zytel ST811HS manufactured by DuPont, which is considered to be an alloy of polyamide 6 and maleic anhydride-modified polyolefin.
- the hydrotalcite is described below.
- the hydrotalcite contained in the polyamide resin composition is not particularly limited.
- the hydrotalcite may be a natural product or a synthetic product. Specifically, for example, Mg 3 ZnAl 2 (OH) 12 CO 3 .wH 2 O (w represents a positive real number), Mg x Al y (OH) 2x + 3y-2 CO 3 ⁇ wH 2 O (where x is 1 ⁇ 10, y is 1 ⁇ 10, w represents a positive real number.), Mg x Al y (OH) 2x + 3y-2 CO 3 [ where x is 1-10, y represents 1 to 10.
- Mg 4.3 Al 2 (OH) 12.6 CO 3 (trade name DHT-4A-2, manufactured by Kyowa Chemical Industry Co., Ltd.)] Mg 1-x Al x O 3.83x (0.2 ⁇ x ⁇ 0.5.
- Mg 0.7 Al 0.3 O 1.15 (trade name KW-2200, manufactured by Kyowa Chemical Industry Co., Ltd.))].
- hydrotalcite is superior in terms of adhesion between the gas barrier layer and the rubber layer, and has a high halogen catching capability.
- Hydrotalcite has a small amount of OH, and Mg 1-x Al x O 3.83x is preferable. Mg 0.7 Al 0.3 O 1.15 is more preferable.
- Hydrotalcite having a small amount of OH in the chemical structure can be produced, for example, by firing (under high temperature conditions) raw material hydrotalcite (for example, hydrotalcite obtained by synthesis).
- hydrotalcite Commercial products can be used as hydrotalcite.
- Examples of commercial products of hydrotalcite include DHT series (DHT-4A-2, DHT-4C) manufactured by Kyowa Chemical Industry Co., Ltd., KW series manufactured by the same company (DHT series, DHT series that has been fired at a higher temperature, DHT The halogen catching ability tends to be higher than that of the series: KW-2000, KW-2100, KW-2200), and STABIOCE HT series manufactured by Sakai Chemical Industry.
- hydrotalcite is a synthetic product
- examples of its production method include conventionally known ones.
- Hydrotalcite is surface treated with a surface treatment agent such as fatty acid (including higher fatty acid), fatty acid ester, etc. from the viewpoint of high halogen catching ability and superior adhesion between the gas barrier layer and the rubber layer. It can be assumed that the surface of the hydrotalcite is not treated. Hydrotalcite can be used alone or in combination of two or more.
- the amount of hydrotalcite is 0.5 to 20 parts by mass with respect to 100 parts by mass of the modified polyamide.
- the adhesion between the gas barrier layer and the rubber layer is excellent, and the flexibility (the flexibility of the gas barrier layer and the entire hose is low.
- the bending rigidity of the hose itself is low, and it is easy to handle in the engine room.
- non-vibration transmission characteristics the vibration from the compressor for refrigerant compression is not easily transmitted to the body side of the car and is less affected by vibration and noise in the car).
- the amount of hydrotalcite is superior due to the adhesion between the gas barrier layer and the rubber layer, and is excellent in flexibility and non-vibration transmission, and the balance between these adhesion, flexibility and non-vibration transmission is good Therefore, the amount is preferably 2 to 15 parts by mass, more preferably 3 to 15 parts by mass with respect to 100 parts by mass of the modified polyamide.
- the polyamide resin composition can contain additives as long as it does not impair the purpose of the present invention.
- the additive include a filler, a reinforcing agent, an anti-aging agent, a plasticizer, a pigment (dye), a tackifier, a lubricant, a dispersant, and a processing aid.
- the production of the polyamide resin composition is not particularly limited.
- modified polyamide and hydrotalcite and an additive that can be used as necessary are mixed using a twin-screw kneading extruder.
- the mixing temperature is preferably 180 to 300 ° C., more preferably 200 to 280 ° C., from the viewpoint of excellent mixing processability.
- the Young's modulus of a cured product (for example, a sheet) formed from the polyamide resin composition is preferably 300 MPa or less, and more preferably 270 MPa or less.
- the Young's modulus of the cured product is 300 MPa or less, it is excellent in flexibility and non-vibration transmission.
- the Young's modulus of the cured product exceeds 300 MPa, the bending rigidity of the hose itself is increased, the handling performance in the engine room is poor, the vibration of the compressor for refrigerant compression is transmitted to the vehicle body side, and vibration and sound Problems are likely to occur.
- the amount of hydrotalcite relative to 100 parts by mass of the modified polyamide is 0.5 to 20 parts by mass
- the Young's modulus of the cured product can be 300 MPa or less.
- the Young's modulus is prepared by using a polyamide resin composition at a temperature of 230 ° C., and cutting out a test piece having a width of 5 mm, a length of 80 mm, and a thickness of 0.15 mm from the sheet. It was measured according to JIS K 7161 at a tensile speed of 50 mm / min.
- the gas barrier layer can be formed by extruding a polyamide resin composition into a tubular shape, for example.
- the thickness of the gas barrier layer is not particularly limited, but is preferably 0.01 to 0.50 mm, more preferably 0.05 to 0.30 mm, and even more preferably 0.05 to 0.20 mm. Within such a range, molding workability, refrigerant permeation resistance, and flexibility tend to be better.
- the rubber layer will be described.
- the rubber layer is formed using a rubber composition in which alkylphenol formaldehyde resin: 1 to 15 parts by mass is blended with 100 parts by mass of raw rubber, and the raw rubber is BIMS, butyl rubber and / or halogen. And at least one selected from the group consisting of copolymer rubbers, which are butyl rubber.
- the raw rubber contains at least one selected from the group consisting of BIMS and copolymer rubbers which are butyl rubber and / or halogenated butyl rubber.
- the raw rubber can be crosslinked with a phenolic resin.
- BIMS is a bromide of a copolymer rubber of p-alkylstyrene and isomonoolefin.
- BIMS includes, for example, a p-alkylstyrene (PAS) content of 5 to 25% by mass, a bromine (Br) content of 1.5% by mass or more, and a mass ratio of p-alkylstyrene units to bromine units.
- PAS p-alkylstyrene
- Br bromine
- Is a bromide of a copolymer rubber of an isomonoolefin having 4 to 7 carbon atoms and p-alkylstyrene, wherein is 0.15 ⁇ Br / PAS ⁇ 0.40.
- Specific examples include brominated isobutylene p-methylstyrene copolymer rubber.
- BIMS has a Mooney viscosity (ML1 + 8, 125 ° C.)
- Examples of the isomonoolefin having 4 to 7 carbon atoms include isobutylene.
- Examples of p-alkylstyrene include styrene having an alkyl group having 1 to 5 carbon atoms in the para position, such as p-methylstyrene and p-ethylstyrene.
- the content of p-alkylstyrene in BIMS is 5 to 25% by mass, preferably 5 to 10% by mass, for all those having a p-alkylstyrene skeleton including brominated products of alkyl groups of p-alkylstyrene. .
- When it is 25% by mass or less, the rubber composition does not become brittle at a low temperature and is excellent in cold resistance.
- Exxpro 3745 manufactured by the same company, which is a bromide of a copolymer rubber of isobutylene and p-methylstyrene, can be mentioned.
- the copolymer rubber that can be contained in the raw rubber will be described.
- the copolymer rubber is butyl rubber and / or halogenated butyl rubber, and is preferably halogenated butyl rubber. It is because the adhesiveness of the hose of the present invention obtained is more excellent and the durability is increased.
- the butyl rubber general isobutylene / isoprene rubber can be used, and is not particularly limited, but the content of isoprene is 0.6 to 2.5 mol% as the degree of unsaturation, and the molecular weight is 35 to 60 (125 in Mooney viscosity). ° C).
- Examples of the halogenated butyl rubber include chlorinated butyl rubber and brominated butyl rubber.
- halogenated butyl rubbers can also be general ones.
- the chlorine content is 1 to 2.5% by mass
- the isoprene content is 0.6 to 0.6 as the degree of unsaturation. It is preferably 2.5 mol% and the molecular weight is 30 to 60 (125 ° C.) in Mooney viscosity.
- the bromine content is 1 to 2.5 mass%
- the isoprene content is 0.6 to 2.5 mol% as the degree of unsaturation
- the molecular weight is 25 to 55 (125 ° C.) in Mooney viscosity. ) Is preferable.
- the raw rubber can further contain EPDM.
- the EPDM that can be further contained in the raw rubber is not particularly limited as long as it is a general copolymer rubber obtained by polymerizing a monomer containing ethylene, propylene, and a diene.
- An example of a commercially available product is Mitsui EPT 4070 manufactured by Mitsui Chemicals.
- the propylene content is preferably 10 to 70 mol%, more preferably 15 to 50 mol%.
- Examples of the diene component include ethylidene norbornene, dicyclopentadiene, and 1,4-hexadiene. Among these, ethylidene norbornene having a high crosslinking rate is preferable.
- the amount of the diene component is preferably from 3 to 25 in terms of iodine value, and more preferably from 5 to 20.
- the raw rubber preferably contains BIMS, copolymer rubber which is butyl rubber and / or halogenated butyl rubber, and EPDM.
- the content of BIMS in the raw rubber is preferably 5 to 40 parts by mass.
- the total content of BIMS and copolymer rubber which is butyl rubber and / or halogenated butyl rubber in the raw rubber is preferably 20 to 80 parts by mass.
- the EPDM content in the raw rubber is preferably 80 to 20 parts by mass.
- the content of BIMS is less than 5 parts by mass, it is difficult to obtain the required rubber attachment. That is, it becomes difficult to form an adhesive rubber layer (evaluated with rubber described later) on the surface of the gas barrier layer with a required thickness. Moreover, when it exceeds 40 mass parts, the required adhesive force will be hard to be obtained. That is, it becomes difficult to firmly adhere the rubber layer to the surface of the gas barrier layer.
- the EPDM content is more preferably 70 to 50 parts by mass. Further, when the EPDM content is less than 20 parts by mass, it is difficult to obtain the required adhesive strength and rubber attachment. Moreover, when it exceeds 80 mass parts, a vulcanization
- the alkylphenol formaldehyde resin acts as a crosslinking agent for the raw rubber and can crosslink the raw rubber.
- the alkylphenol formaldehyde resin also includes a halogenated alkylphenol formaldehyde resin (halogenated alkylphenol formaldehyde resin).
- a halogenated alkylphenol formaldehyde resin is preferable and a brominated alkylphenol formaldehyde resin is more preferable from the viewpoint of excellent adhesion between the gas barrier layer and the rubber layer.
- a commercially available product such as Takiroll 250-I manufactured by Taoka Chemical Co., Ltd. can be used.
- the compounding amount of the alkylphenol formaldehyde resin is 1 to 15 parts by mass, and 2 to 10 parts by mass with respect to 100 parts by mass of the raw rubber from the viewpoint of excellent adhesion between the gas barrier layer and the rubber layer.
- the amount is preferably 2 to 7 parts by mass. If it is less than 1 part by mass, it may be difficult to obtain the required adhesive strength. That is, it may be difficult to firmly adhere the rubber layer to the surface of the gas barrier layer. Moreover, when it exceeds 15 mass parts, the physical property (hardness) of a rubber layer may be impaired.
- the rubber composition preferably further contains carbon black from the viewpoint of excellent adhesion between the gas barrier layer and the rubber layer and excellent reinforcement of the rubber layer.
- the colloidal characteristics of the carbon black that can be used in the present invention are N 2 SA ⁇ 75 m 2 / g and DBP oil absorption from the viewpoint that the adhesion between the gas barrier layer and the rubber layer is excellent and the rubber layer is excellent in reinforcement. preferably in the range of ⁇ 90cm 3 / 100g.
- N 2 SA is 75 m 2 / g or less than DBP absorption is less than 90cm 3/100 g, it is difficult to firmly bond the rubber layer on the surface of the gas barrier layer.
- N 2 SA is preferably 80 to 150 m 2 / g, and more preferably 80 to 120 m 2 / g.
- DBP oil absorption amount is 95 ⁇ 140cm 3 / 100g, and more preferably 100 ⁇ 130cm 3 / 100g.
- N 2 SA means the molecular weight of nitrogen adsorbed on the surface of carbon black, and specifically means a value obtained by measurement by a method prescribed in JIS K 6217-2.
- the DBP oil absorption amount means the amount of oil absorbed by the carbon black aggregate, and specifically means the value obtained by measurement by the method specified in JIS K 6217-4.
- N 2 SA ⁇ 75m 2 / g , and a carbon black as a DBP oil absorption ⁇ 90cm 3 / 100g, for example, ISAF, include those of the above grade HAF.
- the blending amount of the carbon black is preferably 30 to 80 parts by mass, and preferably 40 to 65 parts by mass with respect to 100 parts by mass of the raw rubber, from the viewpoint of excellent adhesion between the gas barrier layer and the rubber layer. It is more preferable. If it is less than 30 parts by mass, it is difficult to obtain the required adhesive force. That is, it becomes difficult to firmly adhere the rubber layer to the surface of the gas barrier layer. On the other hand, when the amount exceeds 80 parts by mass, the viscosity of the unvulcanized rubber becomes high and the workability is impaired.
- the rubber composition (rubber layer) further contains a crosslinking agent other than alkylphenol formaldehyde resin, zinc oxide (ZnO), vulcanization aid, vulcanization accelerator and additive. May be included.
- a crosslinking agent other than alkylphenol formaldehyde resin zinc oxide (ZnO)
- vulcanization aid include fatty acids such as acetyl acid, propionic acid, butanoic acid, stearic acid, acrylic acid, and maleic acid; zinc acetylate, zinc propionate, zinc butanoate, zinc stearate, zinc acrylate, Examples include fatty acid zinc such as zinc maleate.
- vulcanization accelerator examples include thiurams such as tetramethylthiuram disulfide (TMTD) and tetraethylthiuram disulfide (TETD); aldehydes and ammonia such as hexamethylenetetramine; guanidines such as diphenylguanidine; dibenzothiazyl disulfide; (DM) and the like; sulfenamides such as cyclohexylbenzothiazylsulfenamide and the like.
- TMTD tetramethylthiuram disulfide
- TETD tetraethylthiuram disulfide
- aldehydes and ammonia such as hexamethylenetetramine
- guanidines such as diphenylguanidine
- dibenzothiazyl disulfide dibenzothiazyl disulfide
- sulfenamides such as cyclohexylbenz
- additives include fillers such as clay, reinforcing agents other than carbon black, softeners such as paraffinic oil, plasticizers, processing aids, anti-aging agents, pigments, tackifiers, lubricants, dispersants, Examples include processing aids.
- the method for producing the rubber composition is not particularly limited.
- the rubber layer can be formed by extruding a rubber composition into a tubular shape, for example.
- the thickness of the rubber layer is not particularly limited, but is preferably 0.5 to 3.0 mm.
- the hose of the present invention includes an inner tube layer composed of a gas barrier layer and a rubber layer adjacent to the outer surface thereof. Since the gas barrier layer and the rubber layer are adjacent to each other and can be directly bonded to each other, it is not necessary to provide an adhesive layer between the gas barrier layer and the rubber layer. If the inner tube layer is not composed of a gas barrier layer and a rubber layer containing specific components as described above in a specific content, the gas barrier layer and the rubber layer are firmly vulcanized (crosslinked) without using an adhesive. ) Cannot be glued. That is, high adhesiveness (with high adhesive strength and high rubber) cannot be exhibited.
- the inner diameter, outer diameter, and length of the hose of the present invention are not particularly limited.
- the inner diameter of the hose is preferably 5 to 20 mm, and more preferably 7 to 17 mm.
- the hose of the present invention includes a reinforcing layer on the inner tube layer and an outer tube layer on the reinforcing layer.
- the reinforcing layer may be formed in a blade shape or a spiral shape, and is not particularly limited.
- the material to be used include a thread and a wire.
- the reinforcing yarn include yarns made of vinylon fiber, rayon fiber, polyester fiber, nylon fiber, aromatic polyamide fiber and the like.
- a hard steel wire is exemplified, and more specifically, a brass plated wire or a galvanized wire is exemplified for rust prevention and adhesion imparting.
- the outer tube layer is formed on the outer side of the inner tube layer or the reinforcing layer, and the material, structure, thickness, etc. thereof are not particularly limited, and generally used rubber compositions, resins, metal wires, etc. Can be used.
- the rubber composition the same rubber composition as that used for the rubber layer of the inner tube layer can be used.
- the rubber composition contains appropriate crosslinking agents, fillers, reinforcing agents, plasticizers, anti-aging agents, vulcanization accelerators, softeners, tackifiers, lubricants, dispersants, processing aids, etc. May be.
- the resin examples include polyamide resin, polyester resin, polyurethane resin, polyacetal resin, vinyl chloride resin, polypropylene, and polyethylene.
- a metal and a fiber can also be contained for the improvement of the vibration absorption performance by weight increase, and the strength improvement.
- the outer tube layer can be, for example, solid or sponge. Further, the outer tube layer may be, for example, a cylindrical type that is used by inserting the hose of the present invention, a spiral type, or a spring type that is wound around the hose of the present invention.
- the thickness of the outer tube layer is preferably 1 to 5 mm, more preferably 0.5 to 3 mm, and even more preferably 1 to 2 mm.
- the outer tube layer may be formed of a plurality of layers.
- FIG. 1 is a perspective view schematically showing a cutout of each layer of an example of a preferred embodiment of the hose of the present invention.
- the hose 1 of the present invention includes an inner tube layer 2 including a gas barrier layer 21 and a rubber layer 22 adjacent to the outer surface thereof. There is no adhesive layer between the gas barrier layer 21 and the rubber layer 22.
- the gas barrier layer contains hydrotalcite, the gas barrier layer and the rubber layer can be firmly bonded.
- the reinforcing layer 3 is provided on the upper surface of the rubber layer 22, and the outer tube layer 4 is provided on the upper surface thereof.
- the hose of the present invention is not particularly limited as long as it has the inner tube layer, and may have other layers on the outer side of the outer tube layer in the preferred embodiment described with reference to FIG.
- the hose of the present invention does not necessarily have the reinforcing layer as described above, but if the reinforcing layer is provided, the tensile breaking strength of the hose, the usable pressure range, and the fitting property of the hose are improved. preferable.
- the hose of the present invention is used for a hose that transports a high-pressure fluid, it is preferable to have a reinforcing layer.
- the manufacturing method of the hose of this invention is demonstrated.
- the manufacturing method of the hose of this invention is not specifically limited, A conventionally well-known method can be used.
- the gas barrier layer and the rubber layer can be obtained by extrusion molding and coextrusion molding, respectively.
- the rubber layer should just be formed using said rubber composition.
- the gas barrier layer should just be formed using said polyamide resin composition.
- a rubber layer is laminated on the outer surface of the gas barrier layer, and further a reinforcing layer by braiding or spiral winding, and then an outer tube layer (outer rubber). After laminating the layers, the whole can be obtained by vulcanization.
- Vulcanization crosslinking
- a gas barrier layer, a rubber layer, a reinforcing layer, and an outer tube layer are laminated in this order on a mandrel, and then the laminated body on the mandrel is heated to 30 to 30 ° C. under a condition of 140 to 190 ° C.
- the hose can be produced by vulcanization and adhesion by press vulcanization, steam vulcanization, oven vulcanization (hot air vulcanization) or hot water vulcanization for 180 minutes.
- the hose of the present invention is excellent in adhesion between the gas barrier layer and the rubber layer, no gas or liquid stays at the adhesion interface between the gas barrier layer and the rubber layer, and the gas barrier layer in that portion does not swell.
- the hose of the present invention does not require the gas barrier layer and the rubber layer to be bonded with an adhesive or the like, the adverse effect on the environment due to the solvent contained in the adhesive or the like is eliminated, and the manufacturing process of the hose is reduced to reduce the cost Can be lowered.
- the refrigerant-containing composition that can be used for the hose of the present invention is not particularly limited.
- coolant like a fluorine-type compound and a lubricant is mentioned.
- the refrigerant contained in the refrigerant-containing composition include fluorine having a double bond such as 2,3,3,3-tetrafluoropropene (structural formula: CF 3 —CF ⁇ CH 2 , HFO-1234yf). And a saturated hydrofluorocarbon such as HFC-134a (structural formula: CF 3 —CFH 2 ).
- the lubricating oil contained in the refrigerant-containing composition is not particularly limited. For example, a conventionally well-known thing is mentioned.
- the hose of the present invention is a hose that can be used for transporting a refrigerant, and can be applied to a fluid transport hose such as an air conditioner hose (for example, a car air conditioner). Moreover, the hose of this invention can be used for the hose for warm water (for temperature control apparatuses) besides the hose for an air conditioner.
- a fluid transport hose such as an air conditioner hose (for example, a car air conditioner).
- the hose of this invention can be used for the hose for warm water (for temperature control apparatuses) besides the hose for an air conditioner.
- Butyl rubber EXXON BUTYL 268, manufactured by Nippon Butyl Co., Ltd. Chlorinated butyl rubber (Cl-IIR): EXXON CHLOROBUTYL 1066, manufactured by Nihon Butyl Co., Ltd. Brominated butyl rubber (Br-IIR): manufactured by EXXON BROMOBUTYL 2255, manufactured by Nippon Butyl Co., Ltd.
- BIMS Exxpro 3745, manufactured by EXXONMOBIL CHEMICAL COMPANY EPDM: Mitsui EPT4070, carbon black manufactured by Mitsui Chemicals [C. B. (ISAF)]: Show Black N220, manufactured by Showa Cabot Corporation.
- the raw materials shown below were used in the amounts (parts by mass) shown in Table 1, and these were uniformly mixed using a biaxial kneading extruder to produce polyamide resin compositions 2 to 8 shown in Table 1.
- the polyamide resin composition 1 is 100 parts by mass of modified polyamide (alloy of polyamide 6 and carboxyl group-containing modified polyolefin) [trade name Zytel ST811HS, manufactured by DuPont].
- Modified polyamide Alloy of polyamide 6 and carboxyl group-containing modified polyolefin [trade name Zytel ST811HS, manufactured by DuPont]
- Hydrotalcite KW-2200, manufactured by Kyowa Chemical Industry Co., Ltd. Mg 0.7 Al 0.3 O 1.15 , no surface treatment
- MgO Magnesium oxide (Kyowa Mag 150), manufactured by Kyowa Chemical Industry Co., Ltd.
- a sheet is prepared from the polyamide resin composition obtained as described above using an electrothermal press at 230 ° C., and a test piece having a width of 5 mm, a length of 80 mm, and a thickness of 0.15 mm is formed from the sheet. It cut out and made this the test body.
- the Young's modulus of the obtained test specimen was measured according to JIS K 7161 at a tensile speed of 50 mm / min.
- a hose comprising the rubber composition and the polyamide resin composition of each example and each comparative example was manufactured. Specifically, first, the polyamide resin composition obtained as described above is drawn down on a mandrel (outer diameter 11 mm) using an extruder, and a gas barrier layer having a thickness of 0.1 mm is formed. Formed. Next, using the rubber composition obtained as described above, a rubber layer having a thickness of 1.4 mm was formed on the outer surface of the gas barrier layer obtained above. After laminating a rubber layer on the outer surface of the gas barrier layer, the whole was vulcanized to obtain a hose consisting only of the inner tube layer.
- Vulcanization was carried out by applying vapor pressure at about 150 to 180 ° C. A hose with a wall thickness of 1.5 mm and an outer diameter of 14 mm was obtained.
- the gas barrier layer and the rubber layer were bonded using an adhesive (Chemok 402X, manufactured by Lord Corporation).
- the adhesive strength and rubber attachment when the rubber layer was peeled off at a peeling speed of 50 mm / min were measured.
- the adhesive force means an adhesive force (N) per 25 mm in width.
- the thing with an adhesive force of 40 N / 25 mm or more was evaluated as “ ⁇ ”, and the adhesive force of less than 40 N / 25 mm was evaluated as “x”.
- the area with rubber was evaluated for its area and thickness. With rubber (area) means the area ratio (%) where the rubber peeled off from the rubber layer adheres on the peeled gas barrier layer after the evaluation of the adhesive strength.
- Comparative Example 1-1 in which the gas barrier layer and the rubber layer were bonded with an adhesive, the rubber attachment became thin, and the resin peeled off in the delamination test. It was found that the adhesion with the rubber layer was insufficient.
- Comparative Example 1-2 and Comparative Example 3 in which the polyamide resin composition does not contain hydrotalcite are the adhesive strength between the gas barrier layer and the rubber layer (adhesive strength between the polyamide resin composition and the rubber composition). The same shall apply hereinafter) and the adhesiveness was poor.
- Comparative Example 2 and Comparative Example 4 in which the polyamide resin composition does not contain hydrotalcite, the rubber thickness was insufficient with respect to the rubber attachment, and the adhesiveness was poor.
- Comparative Example 5 in which the amount of hydrotalcite was less than 0.5 parts by mass with respect to 100 parts by mass of the modified polyamide, the rubber thickness was insufficient with respect to the rubber attachment, and the adhesiveness was poor.
- Comparative Example 6 in which the amount of hydrotalcite exceeds 20 parts by mass with respect to 100 parts by mass of the modified polyamide, although the adhesiveness is excellent, the Young's modulus of the polyamide resin composition exceeds 300 MPa.
- Comparative Example 2 corresponds to the aspect described in Patent Document 2.
- Comparative Example 4 corresponds to the aspect described in Patent Document 1.
- Examples 1 to 10 have high adhesion between the gas barrier layer and the rubber layer and good adhesion with rubber, and are excellent in adhesion between the gas barrier layer and the rubber layer.
- Examples 4 to 7 and 10 in which the raw material rubber contains BIMS, Br-IIR as a halogenated butyl rubber, and further EPDM have high adhesive strength and excellent adhesiveness. Further, it is clear from the results of Examples 4 to 6 that the adhesive force between the gas barrier layer and the rubber layer is improved as the amount of hydrotalcite is increased. Also in the result of Example 7, the adhesive force between the gas barrier layer and the rubber layer is sufficiently high, and even when the amount of hydrotalcite exceeds 10 parts by mass with respect to 100 parts by mass of the modified polyamide, the adhesion between the gas barrier layer and the rubber layer is achieved. There is no extreme decrease in sex. In Examples 1 to 10, the resin does not peel off even in the delamination test. In Examples 1 to 9, as compared with Example 10, the rubber composition was further blended with 30 to 80 parts by mass of carbon black with respect to 100 parts by mass of the raw rubber, thereby lowering the minimum Mooney viscosity. Excellent workability.
- Example 11 ⁇ Manufacture of hose 1 having reinforcing layer and outer tube layer> Using a resin extruder on the surface of a thermoplastic resin mandrel having an outer diameter of 11 mm, the gas barrier layer was extruded to a thickness of 0.15 mm with the polyamide resin composition 4 of Example 4 (extrusion temperature 240 ° C.). A rubber layer (rubber composition of Example 4) having a thickness of 1.2 mm was extruded to form an inner tube layer, and PET (polyethylene terephthalate) fibers having a total yarn amount of 80,000 dtex were alternately wound in a spiral shape.
- PET polyethylene terephthalate
- a two-layer reinforcing layer is formed, and a 1.0 mm thick cover rubber layer (the following butyl rubber composition A is used) is extruded onto the extruded outer tube layer.
- Methyl pentene resin was extruded into a shell, and the resulting tubular laminate was vulcanized for 100 minutes at 160 ° C., and then the shell and mandrel were removed from the tubular laminate to produce a hose.
- the obtained hose is referred to as hose 1.
- the hose 1 is excellent in adhesion between the gas barrier layer and the rubber layer.
- Butyl rubber composition A (cover rubber layer): 100 parts by weight of butyl rubber, 80 parts by weight of carbon black (HAF), 3 parts by weight of stearic acid, 10 parts by weight of paraffin oil, 2 parts by weight of zinc oxide, and brominated alkylphenol formaldehyde resin 8 A composition containing parts by mass.
- Example 12 ⁇ Manufacture of hose 2> A hose 2 was produced in the same manner as in Example 11 except that the polyamide resin composition and rubber composition used in Example 4 were replaced with the polyamide resin composition and rubber composition used in Example 5. The hose 2 is excellent in adhesion between the gas barrier layer and the rubber layer.
- Example 13 ⁇ Manufacture of hose 3> A hose 3 was produced in the same manner as in Example 11 except that the polyamide resin composition and the rubber composition used in Example 4 were replaced with the polyamide resin composition and the rubber composition used in Example 6. The hose 3 is excellent in adhesion between the gas barrier layer and the rubber layer.
- Example 14 ⁇ Manufacture of hose 4> A hose 4 was produced in the same manner as in Example 11 except that the polyamide resin composition and rubber composition used in Example 4 were replaced with the polyamide resin composition and rubber composition used in Example 7. The hose 4 is excellent in adhesion between the gas barrier layer and the rubber layer.
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Abstract
Description
本願出願人はこれまでに接着剤等を使用せずに樹脂とゴムとを接合するホースを提案している(特許文献1)。
また従来接着剤を使用せずに最内層と中間ゴム層とを接着させるホースとして特許文献2が提案されている。
したがって本発明の目的はガスバリア層とゴム層との接着性に優れたホースを提供することにある。
ガスバリア層とその外表面に隣接したゴム層とからなる内管層を備える冷媒輸送用ホースであって、
前記ガスバリア層が、ポリアミドとカルボキシル基含有変性ポリオレフィンとをブレンドして得られる変性ポリアミド100質量部に対して、ハイドロタルサイト0.5~20質量部を含有するポリアミド樹脂組成物からなり、
前記ゴム層が、原料ゴム:100質量部に対して、アルキルフェノールホルムアルデヒド樹脂:1~15質量部を配合してなるゴム組成物からなり、
前記原料ゴムが、BIMS、ならびにブチルゴムおよび/またはハロゲン化ブチルゴムである共重合ゴムからなる群から選ばれる少なくとも1種を含む冷媒輸送用ホースが、ガスバリア層とゴム層との接着性に優れることを見出し、本発明を完成させた。
1. ガスバリア層とその外表面に隣接したゴム層とからなる内管層を備える冷媒輸送用ホースであって、
前記ガスバリア層が、ポリアミドとカルボキシル基含有変性ポリオレフィンとをブレンドして得られる変性ポリアミド100質量部に対して、ハイドロタルサイト0.5~20質量部を含有するポリアミド樹脂組成物からなり、
前記ゴム層が、原料ゴム:100質量部に対して、アルキルフェノールホルムアルデヒド樹脂:1~15質量部を配合してなるゴム組成物からなり、
前記原料ゴムが、BIMS、ならびにブチルゴムおよび/またはハロゲン化ブチルゴムである共重合ゴムからなる群から選ばれる少なくとも1種を含む冷媒輸送用ホース。
2. 前記ゴム組成物が、さらに、前記原料ゴム:100質量部に対して、カーボンブラック:30~80質量部を配合し、
前記原料ゴムが、BIMSと、ブチルゴムおよび/またはハロゲン化ブチルゴムである共重合ゴムと、さらにEPDMとを含み、
前記原料ゴムにおける前記BIMSの含有量が5~40質量部であり、前記BIMSと前記共重合ゴムとの含有量の合計が20~80質量部であり、EPDMの含有量が80~20質量部であり、
前記カーボンブラックは、N2SA≧75m2/gであり、かつDBP吸油量≧90cm3/100gである上記1に記載の冷媒輸送用ホース。
3. 前記共重合ゴムがハロゲン化ブチルゴムである、上記1または2に記載の冷媒輸送用ホース。
4. 前記ポリアミドが、ポリアミド6、ポリアミド11、ポリアミド12、ポリアミド4-6、ポリアミド6-6、ポリアミド6-10、ポリアミド6-12およびポリアミドMXD-6ならびにこれらの中の2種以上のコポリマーからなる群から選ばれる少なくとも1つである、上記1~3のいずれかに記載の冷媒輸送用ホース。
5. 前記ハイドロタルサイトは、表面処理がなされていない上記1~4のいずれかに記載の冷媒輸送用ホース。
6. 前記ハイドロタルサイトが、原料ハイドロタルサイトを焼成することによって製造されるものである上記1~5のいずれかに記載の冷媒輸送用ホース。
7. 前記ガスバリア層と前記ゴム層との間に接着剤層を有さない、上記1~6のいずれかに記載の冷媒輸送用ホース。
8. 前記ガスバリア層と前記ゴム層とが直接接着している上記1~7のいずれかに記載の冷媒輸送用ホース。
9. 前記内管層の上に補強層があり、前記補強層の上に外管層がある上記1~8のいずれかに記載の冷媒輸送用ホース。
本発明の冷媒輸送用ホースは、ガスバリア層とその外表面に隣接したゴム層とからなる内管層を備える冷媒輸送用ホースであって、前記ガスバリア層が、ポリアミドとカルボキシル基含有変性ポリオレフィンとをブレンドして得られる変性ポリアミド100質量部に対して、ハイドロタルサイト0.5~20質量部を含有するポリアミド樹脂組成物からなり、前記ゴム層が、原料ゴム:100質量部に対して、アルキルフェノールホルムアルデヒド樹脂:1~15質量部を配合してなるゴム組成物からなり、前記原料ゴムが、BIMS、ならびにブチルゴムおよび/またはハロゲン化ブチルゴムである共重合ゴムからなる群から選ばれる少なくとも1種を含むホースである。
以下、本発明の冷媒輸送用ホースを「本発明のホース」ということがある。
ガスバリア層について説明する。
本発明のホースにおけるガスバリア層は、ポリアミドとカルボキシル基含有変性ポリオレフィンとをブレンドして得られる変性ポリアミド100質量部に対して、ハイドロタルサイト0.5~20質量部を含有するポリアミド樹脂組成物を用いて形成される。
そのため、ガスバリア層とゴム層との架橋密度が上がり、ガスバリア層とゴム層との接着性が優れると考えられる。
また、ゴム組成物に含有される架橋剤としてのアルキルフェノールホルムアルデヒド樹脂がハロゲン化されている場合、ハイドロタルサイトはハロゲン化されたアルキルフェノールホルムアルデヒド樹脂からハロゲンを引き抜くため、原料ゴムと架橋剤との反応が進んでガスバリア層との界面付近にあるゴム自身の架橋密度が上がりゴム層が強くなると共に、上述のようにガスバリア層とゴム層との架橋密度が上がることによって、ガスバリア層とゴム層との接着性がより優れると考えられる。
ポリアミド樹脂組成物に含有されるハイドロタルサイトは特に制限されない。ハイドロタルサイトは天然物、合成物のいずれであってもよい。具体的には例えば、
Mg3ZnAl2(OH)12CO3・wH2O(wは正の実数を表す。)、
MgxAly(OH)2x+3y-2CO3・wH2O(但しxは1~10、yは1~10、wは正の実数を表す。)、
MgxAly(OH)2x+3y-2CO3[但しxは1~10、yは1~10を表す。具体的には例えばMg4.3Al2(OH)12.6CO3(商品名DHT-4A-2、協和化学工業社製)]、
Mg1-xAlxO3.83x(0.2≦x<0.5。具体的には例えばMg0.7Al0.3O1.15(商品名KW-2200、協和化学工業社製)])が挙げられる。
ハイドロタルサイトは、そのハロゲンキャッチ能力が高く、ガスバリア層とゴム層との接着性により優れるという観点から、例えば脂肪酸(高級脂肪酸を含む。)、脂肪酸エステルなどの表面処理剤で表面処理がなされていないもの、つまりハイドロタルサイトの表面が無処理であるものとすることができる。
ハイドロタルサイトは、それぞれ単独でまたは2種以上を組み合わせて使用することができる。
また、ハイドロタルサイトの量は、ガスバリア層とゴム層との接着性により優れ、柔軟性、非振動伝達性に優れ、これらの接着性と柔軟性と非振動伝達性とのバランスがよいという観点から、変性ポリアミド100質量部に対して、2~15質量部であるのが好ましく、3~15質量部であるのがより好ましい。
混合温度は、混合加工性に優れるという観点から、180~300℃であるのが好ましく、200~280℃であるのがより好ましい。
硬化物のヤング率が300MPa以下である場合、柔軟性、非振動伝達性に優れる。硬化物のヤング率が300MPaを超える場合、ホース自身の曲げ剛性が高くなり、エンジンルーム内での取り回し性が悪く、冷媒圧縮用コンプレッサーの振動が車のボディー側に伝わってしまい、振動と音の面で問題が発生しやすい。
本発明においては、変性ポリアミド100質量部に対するハイドロタルサイトの量が0.5~20質量部であることによって、硬化物のヤング率を300MPa以下とすることができる。
ガスバリア層の厚さは特に限定されないものの、0.01~0.50mmが好ましく、0.05~0.30mmがより好ましく、0.05~0.20mmがさらに好ましい。このような範囲であると、成形作業性および耐冷媒透過性ならびに可撓性がより良好となる傾向がある。
ゴム層について説明する。
ゴム層は、原料ゴム:100質量部に対して、アルキルフェノールホルムアルデヒド樹脂:1~15質量部を配合してなるゴム組成物を用いて形成され、前記原料ゴムが、BIMS、ならびにブチルゴムおよび/またはハロゲン化ブチルゴムである共重合ゴムからなる群から選ばれる少なくとも1種を含む。
原料ゴムはBIMS、ならびにブチルゴムおよび/またはハロゲン化ブチルゴムである共重合ゴムからなる群から選ばれる少なくとも1種を含む。原料ゴムはフェノール系樹脂によって架橋できるものとすることができる。
BIMSは、p-アルキルスチレンとイソモノオレフィンとの共重合ゴムの臭素化物である。BIMSとしては、例えば、p-アルキルスチレン(PAS)含有量が5~25質量%、臭素(Br)含有量が1.5質量%以上であり、p-アルキルスチレン単位と臭素単位との質量比が0.15≦Br/PAS≦0.40である、炭素原子数4~7のイソモノオレフィンとp-アルキルスチレンとの共重合ゴムの臭素化物であるものが挙げられる。具体的には、臭素化イソブチレンp-メチルスチレン共重合ゴムが挙げられる。BIMSのムーニー粘度(ML1+8、125℃)は30以上である。
前記共重合ゴムは、ブチルゴムおよび/またはハロゲン化ブチルゴムであり、ハロゲン化ブチルゴムであることが好ましい。得られる本発明のホースの接着性がより優れ、耐久性が高まるからである。
ブチルゴムとしては、一般的なイソブチレン・イソプレンゴムを使用でき、特に制限されないが、そのイソプレンの含有量は不飽和度として0.6~2.5モル%、分子量はムーニー粘度で35~60(125℃)であることが好ましい。
ハロゲン化ブチルゴムとしては塩素化ブチルゴム、臭素化ブチルゴム等が挙げられる。これらのハロゲン化ブチルゴムも、一般的なものを使用することができるが、塩素化ブチルゴムの場合、塩素含有量は1~2.5質量%、イソプレンの含有量は不飽和度として0.6~2.5モル%、分子量はムーニー粘度で30~60(125℃)であることが好ましい。また、臭素化ブチルゴムの場合、臭素含有量は1~2.5質量%、イソプレンの含有量は不飽和度として0.6~2.5モル%、分子量はムーニー粘度で25~55(125℃)であることが好ましい。
前記原料ゴムがさらに含むことができるEPDMは、エチレン、プロピレンおよびジエンを含むモノマーを重合させることによって得られる一般的な共重合体ゴムであれば特に限定されない。市販品としては、三井化学社製の三井EPT 4070を例示することができる。プロピレン含有量は、10~70mol%であるのが好ましく、15~50mol%であるのがより好ましい。ジエン成分は、例えば、エチリデンノルボルネン、ジシクロペンタジエン、1,4-ヘキサジエンが挙げられる。中でも、架橋速度の速いエチリデンノルボルネンが好ましい。ジエン成分の量は、ヨウ素価で3~25であるのが好ましく、5~20であるのがより好ましい。
ガスバリア層とゴム層との接着性により優れるという観点から、原料ゴムにおけるBIMSとブチルゴムおよび/またはハロゲン化ブチルゴムである共重合ゴムとの含有量の合計は20~80質量部であるのが好ましい。
ガスバリア層とゴム層との接着性により優れるという観点から、原料ゴムにおけるEPDMの含有量は80~20質量部であるのが好ましい。
また、EPDMの含有量が20質量部未満では、必要とする接着力およびゴム付きが得られ難い。また80質量部を超えると、加硫速度が遅くなりホースの生産性が低下する。
アルキルフェノールホルムアルデヒド樹脂は、前記原料ゴムの架橋剤として作用し、原料ゴムを架橋させることができる。
アルキルフェノールホルムアルデヒド樹脂には、ハロゲン化されたアルキルフェノールホルムアルデヒド樹脂(ハロゲン化アルキルフェノールホルムアルデヒド樹脂)も含まれる。なかでもガスバリア層とゴム層との接着性により優れるという観点から、ハロゲン化アルキルフェノールホルムアルデヒド樹脂が好ましく、臭素化アルキルフェノールホルムアルデヒド樹脂がより好ましい。
アルキルフェノールホルムアルデヒド樹脂としては、例えば田岡化学工業社製のタッキロール250-I等の市販品を使用することができる。
本発明で用いることができるカーボンブラックのコロイダル特性は、ガスバリア層とゴム層との接着性により優れ、ゴム層の補強性に優れるという観点から、N2SA≧75m2/g、かつDBP吸油量≧90cm3/100gであるのが好ましい。N2SAが75m2/g未満またはDBP吸油量が90cm3/100g未満であると、ガスバリア層の表面にゴム層を強固に接着することが困難になる。
N2SAは80~150m2/gであることが好ましく、80~120m2/gであることがより好ましい。
DBP吸油量は95~140cm3/100gであることが好ましく、100~130cm3/100gであることがより好ましい。
ここでN2SAとはカーボンブラックの表面に吸着する窒素分子量を意味し、具体的にはJIS K 6217-2に規定の方法で測定して求めた値を意味するものとする。
また、DBP吸油量はカーボンブラックの凝集体に吸収される油分量を意味し、具体的にはJIS K 6217-4に規定の方法で測定して求めた値を意味するものとする。
N2SA≧75m2/g、かつDBP吸油量≧90cm3/100gであるカーボンブラックとしては、例えば、ISAF、HAF以上のグレードのものが挙げられる。
加硫助剤としては、例えば、アセチル酸、プロピオン酸、ブタン酸、ステアリン酸、アクリル酸、マレイン酸等の脂肪酸;アセチル酸亜鉛、プロピオン酸亜鉛、ブタン酸亜鉛、ステアリン酸亜鉛、アクリル酸亜鉛、マレイン酸亜鉛等の脂肪酸亜鉛が挙げられる。
加硫促進剤としては、例えば、テトラメチルチウラムジスルフィド(TMTD)、テトラエチルチウラムジスルフィド(TETD)等のチウラム系;ヘキサメチレンテトラミン等のアルデヒド・アンモニア系;ジフェニルグアニジン等のグアニジン系;ジベンゾチアジルジサルファイド(DM)等のチアゾール系;シクロヘキシルベンゾチアジルスルフェンアマイド等のスルフェンアミド系のものが挙げられる。
添加剤としては、例えば、クレー等の充填剤、カーボンブラック以外の補強剤、パラフィン系オイル等の軟化剤、可塑剤、加工助剤、老化防止剤、顔料、粘着付与剤、滑剤、分散剤、加工助剤等が挙げられる。
ゴム層の厚さは特に限定されないが、0.5~3.0mmが好ましい。
内管層が上記に説明したような特定成分を特定含有量で含むガスバリア層およびゴム層からなるものでないと、接着剤を使用することなしにガスバリア層とゴム層とを強固に加硫(架橋)接着することはできない。すなわち、高接着性(高接着力および高ゴム付き)を発現することはできない。
例えばホースの内径は5~20mmであることが好ましく、7~17mmであることがより好ましい。
本発明のホースは、内管層の上に補強層があり、補強層の上に外管層があるのが好ましい態様の1つとして挙げられる。
外管層の厚さは、1~5mmであるのが好ましく、0.5~3mmがより好ましく、1~2mmがさらに好ましい。
外管層が複数層で形成されていてもよい。
図1は、本発明のホースの好適実施例の一例についてその各層を切り欠き模式的に示す斜視図である。
図1において本発明のホース1は、ガスバリア層21とその外表面に隣接したゴム層22とからなる内管層2を備えている。ガスバリア層21とゴム層22の間には、接着剤層は存在していない。しかし、本発明においてはガスバリア層がハイドロタルサイトを含有することによってガスバリア層とゴム層とは強固に接着することができる。
また、本発明のホースは上記のように補強層を必ずしも有している必要はないが、補強層を備えていると、ホースの引張り破断強度、使用可能圧力範囲および金具装着性が向上するので好ましい。特に、本発明のホースを、高圧流体を輸送するホースに用いる場合は、補強層を有することが好ましい。
本発明のホースの製造方法は特に限定されず、従来公知の方法を用いることができる。例えばガスバリア層およびゴム層はそれぞれを押出し成形、共押出し成形させることによって得ることができる。ここで、ゴム層は上記のゴム組成物を用いて形成されるものであればよい。ガスバリア層は上記のポリアミド樹脂組成物を用いて形成されるものであればよい。例えば前述の図1を用いて説明した好適実施態様のホースの場合であれば、ガスバリア層の外表面にゴム層を積層し、さらに編組またはスパイラル巻などにより補強層、ついで外管層(外側ゴム層)を積層した後、全体を加硫することによって得ることができる。
加硫(架橋)は約150~180℃の条件下で行なうことができる。
冷媒含有組成物に含有される冷媒としては、例えば、2,3,3,3-テトラフルオロプロペン(構造式:CF3-CF=CH2、HFO-1234yf)のような二重結合を有するフッ素系化合物;HFC-134a(構造式:CF3-CFH2)のような飽和ハイドロフルオロカーボンが挙げられる。
以下に示す成分(臭素化アルキルフェノールホルムアルデヒド樹脂、ステアリン酸亜鉛を除く。)を第1表に示す量(質量部)で用いてロール、バンバリーミキサーによって混練し、引き続いてこれらに臭素化アルキルフェノールホルムアルデヒド樹脂、ステアリン酸亜鉛を第1表に示す量(質量部)で加えてこれらを混練してゴム組成物を製造した。
塩素化ブチルゴム(Cl-IIR):EXXON CHLOROBUTYL 1066、日本ブチル株式会社製
臭素化ブチルゴム(Br-IIR):EXXON BROMOBUTYL 2255、日本ブチル株式会社製
BIMS:Exxpro 3745、EXXONMOBIL CHEMICAL COMPANY製
EPDM:三井EPT4070、三井化学社製
カーボンブラック[C.B.(ISAF)]:ショウブラックN220、昭和キャボット社製。N2SA≧75m2/gでありかつDBP吸油量≧90cm3/100gであるカーボンブラック
カーボンブラック[C.B.(HAF)]:ショウブラックN330、昭和キャボット社製、N2SA≧75m2/gでありかつDBP吸油量≧90cm3/100gであるカーボンブラック
ステアリン酸(St Acid):ルナックYA、花王株式会社製
パラフィン油:プロセスオイル123、昭和シェル石油社製
ステアリン酸亜鉛:ステアリン酸亜鉛、正同化学工業社製
臭素化アルキルフェノールホルムアルデヒド樹脂:タッキロール250-I、田岡化学工業株式会社製
以下に示す原料を第1表に示す量(質量部)で用い、これらを2軸混練押出機を用いて均一に混合し、第1表に示すポリアミド樹脂組成物2~8を製造した。なお、ポリアミド樹脂組成物1は、変性ポリアミド(ポリアミド6とカルボキシル基含有変性ポリオレフィンとのアロイ)[商品名Zytel ST811HS、デュポン社製]100質量部である。
変性ポリアミド:ポリアミド6とカルボキシル基含有変性ポリオレフィンとのアロイ[商品名Zytel ST811HS、デュポン社製]
ハイドロタルサイト:KW-2200、協和化学工業社製。Mg0.7Al0.3O1.15、表面処理なし
MgO:酸化マグネシウム(キョーワマグ150)、協和化学工業株式会社製
ゴム組成物の押し出し加工性試験、ゴム組成物の物性、ポリアミド樹脂組成物のヤング率、ゴム組成物/ポリアミド樹脂組成物接着試験、デラミネーション試験を以下に示す方法で評価した。結果を第1表に示す。
[ゴム組成物の押し出し加工性試験]
上記のようにして得られた各ゴム組成物の最低ムーニー粘度を測定した。最低ムーニー粘度はJIS K 6300-1のムーニースコーチ試験で、125℃において測定した値(Vm)を意味するものとする。
また、小型スクリュー式押し出し機(スクリューは圧縮タイプを使用)に、丸棒状となるヘッドを組み付け、ヘッド、シリンダー温度を80℃、回転数を60rpmにて押し出し性を確認した。そして外観等、ホースとして使用可能なレベルにある形状のものを「○」、使用不可レベルにあるものを「×」として示した。
上記のようにして得られた各ゴム組成物を150℃のプレス成型機を用い、面圧3.0MPaの圧力下で45分間加硫して、2mm厚の加硫シートを作製した。このシートからJIS3号ダンベル状の試験片を打ち抜き、引張速度500mm/分での引張試験をJIS K6251に準拠して行い、引張強さ(TB)[MPa]、切断時伸び(EB)[%]、100%モジュラス(M100)[MPa]を室温にて測定した。
また、JIS K6253のタイプAデュロメータに準じて、各ゴム組成物の硬化物の室温における硬さ(HS)を測定した。
上記のようにして得られたポリアミド樹脂組成物を230℃の条件下で電熱プレスを用いてシートを作製し、シートから幅5mm、長さ80mm、厚さ0.15mmの大きさの試験片を切り出し、これを試験体とした。
得られた試験体について50mm/分の引張速度でJIS K 7161に準じてヤング率を測定した。
各実施例および各比較例のゴム組成物およびポリアミド樹脂組成物を用いてなるホースを製造した。
具体的には、初めに、上記のようにして得られたポリアミド樹脂組成物を、押出し機を用いてマンドレル(外径11mm)の上に引き落として成形し、厚さ0.1mmのガスバリア層を形成した。
次に上記のようにして得られたゴム組成物を用いて、上記で得たガスバリア層の外表面に、厚さ1.4mmのゴム層を形成した。ガスバリア層の外表面にゴム層を積層した後、全体を加硫することによって内管層のみからなるホースを得た。加硫条件は約150~180℃で蒸気圧をかけ加硫を行った。そして、肉厚が1.5mmであって外径が14mmのホースを得た。
なお、比較例1-1については、ガスバリア層とゴム層とを接着剤(Chemlok 402X、Lord Corporation製)を用いて接着した。
上記のようして得た各ホースについて、剥離スピード50mm/分でゴム層を剥離したときの接着力およびゴム付きを測定した。
ここで接着力は幅25mm当たりの接着力(N)を意味する。また、接着力が40N/25mm以上のものを「○」、接着力が40N/25mm未満のものを「×」として評価した。
ゴム付きはその面積と厚さについて評価された。
ゴム付き(面積)は、上記の接着力の評価後の剥離されたガスバリア層上において、ゴム層から剥がれたゴムが付着している面積比(%)を意味する。
ゴム付き(厚さ)は、ゴム層から剥がれてガスバリア層に付いたゴムの厚さを目視にて評価し、「厚い」、「やや厚い」、「薄い」、「界面」(ガスバリア層とゴム層との界面で剥離したものを意味する。)で示した。
ゴム付きの判定は、ゴム付きが厚いものを「○(良好)」、ゴム付きがやや厚いものを「△」、「薄い」ものおよび「界面」で剥離したものを「×」と評価してこれを記した。
上記と同様の方法で、ホースの内径11mm、外径14mm(ホースの肉厚は1.5mmである)、長さ50cmのホースを製造した。
次に、ホースに冷媒(HFC-134a)を封入後、ホースの両末端に金具を装着して封をしたものを90℃のオーブン中に24時間放置した。ここで冷媒は0.6g/cm3となるように封入した。
次に冷媒を解放後、ただちに120℃のオーブンに入れ、24時間放置した。
そして、その後、ホースを半分に切り(縦割り)、樹脂(ガスバリア層)の剥離を確認した。樹脂の剥離がなかったものを「○」、樹脂の剥離が発生したものを「×」として示す。
ポリアミド樹脂組成物がハイドロタルサイトを含有しない、比較例1-2、比較例3は、ガスバリア層とゴム層との間の接着力(ポリアミド樹脂組成物とゴム組成物との間の接着力。以下同様。)が低く、接着性に劣った。
ポリアミド樹脂組成物がハイドロタルサイトを含有しない、比較例2、比較例4は、ゴム付きに関しゴムの厚さが不十分であり、接着性に劣った。
変性ポリアミド100質量部に対してハイドロタルサイトの量が0.5質量部未満である比較例5は、ゴム付きに関しゴムの厚さが不十分であり、接着性に劣った。
変性ポリアミド100質量部に対してハイドロタルサイトの量が20質量部を超える比較例6は、接着性は優れるものの、ポリアミド樹脂組成物のヤング率が300MPaを超えた。
ポリアミド樹脂組成物がハイドロタルサイトを含有せず代わりに酸化マグネシウムを含有する比較例7は、ガスバリア層とゴム層との間の接着力が低く、ゴム付きが不十分であり、ガスバリア層とゴム層との接着性に劣った。これは、酸化マグネシウムが変性ポリアミドに含まれるカルボキシル基変性ポリオレフィンが有するカルボキシル基と反応してアイオノマーを形成し、その結果カルボキシル基変性ポリオレフィンがゴム組成物と反応しなくなることが原因であると本願発明者らは推察する。
なお、比較例2は特許文献2に記載の態様に相当する。また、比較例4は特許文献1に記載の態様に相当する。
これらに対して、実施例1~10はガスバリア層とゴム層との接着力が高くゴム付きも良好であり、ガスバリア層とゴム層との接着性に優れる。
なかでも、原料ゴムが、BIMSとハロゲン化ブチルゴムとしてBr-IIRとさらにEPDMとを含む実施例4~7、10は接着力が高く接着性により優れる。
また、ハイドロタルサイトの量が増えるにつれてガスバリア層とゴム層との接着力が向上することが実施例4~6の結果から明らかである。実施例7の結果においてもガスバリア層とゴム層との接着力は十分に高く、ハイドロタルサイトの量が変性ポリアミド100質量部に対して10質量部を超えてもガスバリア層とゴム層との接着性が極度に低下することはない。
また、実施例1~10はデラミネーション試験でも樹脂の剥離が生じることがない。
実施例1~9は、実施例10と比較して、ゴム組成物がさらに原料ゴム:100質量部に対してカーボンブラック:30~80質量部を配合することによって、最低ムーニー粘度が低く、押し出し加工性に優れる。
外径11mmの熱可塑性樹脂製マンドレルの表面に樹脂押出し機を用いて、実施例4のポリアミド樹脂組成物4でガスバリア層を0.15mmの厚さに押出し(押出し温度240℃)、その表面に厚さ1.2mmのゴム層(実施例4のゴム組成物)を押出して内管層とし、その上に総糸量80,000dtexのPET(ポリエチレンテレフタレート)繊維を交互にスパイラル状に巻きつけた2層の補強層を形成し、その上に厚さ1.0mmのカバーゴム層(下記のブチルゴム系組成物Aを使用した。)を押し出して押出し外管層とし、更にその上に周知のポリメチルペンテン樹脂を押出し外皮とし、得られた管状の積層体を160℃の条件下で100分間加硫した後、管状積層体から外皮とマンドレルを取り除いてホースを製造した。得られたホースをホース1とする。ホース1はガスバリア層とゴム層との接着性に優れる。
実施例4で使用されたポリアミド樹脂組成物およびゴム組成物を実施例5で使用されたポリアミド樹脂組成物およびゴム組成物に代えたほかは実施例11と同様にしてホース2を製造した。ホース2はガスバリア層とゴム層との接着性に優れる。
実施例4で使用されたポリアミド樹脂組成物およびゴム組成物を実施例6で使用されたポリアミド樹脂組成物およびゴム組成物に代えたほかは実施例11と同様にしてホース3を製造した。ホース3はガスバリア層とゴム層との接着性に優れる。
実施例4で使用されたポリアミド樹脂組成物およびゴム組成物を実施例7で使用されたポリアミド樹脂組成物およびゴム組成物に代えたほかは実施例11と同様にしてホース4を製造した。ホース4はガスバリア層とゴム層との接着性に優れる。
2 内管層
21 ガスバリア層
22 ゴム層
3 補強層
4 外管層
Claims (9)
- ガスバリア層とその外表面に隣接したゴム層とからなる内管層を備える冷媒輸送用ホースであって、
前記ガスバリア層が、ポリアミドとカルボキシル基含有変性ポリオレフィンとをブレンドして得られる変性ポリアミド100質量部に対して、ハイドロタルサイト0.5~20質量部を含有するポリアミド樹脂組成物からなり、
前記ゴム層が、原料ゴム:100質量部に対して、アルキルフェノールホルムアルデヒド樹脂:1~15質量部を配合してなるゴム組成物からなり、
前記原料ゴムが、BIMS、ならびにブチルゴムおよび/またはハロゲン化ブチルゴムである共重合ゴムからなる群から選ばれる少なくとも1種を含む冷媒輸送用ホース。 - 前記ゴム組成物が、さらに、前記原料ゴム:100質量部に対して、カーボンブラック:30~80質量部を配合し、
前記原料ゴムが、BIMSと、ブチルゴムおよび/またはハロゲン化ブチルゴムである共重合ゴムと、さらにEPDMとを含み、
前記原料ゴムにおける前記BIMSの含有量が5~40質量部であり、前記BIMSと前記共重合ゴムとの含有量の合計が20~80質量部であり、EPDMの含有量が80~20質量部であり、
前記カーボンブラックは、N2SA≧75m2/gであり、かつDBP吸油量≧90cm3/100gである請求項1に記載の冷媒輸送用ホース。 - 前記共重合ゴムがハロゲン化ブチルゴムである、請求項1または2に記載の冷媒輸送用ホース。
- 前記ポリアミドが、ポリアミド6、ポリアミド11、ポリアミド12、ポリアミド4-6、ポリアミド6-6、ポリアミド6-10、ポリアミド6-12およびポリアミドMXD-6ならびにこれらの中の2種以上のコポリマーからなる群から選ばれる少なくとも1つである、請求項1~3のいずれかに記載の冷媒輸送用ホース。
- 前記ハイドロタルサイトは、表面処理がなされていない請求項1~4のいずれかに記載の冷媒輸送用ホース。
- 前記ハイドロタルサイトが、原料ハイドロタルサイトを焼成することによって製造されるものである請求項1~5のいずれかに記載の冷媒輸送用ホース。
- 前記ガスバリア層と前記ゴム層との間に接着剤層を有さない、請求項1~6のいずれかに記載の冷媒輸送用ホース。
- 前記ガスバリア層と前記ゴム層とが直接接着している請求項1~7のいずれかに記載の冷媒輸送用ホース。
- 前記内管層の上に補強層があり、前記補強層の上に外管層がある請求項1~8のいずれかに記載の冷媒輸送用ホース。
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JP2010541644A JP4766196B1 (ja) | 2010-04-27 | 2010-04-27 | 冷媒輸送用ホース |
US13/643,993 US8642149B2 (en) | 2010-04-27 | 2010-04-27 | Hose for transporting refrigerant |
CN201080067056.9A CN102905881B (zh) | 2010-04-27 | 2010-04-27 | 制冷剂输送用软管 |
PCT/JP2010/057446 WO2011135668A1 (ja) | 2010-04-27 | 2010-04-27 | 冷媒輸送用ホース |
EP10850687.4A EP2565025B1 (en) | 2010-04-27 | 2010-04-27 | Hose for transporting refrigerant |
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CN105916940B (zh) | 2013-11-15 | 2019-04-09 | 罗地亚经营管理公司 | 用于金属涂层的聚酰胺组合物以及涂覆有其的金属部件 |
CN103612377B (zh) * | 2013-12-10 | 2015-03-04 | 五行材料科技(江苏)有限公司 | 压裂液输送软管及其制造方法及共挤模具 |
CN106091453A (zh) * | 2016-06-17 | 2016-11-09 | 广东美的制冷设备有限公司 | 制冷装置 |
JP7360034B2 (ja) * | 2019-11-28 | 2023-10-12 | 横浜ゴム株式会社 | 冷媒輸送用ホース |
CN112477052A (zh) * | 2020-08-04 | 2021-03-12 | 浙江仙居永固橡胶科技有限公司 | 一种汽车冷却水管橡胶材料的制备方法 |
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